Imaging lens

Abstract

An imaging lens includes, in order from an object side to an image side, a first lens L1 having negative refractive power, a second lens L2 having positive refractive power, a third lens L3 having positive refractive power, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 having negative refractive power, wherein said eighth lens L8 has an aspheric image-side surface having at least one inflection point.

Claims

1. An imaging lens comprising, in order from an object side to an image side, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having negative refractive power, wherein said eighth lens has an aspheric image-side surface having at least one inflection point, and wherein the following conditional expression is satisfied:
−3.0<f8/f<−0.3 where f: a focal length of the overall optical system of the imaging lens, and f8: a focal length of the eighth lens.

2. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
−10.0<f1/f2<−0.8 where f1: a focal length of the first lens, and f2: a focal length of the second lens.

3. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
0.05<D12/f<0.20 where f: a focal length of the overall optical system of the imaging lens, and D12: a distance along the optical axis between the first lens and the second lens.

4. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
1.0<f2/f3<6.5 where f2: a focal length of the second lens, and f3: a focal length of the third lens.

5. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
0.3<f3/f<3.5 where f: a focal length of the overall optical system of the imaging lens, and f3: a focal length of the third lens.

6. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
0.2<R4r/f<1.0 where f: a focal length of the overall optical system of the imaging lens, and R4r: a curvature radius of an image-side surface of the fourth lens.

7. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
0.08<D45/f<0.20 where f: a focal length of the overall optical system of the imaging lens, and D45: a distance along the optical axis between the fourth lens and the fifth lens.

8. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
0.5<D56/D67<4.0 where D56: a distance along the optical axis between the fifth lens and the sixth lens, and D67: a distance along the optical axis between the sixth lens and the seventh lens.

9. The imaging lens according to claim 1, wherein the following conditional expression is satisfied:
0.2<R8f/f<1.8 where f: a focal length of the overall optical system of the imaging lens, and R8f: a curvature radius of an object-side surface of the eighth lens.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a sectional view of a schematic configuration of an imaging lens in Example 1 of the present invention;

(2) FIG. 2 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 1;

(3) FIG. 3 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 1;

(4) FIG. 4 is a sectional view of a schematic configuration of an imaging lens in Example 2 of the present invention;

(5) FIG. 5 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 4;

(6) FIG. 6 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 4;

(7) FIG. 7 is a sectional view of a schematic configuration of an imaging lens in Example 3 of the present invention;

(8) FIG. 8 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 7;

(9) FIG. 9 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 7;

(10) FIG. 10 is a sectional view of a schematic configuration of an imaging lens in Example 4 of the present invention;

(11) FIG. 11 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 10;

(12) FIG. 12 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 10;

(13) FIG. 13 is a sectional view of a schematic configuration of an imaging lens in Example 5 of the present invention;

(14) FIG. 14 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 13;

(15) FIG. 15 is an aberration diagram a lateral aberration of the imaging lens of FIG. 13;

(16) FIG. 16 is a sectional view of a schematic configuration of an imaging lens in Example 6 of the present invention;

(17) FIG. 17 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 16;

(18) FIG. 18 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 16;

(19) FIG. 19 is a sectional view of a schematic configuration of an imaging lens in Example 7 of the present invention;

(20) FIG. 20 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 19;

(21) FIG. 21 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 19;

(22) FIG. 22 is a sectional view of a schematic configuration of an imaging lens in Example 8 of the present invention;

(23) FIG. 23 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 22;

(24) FIG. 24 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 22;

(25) FIG. 25 is a sectional view of a schematic configuration of an imaging lens in Example 9 of the present invention;

(26) FIG. 26 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 25;

(27) FIG. 27 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 25;

(28) FIG. 28 is a sectional view of a schematic configuration of an imaging lens in Example 10 of the present invention;

(29) FIG. 29 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 28;

(30) FIG. 30 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 28;

(31) FIG. 31 is a sectional view of a schematic configuration of an imaging lens in Example 11 of the present invention;

(32) FIG. 32 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 31;

(33) FIG. 33 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 31;

(34) FIG. 34 is a sectional view of a schematic configuration of an imaging lens in Example 12 of the present invention;

(35) FIG. 35 is an aberration diagram showing spherical aberration, astigmatism, and distortion of the imaging lens of FIG. 34; and

(36) FIG. 36 is an aberration diagram showing a lateral aberration of the imaging lens of FIG. 34.

DETAILED DESCRIPTION OF EMBODIMENTS

(37) Hereunder, referring to the accompanying drawings, an embodiment of the present invention will be fully described.

(38) FIGS. 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31 and 34 are schematic sectional views of the imaging lenses in Examples 1 to 12 according to the embodiment, respectively. Since the imaging lenses in those Examples have the same basic configuration, the lens configuration of the embodiment will be described with reference to the illustrative sectional view of Example 1.

(39) As shown in FIG. 1, the imaging lens according to the present embodiment comprises, in order from an object side to an image side, a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, a third lens L3 with positive refractive power, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8 with negative refractive power. Each lens of the first lens L1 to the eighth lens L8 is arranged with an air gap. A filter 10 is arranged between the eighth lens L8 and an image plane IM of an image sensor. The filter 10 is omissible.

(40) The first lens L1 has a shape that a curvature radius r1 of an object-side surface (=R1f) and a curvature radius r2 of an image-side surface (=R1r) of the first lens are both positive. The first lens L1 is formed in a meniscus shape having the object-side surface being convex in the paraxial region. The shape of the first lens L1 is not limited to the one in the Example 1. The shape of the first lens L1 can be formed in any shape, as long as refractive power of the first lens L1 is negative. Other than the shape of the Example 1, the first lens L1 may be formed in a shape which both the curvature radii r1 and r2 are negative or a shape which the curvature radius r1 is negative and the curvature radius r2 is positive. The lens having the former shape is a meniscus lens having the object-side surface being concave in the paraxial region, and the lens having the latter shape is a biconcave lens in the paraxial region. It is preferable that the curvature radius r1 of the first lens L1 is positive from the standpoint of downsizing the imaging lens.

(41) In the Example 1, an aperture stop ST is disposed between the first lens L1 and the second lens L2. A location of the aperture stop ST is not limited to the one of the Example 1. The aperture stop ST may be disposed on the object side relative to the first lens L1. Otherwise, the aperture stop ST may be disposed between the second lens L2 and the third lens L3, between the third lens L3 and the fourth lens L4, between the fourth lens L4 and the fifth lens L5 or the like.

(42) The second lens L2 has a shape that a curvature radius r4 of an object-side surface and a curvature radius r5 of an image-side surface of the second lens are both positive. The second lens L2 is formed in a meniscus shape having the object-side surface being convex in the paraxial region. The shape of the second lens L2 is not limited to the one in the Example 1. The shape of the second lens L2 can be formed in any shape, as long as refractive power of the second lens L2 is positive. Other than the shape of the Example 1, the second lens L2 may be formed in a shape which both the curvature radii r4 and r5 are negative or a shape which the curvature radius r4 is positive and the curvature radius r5 is negative. The lens having the former shape is a meniscus lens having the object-side surface being concave in the paraxial region, and the lens having the latter shape is a biconvex lens in the paraxial region. It is preferable that the curvature radius r4 of the second lens L2 is positive from the standpoint of downsizing the imaging lens.

(43) The third lens L3 has a shape that a curvature radius r6 of an object-side surface is positive and a curvature radius r7 of an image-side surface is negative. The third lens L3 is formed in a biconvex shape in the paraxial region. The shape of the third lens L3 is not limited to the one in the Example 1. The shape of the third lens L3 can be formed in any shape, as long as refractive power of the third lens L3 is positive. Other than the shape of the Example 1, the third lens L3 may be formed in a shape which both the curvature radii r6 and r7 are positive or a shape which both the curvature radii r6 and r7 are negative. The lens having the former shape is a meniscus lens having an object-side surface being convex in the paraxial region, and the lens having the latter shape is a meniscus lens having the object-side surface being concave in the paraxial region. It is preferable that the curvature radius r6 of the third lens L3 is positive from the standpoint of downsizing the imaging lens.

(44) The fourth lens L4 has positive refractive power. The refractive power of the fourth lens L4 is not limited to the positive refractive power. Examples of the lens configuration which the refractive power of the fourth lens L4 is negative are shown in Examples 5 to 12. The fourth lens L4 is formed in a shape which both a curvature radius r8 of an object-side surface and a curvature radius r9 of an image-side surface (=R4r) are positive. The fourth lens L4 is formed in a meniscus shape having the object-side surface being convex in the paraxial region. In addition, the fourth lens L4 is formed in a shape having a concave surface facing the fifth lens at a peripheral area of the lens. The shape of the fourth lens L4 is not limited to the one in the Example 1. Other than the shape of the Example 1, the fourth lens L4 may be formed in a shape which both the curvature radii r8 and r9 are negative or a shape which the curvature radius r8 is positive and the curvature radius r9 is negative. The lens having the former shape is a meniscus lens having the object-side surface being concave in the paraxial region, and the lens having the latter shape is a biconvex lens in the paraxial region. Furthermore, the shape of the fourth lens L4 may be a biconcave lens in the paraxial region which the curvature radius r8 is negative and the curvature radius r9 is positive. It is preferable that the curvature radius r8 of the fourth lens L4 is positive from the standpoint of downsizing the imaging lens.

(45) The imaging lens according to the present embodiment satisfies the following conditional expression regarding the third lens L3 and the fourth lens L4.
0<f34

(46) where,

(47) f34: a composite focal length of the third lens L3 and the fourth lens L4.

(48) The fifth lens L5 has negative refractive power. The refractive power of the fifth lens L5 is not limited to the negative refractive power. Examples of the lens configuration which the refractive power of the fifth lens L5 is positive are shown in Examples 5 to 8.

(49) The fifth lens L5 is formed in a shape which a curvature radius r10 of an object-side surface is negative and a curvature radius r11 of an image-side surface is positive. The fifth lens L5 is formed in a shape of a biconcave lens in the paraxial region. In addition, the fifth lens L5 is formed in a shape having a concave surface facing the fourth lens L4 at a peripheral area of the lens. Therefore, the fourth lens L4 and the fifth lens L5 are arranged in a manner that the concave surfaces of the fourth lens L4 and the fifth lens L5 are faced each other at the peripheral area of the lens. When the fourth lens L4 and the fifth lens L5 are formed in such a shape, the field curvature and the astigmatism are properly corrected.

(50) The shape of the fifth lens L5 is not limited to the one in the Example 1. Examples 5 to 12 show a shape which both the curvature radii r10 and r11 are positive, namely an example of a meniscus lens having the object-side surface being convex in the paraxial region. Other than such shape, the fifth lens L5 may be formed in a shape which both the curvature radii r10 and r11 are negative or a shape which the curvature radius r10 is positive and the curvature radius r11 is negative. The lens having the former shape is a meniscus lens having the object-side surface being concave in the paraxial region, and the lens having the latter shape is a biconvex lens in the paraxial region. Furthermore, the fifth lens L5 may be formed in a shape having both the curvature radii r10 and r11 of infinity in the paraxial region and refractive power at a peripheral area of the lens.

(51) The imaging lens according to the present embodiment satisfies the following conditional expression regarding the fourth lens L4 and the fifth lens L5.
f45<0

(52) where,

(53) f45: a composite focal length of the fourth lens L4 and the fifth lens L5.

(54) The sixth lens L6 has positive refractive power. The refractive power of the sixth lens L6 is not limited to the positive refractive power. Examples of the lens configuration which the refractive power of the sixth lens L6 is negative are shown in Examples 3, 4, 7, 8 and 11. The sixth lens L6 is formed in a shape which a curvature radius r12 of an object-side surface is positive and a curvature radius r13 of an image-side surface is negative. The sixth lens L6 is formed in a shape of a biconvex lens in the paraxial region. In addition, the shape of the sixth lens L6 is not limited to the one in the Example 1. Examples 3, 4, 7, 8 and 11 show a shape which both the curvature radii r12 and r13 are negative, namely an example of a meniscus lens having the object-side surface being concave in the paraxial region. Other than such shape, the sixth lens L6 may be formed in a shape which both the curvature radii r12 and r13 are positive or a shape which the curvature radius r12 is negative and the curvature radius r13 is positive. The lens having the former shape is a meniscus lens having the object-side surface being convex in the paraxial region, and the lens having the latter shape is a biconcave lens in the paraxial region. Furthermore, the sixth lens L6 may be formed in a shape having both the curvature radii r12 and r13 of infinity in the paraxial region and refractive power at a peripheral area of the lens.

(55) The seventh lens L7 has positive refractive power. The refractive power of the seventh lens L7 is not limited to the positive refractive power. Examples of the lens configuration which the refractive power of the seventh lens L7 is negative are shown in Examples 2, 4, 6, 8, and 10. In addition, an example of the seventh lens L7 which the refractive power becomes zero on the optical axis is shown in the Example 12.

(56) The seventh lens L7 is formed in a shape which a curvature radius r14 of an object-side surface is positive and a curvature radius r15 of an image-side surface is negative. The seventh lens L7 is formed in a shape of a biconvex lens in the paraxial region. The shape of the seventh lens L7 is not limited to the one in the Example 1. Examples 2 and 6 show a shape which both the curvature radii r14 and r15 are negative, namely an example of a meniscus lens having the object-side surface being concave in the paraxial region. Examples 4, 8 and 10 show a shape which the curvature radius r14 is negative and the curvature radius r15 is positive, namely an example of a biconcave lens in the paraxial region. Example 12 is an example of a shape having both curvature radii r14 and r15 of infinity.

(57) Other than such shapes, the seventh lens L7 may be formed in a shape which both the curvature radii r14 and r15 are positive, namely a shape of a meniscus lens having the object-side surface being convex in the paraxial region.

(58) The eighth lens L8 is formed in a shape which a curvature radius r16 of an object-side surface (=R8f) and a curvature radius r17 of an image-side surface (=R8r) are positive. The eighth lens L8 is formed in a shape of a meniscus lens having the object-side surface being convex in the paraxial region. The shape of the eighth lens L8 is not limited to the one in the Example 1. The shape of the eighth lens L8 may be a shape the curvature radius r16 is negative and the curvature radius r17 is positive, namely a shape of a biconcave lens in the paraxial region. Other than such shapes, the eighth lens L8 may be formed in a shape which both the curvature radii r16 and r17 are negative. Furthermore, the eighth lens L8 may be formed in a shape which refractive power of the eighth lens L8 is negative.

(59) Regarding the eighth lens L8, the image-side surface is formed as an aspheric surface having at least one inflection point. Here, the “inflection point” means a point where the positive/negative sign of a curvature changes on the curve, i.e., a point where a direction of curving of the curve on the lens surface changes. The image-side surface of the eighth lens L8 of the imaging lens according to the present embodiment is the aspheric surface having at least one pole. With such shape of the eighth lens L8, an off-axial chromatic aberration of magnification as well as an axial chromatic aberration can be properly corrected, and an incident angle of a light ray emitted from the imaging lens to the image plane IM can be preferably controlled to be within the range of chief ray angle (CRA). According to the imaging lens in the Example 1, both surfaces of the seventh lens L7 and the eighth lens L8 are formed as aspheric surfaces having at least one inflection point. Therefore, aberrations at image periphery can be properly corrected. Depending on the required optical performance and extent of downsizing of the imaging lens, among lens surfaces of the seventh lens L7 and the eighth lens L8, lens surfaces other than the image-side surface of the eighth lens L8 may be formed as an aspheric surface without the inflection point.

(60) The imaging lens according to the present embodiment satisfies the following conditional expression regarding the seventh lens L7 and the eighth lens L8:
f78<0

(61) where

(62) f78: a composite focal length of the seventh lens L7 and the eighth lens L8.

(63) According to the embodiment, the imaging lens satisfies the following conditional expressions (1) to (18):
0.7<R1f/R1r<1.6  (1)
1.0<R1f/R1r<1.6  (1a)
−10.0<f1/f2<−0.8  (2)
−8.0<f1/f2<−0.8  (2a)
−6.0<f1/f2<−1.0  (2b)
0.05<D12/f<0.20  (3)
1.0<f2/f3<6.5  (4)
1.2<f2/f3<5.5  (4a)
1.4<f2/f3<4.5  (4b)
0.3<f3/f<3.5  (5)
0.5<f3/f<2.5  (5a)
0.2<R4r/f<1.0  (6)
0.08<D45/f<0.20  (7)
0.5<D56/D67<4.0  (8)
0.4<T7/T8<3.5  (9)
0.04<D78/f<0.16  (10)
−3.0<f8/f<−0.3  (11)
0.2<R8f/f<1.8  (12)
0.1<R8r/f<0.5  (13)
10<νd1<35  (14)
35<νd2<85  (15)
35<νd3<85  (16)
1.0<TL/f<1.5  (17)
1.2<TL/H max<2.2  (18)

(64) where

(65) f: a focal length of the overall optical system of the imaging lens,

(66) f1: a focal length of the first lens L1,

(67) f2: a focal length of the second lens L2,

(68) f3: a focal length of the third lens L3,

(69) f8: a focal length of the eighth lens L8,

(70) T7: a thickness along the optical axis X of the seventh lens L7,

(71) T8: a thickness along the optical axis X of the eighth lens L8,

(72) νd1: an abbe number at d-ray of the first lens L1,

(73) νd2: an abbe number at d-ray of the second lens L2,

(74) νd3: an abbe number at d-ray of the third lens L3,

(75) R1f: a curvature radius of an object-side surface of the first lens L1,

(76) R1r: a curvature radius of an image-side surface of the first lens L1,

(77) R4r: a curvature radius of an image-side surface of the fourth lens L4,

(78) R8f: a curvature radius of an object-side surface of the eighth lens L8,

(79) R8r: a curvature radius of an image-side surface of the eighth lens L8,

(80) D12: a distance along the optical axis X between the first lens L1 and the second lens L2,

(81) D45: a distance along the optical axis X between the fourth lens L4 and the fifth lens L5,

(82) D56: a distance along the optical axis X between the fifth lens L5 and the sixth lens L6,

(83) D67: a distance along the optical axis X between the sixth lens L6 and the seventh lens L7,

(84) D78: a distance along the optical axis X between the seventh lens L7 and the eighth lens L8,

(85) Hmax: a maximum image height, and

(86) TL: a distance along the optical axis X from an object-side surface of the first lens L1 to an image plane. (Filter 10 is an air-converted distance)

(87) When the fourth lens L4 has positive refractive power as in the lens configurations in Examples 1 to 4, the following conditional expressions (19) and (19a) are further satisfied:
−25.0<f4/f5<−5.0  (19)
−22.0<f4/f5<−7.0  (19a)

(88) where

(89) f4: a focal length of the fourth lens L4, and

(90) f5: a focal length of the fifth lens L5.

(91) When the fourth lens L4 has positive refractive power as in the lens configurations in Examples 1 to 4, the following conditional expressions (20), (20a) and (20b) are further satisfied:
−4.0<f5/f<−0.2  (20)
−3.0<f5/f<−0.2  (20a)
−2.0<f5/f<−0.3.  (20b)

(92) When the sixth lens L6 has positive refractive power as in the lens configurations in Examples 1, 2, 5, 6, 9, 10 and 12, the following conditional expressions (21) and (21a) are further satisfied:
0.3<f6/f<3.0  (21)
0.5<f6/f<2.0  (21a)

(93) where

(94) f6: a focal length of the sixth lens L6.

(95) When the fifth lens L5 is formed in a meniscus shape having an object-side surface being convex in the paraxial region and the sixth lens L6 has the positive refractive power as in the lens configurations in Examples 5, 6, 9, 10 and 12, the following conditional expression (22) is further satisfied:
0.5<f56/f<4.0  (22)

(96) where

(97) f56: a composite focal length of the fifth lens L5 and the sixth lens L6.

(98) When the sixth lens L6 and the seventh lens L7 have negative refractive power as in the lens configurations in Examples 4 and 8, the following conditional expression (23) is further satisfied:
−14.0<f67/f<−2.0  (23)

(99) where

(100) f67: a composite focal length of the sixth lens L6 and the seventh lens L7.

(101) Furthermore, the imaging lens according to the present embodiment satisfies the following conditional expression (24):
f/Dep<2.4  (24)

(102) where

(103) Dep: an entrance pupil diameter of the imaging lens.

(104) It is not necessary to satisfy the above all conditional expressions, and when any one of the conditional expressions is individually satisfied, operational advantage corresponding to each conditional expression can be obtained.

(105) According to the present embodiment, lens surfaces of the respective lenses are formed as aspheric surfaces. An equation that expresses these aspheric surfaces is shown below:

(106) $\begin{array}{cc}Z=\frac{C.Math.H^2}{1+\sqrt{1-\left(1+k\right).Math.C^2.Math.H^2}}+\Sigma \left(\mathrm{An}.Math.H^n\right)& \left[\mathrm{Equation}1\right]\end{array}$

(107) where

(108) Z: a distance in a direction of the optical axis,

(109) H: a distance from the optical axis in a direction perpendicular to the optical axis,

(110) C: a paraxial curvature (=1/r, r: paraxial curvature radius),

(111) k: conic constant, and

(112) An: the nth aspheric coefficient.

(113) Next, examples of the imaging lens according to the present embodiment will be described. In each example, f represents a focal length of the overall optical system of the imaging lens, Fno represents an F-number, ω represents a half field of view. Additionally, i represents a surface number counted from the object side, r represents a paraxial curvature radius, d represents a distance of lenses along the optical axis (surface distance), nd represents a refractive index at a reference wavelength of 588 nm, and νd represents an abbe number at the reference wavelength, respectively. Here, surfaces indicated with surface numbers i affixed with an asterisk (*) are aspheric surfaces.

Example 1

(114) The basic lens data is shown below in Table 1.

(115) TABLE-US-00001 TABLE 1 f = 6.91 mm Fno = 1.9 ω = 33.9° i r d nd νd [mm] ∞ ∞ L1  1* 4.463 0.357 1.6707 19.2 f1 = −18.426  2* 3.174 1.070 3(ST) ∞ −0.472 L2  4* 3.040 0.759 1.5445 56.4 f2 = 12.098  5* 5.147 0.097 L3  6* 3.586 0.835 1.5445 56.4 f3 = 6.265  7* −64.148 0.022 L4  8* 2.724 0.273 1.5348 55.7 f4 = 103.899  9* 2.764 1.014 L5 10* −13.759 0.734 1.6707 19.2 f5 = −6.245 11* 6.151 0.224 L6 12* 22.973 0.603 1.5348 55.7 f6 = 6.809 13* −4.288 0.223 L7 14* 84.904 0.559 1.6707 19.2 f7 = 109.139 15* −529.818 0.430 L8 16* 6.235 0.591 1.5445 56.4 f8 = −5.739 17* 2.012 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.961 (IM) ∞ R1f=4.463 mm R1r=3.174 mm R4r=2.764 mm R8f=6.235 mm R8r=2.012 mm D12=0.598 mm D45=1.014 mm D56=0.224 mm D67=0.223 mm D78=0.430 mm T7=0.559 mm T8=0.591 mm TL=8.718 mm Hmax=4.65 mm Dep=3.606 mm

(116) TABLE-US-00002 TABLE 2 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.985E−02 −1.902E−03 −1.033E−03 1.004E−03 2 0.000E+00 −2.318E−02 −6.132E−03  3.517E−03 −3.093E−03  4 −3.661E+00   4.547E−03 −2.292E−03  3.094E−03 −4.119E−03  5 −1.000E+02   1.083E−02 −4.614E−02  4.721E−02 −2.991E−02  6 −4.879E+00  −2.229E−02  2.230E−02 −2.287E−02 1.896E−02 7 0.000E+00  2.633E−02 −1.959E−02 −1.223E−02 2.473E−02 8 0.000E+00 −2.957E−02  2.902E−02 −6.277E−02 5.859E−02 9 −4.853E+00  −1.671E−02  4.449E−02 −5.636E−02 3.964E−02 10 0.000E+00 −5.010E−02  1.413E−02  1.860E−03 −6.658E−03  11 0.000E+00 −5.418E−02 −2.096E−02  6.020E−02 −6.730E−02  12 2.400E+01 −1.703E−02  3.128E−03 −1.992E−02 1.968E−02 13 2.009E+00  6.809E−02 −5.940E−02  1.043E−02 1.212E−02 14 0.000E+00  9.296E−02 −1.042E−01  3.934E−02 −6.510E−03  15 0.000E+00  5.939E−02 −7.388E−02  3.213E−02 −8.520E−03  16 −2.976E−02  −1.512E−01  3.835E−02 −6.094E−03 9.474E−04 17 −9.794E+00  −7.501E−02  2.500E−02 −5.499E−03 8.384E−04 i A12 A14 A16 A18 A20 1 −3.618E−04 8.265E−05 −1.198E−05 1.008E−06 −3.769E−08 2  2.044E−03 −7.747E−04   1.703E−04 −2.038E−05   1.038E−06 4  2.567E−03 −8.969E−04   1.826E−04 −2.037E−05   1.031E−06 5  1.318E−02 −3.963E−03   7.557E−04 −8.135E−05   3.842E−06 6 −9.432E−03 2.951E−03 −5.833E−04 6.670E−05 −3.205E−06 7 −1.566E−02 5.697E−03 −1.280E−03 1.645E−04 −8.567E−06 8 −2.947E−02 9.010E−03 −1.713E−03 1.998E−04 −1.140E−05 9 −1.525E−02 2.736E−03  8.767E−05 −1.180E−04   1.520E−05 10  5.093E−03 −2.516E−03   9.211E−04 −2.195E−04   2.317E−05 11  4.544E−02 −1.930E−02   5.042E−03 −7.394E−04   4.671E−05 12 −1.049E−02 3.119E−03 −4.666E−04 2.373E−05  8.757E−07 13 −9.763E−03 3.364E−03 −6.223E−04 6.052E−05 −2.419E−06 14 −7.580E−04 5.847E−04 −1.209E−04 1.147E−05 −3.337E−07 15  1.448E−03 −1.557E−04   1.027E−05 −3.713E−07   4.579E−09 16 −1.420E−04 1.454E−05 −8.865E−07 3.662E−08 −1.277E−09 17 −8.925E−05 6.378E−06 −2.875E−07 7.382E−09 −8.692E−11

(117) The values of the respective conditional expressions are as follows: R1f/R1r=1.4 f1/f2=−1.5 D12/f=0.09 f2/f3=1.9 f3/f=0.9 R4r/f=0.4 D45/f=0.15 D56/D67=1.0 T7/T8=0.9 D78/f=0.06 f8/f=−0.8 R8f/f=0.9 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.9 f/Dep=1.9 f4/f5=−16.6 f5/f=−0.9 f6/f=1.0

(118) Accordingly, the imaging lens according to the Example 1 satisfies the above-described conditional expressions.

(119) FIG. 2 shows spherical aberration (mm), astigmatism (mm), and distortion (%) of the imaging lens in Example 1, respectively. The astigmatism diagram and distortion diagram show aberrations at the reference wavelength (588 nm). Furthermore, in the astigmatism diagram, a sagittal image surface (S) and a tangential image surface (T) are shown respectively (same for FIGS. 5, 8, 11, 14, 17, 20, 23, 26, 29, 32 and 35). FIG. 3 shows a lateral aberration corresponding to a ratio H of each image height to the maximum image height Hmax (hereinafter referred to as “image height ratio H”), which is divided into a tangential direction and a sagittal direction (same for FIGS. 6, 9, 12, 15, 18, 21, 24, 27, 30, 33 and 36). As shown in FIGS. 2 and 3, according to the imaging lens of the Example 1, aberrations can be properly corrected.

Example 2

(120) The basic lens data is shown below in Table 3.

(121) TABLE-US-00003 TABLE 3 f = 6.94 mm Fno = 1.9 ω = 33.8° i r d nd νd [mm] ∞ ∞ L1  1* 4.460 0.362 1.6707 19.2 f1 = −18.562  2* 3.177 1.067 3(ST) ∞ −0.472 L2  4* 3.024 0.770 1.5445 56.4 f2 = 11.954  5* 5.142 0.101 L3  6* 3.565 0.843 1.5445 56.4 f3 = 6.220  7* −62.067 0.023 L4  8* 2.718 0.274 1.5348 55.7 f4 = 100.389  9* 2.762 1.030 L5 10* −14.541 0.739 1.6707 19.2 f5 = −6.354 11* 6.152 0.227 L6 12* 22.545 0.602 1.5348 55.7 f6 = 6.773 13* −4.276 0.223 L7 14* −80.300 0.559 1.6707 19.2 f7 = −121.731 15* −4870.522 0.428 L8 16* 6.229 0.606 1.5445 56.4 f8 = −5.726 17* 2.006 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.861 (IM) ∞ R1f=4.460 mm R1r=3.177 mm R4r=2.762 mm R8f=6.229 mm R8r=2.006 mm D12=0.595 mm D45=1.030 mm D56=0.227 mm D67=0.223 mm D78=0.428 mm T7=0.559 mm T8=0.606 mm TL=8.682 mm Hmax=4.65 mm Dep=3.610 mm

(122) TABLE-US-00004 TABLE 4 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.988E−02 −1.906E−03 −1.034E−03 1.004E−03 2 0.000E+00 −2.316E−02 −6.128E−03  3.517E−03 −3.092E−03  4 −3.654E+00   4.564E−03 −2.288E−03  3.095E−03 −4.119E−03  5 −1.000E+02   1.081E−02 −4.615E−02  4.721E−02 −2.991E−02  6 −4.863E+00  −2.226E−02  2.231E−02 −2.287E−02 1.896E−02 7 0.000E+00  2.628E−02 −1.960E−02 −1.223E−02 2.472E−02 8 0.000E+00 −2.954E−02  2.902E−02 −6.277E−02 5.859E−02 9 −4.880E+00  −1.673E−02  4.451E−02 −5.635E−02 3.964E−02 10 0.000E+00 −5.018E−02  1.409E−02  1.841E−03 −6.667E−03  11 0.000E+00 −5.408E−02 −2.097E−02  6.020E−02 −6.730E−02  12 2.400E+01 −1.744E−02  3.062E−03 −1.992E−02 1.968E−02 13 1.985E+00  6.835E−02 −5.936E−02  1.043E−02 1.212E−02 14 0.000E+00  9.310E−02 −1.043E−01  3.932E−02 −6.511E−03  15 0.000E+00  5.926E−02 −7.386E−02  3.213E−02 −8.520E−03  16 2.896E−03 −1.512E−01  3.833E−02 −6.095E−03 9.475E−04 17 −1.072E+01  −7.497E−02  2.501E−02 −5.499E−03 8.384E−04 i A12 A14 A16 A18 A20 1 −3.618E−04 8.266E−05 −1.198E−05 1.008E−06 −3.753E−08 2  2.044E−03 −7.747E−04   1.703E−04 −2.038E−05   1.038E−06 4  2.567E−03 −8.969E−04   1.826E−04 −2.037E−05   1.031E−06 5  1.318E−02 −3.963E−03   7.557E−04 −8.135E−05   3.841E−06 6 −9.432E−03 2.951E−03 −5.833E−04 6.669E−05 −3.208E−06 7 −1.566E−02 5.697E−03 −1.280E−03 1.646E−04 −8.556E−06 8 −2.947E−02 9.011E−03 −1.713E−03 1.999E−04 −1.134E−05 9 −1.525E−02 2.736E−03  8.753E−05 −1.181E−04   1.515E−05 10  5.089E−03 −2.518E−03   9.206E−04 −2.197E−04   2.311E−05 11  4.544E−02 −1.930E−02   5.042E−03 −7.394E−04   4.671E−05 12 −1.049E−02 3.120E−03 −4.666E−04 2.374E−05  8.791E−07 13 −9.763E−03 3.364E−03 −6.224E−04 6.052E−05 −2.421E−06 14 −7.578E−04 5.848E−04 −1.209E−04 1.148E−05 −3.325E−07 15  1.448E−03 −1.557E−04   1.027E−05 −3.713E−07   4.572E−09 16 −1.420E−04 1.454E−05 −8.866E−07 3.659E−08 −1.281E−09 17 −8.925E−05 6.378E−06 −2.876E−07 7.381E−09 −8.694E−11

(123) The values of the respective conditional expressions are as follows: R1f/R1r=1.4 f1/f2=−1.6 D12/f=0.09 f2/f3=1.9 f3/f=0.9 R4r/f=0.4 D45/f=0.15 D56/D67=1.0 T7/T8=0.9 D78/f=0.06 f8/f=−0.8 R8f/f=0.9 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.9 f/Dep=1.9 f4/f5=−15.8 f5/f=−0.9 f6/f=1.0

(124) Accordingly, the imaging lens according to the Example 2 satisfies the above-described conditional expressions.

(125) FIG. 5 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 6 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 5 and 6, according to the imaging lens of the Example 2, aberrations can be properly corrected.

Example 3

(126) The basic lens data is shown below in Table 5.

(127) TABLE-US-00005 TABLE 5 f = 8.02 mm Fno = 2.3 ω = 30.1° i r d nd νd [mm] ∞ ∞ L1  1* 4.724 0.506 1.6707 19.2 f1 = −17.674  2* 3.233 1.225 3(ST) ∞ −0.595 L2  4* 2.956 0.755 1.5445 56.4 f2 = 11.645  5* 5.038 0.103 L3  6* 3.464 0.884 1.5445 56.4 f3 = 6.027  7* −56.675 0.063 L4  8* 2.824 0.291 1.5348 55.7 f4 = 139.894  9* 2.829 1.079 L5 10* −13.878 0.827 1.6707 19.2 f5 = −8.296 11* 9.511 0.315 L6 12* −14.559 0.413 1.5348 55.7 f6 = −104.291 13* −19.897 0.323 L7 14* 36.905 0.642 1.6707 19.2 f7 = 45.846 15* −183.124 0.541 L8 16* 3.951 0.578 1.5348 55.7 f8 = −9.975 17* 2.154 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.889 (IM) ∞ R1f=4.724 mm R1r=3.233 mm R4r=2.829 mm R8f=3.951 mm R8r=2.154 mm D12=0.630 mm D45=1.079 mm D56=0.315 mm D67=0.323 mm D78=0.541 mm T7=0.642 mm T8=0.578 mm TL=9.277 mm Hmax=4.65 mm Dep=3.453 mm

(128) TABLE-US-00006 TABLE 6 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.856E−02 −1.948E−03 −1.073E−03 1.009E−03 2 0.000E+00 −2.324E−02 −5.969E−03  3.558E−03 −3.094E−03  4 −4.242E+00   1.172E−02 −1.644E−03  2.424E−03 −4.044E−03  5 −1.000E+02  −5.481E−03 −4.383E−02  4.742E−02 −3.017E−02  6 −1.664E+01  −3.171E−02  9.818E−03 −2.148E−02 2.005E−02 7 0.000E+00 −6.902E−03 −1.634E−02 −1.202E−02 2.527E−02 8 0.000E+00  2.149E−03  2.835E−02 −6.321E−02 5.755E−02 9 9.291E−01  3.114E−03  4.310E−02 −5.755E−02 3.900E−02 10 0.000E+00 −5.757E−02  1.692E−02  1.598E−03 −7.407E−03  11 0.000E+00 −6.120E−02 −1.738E−02  5.910E−02 −6.730E−02  12 2.400E+01 −4.111E−02  3.496E−03 −1.888E−02 2.020E−02 13 4.894E+01  2.980E−02 −5.571E−02  1.116E−02 1.206E−02 14 0.000E+00  8.850E−02 −1.013E−01  3.931E−02 −6.511E−03  15 0.000E+00  6.467E−02 −7.227E−02  3.210E−02 −8.545E−03  16 −7.855E−01  −1.466E−01  3.656E−02 −6.203E−03 9.507E−04 17 −1.008E+01  −9.007E−02  2.776E−02 −5.750E−03 8.345E−04 i A12 A14 A16 A18 A20 1 −3.628E−04 8.220E−05 −1.186E−05 1.021E−06 −3.941E−08 2  2.045E−03 −7.752E−04   1.701E−04 −2.041E−05   1.059E−06 4  2.606E−03 −8.935E−04   1.814E−04 −2.111E−05   1.201E−06 5  1.325E−02 −3.901E−03   7.532E−04 −8.850E−05   4.864E−06 6 −9.486E−03 2.891E−03 −5.789E−04 7.010E−05 −4.181E−06 7 −1.578E−02 5.503E−03 −1.270E−03 2.127E−04 −2.019E−05 8 −2.937E−02 9.317E−03 −1.658E−03 1.161E−04  2.034E−06 9 −1.548E−02 2.767E−03  2.514E−04 −3.201E−06  −4.949E−05 10  4.907E−03 −2.556E−03   1.104E−03 −2.212E−04  −1.581E−06 11  4.549E−02 −1.929E−02   5.046E−03 −7.402E−04   4.582E−05 12 −1.041E−02 3.121E−03 −4.716E−04 2.178E−05  6.515E−07 13 −9.774E−03 3.362E−03 −6.224E−04 6.053E−05 −2.437E−06 14 −7.570E−04 5.814E−04 −1.211E−04 1.147E−05 −3.411E−07 15  1.445E−03 −1.560E−04   1.024E−05 −3.686E−07   6.308E−09 16 −1.410E−04 1.466E−05 −8.741E−07 3.641E−08 −1.181E−09 17 −8.779E−05 6.390E−06 −2.903E−07 7.152E−09 −7.421E−11

(129) The values of the respective conditional expressions are as follows: R1f/R1r=1.5 f1/f2=−1.5 D12/f=0.08 f2/f3=1.9 f3/f=0.8 R4r/f=0.4 D45/f=0.13 D56/D67=1.0 T7/T8=1.1 D78/f=0.07 f8/f=−1.2 R8f/f=0.5 R8r/f=0.3 TL/f=1.2 TL/Hmax=2.0 f/Dep=2.3 f4/f5=−16.9 f5/f=−1.0

(130) Accordingly, the imaging lens according to the Example 3 satisfies the above-described conditional expressions.

(131) FIG. 8 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 9 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 8 and 9, according to the imaging lens of the Example 3, aberrations can be properly corrected.

Example 4

(132) The basic lens data is shown below in Table 7.

(133) TABLE-US-00007 TABLE 7 f = 8.03 mm Fno = 2.3 ω = 30.1° i r d nd νd [mm] ∞ ∞ L1  1* 4.721 0.511 1.6707 19.2 f1 = −17.730  2* 3.232 1.255 3(ST) ∞ −0.608 L2  4* 2.958 0.768 1.5445 56.4 f2 = 11.603  5* 5.052 0.109 L3  6* 3.457 0.905 1.5445 56.4 f3 = 5.993  7* −52.812 0.067 L4  8* 2.839 0.290 1.5348 55.7 f4 = 102.797  9* 2.887 1.081 L5 10* −12.934 0.762 1.6707 19.2 f5 = −8.893 11* 11.333 0.317 L6 12* −14.097 0.412 1.5348 55.7 f6 = −102.868 13* −19.146 0.341 L7 14* −9161.188 0.641 1.6707 19.2 f7 = −107.622 15* 72.762 0.513 L8 16* 3.733 0.601 1.5348 55.7 f8 = −11.288 17* 2.177 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.831 (IM) ∞ f67=−52.157 mm R1f=4.721 mm R1r=3.232 mm R4r=2.887 mm R8f=3.733 mm R8r=2.177 mm D12=0.647 mm D45=1.081 mm D56=0.317 mm D67=0.341 mm D78=0.513 mm T7=0.641 mm T8=0.601 mm TL=9.235 mm Hmax=4.65 mm Dep=3.465 mm

(134) TABLE-US-00008 TABLE 8 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.857E−02 −1.953E−03 −1.073E−03 1.009E−03 2 0.000E+00 −2.322E−02 −5.964E−03  3.559E−03 −3.094E−03  4 −4.222E+00   1.175E−02 −1.640E−03  2.425E−03 −4.044E−03  5 −1.000E+02  −5.478E−03 −4.383E−02  4.742E−02 −3.017E−02  6 −1.662E+01  −3.170E−02  9.821E−03 −2.147E−02 2.005E−02 7 0.000E+00 −6.909E−03 −1.633E−02 −1.202E−02 2.527E−02 8 0.000E+00  2.168E−03  2.838E−02 −6.319E−02 5.756E−02 9 9.275E−01  3.110E−03  4.308E−02 −5.755E−02 3.900E−02 10 0.000E+00 −5.839E−02  1.707E−02  1.682E−03 −7.393E−03  11 0.000E+00 −6.018E−02 −1.738E−02  5.909E−02 −6.730E−02  12 2.400E+01 −4.194E−02  3.431E−03 −1.889E−02 2.020E−02 13 3.824E+01  3.058E−02 −5.563E−02  1.116E−02 1.206E−02 14 0.000E+00  8.993E−02 −1.015E−01  3.929E−02 −6.512E−03  15 0.000E+00  6.415E−02 −7.227E−02  3.210E−02 −8.544E−03  16 −7.442E−01  −1.465E−01  3.656E−02 −6.204E−03 9.506E−04 17 −1.249E+01  −9.026E−02  2.777E−02 −5.748E−03 8.346E−04 i A12 A14 A16 A18 A20 1 −3.628E−04 8.222E−05 −1.186E−05 1.021E−06 −3.962E−08 2  2.045E−03 −7.752E−04   1.701E−04 −2.041E−05   1.060E−06 4  2.606E−03 −8.935E−04   1.814E−04 −2.112E−05   1.198E−06 5  1.325E−02 −3.901E−03   7.532E−04 −8.849E−05   4.869E−06 6 −9.486E−03 2.891E−03 −5.789E−04 7.012E−05 −4.172E−06 7 −1.578E−02 5.503E−03 −1.270E−03 2.127E−04 −2.021E−05 8 −2.937E−02 9.320E−03 −1.656E−03 1.166E−04  2.119E−06 9 −1.548E−02 2.769E−03  2.522E−04 −2.590E−06  −4.883E−05 10  4.902E−03 −2.562E−03   1.101E−03 −2.225E−04  −1.916E−06 11  4.549E−02 −1.929E−02   5.046E−03 −7.402E−04   4.581E−05 12 −1.041E−02 3.121E−03 −4.716E−04 2.180E−05  6.610E−07 13 −9.774E−03 3.362E−03 −6.224E−04 6.052E−05 −2.439E−06 14 −7.571E−04 5.814E−04 −1.211E−04 1.147E−05 −3.409E−07 15  1.445E−03 −1.560E−04   1.024E−05 −3.686E−07   6.297E−09 16 −1.410E−04 1.466E−05 −8.741E−07 3.641E−08 −1.182E−09 17 −8.779E−05 6.390E−06 −2.903E−07 7.146E−09 −7.495E−11

(135) The values of the respective conditional expressions are as follows: R1f/R1r=1.5 f1/f2=−1.5 D12/f=0.08 f2/f3=1.9 f3/f=0.7 R4r/f=0.4 D45/f=0.13 D56/D67=0.9 T7/T8=1.1 D78/f=0.06 f8/f=−1.4 R8f/f=0.5 R8r/f=0.3 TL/f=1.2 TL/Hmax=2.0 f/Dep=2.3 f4/f5=−11.6 f5/f=−1.1 f67/f=−6.5

(136) Accordingly, the imaging lens according to the Example 4 satisfies the above-described conditional expressions.

(137) FIG. 11 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 12 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 11 and 12, according to the imaging lens of the Example 4, aberrations can be properly corrected.

Example 5

(138) The basic lens data is shown below in Table 9.

(139) TABLE-US-00009 TABLE 9 f = 5.64 mm Fno = 1.4 ω = 38.5° i r d nd νd [mm] ∞ ∞ L1  1* 3.598 0.309 1.6707 19.2 f1 = −33.507  2* 2.995 0.841 3(ST) ∞ −0.404 L2  4* 3.164 0.726 1.5445 56.4 f2 = 13.258  5* 5.176 0.107 L3  6* 3.233 0.807 1.5445 56.4 f3 = 5.912  7* −676.604 0.045 L4  8* 3.763 0.250 1.6707 19.2 f4 = −12.103  9* 2.502 0.749 L5 10* 5.836 0.462 1.6503 21.5 f5 = 101.092 11* 6.205 0.447 L6 12* 18.614 0.567 1.5348 55.7 f6 = 7.241 13* −4.838 0.210 L7 14* 217.931 0.518 1.6707 19.2 f7 = 100.205 15* −97.092 0.374 L8 16* 8.518 0.454 1.5445 56.4 f8 = −4.477 17* 1.859 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.667 (IM) ∞ f56=7.009 mm R1f=3.598 mm R1r=2.995 mm R4r=2.502 mm R8f=8.518 mm R8r=1.859 mm D12=0.436 mm D45=0.749 mm D56=0.447 mm D67=0.210 mm D78=0.374 mm T7=0.518 mm T8=0.454 mm TL=7.567 mm Hmax=4.48 mm Dep=3.998 mm

(140) TABLE-US-00010 TABLE 10 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.948E−02 −1.727E−03 −1.073E−03 9.994E−04 2 0.000E+00 −2.318E−02 −6.038E−03  3.496E−03 −3.106E−03  4 −2.987E+00   5.632E−03 −4.058E−03  2.882E−03 −4.025E−03  5 −1.000E+02   1.135E−02 −4.621E−02  4.730E−02 −3.002E−02  6 −7.382E+00  −2.371E−02  2.384E−02 −2.266E−02 1.922E−02 7 0.000E+00  2.790E−02 −2.096E−02 −1.228E−02 2.471E−02 8 0.000E+00 −3.284E−02  3.089E−02 −6.451E−02 5.847E−02 9 −5.081E+00  −2.095E−02  4.359E−02 −5.630E−02 3.963E−02 10 0.000E+00 −4.855E−02  1.492E−02  9.433E−04 −5.725E−03  11 0.000E+00 −4.440E−02 −2.247E−02  6.009E−02 −6.733E−02  12 2.400E+01 −1.154E−03 −1.129E−03 −1.910E−02 1.963E−02 13 2.259E+00  6.658E−02 −5.792E−02  9.878E−03 1.220E−02 14 0.000E+00  8.386E−02 −9.813E−02  3.910E−02 −6.546E−03  15 0.000E+00  6.923E−02 −7.426E−02  3.214E−02 −8.517E−03  16 1.514E+00 −1.338E−01  3.607E−02 −6.174E−03 9.889E−04 17 −6.675E+00  −7.322E−02  2.456E−02 −5.459E−03 8.383E−04 i A12 A14 A16 A18 A20 1 −3.594E−04 8.200E−05 −1.191E−05 1.003E−06 −3.677E−08 2  2.043E−03 −7.750E−04   1.704E−04 −2.033E−05   1.025E−06 4  2.565E−03 −9.007E−04   1.826E−04 −2.017E−05   9.617E−07 5  1.323E−02 −3.969E−03   7.510E−04 −7.980E−05   3.628E−06 6 −9.819E−03 3.283E−03 −7.352E−04 1.003E−04 −6.211E−06 7 −1.564E−02 5.683E−03 −1.271E−03 1.605E−04 −8.662E−06 8 −2.943E−02 9.068E−03 −1.725E−03 1.864E−04 −8.603E−06 9 −1.528E−02 2.728E−03  9.171E−05 −1.199E−04   1.451E−05 10  4.719E−03 −2.668E−03   1.014E−03 −2.224E−04   2.050E−05 11  4.542E−02 −1.931E−02   5.043E−03 −7.405E−04   4.678E−05 12 −1.047E−02 3.098E−03 −4.707E−04 2.511E−05  6.854E−07 13 −9.776E−03 3.367E−03 −6.234E−04 6.040E−05 −2.411E−06 14 −7.688E−04 5.865E−04 −1.186E−04 1.156E−05 −4.640E−07 15  1.447E−03 −1.559E−04   1.025E−05 −3.704E−07   5.501E−09 16 −1.411E−04 1.439E−05 −9.183E−07 3.265E−08 −4.941E−10 17 −8.924E−05 6.367E−06 −2.866E−07 7.301E−09 −7.963E−11

(141) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−2.5 D12/f=0.08 f2/f3=2.2 f3/f=1.0 R4r/f=0.4 D45/f=0.13 D56/D67=2.1 T7/T8=1.1 D78/f=0.07 f8/f=−0.8 R8f/f=1.5 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.7 f/Dep=1.4 f6/f=1.3 f56/f=1.2

(142) Accordingly, the imaging lens according to the Example 5 satisfies the above-described conditional expressions.

(143) FIG. 14 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 15 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 14 and 15, according to the imaging lens of the Example 5, aberrations can be properly corrected.

Example 6

(144) The basic lens data is shown below in Table 11.

(145) TABLE-US-00011 TABLE 11 f = 5.69 mm Fno = 1.4 ω = 39.0° i r d nd νd [mm] ∞ ∞ L1  1* 3.569 0.327 1.6707 19.2 f1 = −35.142  2* 2.986 0.854 3(ST) ∞ −0.403 L2  4* 3.171 0.714 1.5445 56.4 f2 = 13.140  5* 5.245 0.102 L3  6* 3.245 0.826 1.5445 56.4 f3 = 5.920  7* −446.171 0.043 L4  8* 3.708 0.250 1.6707 19.2 f4 = −12.641  9* 2.510 0.717 L5 10* 6.092 0.435 1.6503 21.5 f5 = 100.984 11* 6.526 0.476 L6 12* 18.534 0.535 1.5348 55.7 f6 = 7.190 13* −4.803 0.219 L7 14* −51.903 0.522 1.6707 19.2 f7 = −97.803 15* −249.567 0.377 L8 16* 8.124 0.444 1.5445 56.4 f8 = −4.634 17* 1.888 0.289 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.668 (IM) ∞ f56=6.943 mm R1f=3.569 mm R1r=2.986 mm R4r=2.510 mm R8f=8.124 mm R8r=1.888 mm D12=0.451 mm D45=0.717 mm D56=0.476 mm D67=0.219 mm D78=0.377 mm T7=0.522 mm T8=0.444 mm TL=7.532 mm Hmax=4.60 mm Dep=4.020 mm

(146) TABLE-US-00012 TABLE 12 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.990E−02 −1.703E−03 −1.065E−03 9.999E−04 2 0.000E+00 −2.301E−02 −5.993E−03  3.499E−03 −3.104E−03  4 −3.623E+00   6.550E−03 −3.665E−03  2.844E−03 −4.051E−03  5 −1.000E+02   1.139E−02 −4.598E−02  4.735E−02 −3.003E−02  6 −7.378E+00  −2.184E−02  2.345E−02 −2.256E−02 1.923E−02 7 0.000E+00  2.607E−02 −2.064E−02 −1.199E−02 2.474E−02 8 0.000E+00 −3.221E−02  3.262E−02 −6.462E−02 5.845E−02 9 −5.551E+00  −1.519E−02  4.378E−02 −5.636E−02 3.970E−02 10 0.000E+00 −4.502E−02  1.405E−02  7.548E−04 −5.688E−03  11 0.000E+00 −3.994E−02 −2.360E−02  6.026E−02 −6.730E−02  12 2.400E+01 −1.436E−03 −6.798E−04 −1.903E−02 1.959E−02 13 2.283E+00  6.753E−02 −5.777E−02  9.722E−03 1.220E−02 14 0.000E+00  8.547E−02 −9.852E−02  3.914E−02 −6.531E−03  15 0.000E+00  6.863E−02 −7.404E−02  3.215E−02 −8.519E−03  16 1.480E+00 −1.336E−01  3.613E−02 −6.180E−03 9.884E−04 17 −7.194E+00  −7.302E−02  2.457E−02 −5.452E−03 8.384E−04 i A12 A14 A16 A18 A20 1 −3.593E−04 8.199E−05 −1.191E−05 1.005E−06 −3.759E−08 2  2.044E−03 −7.751E−04   1.704E−04 −2.033E−05   1.024E−06 4  2.570E−03 −8.986E−04   1.826E−04 −2.031E−05   9.699E−07 5  1.323E−02 −3.968E−03   7.510E−04 −7.980E−05   3.622E−06 6 −9.816E−03 3.283E−03 −7.353E−04 1.003E−04 −6.217E−06 7 −1.565E−02 5.683E−03 −1.271E−03 1.603E−04 −8.622E−06 8 −2.943E−02 9.065E−03 −1.725E−03 1.866E−04 −8.605E−06 9 −1.529E−02 2.717E−03  9.145E−05 −1.184E−04   1.448E−05 10  4.736E−03 −2.669E−03   1.013E−03 −2.224E−04   2.062E−05 11  4.540E−02 −1.931E−02   5.044E−03 −7.400E−04   4.676E−05 12 −1.048E−02 3.098E−03 −4.704E−04 2.518E−05  7.033E−07 13 −9.774E−03 3.368E−03 −6.233E−04 6.041E−05 −2.417E−06 14 −7.665E−04 5.864E−04 −1.186E−04 1.155E−05 −4.646E−07 15  1.447E−03 −1.560E−04   1.025E−05 −3.702E−07   5.482E−09 16 −1.411E−04 1.439E−05 −9.181E−07 3.266E−08 −4.956E−10 17 −8.926E−05 6.366E−06 −2.866E−07 7.302E−09 −7.956E−11

(147) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−2.7 D12/f=0.08 f2/f3=2.2 f3/f=1.0 R4r/f=0.4 D45/f=0.13 D56/D67=2.2 T7/T8=1.2 D78/f=0.07 f8/f=−0.8 R8f/f=1.4 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.6 f/Dep=1.4 f6/f=1.3 f56/f=1.2

(148) Accordingly, the imaging lens according to the Example 6 satisfies the above-described conditional expressions.

(149) FIG. 17 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 18 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 17 and 18, according to the imaging lens of the Example 6, aberrations can be properly corrected.

Example 7

(150) The basic lens data is shown below in Table 13.

(151) TABLE-US-00013 TABLE 13 f = 6.29 mm Fno = 1.8 ω = 35.5° i r d nd νd [mm] ∞ ∞ L1  1* 3.535 0.358 1.6707 19.2 f1 = −38.714  2* 2.985 0.853 3(ST) ∞ −0.389 L2  4* 3.094 0.709 1.5445 56.4 f2 = 12.229  5* 5.314 0.072 L3  6* 3.132 0.916 1.5445 56.4 f3 = 5.691  7* −263.456 0.014 L4  8* 3.670 0.250 1.6707 19.2 f4 = −13.555  9* 2.543 0.881 L5 10* 16.842 0.396 1.6503 21.5 f5 = 113.857 11* 21.598 0.359 L6 12* −18.277 0.300 1.5348 55.7 f6 = −99.854 13* −27.946 0.210 L7 14* 12.335 0.650 1.6707 19.2 f7 = 18.115 15* −796.136 0.478 L8 16* 4.883 0.482 1.5445 56.4 f8 = −5.770 17* 1.845 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.713 (IM) ∞ R1f=3.535 mm R1r=2.985 mm R4r=2.543 mm R8f=4.883 mm R8r=1.845 mm D12=0.464 mm D45=0.881 mm D56=0.359 mm D67=0.210 mm D78=0.478 mm T7=0.650 mm T8=0.482 mm TL=7.689 mm Hmax=4.48 mm Dep=3.424 mm

(152) TABLE-US-00014 TABLE 14 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.977E−02 −1.720E−03 −1.113E−03 9.964E−04 2 0.000E+00 −2.292E−02 −6.076E−03  3.509E−03 −3.110E−03  4 −2.744E+00   7.156E−03 −4.365E−03  3.127E−03 −4.035E−03  5 −1.000E+02   1.264E−02 −4.618E−02  4.729E−02 −2.989E−02  6 −6.332E+00  −2.181E−02  2.427E−02 −2.283E−02 1.897E−02 7 0.000E+00  2.398E−02 −2.053E−02 −1.212E−02 2.477E−02 8 0.000E+00 −3.070E−02  3.175E−02 −6.400E−02 5.858E−02 9 −4.281E+00  −1.710E−02  4.544E−02 −5.586E−02 3.961E−02 10 0.000E+00 −4.101E−02  1.291E−02  5.504E−04 −5.734E−03  11 0.000E+00 −3.170E−02 −2.466E−02  5.981E−02 −6.729E−02  12 0.000E+00 −1.129E−02  1.650E−04 −1.935E−02 1.965E−02 13 0.000E+00  2.916E−02 −5.543E−02  1.044E−02 1.225E−02 14 0.000E+00  7.378E−02 −9.799E−02  3.939E−02 −6.552E−03  15 0.000E+00  6.938E−02 −7.390E−02  3.208E−02 −8.522E−03  16 −3.491E+00  −1.399E−01  3.585E−02 −6.161E−03 9.909E−04 17 −7.203E+00  −8.144E−02  2.526E−02 −5.474E−03 8.373E−04 i A12 A14 A16 A18 A20 1 −3.595E−04 8.184E−05 −1.186E−05 1.029E−06 −3.923E−08 2  2.043E−03 −7.757E−04   1.706E−04 −2.031E−05   1.029E−06 4  2.567E−03 −8.999E−04   1.816E−04 −2.046E−05   1.068E−06 5  1.317E−02 −3.966E−03   7.542E−04 −8.154E−05   3.911E−06 6 −9.435E−03 2.935E−03 −5.806E−04 6.887E−05 −4.103E−06 7 −1.563E−02 5.688E−03 −1.268E−03 1.598E−04 −9.812E−06 8 −2.942E−02 9.078E−03 −1.725E−03 1.846E−04 −9.067E−06 9 −1.526E−02 2.739E−03  9.482E−05 −1.202E−04   1.417E−05 10  4.722E−03 −2.657E−03   1.019E−03 −2.215E−04   1.977E−05 11  4.543E−02 −1.930E−02   5.043E−03 −7.406E−04   4.685E−05 12 −1.044E−02 3.104E−03 −4.724E−04 2.461E−05  7.088E−07 13 −9.783E−03 3.365E−03 −6.238E−04 6.037E−05 −2.396E−06 14 −7.740E−04 5.850E−04 −1.187E−04 1.157E−05 −4.529E−07 15  1.447E−03 −1.560E−04   1.025E−05 −3.700E−07   5.596E−09 16 −1.410E−04 1.439E−05 −9.185E−07 3.259E−08 −4.961E−10 17 −8.927E−05 6.366E−06 −2.865E−07 7.247E−09 −7.625E−11

(153) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−3.2 D12/f=0.07 f2/f3=2.1 f3/f=0.9 R4r/f=0.4 D45/f=0.14 D56/D67=1.7 T7/T8=1.3 D78/f=0.08 f8/f=−0.9 R8f/f=0.8 R8r/f=0.3 TL/f=1.2 TL/Hmax=1.7 f/Dep=1.8

(154) Accordingly, the imaging lens according to the Example 7 satisfies the above-described conditional expressions.

(155) FIG. 20 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 21 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 20 and 21, according to the imaging lens of the Example 7, aberrations can be properly corrected.

Example 8

(156) The basic lens data is shown below in Table 15.

(157) TABLE-US-00015 TABLE 15 f = 6.61 mm Fno = 1.9 ω = 34.8° i r d nd νd [mm] ∞ ∞ L1  1* 3.511 0.398 1.6707 19.2 f1 = −41.926  2* 2.980 0.836 3(ST) ∞ −0.376 L2  4* 3.073 0.757 1.5445 56.4 f2 = 11.966  5* 5.313 0.061 L3  6* 3.107 0.943 1.5445 56.4 f3 = 5.648  7* −265.412 0.026 L4  8* 3.607 0.250 1.6707 19.2 f4 = −14.050  9* 2.536 0.909 L5 10* 15.986 0.521 1.6503 21.5 f5 = 80.390 11* 22.731 0.386 L6 12* −18.398 0.331 1.5348 55.7 f6 = −100.528 13* −28.144 0.257 L7 14* −413.646 0.657 1.6707 19.2 f7 = −104.039 15* 83.999 0.390 L8 16* 4.478 0.500 1.5445 56.4 f8 = −6.327 17* 1.870 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.531 (IM) ∞ f67=−50.825 mm R1f=3.511 mm R1r=2.980 mm R4r=2.536 mm R8f=4.478 mm R8r=1.870 mm D12=0.460 mm D45=0.909 mm D56=0.386 mm D67=0.257 mm D78=0.390 mm T7=0.657 mm T8=0.500 mm TL=7.816 mm Hmax=4.60 mm Dep=3.489 mm

(158) TABLE-US-00016 TABLE 16 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.966E−02 −1.733E−03 −1.116E−03 9.966E−04 2 0.000E+00 −2.298E−02 −6.102E−03  3.512E−03 −3.104E−03  4 −2.544E+00   7.875E−03 −3.746E−03  2.936E−03 −4.121E−03  5 −1.000E+02   7.204E−03 −4.595E−02  4.705E−02 −3.010E−02  6 −8.194E+00  −2.531E−02  2.119E−02 −2.369E−02 1.966E−02 7 0.000E+00  2.605E−03 −1.370E−02 −1.113E−02 2.406E−02 8 0.000E+00 −4.244E−02  3.816E−02 −6.352E−02 5.819E−02 9 −4.474E+00  −1.379E−02  4.613E−02 −5.579E−02 3.937E−02 10 0.000E+00 −2.918E−02  7.880E−03  5.528E−04 −5.484E−03  11 0.000E+00 −2.281E−02 −2.799E−02  6.022E−02 −6.733E−02  12 0.000E+00 −3.316E−02  3.677E−03 −1.900E−02 1.944E−02 13 0.000E+00  3.172E−02 −5.518E−02  1.050E−02 1.225E−02 14 0.000E+00  9.067E−02 −1.001E−01  3.955E−02 −6.532E−03  15 0.000E+00  7.004E−02 −7.360E−02  3.203E−02 −8.520E−03  16 −1.383E+00  −1.399E−01  3.569E−02 −6.165E−03 9.907E−04 17 −9.175E+00  −8.272E−02  2.568E−02 −5.490E−03 8.362E−04 i A12 A14 A16 A18 A20 1 −3.590E−04 8.182E−05 −1.184E−05 1.030E−06 −3.970E−08 2  2.043E−03 −7.752E−04   1.706E−04 −2.030E−05   1.030E−06 4  2.535E−03 −9.002E−04   1.834E−04 −1.829E−05   6.324E−07 5  1.321E−02 −3.948E−03   7.570E−04 −8.198E−05   3.704E−06 6 −9.421E−03 2.883E−03 −5.818E−04 7.648E−05 −5.172E−06 7 −1.582E−02 5.637E−03 −1.219E−03 1.797E−04 −1.554E−05 8 −2.964E−02 9.037E−03 −1.738E−03 2.437E−04 −2.201E−05 9 −1.530E−02 2.743E−03  1.038E−04 −1.180E−04   1.513E−05 10  4.742E−03 −2.665E−03   1.011E−03 −2.284E−04   2.156E−05 11  4.540E−02 −1.930E−02   5.043E−03 −7.405E−04   4.680E−05 12 −1.047E−02 3.118E−03 −4.692E−04 2.462E−05  6.424E−07 13 −9.781E−03 3.365E−03 −6.238E−04 6.035E−05 −2.392E−06 14 −7.781E−04 5.842E−04 −1.188E−04 1.160E−05 −4.539E−07 15  1.447E−03 −1.559E−04   1.025E−05 −3.701E−07   5.532E−09 16 −1.410E−04 1.439E−05 −9.178E−07 3.262E−08 −5.005E−10 17 −8.927E−05 6.366E−06 −2.863E−07 7.263E−09 −7.628E−11

(159) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−3.5 D12/f=0.07 f2/f3=2.1 f3/f=0.9 R4r/f=0.4 D45/f=0.14 D56/D67=1.5 T7/T8=1.3 D78/f=0.06 f8/f=−1.0 R8f/f=0.7 R8r/f=0.3 TL/f=1.2 TL/Hmax=1.7 f/Dep=1.9 f67/f=−7.7

(160) Accordingly, the imaging lens according to the Example 8 satisfies the above-described conditional expressions.

(161) FIG. 23 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 24 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 23 and 24, according to the imaging lens of the Example 8, aberrations can be properly corrected.

Example 9

(162) The basic lens data is shown below in Table 17.

(163) TABLE-US-00017 TABLE 17 f = 5.72 mm Fno = 1.4 ω = 39.1° i r d nd νd [mm] ∞ ∞ L1  1* 3.577 0.324 1.6707 19.2 f1 = −41.234  2* 3.052 0.781 3(ST) ∞ −0.362 L2  4* 3.153 0.723 1.5445 56.4 f2 = 12.612  5* 5.359 0.097 L3  6* 3.215 0.831 1.5445 56.4 f3 = 5.876  7* −590.771 0.038 L4  8* 3.730 0.250 1.6707 19.2 f4 = −13.103  9* 2.548 0.769 L5 10* 9.027 0.403 1.6503 21.5 f5 = −35.197 11* 6.360 0.329 L6 12* 16.661 0.616 1.5348 55.7 f6 = 6.906 13* −4.685 0.220 L7 14* 217.206 0.546 1.6707 19.2 f7 = 104.327 15* −103.133 0.394 L8 16* 8.181 0.471 1.5445 56.4 f8 = −4.627 17* 1.887 0.442 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.500 (IM) ∞ f56=8.584 mm R1f=3.577 mm R1r=3.052 mm R4r=2.548 mm R8f=8.181 mm R8r=1.887 mm D12=0.420 mm D45=0.769 mm D56=0.329 mm D67=0.220 mm D78=0.394 mm T7=0.546 mm T8=0.471 mm TL=7.510 mm Hmax=4.65 mm Dep=4.215 mm

(164) TABLE-US-00018 TABLE 18 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.970E−02 −1.794E−03 −1.085E−03 9.962E−04 2 0.000E+00 −2.255E−02 −5.998E−03  3.500E−03 −3.105E−03  4 −3.161E+00   6.025E−03 −3.877E−03  2.913E−03 −4.019E−03  5 −1.000E+02   1.118E−02 −4.663E−02  4.724E−02 −3.002E−02  6 −5.786E+00  −2.294E−02  2.393E−02 −2.268E−02 1.920E−02 7 0.000E+00  2.807E−02 −1.958E−02 −1.222E−02 2.468E−02 8 0.000E+00 −3.065E−02  3.034E−02 −6.433E−02 5.853E−02 9 −4.546E+00  −1.882E−02  4.374E−02 −5.641E−02 3.968E−02 10 0.000E+00 −4.675E−02  1.383E−02  1.132E−03 −5.714E−03  11 0.000E+00 −4.825E−02 −2.183E−02  6.000E−02 −6.732E−02  12 2.400E+01 −4.602E−03 −4.081E−04 −1.894E−02 1.961E−02 13 1.829E+00  6.830E−02 −5.783E−02  9.966E−03 1.220E−02 14 0.000E+00  8.714E−02 −9.826E−02  3.907E−02 −6.544E−03  15 0.000E+00  6.907E−02 −7.424E−02  3.212E−02 −8.518E−03  16 1.589E−01 −1.342E−01  3.605E−02 −6.174E−03 9.889E−04 17 −7.030E+00  −7.293E−02  2.461E−02 −5.461E−03 8.381E−04 i A12 A14 A16 A18 A20 1 −3.592E−04 8.206E−05 −1.193E−05 1.004E−06 −3.683E−08 2  2.042E−03 −7.751E−04   1.704E−04 −2.034E−05   1.025E−06 4  2.565E−03 −9.015E−04   1.823E−04 −2.023E−05   9.760E−07 5  1.323E−02 −3.969E−03   7.509E−04 −7.981E−05   3.622E−06 6 −9.822E−03 3.284E−03 −7.347E−04 1.004E−04 −6.248E−06 7 −1.565E−02 5.683E−03 −1.271E−03 1.606E−04 −8.684E−06 8 −2.943E−02 9.066E−03 −1.725E−03 1.863E−04 −8.632E−06 9 −1.525E−02 2.731E−03  8.976E−05 −1.207E−04   1.476E−05 10  4.699E−03 −2.667E−03   1.014E−03 −2.223E−04   2.045E−05 11  4.542E−02 −1.931E−02   5.042E−03 −7.406E−04   4.689E−05 12 −1.046E−02 3.097E−03 −4.708E−04 2.513E−05  6.982E−07 13 −9.777E−03 3.367E−03 −6.234E−04 6.040E−05 −2.410E−06 14 −7.690E−04 5.864E−04 −1.186E−04 1.155E−05 −4.632E−07 15  1.447E−03 −1.559E−04   1.025E−05 −3.704E−07   5.504E−09 16 −1.411E−04 1.439E−05 −9.183E−07 3.265E−08 −4.943E−10 17 −8.925E−05 6.367E−06 −2.866E−07 7.301E−09 −7.962E−11

(165) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−3.3 D12/f=0.07 f2/f3=2.1 f3/f=1.0 R4r/f=0.4 D45/f=0.13 D56/D67=1.5 T7/T8=1.2 D78/f=0.07 f8/f=−0.8 R8f/f=1.4 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.6 f/Dep=1.4 f6/f=1.2 f56/f=1.5

(166) Accordingly, the imaging lens according to the Example 9 satisfies the above-described conditional expressions.

(167) FIG. 26 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 27 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 26 and 27, according to the imaging lens of the Example 9, aberrations can be properly corrected.

Example 10

(168) The basic lens data is shown below in Table 19.

(169) TABLE-US-00019 TABLE 19 f = 5.65 mm Fno = 1.4 ω = 39.3° i r d nd νd [mm] ∞ ∞ L1  1* 3.562 0.325 1.6707 19.2 f1 = −43.257  2* 3.056 0.825 3(ST) ∞ −0.401 L2  4* 3.150 0.717 1.5445 56.4 f2 = 12.496  5* 5.395 0.104 L3  6* 3.217 0.822 1.5445 56.4 f3 = 5.868  7* −421.060 0.031 L4  8* 3.741 0.250 1.6707 19.2 f4 = −13.320  9* 2.566 0.768 L5 10* 8.848 0.398 1.6503 21.5 f5 = −39.555 11* 6.467 0.329 L6 12* 15.818 0.631 1.5348 55.7 f6 = 6.680 13* −4.551 0.217 L7 14* −211.622 0.556 1.6707 19.2 f7 = −125.268 15* 139.499 0.397 L8 16* 8.053 0.466 1.5445 56.4 f8 = −4.620 17* 1.878 0.337 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.532 (IM) ∞ f56=8.050 mm R1f=3.562 mm R1r=3.056 mm R4r=2.566 mm R8f=8.053 mm R8r=1.878 mm D12=0.424 mm D45=0.768 mm D56=0.329 mm D67=0.217 mm D78=0.397 mm T7=0.556 mm T8=0.466 mm TL=7.444 mm Hmax=4.63 mm Dep=4.066 mm

(170) TABLE-US-00020 TABLE 20 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.983E−02 −1.780E−03 −1.087E−03 9.969E−04 2 0.000E+00 −2.251E−02 −5.987E−03  3.507E−03 −3.105E−03  4 −3.375E+00   6.057E−03 −3.815E−03  2.913E−03 −4.016E−03  5 −1.000E+02   1.102E−02 −4.654E−02  4.724E−02 −3.002E−02  6 −5.517E+00  −2.302E−02  2.394E−02 −2.268E−02 1.919E−02 7 0.000E+00  2.738E−02 −1.957E−02 −1.225E−02 2.467E−02 8 0.000E+00 −3.018E−02  3.027E−02 −6.427E−02 5.856E−02 9 −4.473E+00  −1.927E−02  4.390E−02 −5.629E−02 3.969E−02 10 0.000E+00 −4.589E−02  1.348E−02  1.045E−03 −5.711E−03  11 0.000E+00 −4.787E−02 −2.182E−02  5.996E−02 −6.732E−02  12 2.400E+01 −7.043E−03 −2.625E−04 −1.891E−02 1.961E−02 13 1.795E+00  6.844E−02 −5.789E−02  9.982E−03 1.220E−02 14 0.000E+00  8.737E−02 −9.811E−02  3.903E−02 −6.547E−03  15 0.000E+00  6.925E−02 −7.430E−02  3.212E−02 −8.519E−03  16 1.258E−01 −1.341E−01  3.605E−02 −6.174E−03 9.889E−04 17 −7.386E+00  −7.298E−02  2.465E−02 −5.460E−03 8.381E−04 i A12 A14 A16 A18 A20 1 −3.593E−04 8.208E−05 −1.193E−05 1.005E−06 −3.695E−08 2  2.042E−03 −7.751E−04   1.704E−04 −2.034E−05   1.025E−06 4  2.565E−03 −9.017E−04   1.822E−04 −2.025E−05   9.830E−07 5  1.323E−02 −3.969E−03   7.509E−04 −7.982E−05   3.624E−06 6 −9.825E−03 3.283E−03 −7.345E−04 1.004E−04 −6.269E−06 7 −1.565E−02 5.683E−03 −1.271E−03 1.607E−04 −8.716E−06 8 −2.943E−02 9.066E−03 −1.725E−03 1.863E−04 −8.616E−06 9 −1.524E−02 2.732E−03  8.950E−05 −1.208E−04   1.482E−05 10  4.707E−03 −2.666E−03   1.014E−03 −2.225E−04   2.050E−05 11  4.542E−02 −1.931E−02   5.042E−03 −7.406E−04   4.688E−05 12 −1.047E−02 3.096E−03 −4.708E−04 2.517E−05  7.027E−07 13 −9.777E−03 3.367E−03 −6.234E−04 6.040E−05 −2.410E−06 14 −7.688E−04 5.865E−04 −1.186E−04 1.155E−05 −4.634E−07 15  1.447E−03 −1.559E−04   1.025E−05 −3.703E−07   5.497E−09 16 −1.411E−04 1.439E−05 −9.183E−07 3.265E−08 −4.943E−10 17 −8.925E−05 6.367E−06 −2.866E−07 7.301E−09 −7.960E−11

(171) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−3.5 D12/f=0.08 f2/f3=2.1 f3/f=1.0 R4r/f=0.5 D45/f=0.14 D56/D67=1.5 T7/T8=1.2 D78/f=0.07 f8/f=−0.8 R8f/f=1.4 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.6 f/Dep=1.4 f6/f=1.2 f56/f=1.4

(172) Accordingly, the imaging lens according to the Example 10 satisfies the above-described conditional expressions.

(173) FIG. 29 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 30 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 29 and 30, according to the imaging lens of the Example 10, aberrations can be properly corrected.

Example 11

(174) The basic lens data is shown below in Table 21.

(175) TABLE-US-00021 TABLE 21 f = 6.66 mm Fno = 1.9 ω = 34.8° i r d nd νd [mm] ∞ ∞ L1  1* 3.523 0.358 1.6707 19.2 f1 = −39.777  2* 2.985 0.846 3(ST) ∞ −0.382 L2  4* 3.082 0.746 1.5445 56.4 f2 = 12.080  5* 5.305 0.073 L3  6* 3.133 0.922 1.5445 56.4 f3 = 5.692  7* −260.625 0.012 L4  8* 3.674 0.250 1.6707 19.2 f4 = −13.657  9* 2.550 0.887 L5 10* 39.993 0.385 1.6503 21.5 f5 = −101.220 11* 24.784 0.354 L6 12* −18.412 0.318 1.5348 55.7 f6 = −100.655 13* −28.151 0.207 L7 14* 12.139 0.658 1.6707 19.2 f7 = 17.539 15* −372.925 0.499 L8 16* 4.871 0.503 1.5445 56.4 f8 = −5.844 17* 1.855 0.300 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.815 (IM) ∞ R1f=3.523 mm R1r=2.985 mm R4r=2.550 mm R8f=4.871 mm R8r=1.855 mm D12=0.463 mm D45=0.887 mm D56=0.354 mm D67=0.207 mm D78=0.499 mm T7=0.658 mm T8=0.503 mm TL=7.887 mm Hmax=4.63 mm Dep=3.529 mm

(176) TABLE-US-00022 TABLE 22 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.974E−02 −1.716E−03 −1.116E−03 9.962E−04 2 0.000E+00 −2.270E−02 −5.992E−03  3.513E−03 −3.103E−03  4 −2.839E+00   7.212E−03 −4.181E−03  3.159E−03 −4.026E−03  5 −1.000E+02   1.224E−02 −4.638E−02  4.725E−02 −2.989E−02  6 −6.091E+00  −2.166E−02  2.433E−02 −2.281E−02 1.897E−02 7 0.000E+00  2.405E−02 −2.010E−02 −1.203E−02 2.474E−02 8 0.000E+00 −3.023E−02  3.136E−02 −6.414E−02 5.857E−02 9 −4.102E+00  −1.690E−02  4.553E−02 −5.570E−02 3.961E−02 10 0.000E+00 −4.092E−02  1.334E−02  6.728E−04 −5.723E−03  11 0.000E+00 −3.221E−02 −2.474E−02  5.981E−02 −6.728E−02  12 0.000E+00 −1.261E−02  9.419E−05 −1.940E−02 1.963E−02 13 0.000E+00  2.904E−02 −5.550E−02  1.045E−02 1.225E−02 14 0.000E+00  7.452E−02 −9.795E−02  3.936E−02 −6.555E−03  15 0.000E+00  6.919E−02 −7.392E−02  3.208E−02 −8.523E−03  16 −3.766E+00  −1.400E−01  3.585E−02 −6.161E−03 9.909E−04 17 −8.170E+00  −8.079E−02  2.526E−02 −5.474E−03 8.372E−04 i A12 A14 A16 A18 A20 1 −3.584E−04 8.193E−05 −1.195E−05 1.011E−06 −3.508E−08 2  2.043E−03 −7.758E−04   1.705E−04 −2.032E−05   1.027E−06 4  2.570E−03 −8.997E−04   1.814E−04 −2.052E−05   1.076E−06 5  1.318E−02 −3.963E−03   7.549E−04 −8.147E−05   3.835E−06 6 −9.439E−03 2.934E−03 −5.799E−04 6.937E−05 −3.907E−06 7 −1.565E−02 5.684E−03 −1.267E−03 1.615E−04 −8.857E−06 8 −2.942E−02 9.073E−03 −1.728E−03 1.844E−04 −7.808E−06 9 −1.529E−02 2.727E−03  9.274E−05 −1.197E−04   1.494E−05 10  4.720E−03 −2.656E−03   1.021E−03 −2.208E−04   1.979E−05 11  4.543E−02 −1.931E−02   5.042E−03 −7.406E−04   4.694E−05 12 −1.045E−02 3.103E−03 −4.725E−04 2.453E−05  6.173E−07 13 −9.782E−03 3.366E−03 −6.237E−04 6.038E−05 −2.399E−06 14 −7.740E−04 5.850E−04 −1.187E−04 1.157E−05 −4.538E−07 15  1.447E−03 −1.560E−04   1.025E−05 −3.700E−07   5.580E−09 16 −1.410E−04 1.439E−05 −9.183E−07 3.260E−08 −5.003E−10 17 −8.927E−05 6.367E−06 −2.865E−07 7.248E−09 −7.660E−11

(177) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−3.3 D12/f=0.07 f2/f3=2.1 f3/f=0.9 R4r/f=0.4 D45/f=0.13 D56/D67=1.7 T7/T8=1.3 D78/f=0.07 f8/f=−0.9 R8f/f=0.7 R8r/f=0.3 TL/f=1.2 TL/Hmax=1.7 f/Dep=1.9

(178) Accordingly, the imaging lens according to the Example 11 satisfies the above-described conditional expressions.

(179) FIG. 32 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 33 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 32 and 33, according to the imaging lens of the Example 11, aberrations can be properly corrected.

Example 12

(180) The basic lens data is shown below in Table 23.

(181) TABLE-US-00023 TABLE 23 f = 5.62 mm Fno = 1.4 ω = 39.2° i r d nd νd [mm] ∞ ∞ L1  1* 3.562 0.321 1.6707 19.2 f1 = −42.511  2* 3.051 0.790 3(ST) ∞ −0.362 L2  4* 3.164 0.703 1.5445 56.4 f2 = 12.619  5* 5.406 0.099 L3  6* 3.217 0.813 1.5445 56.4 f3 = 5.844  7* −264.928 0.030 L4  8* 3.730 0.250 1.6707 19.2 f4 = −13.345  9* 2.562 0.774 L5 10* 8.762 0.391 1.6503 21.5 f5 = −39.864 11* 6.434 0.336 L6 12* 15.014 0.650 1.5348 55.7 f6 = 6.818 13* −4.743 0.223 L7 14* ∞ 0.553 1.6707 19.2 f7 = ∞ 15* ∞ 0.391 L8 16* 8.041 0.450 1.5445 56.4 f8 = −4.631 17* 1.882 0.184 18  ∞ 0.210 1.5168 64.2 19  ∞ 0.696 (IM) ∞ f56=8.234 mm R1f=3.562 mm R1r=3.051 mm R4r=2.562 mm R8f=8.041 mm R8r=1.882 mm D12=0.428 mm D45=0.774 mm D56=0.336 mm D67=0.223 mm D78=0.391 mm T7=0.553 mm T8=0.450 mm TL=7.430 mm Hmax=4.58 mm Dep=4.052 mm

(182) TABLE-US-00024 TABLE 24 Aspheric Surface Data i k A4 A6 A8 A10 1 0.000E+00 −1.974E−02 −1.744E−03 −1.087E−03 9.968E−04 2 0.000E+00 −2.244E−02 −5.975E−03  3.502E−03 −3.105E−03  4 −3.575E+00   6.445E−03 −4.223E−03  2.984E−03 −4.059E−03  5 −1.000E+02   1.100E−02 −4.654E−02  4.713E−02 −2.993E−02  6 −5.390E+00  −2.270E−02  2.420E−02 −2.264E−02 1.900E−02 7 0.000E+00  2.748E−02 −1.962E−02 −1.224E−02 2.468E−02 8 0.000E+00 −3.052E−02  3.029E−02 −6.422E−02 5.856E−02 9 −4.441E+00  −1.908E−02  4.390E−02 −5.626E−02 3.969E−02 10 0.000E+00 −4.604E−02  1.365E−02  9.298E−04 −5.675E−03  11 0.000E+00 −4.768E−02 −2.181E−02  5.994E−02 −6.733E−02  12 2.400E+01 −5.571E−03 −6.458E−04 −1.890E−02 1.964E−02 13 1.725E+00  6.809E−02 −5.814E−02  1.001E−02 1.220E−02 14 0.000E+00  8.691E−02 −9.818E−02  3.905E−02 −6.549E−03  15 0.000E+00  6.944E−02 −7.433E−02  3.212E−02 −8.519E−03  16 1.012E−01 −1.343E−01  3.606E−02 −6.175E−03 9.890E−04 17 −7.134E+00  −7.312E−02  2.464E−02 −5.459E−03 8.381E−04 i A12 A14 A16 A18 A20 1 −3.595E−04 8.203E−05 −1.195E−05 1.007E−06 −3.656E−08 2  2.043E−03 −7.757E−04   1.704E−04 −2.032E−05   1.026E−06 4  2.568E−03 −8.987E−04   1.819E−04 −2.045E−05   1.016E−06 5  1.317E−02 −3.962E−03   7.557E−04 −8.134E−05   3.752E−06 6 −9.440E−03 2.930E−03 −5.815E−04 6.906E−05 −3.800E−06 7 −1.565E−02 5.683E−03 −1.269E−03 1.601E−04 −8.659E−06 8 −2.944E−02 9.066E−03 −1.725E−03 1.871E−04 −8.790E−06 9 −1.524E−02 2.726E−03  8.878E−05 −1.191E−04   1.459E−05 10  4.702E−03 −2.667E−03   1.014E−03 −2.224E−04   2.046E−05 11  4.542E−02 −1.931E−02   5.043E−03 −7.406E−04   4.687E−05 12 −1.048E−02 3.100E−03 −4.709E−04 2.514E−05  6.868E−07 13 −9.778E−03 3.367E−03 −6.234E−04 6.041E−05 −2.410E−06 14 −7.683E−04 5.865E−04 −1.186E−04 1.155E−05 −4.635E−07 15  1.447E−03 −1.559E−04   1.025E−05 −3.703E−07   5.500E−09 16 −1.411E−04 1.439E−05 −9.181E−07 3.265E−08 −4.945E−10 17 −8.925E−05 6.367E−06 −2.866E−07 7.302E−09 −7.966E−11

(183) The values of the respective conditional expressions are as follows: R1f/R1r=1.2 f1/f2=−3.4 D12/f=0.08 f2/f3=2.2 f3/f=1.0 R4r/f=0.5 D45/f=0.14 D56/D67=1.5 T7/T8=1.2 D78/f=0.07 f8/f=−0.8 R8f/f=1.4 R8r/f=0.3 TL/f=1.3 TL/Hmax=1.6 f/Dep=1.4 f6/f=1.2 f56/f=1.5

(184) Accordingly, the imaging lens according to the Example 12 satisfies the above-described conditional expressions.

(185) FIG. 35 shows spherical aberration (mm), astigmatism (mm), and distortion (%), respectively. FIG. 36 shows a lateral aberration corresponding to the image height ratio H. As shown in FIGS. 35 and 36, according to the imaging lens of the Example 12, aberrations can be properly corrected.

(186) As described above, the imaging lens according to the present examples has a very wide field of view (2ω) of 60° or more. More specifically, the imaging lenses of Examples 1 to 12 have fields of view (2ω) of 60.2° to 78.6°. According to the imaging lens of the present embodiments, it is possible to take an image over a wider range than that taken by a conventional imaging lens.

(187) In recent years, with advancement in digital-zoom technology to enlarge any range of an image obtained through an imaging lens by image processing, an image sensor with higher pixel count has been often applied in combination with an imaging lens of higher resolution. In the case of the image sensor with the higher pixel count, a light-receiving area per pixel often decreases, so that an image tends to be dark. The imaging lenses of Examples 1 to 12 have Fnos as small as 1.4 to 2.3. According to the imaging lenses of the present embodiments, it is possible to take a sufficiently bright image responding to the image sensor with the higher pixel count as mentioned above.

(188) Therefore, when the imaging lens of the above-described embodiment is applied in an imaging optical system such as cameras built in mobile devices, namely, smartphones, cellular phones, and mobile information terminals, digital still cameras, security cameras, onboard cameras, and network cameras, it is possible to attain both high performance and downsizing of the cameras.

(189) The present invention is applicable in an imaging lens that is mounted in a relatively small-sized camera, such as cameras built in mobile devices, namely smartphones, cellular phones and mobile information terminals, digital still cameras, security cameras, onboard cameras, and network cameras.

DESCRIPTION OF REFERENCE NUMERALS

(190) X: optical axis ST: aperture stop L1: first lens L2: second lens L3: third lens L4: fourth lens L5: fifth lens L6: sixth lens L7: seventh lens L8: eighth lens 10: filter IM: image plane