ZOOM LENS, PROJECTION DISPLAY DEVICE, AND IMAGING APPARATUS FOR FORMING AN INTERMEDIATE IMAGE
20200081233 ยท 2020-03-12
Assignee
Inventors
- Masaru Amano (Saitama, JP)
- Akiko Nagahara (Saitama, JP)
- Yukiko Nagatoshi (Saitama, JP)
- Kazuki Inoue (Saitama, JP)
Cpc classification
G02B13/06
PHYSICS
G02B13/16
PHYSICS
International classification
G02B15/14
PHYSICS
Abstract
A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image. Among the plurality of lens groups, a final lens group closest to the reduction side has a positive refractive power, and remains stationary with respect to the reduction side imaging plane during zooming. The zoom lens satisfies predetermined conditional expressions (1) and (2) about the focal lengths of the movable lens groups.
Claims
1. A zoom lens that forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane, the zoom lens comprising a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image, wherein among the plurality of lens groups, a final lens group closest to the reduction side remains stationary with respect to the reduction side imaging plane during zooming, an element of the zoom lens positioned most toward the magnification side is a lens; and the total angle of view of the zoom lens is greater than or equal to 115 degrees.
2. The zoom lens as defined in claim 1, wherein: the final lens group consists of one lens.
3. The zoom lens as defined in claim 1, wherein: the final lens group has a positive refractive power.
4. The zoom lens as defined in claim 1, comprising four or five lens groups as a whole, wherein distances between adjacent lens groups change in the direction of the optical axis during zooming.
5. The zoom lens according to claim 1, wherein the following conditional expression (1) is satisfied,
0<|fw|/fA<0.145(1), where fw is a focal length of the whole system at a wide-angle end, and fA is a focal length of a movable lens group closest to the reduction side among the plurality of movable lens groups.
6. The zoom lens according to claim 1, wherein the following conditional expression (2) is satisfied,
0.01<|fw|/fB<0.2(2), where fw is a focal length of the whole system at a wide-angle end, and fB is a focal length of a second movable lens group from the reduction side among the plurality of movable lens groups.
7. The zoom lens according to claim 1, wherein the following conditional expression (3) is satisfied,
6<fM/|fw|<20(3), where fM is a focal length of the final lens group.
8. The zoom lens according to claim 1, wherein the following conditional expression (4) is satisfied,
0<Y max/|exPw|<0.1(4), where Ymax is an effective image circle radius on the reduction side, and exPw is a distance on the optical axis from the reduction side imaging plane to a paraxial exit pupil position at the wide-angle end in a case where the reduction side is set as an exit side.
9. The zoom lens according to claim 1, wherein the following conditional expression (5) is satisfied,
2<Bfw/|fw|(5), where Bfw is a back focal length of the whole system as an air conversion length at the wide-angle end.
10. The zoom lens according to claim 5, wherein the following conditional expression (1-1) is satisfied,
0<|fw|/fA<0.14(1-1).
11. The zoom lens according to claim 6, wherein the following conditional expression (2-1) is satisfied,
0.03<|fw|/fB<0.16(2-1).
12. The zoom lens according to claim 7, wherein the following conditional expression (3-1) is satisfied,
7<fM/|fw|<18(3-1).
13. The zoom lens according to claim 8, wherein the following conditional expression (4-1) is satisfied,
0<Ymax/|exPw|<0.07(4-1).
14. The zoom lens according to claim 9, wherein the following conditional expression (5-1) is satisfied,
3<Bfw/|fw|<11(5-1).
15. The zoom lens according to claim 6, wherein the following conditional expression (2-2) is satisfied,
0.01<|fw|/fB0.1(2-2).
16. A projection display device comprising: a light valve from which an optical image is output based on image data; and the zoom lens according to claim 1, wherein the imaging optical system projects the optical image, which is output from the light valve, onto a screen.
17. An imaging apparatus comprising the zoom lens according to claim 1.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0061] Hereinafter, embodiments of the present invention will be described with reference to drawings.
[0062] This zoom lens is, for example, mounted on a projection display device, and can be used to project image information displayed on the light valve onto the screen. In
[0063] As shown in
[0064] In the example shown in
[0065] In a normal zoom lens of a system which does not form an intermediate image, in a case where an increase in angle of view is intended to be achieved by shortening a focal length thereof, the size of the magnification side lens inevitably becomes excessively large. However, in a manner similar to that of the present embodiment, in a zoom lens of a system which forms an intermediate image, it is possible to shorten a back focal length of the lens system (in the example shown in
[0066] Further, zooming is performed by moving a lens system closer to the reduction side than the intermediate image. As for the zooming operation, change in relay magnification of the lens system closer to the reduction side than the intermediate image corresponds to change in size of the intermediate image, and thus it is possible to achieve an optically simple configuration.
[0067] Further, the final lens group, which remains stationary with respect to the reduction side imaging plane during zooming and has a positive refractive power, is disposed to be closest to the reduction side. Thereby, it is possible to reduce fluctuation in aberrations during zooming while keeping the zoom lens telecentric.
[0068] Further, the zoom lens is configured to satisfy the following conditional expressions (1) and (2).
0<|fw|/fA<0.145(1)
0.01<|fw|/fB<0.2(2)
[0069] Here, fw is a focal length of the whole system at the wide-angle end,
[0070] fA is a focal length of a movable lens group closest to the reduction side among the plurality of movable lens groups, and
[0071] fB is a focal length of a second movable lens group from the reduction side among the plurality of movable lens groups.
[0072] The conditional expression (1) is a conditional expression for satisfactorily correcting fluctuation in aberrations during zooming. By not allowing the result of the conditional expression (1) to be equal to or less than the lower limit, among the plurality of movable lens groups, the power of the movable lens group closest to the reduction side can be prevented from becoming excessively weak. Thus, an amount of movement for ensuring a desired zoom ratio is minimized, and this contributes to reduction in lens total length. By not allowing the result of the conditional expression (1) to be equal to or greater than the upper limit, among the plurality of movable lens groups, the power of the movable lens group closest to the reduction side can be prevented from becoming excessively strong. Thus, it is possible to suppress fluctuation in longitudinal chromatic aberration and spherical aberration during zooming.
[0073] The conditional expression (2) is also a conditional expression for satisfactorily correcting fluctuation in aberrations during the same zooming. By not allowing the result of the conditional expression (2) to be equal to or less than the lower limit, among the plurality of movable lens groups, the power of the second movable lens group from the reduction side can be prevented from becoming excessively weak. Thus, it becomes easy to ensure the desired zoom ratio, and this contributes to reduction in lens diameter of the movable lens group. By not allowing the result of the conditional expression (2) to be equal to or greater than the upper limit, among the plurality of movable lens groups, the power of the second movable lens group from the reduction side can be prevented from becoming excessively strong. Thus, it is possible to easily correct astigmatism during zooming.
[0074] In addition, in a case where the following conditional expression (1-1) and/or (2-1) is satisfied, it is possible to obtain more favorable characteristics.
0<|fw|/fA<0.14(1-1)
0.03<|fw|/fB<0.16(2-1)
[0075] The zoom lens of the present invention may comprise four or five lens groups as a whole. A lens group closest to the magnification side and the final lens group closest to the reduction side may remain stationary with respect to the reduction side imaging plane during zooming. Among lens groups between the lens group closest to the magnification side and the final lens group closest to the reduction side, at least two lens groups may move by changing spacings between the groups adjacent to each other in the direction of the optical axis during zooming.
[0076] As described above, by adopting a configuration using at most five lens groups, it is possible to simplify a configuration of the entire zoom lens. Further, in a case where the lens group closest to the magnification side is intended to move during zooming, mechanical parts for the zooming operation are increased in size and elongated, and this leads to an increase in costs. Therefore, in addition to the final lens group, the lens group closest to the magnification side is also set to be stationary during zooming, whereby it is possible to solve such a problem.
[0077] It is preferable that the zoom lens satisfies the following conditional expression (3). By not allowing the result of the conditional expression (3) to be equal to or less than the lower limit, it is possible to prevent the power of the final lens group from becoming excessively strong. Thus, by minimizing an amount of occurrence of lateral chromatic aberration in the final lens group, it is possible to easily correct lateral chromatic aberration in other groups. By not allowing the result of the conditional expression (3) to be equal to or greater than the upper limit, it is possible to prevent the power of the final lens group from becoming excessively weak. Thus, it becomes easy to make the zoom lens telecentric on the reduction side. In addition, in a case where the following conditional expression (3-1) is satisfied, it is possible to obtain more favorable characteristics.
6<fM/|fw|<20(3)
7<fM/|fw|<18(3-1)
[0078] Here, fM is a focal length of the final lens group, and
[0079] fw is a focal length of the whole system at the wide-angle end.
[0080] It is preferable that the zoom lens satisfies the following conditional expression (4). By satisfying the conditional expression (4), it becomes easy to ensure telecentricity while obtaining a size of a desired image circle. In addition, in a case where the following conditional expression (4-1) is satisfied, it is possible to obtain more favorable characteristics.
0<Ymax/|exPw|<0.1(4)
0<Ymax/|exPw|<0.07(4-1)
[0081] Here, Ymax is an effective image circle radius on the reduction side, and
[0082] exPw is a distance on the optical axis from the reduction side imaging plane to a paraxial exit pupil position at the wide-angle end in a case where the reduction side is set as an exit side.
[0083] It is preferable that the zoom lens satisfies the following conditional expression (5). By not allowing the result of the conditional expression (5) to be equal to or less than the lower limit, it is possible to prevent the back focal length from being excessively shortened. Thus, it becomes easy to arrange the color synthesizing prism and the like. In addition, in a case where the following conditional expression (5-1) is satisfied, it is possible to obtain more favorable characteristics. By not allowing the result of the conditional expression (5-1) to be equal to or greater than the upper limit, it is possible to prevent the back focal length from becoming excessively large and the lens diameter from becoming large. Thus, it is possible to suppress an increase in number of lenses and an increase in costs of materials.
2<Bfw/|fw|(5)
3<Bfw/|fw|<11(5-1)
[0084] Here, Bfw is a back focal length of the whole system as an air conversion length at the wide-angle end, and
[0085] fw is a focal length of the whole system at the wide-angle end.
[0086] Next, numerical examples of the zoom lens of the present invention will be described.
[0087] First, a zoom lens of Example 1 will be described.
[0088] The zoom lens of Example 1 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4. An intermediate image is formed between the first lens group G1 and the second lens group G2. The first lens group G1 and the fourth lens group G4 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2 and the third lens group G3 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0089] The first lens group G1 includes eleven lenses as lenses L1a to L1k. The second lens group G2 includes four lenses as lenses L2a to L2d. The third lens group G3 includes five lenses as lenses L3a to L3e. The fourth lens group G4 includes one lens as only a lens L4a.
[0090] Table 1 shows lens data of the zoom lens of Example 1, Table 2 shows data about specification, Table 3 shows surface spacings which are variable during zooming, and Table 4 shows data about aspheric coefficients thereof. Hereinafter, meanings of the reference signs in the tables are, for example, as described in Example 1, and are basically the same as those in Examples 2 to 12.
[0091] In the lens data of Table 1, the column of the surface number shows surface numbers. The surface of the elements closest to the magnification side is the first surface, and the surface numbers sequentially increase toward the reduction side. The column of the radius of curvature shows radii of curvature of the respective surfaces. The column of the on-axis surface spacing shows spacings on the optical axis Z between the respective surfaces and the subsequent surfaces. Further, the column of n shows a refractive index of each optical element at the d line (a wavelength of 587.6 nm), and the column of v shows an Abbe number of each optical element at the d line (a wavelength of 587.6 nm). Here, the sign of the radius of curvature is positive in a case where a surface has a shape convex toward the magnification side, and is negative in a case where a surface has a shape convex toward the reduction side. In the lens data, the aperture stop St and the optical member PP are additionally noted. In a place of a surface number of a surface corresponding to the aperture stop St, the surface number and a term of (stop) are noted. Further, in the lens data, in each place of the surface spacing which is variable during zooming, DD[surface number] is noted. Numerical values each corresponding to the DD[surface number] are shown in Table 3.
[0092] In the data about the specification of Table 2, values of the zoom ratio, the focal length f, the F number FNo., and the total angle of view 2 are noted.
[0093] In the lens data of Table 1, the reference sign * is attached to surface numbers of aspheric surfaces, and radii of curvature of the aspheric surfaces are represented by numerical values of paraxial radii of curvature. In the data about aspheric coefficients of Table 4, surface numbers of aspheric surfaces, and aspheric coefficients of these aspheric surfaces are noted. The En (n: an integer) in numerical values of the aspheric coefficients of Table 4 indicates 10.sup.n. The aspheric coefficients are values of the coefficients KA and Am (m=3 . . . 20) in aspheric surface expression represented by the following expression.
Zd=C.Math.h.sup.2/{1+(1KA.Math.C.sup.2.Math.h.sup.2).sup.1/2}+Am.Math.h.sup.m
[0094] Here, Zd is an aspheric surface depth (a length of a perpendicular from a point on an aspheric surface at height h to a plane that is perpendicular to the optical axis and contacts with the vertex of the aspheric surface),
[0095] h is a height (a distance from the optical axis),
[0096] C is an inverse of a paraxial radius of curvature, and
[0097] KA and Am are aspheric coefficients (m=3 . . . 20).
TABLE-US-00001 TABLE 1 EXAMPLE 1LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF SURFACE NUMBER CURVATURE SPACING n *1 16.8844 3.1041 1.53158 55.08 *2 39.1686 11.7946 3 39.1318 1.7292 1.65160 58.55 4 8.9360 11.4741 5 10.7817 8.5447 1.80400 46.58 6 16.6204 0.1373 7 174.0429 2.4222 1.89286 20.36 8 41.4827 3.6906 9 38.6978 0.9310 1.76182 26.52 10 18.0298 7.5292 1.49700 81.61 11 27.6451 0.5877 12 693.0195 0.9310 1.84666 23.78 13 21.3262 7.4898 1.49700 81.61 14 35.1609 0.1385 *15 34.7539 3.0952 1.49100 57.58 *16 70.7753 15.2752 17 26.7420 8.4868 1.72916 54.68 18 59.7421 1.8359 19 33.6663 1.0341 1.51742 52.43 20 35.9185 DD[20] 21 42.1553 1.2414 1.48749 70.24 22 65.7706 1.4019 23 144.0055 9.1288 1.80518 25.42 24 34.5237 1.9741 25 28.9067 11.7248 1.80100 34.97 26 26.9627 2.7659 1.78472 25.68 27 22.7511 DD[27] 28 34.2130 3.4384 1.83400 37.16 29 104.2555 5.9827 30 12.8227 2.1765 1.67270 32.10 31 10.2706 2.5533 32(STOP) 3.5533 33 12.9988 5.0138 1.84666 23.78 34 57.0049 3.4611 1.55032 75.50 35 19.5485 0.1376 36 56.8352 4.1949 1.49700 81.61 37 21.9908 DD[37] 38 37.1429 3.6237 1.89286 20.36 39 9.1782 40 22.2759 1.51633 64.14 41
TABLE-US-00002 TABLE 2 EXAMPLE 1SPECIFICATION (d LINE) WIDE-ANGLE TELEPHOTO END END ZOOM RATIO 1.0 1.3 f 5.72 7.44 FNo. 2.00 2.17 2 [] 119.8 106.2
TABLE-US-00003 TABLE 3 EXAMPLE 1SURFACE SPACING WIDE-ANGLE TELEPHOTO END END DD[20] 20.3768 25.3250 DD[27] 18.9370 4.8281 DD[37] 15.0605 24.2212
TABLE-US-00004 TABLE 4 EXAMPLE 1ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 15 KA 2.7941853E01 1.8105190E+00 1.0000000E+00 A3 5.0921570E04 3.2728478E04 7.2478928E05 A4 6.3873272E04 4.7708143E04 7.6173442E05 A5 4.4839039E05 1.7854103E05 6.1936748E07 A6 1.1876211E06 3.0297809E06 1.1944480E06 A7 2.7572123E07 3.0052470E07 6.6734463E07 A8 5.3141374E09 4.6232008E09 9.8855940E08 A9 8.4646589E10 7.6097494E10 4.1374715E09 A10 4.3494235E11 4.9961876E11 2.2518107E09 A11 9.4985984E13 6.6383244E14 9.2586206E11 A12 1.1598267E13 1.4799288E13 2.2927738E11 A13 9.2980013E16 5.0835011E15 2.0673603E12 A14 1.4520584E16 1.5760865E16 9.4851376E14 A15 3.6120298E18 1.1489940E17 1.6277207E14 A16 7.3169783E20 7.8026822E21 3.5575532E17 A17 3.5273362E21 1.1320168E20 5.9040344E17 A18 6.9875354E24 1.3162372E22 1.4206486E18 A19 1.1897307E24 4.0731287E24 8.2650517E20 A20 1.3709873E26 7.3579689E26 3.0223753E21 SURFACE NUMBER 16 KA 1.0000000E+00 A3 5.0237120E05 A4 1.9586015E04 A5 2.6030817E05 A6 1.8240676E06 A7 9.6318799E07 A8 2.1538581E07 A9 2.1708011E09 A10 3.5847728E09 A11 2.6409287E10 A12 2.7713036E11 A13 3.7445443E12 A14 7.0466950E14 A15 2.5195342E14 A16 3.5827741E16 A17 8.4327983E17 A18 2.6831459E18 A19 1.1255821E19 A20 4.8065952E21
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[0099] Reference signs, meanings, and description methods of the respective data pieces according to Example 1 described above are the same as those in the following examples unless otherwise noted. Therefore, in the following description, repeated description will be omitted.
[0100] Next, a zoom lens of Example 2 will be described.
TABLE-US-00005 TABLE 5 EXAMPLE 2LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF NUMBER CURVATURE SURFACE SPACING n *1 17.2414 2.9654 1.53158 55.08 *2 49.2125 10.6787 3 57.6342 1.1725 1.90525 35.04 4 10.9253 13.5667 5 11.9107 0.8969 1.76182 26.52 6 55.1342 1.0121 7 28.3277 6.7268 1.83481 42.72 8 15.6842 0.3448 9 30.1823 2.7995 1.84666 23.78 10 215.4952 19.5983 11 26.2021 5.6143 1.67790 55.34 12 16.8209 0.9310 1.84666 23.78 13 17.1590 6.8415 1.49700 81.61 14 31.6692 1.0851 *15 80.8098 2.6353 1.49100 57.58 *16 38.8874 12.4450 17 32.6910 7.2819 1.80100 34.97 18 67.1562 3.0694 19 31.6933 1.0338 1.80518 25.42 20 52.7040 DD[20] 21 21.9713 1.4031 1.51633 64.14 22 62.1066 2.1324 23 733.6327 7.3028 1.80518 25.42 24 27.6406 0.1378 25 26.5908 9.4251 1.80400 46.58 26 48.4069 2.7655 1.71736 29.52 27 21.6402 DD[27] 28 31.1458 3.8751 1.80400 46.58 29 105.1127 2.7886 30 14.2690 2.7937 1.51742 52.43 31 10.2577 4.8370 32 (STOP) 3.5141 33 11.7925 1.1040 1.84666 23.78 34 96.5438 3.4211 1.55032 75.50 35 14.7066 2.9957 36 103.9823 4.4743 1.49700 81.61 37 19.3386 DD[37] 38 35.9871 3.6093 1.89286 20.36 39 9.1786 40 22.2759 1.51633 64.14 41
TABLE-US-00006 TABLE 6 EXAMPLE2SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.2 f 5.17 6.20 FNo. 2.00 2.13 2 [] 124.8 116.2
TABLE-US-00007 TABLE 7 EXAMPLE 2SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[20] 16.8556 21.6374 DD[27] 20.0994 8.4390 DD[37] 12.7668 19.6455
TABLE-US-00008 TABLE 8 EXAMPLE 2ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 15 KA 2.1299037E01 2.9144487E+00 1.0000000E+00 A3 2.1095964E04 5.7447036E04 1.2537575E04 A4 4.5494679E04 2.3158155E04 2.8429524E05 A5 3.0728584E05 5.6029895E06 2.8712325E05 A6 8.5803525E07 3.1229607E06 4.9968459E06 A7 1.6042162E07 1.2387605E07 4.4197647E07 A8 1.4132779E09 8.2162984E09 2.8611748E08 A9 4.8514693E10 5.5504688E10 2.9140944E09 A10 1.6347892E11 1.6373047E11 1.9704001E10 A11 6.9633654E13 1.8271759E12 1.8448163E11 A12 4.4319169E14 1.3615695E16 2.0237386E12 A13 1.9328421E16 3.1116331E15 1.0981586E13 A14 5.6298774E17 3.7160148E17 1.2176285E14 A15 6.9018194E19 3.4446901E18 2.9884319E16 A16 3.2317123E20 7.3840296E20 3.5718411E17 A17 8.1516171E22 1.8154739E21 4.6057267E19 A18 3.7783423E24 5.0354866E23 5.5606437E20 A19 2.7885931E25 4.5311465E25 1.9054616E22 A20 2.2694514E27 1.4253624E26 3.1275425E23 SURFACE NUMBER 16 KA 1.0000000E+00 A3 1.7242359E04 A4 7.7526916E05 A5 1.6185371E05 A6 1.9412912E06 A7 4.6908716E07 A8 1.1584632E07 A9 8.6560687E09 A10 1.1343582E09 A11 1.9872789E10 A12 1.2612510E12 A13 1.5863631E12 A14 3.8512783E14 A15 6.4106638E15 A16 2.5553464E16 A17 1.2872602E17 A18 6.4962653E19 A19 9.6472547E21 A20 5.7790698E22
[0101] Next, a zoom lens of Example 3 will be described.
TABLE-US-00009 TABLE 9 EXAMPLE 3LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF NUMBER CURVATURE SURFACE SPACING n *1 15.3256 3.1041 1.53158 55.08 *2 42.8676 8.1208 3 72.9696 3.7466 1.58913 61.13 4 10.9570 14.4952 *5 11.4427 10.1271 1.69350 53.18 *6 13.5555 0.1385 7 226.4073 3.3920 1.85896 22.73 8 26.1220 0.2797 9 38.9490 0.9310 1.84666 23.78 10 22.1582 8.2830 1.43875 94.66 11 20.0167 0.1384 12 38.0629 0.9311 1.84666 23.78 13 25.0469 6.4998 1.55032 75.50 14 36.6114 13.2095 15 26.1474 3.5448 1.69680 55.53 16 47.4517 0.1377 17 23.8780 4.5094 1.80400 46.58 18 41.0164 3.5961 19 73.4033 1.0339 1.80400 46.58 20 44.4268 DD[20] 21 85.9366 1.2410 1.48749 70.24 22 78.8404 1.5622 23 218.4867 7.5126 1.80518 25.42 24 34.9428 0.1379 25 28.5891 11.7248 1.80100 34.97 26 34.4084 2.7656 1.78472 25.68 27 22.1365 DD[27] 28 38.5640 6.1592 1.79952 42.22 29 96.1119 6.6148 30 12.5863 1.9009 1.51742 52.43 31 10.4680 4.1820 32 (STOP) 3.4483 33 13.7491 4.5080 1.80518 25.42 34 44.2803 3.5843 1.55032 75.50 35 20.9332 0.1385 36 66.5912 6.0558 1.49700 81.61 37 21.3539 DD[37] 38 37.9065 3.6665 1.89286 20.36 39 1065.0734 9.5172 40 22.2759 1.51633 64.14 41
TABLE-US-00010 TABLE 10 EXAMPLE 3SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.0 f 5.71 7.42 FNo. 2.02 2.22 2 [] 120.2 106.6
TABLE-US-00011 TABLE 11 EXAMPLE 3SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[20] 19.7566 23.3435 DD[27] 20.3350 7.3697 DD[37] 16.8274 26.2058
TABLE-US-00012 TABLE 12 EXAMPLE 3ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 5 KA 2.7887118E01 2.5297850E+00 1.0000000E+00 A3 1.3189565E03 1.0834090E03 5.7528541E20 A4 1.0077504E03 7.5981861E04 1.0110759E04 A5 7.6981053E05 2.8914229E05 1.9485961E05 A6 2.4419326E06 6.0428862E06 4.9299861E06 A7 6.0487795E07 5.6995162E07 2.4783632E07 A8 1.2399329E08 3.8888099E09 8.6033137E08 A9 2.3034355E09 2.3238253E09 1.4733516E08 A10 1.2557565E10 5.3186008E11 A11 3.3640761E12 4.7688518E12 A12 4.0808819E13 2.4246931E13 A13 2.6645072E15 1.6706577E15 A14 6.2698984E16 3.7971228E16 A15 1.5354132E17 7.7910013E18 A16 4.0281086E19 2.2338518E19 A17 1.8615292E20 1.3249510E20 A18 1.3664475E23 9.4582008E23 A19 7.6715055E24 6.0756592E24 A20 9.0985547E26 1.0743584E25 SURFACE NUMBER 6 KA 1.0000000E+00 A3 2.7450788E20 A4 4.9449064E06 A5 9.7355695E06 A6 3.3054473E06 A7 6.1001854E07 A8 5.4636126E08 A9 2.1328996E09
[0102] Next, a zoom lens of Example 4 will be described.
[0103] The zoom lens of Example 4 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5. An intermediate image is formed between the second lens group G2 and the third lens group G3. The first lens group G1 and the fifth lens group G5 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2, the third lens group G3, and the fourth lens group G4 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0104] The first lens group G1 includes nine lenses as lenses L1a to L1i. The second lens group G2 includes two lenses as lenses L2a and L2b. The third lens group G3 includes four lenses as lenses L3a to L3d. The fourth lens group G4 includes six lenses as lenses L4a to L4f. The fifth lens group G5 includes one lens as only a lens L5a.
[0105] Table 13 shows lens data of the zoom lens of Example 4, Table 14 shows data about specification, Table 15 shows surface spacings which are variable during zooming, Table 16 shows data about aspheric coefficients thereof, and
TABLE-US-00013 TABLE 13 EXAMPLE 4LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF NUMBER CURVATURE SURFACE SPACING n *1 15.3257 3.1041 1.53158 55.08 *2 33.1892 10.0852 3 40.4538 2.4685 1.62041 60.29 4 8.6430 10.0936 5 11.2762 7.2577 1.83481 42.72 6 17.0955 0.1381 7 182.9952 2.4765 1.89286 20.36 8 36.5411 2.0001 9 35.6081 0.9317 1.75520 27.51 10 16.8209 6.8261 1.49700 81.61 11 25.4795 0.3399 12 267.6247 0.9304 1.84666 23.78 13 18.9387 6.7530 1.49700 81.61 14 42.8291 0.1383 *15 106.4754 2.6191 1.49100 57.58 *16 349.9175 DD[16] 17 30.8964 7.7906 1.80400 46.58 18 83.2641 2.7908 19 35.5354 1.0345 1.54814 45.78 20 74.1099 DD[20] 21 50.1018 1.2416 1.48749 70.24 22 67.5112 2.4368 23 445.9501 7.6268 1.80518 25.42 24 35.0369 1.0354 25 28.9876 11.7241 1.80100 34.97 26 37.3021 1.3867 1.78472 25.68 27 24.2172 DD[27] 28 40.2271 3.4845 1.80610 40.93 29 134.3021 6.4061 30 14.8879 3.2023 1.59282 68.62 31 40.2390 0.8342 1.51742 52.43 32 10.6429 3.4847 33 (STOP) 4.7459 34 14.0751 5.7552 1.85478 24.80 35 121.0700 3.5097 1.59282 68.62 36 20.9375 0.1385 37 53.7339 4.4732 1.43875 94.66 38 23.5498 DD[38] 39 32.9929 3.7045 1.80809 22.76 40 286.0748 9.1738 41 22.2759 1.51633 64.14 42
TABLE-US-00014 TABLE 14 EXAMPLE 4SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.6 f 5.71 9.14 FNo. 2.00 2.32 2 [] 120.4 95.4
TABLE-US-00015 TABLE 15 EXAMPLE 4SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[16] 14.3660 18.1309 DD[20] 22.1353 27.6169 DD[27] 30.2604 4.8273 DD[38] 14.1661 30.3527
TABLE-US-00016 TABLE 16 EXAMPLE 4ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 15 KA 2.4141499E01 1.2443569E+00 1.0000000E+00 A3 1.0548641E03 8.8448311E04 9.9188567E05 A4 8.3674285E04 6.3492583E04 3.0661548E05 A5 6.2203974E05 2.5148517E05 4.3824644E05 A6 1.6931733E06 4.7634497E06 1.4133218E05 A7 4.3265443E07 4.6820320E07 1.7507446E06 A8 9.2963393E09 7.7190760E10 1.6107809E07 A9 1.4486672E09 1.7808022E09 6.5380545E08 A10 7.8786293E11 4.9251890E11 2.8124535E09 A11 1.7996418E12 3.5072008E12 8.8411414E10 A12 2.2614666E13 2.0320674E13 1.0033635E10 A13 1.6945437E15 1.2839303E15 3.1296368E12 A14 3.0897395E16 3.2125472E16 9.9989872E13 A15 7.5571704E18 4.7675296E18 2.7219117E14 A16 1.7512626E19 2.3371888E19 3.9426279E15 A17 8.0909075E21 8.0064105E21 2.5945002E16 A18 9.3635563E24 9.2687753E24 2.3858327E18 A19 2.9829776E24 3.5001412E24 6.0714673E19 A20 3.4190869E26 4.0836144E26 1.4353112E20 SURFACE NUMBER 16 KA 1.0000000E+00 A3 1.9710878E04 A4 2.7699157E04 A5 3.4909821E05 A6 5.8330314E07 A7 1.2714550E06 A8 1.8605027E07 A9 5.4440996E09 A10 2.8459871E09 A11 9.8577866E11 A12 1.9648267E11 A13 1.5012748E12 A14 5.0112842E14 A15 8.7059294E15 A16 1.2726604E16 A17 2.3563163E17 A18 1.0153859E18 A19 2.4244280E20 A20 1.6658139E21
[0106] Next, a zoom lens of Example 5 will be described.
TABLE-US-00017 TABLE 17 EXAMPLE 5LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF NUMBER CURVATURE SURFACE SPACING n *1 15.3257 3.1037 1.53158 55.08 *2 34.7664 11.4247 3 40.3127 1.7647 1.62299 58.16 4 8.3917 9.8338 5 10.9413 7.9941 1.83481 42.72 6 16.9770 0.1377 7 188.6544 2.5038 1.89286 20.36 8 38.7881 1.9933 9 34.2031 0.9460 1.72825 28.46 10 16.8209 7.2415 1.49700 81.61 11 26.7371 0.5298 12 349.2887 0.9309 1.84666 23.78 13 18.5093 7.1110 1.49700 81.61 14 41.7340 0.1386 *15 79.5713 2.7662 1.49100 57.58 *16 621.3076 DD[16] 17 29.6563 7.5688 1.80400 46.58 18 95.4511 2.5605 19 36.6865 1.0339 1.51742 52.43 20 44.0816 DD[20] 21 51.4439 1.2418 1.48749 70.24 22 69.7223 2.2483 23 441.0518 7.4804 1.80518 25.42 24 34.1355 1.6469 25 28.8569 11.7241 1.80100 34.97 26 33.2020 1.5448 1.78472 25.68 27 24.1607 DD[27] 28 33.6046 3.5630 1.80100 34.97 29 180.2001 8.5971 30 13.5482 1.2464 1.51742 52.43 31 10.9987 3.2101 32 (STOP) 3.4919 33 14.0473 4.4740 1.85478 24.80 34 70.6017 3.6976 1.59282 68.62 35 20.0695 0.1380 36 48.5692 4.7586 1.43875 94.66 37 23.3893 DD[37] 38 35.4283 3.8641 1.80809 22.76 39 9.1746 40 22.2759 1.51633 64.14 41
TABLE-US-00018 TABLE 18 EXAMPLE 5SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.5 f 5.71 8.57 FNo. 2.00 2.27 2 [] 120.4 98.8
TABLE-US-00019 TABLE 19 EXAMPLE 5SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[16] 16.5809 19.4606 DD[20] 20.2889 25.0617 DD[27] 27.0637 5.4902 DD[37] 17.4423 31.3634
TABLE-US-00020 TABLE 20 EXAMPLE 5ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 15 KA 2.4005572E01 1.2982535E+00 1.0000000E+00 A3 9.4117956E04 8.1119456E04 8.4641293E05 A4 8.2140376E04 6.3727543E04 6.0083889E05 A5 6.1338797E05 2.7193363E05 1.6551479E05 A6 1.6412446E06 4.5371150E06 7.5231031E06 A7 4.2425029E07 4.9118627E07 1.5936698E06 A8 9.2480460E09 4.2465019E09 4.8437602E08 A9 1.4192032E09 1.7105698E09 3.6848452E08 A10 7.8161464E11 7.7499087E11 4.6263308E09 A11 1.7400643E12 2.3931525E12 2.9213247E10 A12 2.2454204E13 2.8190216E13 8.8147072E11 A13 1.7770892E15 3.5062529E15 2.0337483E12 A14 3.0669185E16 4.1255051E16 6.9640960E13 A15 7.6406657E18 1.4330874E17 4.6551873E14 A16 1.7295229E19 2.3154553E19 2.0436648E15 A17 8.1462036E21 1.7632132E20 2.7187232E16 A18 1.0736468E23 9.6081658E23 1.9938241E18 A19 2.9999139E24 7.2952143E24 5.4287538E19 A20 3.4610499E26 1.0689391E25 1.5952204E20 SURFACE NUMBER 16 KA 1.0000000E+00 A3 1.1528411E04 A4 2.3260739E04 A5 3.3901237E05 A6 1.9336831E06 A7 1.2051151E06 A8 2.5129854E07 A9 1.4573787E09 A10 4.2460303E09 A11 3.1764927E10 A12 3.1421344E11 A13 4.6018352E12 A14 5.3879028E14 A15 3.0930304E14 A16 6.6051246E16 A17 1.0269513E16 A18 4.0507934E18 A19 1.3563390E19 A20 6.9559387E21
[0107] Next, a zoom lens of Example 6 will be described.
[0108] The zoom lens of Example 6 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4. An intermediate image is formed in the first lens group G1. The first lens group G1 and the fourth lens group G4 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2 and the third lens group G3 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0109] The first lens group G1 includes fifteen lenses as lenses L1a to L1o. The second lens group G2 includes one lens as only a lens L2a. The third lens group G3 includes five lenses as lenses L3a to L3e. The fourth lens group G4 includes one lens as only a lens L4a.
[0110] Table 21 shows lens data of the zoom lens of Example 6, Table 22 shows data about specification, Table 23 shows surface spacings which are variable during zooming, Table 24 shows data about aspheric coefficients thereof, and
TABLE-US-00021 TABLE 21 EXAMPLE 6LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS SURFACE NUMBER OF CURVATURE SPACING n *1 18.3142 2.4899 1.49100 57.58 *2 96.9137 2.0712 3 48.9275 1.9993 1.76450 49.10 4 23.9647 7.6151 5 65.9865 1.4477 1.83400 37.16 6 16.7451 8.4092 7 262.7052 1.1035 1.76200 40.10 8 22.5206 7.2640 *9 64.5661 3.4803 1.49100 57.58 *10 47.6316 5.7784 11 459.6927 6.7869 1.74077 27.76 12 76.4039 0.6899 13 393.0750 4.9037 1.72047 34.71 14 37.8135 36.2305 15 34.5572 6.0416 1.53775 74.70 16 40.9192 1.3530 17 48.3048 8.6595 1.55352 71.72 18 20.1461 1.4095 1.80518 25.42 19 16.9499 6.8429 1.49700 81.54 20 59.0487 8.7868 *21 43.6810 4.1374 1.49100 57.58 *22 31.9961 0.8987 23 44.8348 5.5682 1.84666 23.78 24 92.5400 55.8754 25 93.4627 2.0689 1.80518 25.42 26 67.9624 10.9710 1.58144 40.89 27 35.2286 DD[27] 28 61.9752 5.8752 1.79952 42.22 29 135.9888 DD[29] 30 17.4375 3.3738 1.83481 42.72 31 106.9410 0.8537 32 167.9264 0.9631 1.74000 28.30 33 12.2493 1.7400 34 (STOP) 5.6501 35 15.0061 2.0324 1.84666 23.78 36 70.3074 5.3081 1.53775 74.70 37 21.7095 1.6271 38 178.8720 4.3492 1.53775 74.70 39 23.3635 DD[39] 40 46.9154 3.8362 1.89286 20.36 41 188.9199 14.7937 42 17.2414 1.51633 64.14 43
TABLE-US-00022 TABLE 22 EXAMPLE 6SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.1 f 3.47 3.81 FNo. 1.99 1.99 2 [] 141.6 138.2
TABLE-US-00023 TABLE 23 EXAMPLE 6SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[27] 5.8860 0.3455 DD[29] 23.8400 27.3957 DD[39] 7.8289 9.8136
TABLE-US-00024 TABLE 24 EXAMPLE 6ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 9 KA 1.2613865E+00 7.3647229E+00 1.0000000E+00 A3 1.1196253E03 1.9031889E03 0.0000000E+00 A4 6.1879132E05 5.0287550E04 1.4533914E04 A5 7.3041219E06 1.5272557E04 7.1537183E06 A6 1.8469896E07 3.1440946E05 1.3113009E06 A7 5.8099862E09 4.4963146E06 1.6648358E07 A8 4.0627724E10 4.5741341E07 2.8775798E09 A9 2.1741878E12 3.3726144E08 1.2313102E09 A10 3.8327193E13 1.8233120E09 2.7356804E11 A11 9.1297258E15 7.2338783E11 3.0053995E12 A12 1.1288974E16 2.0816849E12 1.2058813E13 A13 6.4368883E18 4.2257416E14 0.0000000E+00 A14 3.1753242E20 5.7339175E16 0.0000000E+00 A15 1.4578632E21 4.6652540E18 0.0000000E+00 A16 1.7393012E23 1.7206958E20 0.0000000E+00 A17 0.0000000E+00 SURFACE NUMBER 10 21 22 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.0652978E04 1.0767184E04 2.2917737E04 A5 9.5695242E06 4.6749047E06 1.5005036E05 A6 3.9287893E07 2.0571848E06 1.1577556E06 A7 1.1814696E07 1.5517996E07 1.8648484E07 A8 3.1171043E09 1.7816833E08 1.6385947E09 A9 5.3806466E10 2.1237357E09 1.1356529E09 A10 2.6654605E11 8.7405600E11 6.3097062E12 A11 7.7570364E13 1.5134798E11 4.2378755E12 A12 4.8619495E14 1.5443689E13 3.7212562E14 A13 0.0000000E+00 6.0858244E14 9.3079102E15 A14 0.0000000E+00 3.1987853E16 8.7785436E17 A15 0.0000000E+00 1.3207939E16 1.0840632E17 A16 0.0000000E+00 1.0174698E18 7.9476957E20 A17 0.0000000E+00 1.1978965E19 5.1116703E21
[0111] Next, a zoom lens of Example 7 will be described.
[0112] The zoom lens of Example 7 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5. An intermediate image is formed in the second lens group G2. The first lens group G1 and the fifth lens group G5 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2, the third lens group G3, and the fourth lens group G4 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0113] The first lens group G1 includes six lenses as lenses L1a to L1f. The second lens group G2 includes six lenses as lenses L2a to L2f. The third lens group G3 includes two lenses as lenses L3a and L3b. The fourth lens group G4 includes five lenses as lenses L4a to L4e. The fifth lens group G5 includes one lens as only a lens L5a.
[0114] Table 25 shows lens data of the zoom lens of Example 7, Table 26 shows data about specification, Table 27 shows surface spacings which are variable during zooming, Table 28 shows data about aspheric coefficients thereof, and
TABLE-US-00025 TABLE 25 EXAMPLE 7LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS SURFACE NUMBER OF CURVATURE SPACING n *1 3.9258 3.1037 1.53158 55.08 *2 6.6674 9.0167 3 84.5054 1.8402 1.69680 55.53 4 17.3088 7.6118 *5 55.8371 1.2407 1.80400 46.58 6 13.9867 14.2116 7 16.1213 3.9488 1.59282 68.62 8 23.3208 0.1384 9 200.8834 5.7152 1.83481 42.72 10 49.0318 1.7248 11 107.6393 2.6253 1.90366 31.31 12 117.2064 DD[12] 13 48.1259 9.4978 1.49700 81.54 14 34.6322 6.2104 15 20.9019 6.6271 1.59282 68.62 16 20.6672 1.3306 1.80518 25.46 17 20.7742 7.5940 1.49700 81.54 18 33.2183 3.8261 *19 23.8746 3.4286 1.49100 57.58 *20 36.4478 25.0914 *21 42.1535 12.2050 1.83400 37.16 *22 23.7526 DD[22] 23 91.3107 12.4214 1.83481 42.72 24 26.5924 2.2066 1.84666 23.78 25 82.9830 DD[25] 26 39.8212 6.8970 1.89286 20.36 27 18.0179 0.8279 28 41.3339 1.3794 1.90366 31.31 29 68.8597 1.8857 30 (STOP) 3.7475 31 16.9633 0.6900 1.84666 23.78 32 22.9259 13.3373 1.59282 68.62 33 25.6607 4.3219 34 140.1251 4.8737 1.49700 81.54 35 27.4746 DD[35] 36 90.2922 4.9518 1.89286 20.36 37 102.3716 12.4703 38 22.2759 1.51633 64.14 39
TABLE-US-00026 TABLE 26 EXAMPLE 7SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.05 f 3.39 3.56 FNo. 2.00 2.00 2 [] 142.2 140.6
TABLE-US-00027 TABLE 27 EXAMPLE 7SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[12] 21.1893 21.1374 DD[22] 7.4621 4.1951 DD[25] 20.0685 21.6288 DD[35] 1.0616 2.8202
TABLE-US-00028 TABLE 28 EXAMPLE 7ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 5 KA 1.7095288E+00 4.0432390E+00 1.0000000E+00 A3 3.7980588E03 3.1947917E03 A4 6.8855043E05 2.6705955E04 3.0419920E05 A5 1.8832782E05 2.2341850E04 A6 1.2112954E06 5.6914062E05 1.1431133E07 A7 9.5009583E09 8.1540380E06 A8 3.0545738E09 8.3028905E07 5.7804966E11 A9 5.3192775E11 6.5780530E08 A10 3.6131407E12 4.0301258E09 2.9915434E15 A11 1.2403642E13 1.7947509E10 A12 1.9358350E15 5.3941969E12 A13 1.2359897E16 1.0383180E13 A14 4.4867357E20 1.4902076E15 A15 6.5401821E20 2.7852683E17 A16 4.6151956E22 3.6274120E19 A17 1.7941549E23 6.3932566E21 A18 2.0652057E25 1.8413162E22 A19 2.0089861E27 1.3219347E24 A20 2.9223794E29 4.3919128E26 SURFACE NUMBER 19 20 21 KA 1.1452956E+02 3.8414928E+00 1.0000000E+00 A3 5.1578410E04 9.1363252E04 A4 1.6124378E03 3.3511935E04 1.6924518E06 A5 5.0212685E04 1.1248379E04 A6 2.2052351E05 2.5017511E05 2.1647138E08 A7 9.9173935E06 8.6185266E06 A8 1.2398753E06 1.7753935E07 7.5379885E12 A9 7.8951964E08 2.2635925E07 A10 1.6799317E08 5.5592846E09 2.4173319E15 A11 3.1883320E10 3.3275402E09 A12 1.1702773E10 1.5825195E10 A13 5.7150368E13 2.8011863E11 A14 4.7045786E13 1.7341278E12 A15 1.6510937E16 1.3432364E13 A16 1.1031708E15 9.7185723E15 A17 2.1335677E18 3.4097763E16 A18 1.4056761E18 2.7678648E17 A19 2.2241176E21 3.5467827E19 A20 7.5435201E22 3.1865180E20 SURFACE NUMBER 22 KA 1.0000000E+00 A4 0.0000000E+00 A6 0.0000000E+00 A8 0.0000000E+00 A10 0.0000000E+00
[0115] Next, a zoom lens of Example 8 will be described.
[0116] The zoom lens of Example 8 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4. An intermediate image is formed in the first lens group G1. The first lens group G1 and the fourth lens group G4 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2 and the third lens group G3 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0117] The first lens group G1 includes twelve lenses as lenses L1a to L11. The second lens group G2 includes two lenses as lenses L2a and L2b. The third lens group G3 includes five lenses as lenses L3a to L3e. The fourth lens group G4 includes one lens as only a lens L4a.
[0118] Table 29 shows lens data of the zoom lens of Example 8, Table 30 shows data about specification, Table 31 shows surface spacings which are variable during zooming, Table 32 shows data about aspheric coefficients thereof, and
TABLE-US-00029 TABLE 29 EXAMPLE 8LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS SURFACE NUMBER OF CURVATURE SPACING n *1 3.9261 3.1028 1.53158 55.08 *2 6.6674 9.2268 3 87.9406 1.7243 1.69680 55.53 4 17.5353 7.2616 *5 54.2864 1.2408 1.80400 46.58 6 14.2107 14.9180 7 15.9688 4.5125 1.59282 68.62 8 22.0377 0.1922 9 187.1105 3.3112 1.83481 42.72 10 50.1636 1.7243 11 109.2648 5.8546 1.90366 31.31 12 134.3402 21.2535 13 53.6247 10.9636 1.59282 68.62 14 38.6576 5.0139 15 21.6966 6.6322 1.59282 68.62 16 21.8692 1.4180 1.80518 25.46 17 19.6183 7.1138 1.49700 81.54 18 35.1083 4.4075 *19 24.1707 3.1734 1.49100 57.58 *20 39.6030 25.1690 *21 41.1759 13.4971 1.83400 37.16 *22 24.3035 DD[22] 23 75.9290 11.1603 1.83481 42.72 24 29.2766 2.2063 1.84666 23.78 25 104.0156 DD[25] 26 42.2806 6.7602 1.89286 20.36 27 18.8129 0.8641 28 47.3959 3.5848 1.90366 31.31 29 62.0620 1.8402 30 (STOP) 3.2518 31 17.9944 3.8293 1.84666 23.78 32 27.2161 8.9730 1.59282 68.62 33 26.3998 7.0962 34 148.9135 4.8282 1.49700 81.54 35 28.1958 DD[35] 36 86.4463 4.8269 1.89286 20.36 37 100.4970 12.4117 38 22.2759 1.51633 64.14 39
TABLE-US-00030 TABLE 30 EXAMPLE 8SPECIFICATION (d LINE) WIDE-ANGLE END TELEPHOTO END ZOOM RATIO 1.0 1.05 f 3.44 3.61 FNo. 2.00 2.00 2 [] 141.4 139.8
TABLE-US-00031 TABLE 31 EXAMPLE 8SURFACE SPACING WIDE-ANGLE END TELEPHOTO END DD[22] 7.5586 4.2329 DD[25] 20.0872 21.4725 DD[35] 1.0117 2.9521
TABLE-US-00032 TABLE 32 EXAMPLE 8ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 5 KA 1.7096202E+00 4.0425773E+00 1.0000000E+00 A3 3.8021165E03 3.1976851E03 A4 6.9203959E05 2.6675505E04 3.0448817E05 A5 1.8877194E05 2.2241895E04 A6 1.2159913E06 5.6650619E05 1.1430408E07 A7 9.5627265E09 8.1118225E06 A8 3.0700011E09 8.2528404E07 5.7807943E11 A9 5.3319543E11 6.5328545E08 A10 3.6373704E12 3.9995451E09 2.9916774E15 A11 1.2452918E13 1.7799017E10 A12 1.9551069E15 5.3454281E12 A13 1.2422746E16 1.0280014E13 A14 5.1228778E20 1.4742078E15 A15 6.5800514E20 2.7546286E17 A16 4.6230070E22 3.5855344E19 A17 1.8068367E23 6.3152675E21 A18 2.0760382E25 1.8172062E22 A19 2.0251005E27 1.3037456E24 A20 2.9428653E29 4.3274632E26 SURFACE NUMBER 19 20 21 KA 1.1452963E+02 3.8417266E+00 1.0000000E+00 A3 4.8259692E04 7.3834569E04 A4 1.5476745E03 2.3232706E04 1.7065366E06 A5 5.0172623E04 1.2011765E04 A6 2.3616367E05 2.0992650E05 2.1663553E08 A7 9.8924709E06 8.7048977E06 A8 1.2594751E06 8.9448159E08 7.5361646E12 A9 7.8708984E08 2.2482665E07 A10 1.6937320E08 6.7173772E09 2.4170460E15 A11 3.1809099E10 3.2716611E09 A12 1.1757840E10 1.6714905E10 A13 5.7315864E13 2.7350053E11 A14 4.7161361E13 1.7699804E12 A15 1.4820445E16 1.3044321E13 A16 1.1040062E15 9.7629965E15 A17 2.0920832E18 3.2961550E16 A18 1.4047454E18 2.7535087E17 A19 2.1890990E21 3.4144188E19 A20 7.5289696E22 3.1475857E20 SURFACE NUMBER 22 KA 1.0000000E+00 A4 0.0000000E+00 A6 0.0000000E+00 A8 0.0000000E+00 A10 0.0000000E+00
[0119] Next, a zoom lens of Example 9 will be described.
[0120] The zoom lens of Example 9 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5. An intermediate image is formed between the first lens group G1 and the second lens group G2. The first lens group G1, third lens group G3, and fifth lens group G5 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2 and fourth lens group G4 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0121] The first lens group G1 includes ten lenses as lenses L1a to L1j. The second lens group G2 includes one lens as only a lens L2a. The third lens group G3 includes two lenses as lenses L3a and L3b. The fourth lens group G4 includes five lenses as lenses L4a to L4e. The fifth lens group G5 includes one lens as only a lens L5a.
[0122] Table 33 shows lens data of the zoom lens of Example 9, Table 34 shows data about specification, Table 35 shows surface spacings which are variable during zooming, Table 36 shows data about aspheric coefficients thereof, and
TABLE-US-00033 TABLE 33 EXAMPLE 9LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS SURFACE NUMBER OF CURVATURE SPACING n *1 80.6473 2.2663 1.69350 53.18 *2 9.1471 12.1164 *3 31.3855 1.4168 1.80610 40.88 *4 28.5427 11.0669 5 11.5837 4.0228 1.85150 40.78 6 14.1907 0.2266 7 26.1012 4.1199 1.85150 40.78 8 39.3966 2.3919 9 26.3672 0.8090 1.89286 20.36 10 42.4239 10.0949 11 130.4109 3.7052 1.49700 81.54 12 10.8701 0.7994 1.85478 24.80 13 16.7081 2.3929 14 29.6286 5.3920 1.49700 81.54 15 14.8446 0.9170 1.85478 24.80 16 383.4778 13.2031 *17 68.7066 5.4422 1.69350 53.18 *18 22.5650 DD[18] 19 172.1176 5.4189 1.85478 24.80 20 48.9826 DD[20] 21 40.0453 1.0256 1.51633 64.14 22 458.7553 4.2843 23 53.4461 1.5756 1.85478 24.80 24 31.7531 DD[24] 25 22.9231 3.2440 1.59522 67.73 26 800.8242 6.0807 27 15.1415 0.8276 1.51742 52.43 28 12.5991 1.5821 29 (STOP) 11.7693 30 17.4861 0.7915 1.85478 24.80 31 56.7446 3.2223 1.49700 81.54 32 19.8211 13.5943 33 89.4278 4.7268 1.49700 81.54 34 40.5134 DD[34] 35 85.5280 2.6501 1.89286 20.36 36 229.9919 12.3069 37 49.9717 1.51633 64.14 38
TABLE-US-00034 TABLE 34 EXAMPLE 9SPECIFICATION (d LINE) WIDE-ANGLE TELEPHOTO END END ZOOM RATIO 1.0 1.2 f 4.47 4.92 FNo. 2.51 2.57 2 [] 131.6 127.2
TABLE-US-00035 TABLE 35 EXAMPLE 9SURFACE SPACING WIDE-ANGLE TELEPHOTO END END DD[18] 24.4140 25.9129 DD[20] 38.0764 36.5775 DD[24] 25.9106 21.2419 DD[34] 0.2266 4.8953
TABLE-US-00036 TABLE 36 EXAMPLE 9ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 3 KA 1.5000009E+01 8.3138553E01 1.9546431E+00 A3 5.0192936E04 1.5397733E03 1.0217206E03 A4 1.3813260E05 1.6804737E04 1.0570408E05 A5 1.7493172E06 6.6926079E05 2.4547939E07 A6 4.5068924E08 1.1336637E05 5.0469845E08 A7 1.1460739E09 1.3346904E06 3.5471671E09 A8 5.7623835E11 1.1195069E07 2.0069276E10 A9 3.6117420E13 6.6902463E09 2.1817789E11 A10 4.9851959E14 2.9503205E10 1.6123686E12 A11 2.7350047E16 9.3509927E12 0.0000000E+00 A12 7.5312433E18 2.1179592E13 0.0000000E+00 A13 1.7597701E18 3.5736699E15 0.0000000E+00 A14 2.6076418E20 5.4826353E19 0.0000000E+00 A15 1.2760491E21 4.4435133E18 0.0000000E+00 A16 1.7839243E22 1.1322893E18 0.0000000E+00 A17 0.0000000E+00 0.0000000E+00 A18 0.0000000E+00 0.0000000E+00 SURFACE NUMBER 4 17 18 KA 2.9301508E+00 1.4999997E+01 9.2436933E+00 A3 8.7436548E04 1.9554632E04 4.8849906E04 A4 2.2674973E04 1.1658459E04 1.4274297E04 A5 8.5435837E07 1.3930629E05 5.7998387E06 A6 3.2122825E07 1.5710087E06 9.1208397E07 A7 3.4207549E08 3.7222216E07 1.2028741E07 A8 2.3164699E09 5.2246701E08 7.8678734E09 A9 3.2838785E10 3.5217221E09 5.1730820E10 A10 4.5502038E11 6.2644007E11 2.2754892E11 A11 0.0000000E+00 3.3491033E12 8.4938115E14 A12 0.0000000E+00 2.0883187E13 9.9028708E16 A13 0.0000000E+00 4.7126750E14 1.8793747E15 A14 0.0000000E+00 2.3264908E15 1.1902884E16 A15 0.0000000E+00 4.3412297E17 3.0767507E18 A16 0.0000000E+00 4.7971008E19 1.5636569E19
[0123] Next, a zoom lens of Example 10 will be described.
TABLE-US-00037 TABLE 37 EXAMPLE 10LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF SURFACE NUMBER CURVATURE SPACING n 1 43.5493 2.3077 1.48749 70.24 2 24.1070 1.8717 *3 101.3646 2.1978 1.74320 49.29 *4 10.7995 9.9458 *5 357.4973 1.3738 1.80610 40.88 *6 23.4037 6.2835 7 23.8538 0.9143 1.80610 33.27 8 150.0660 0.5495 9 17.5824 1.56883 56.04 10 0.2747 11 775.0687 3.0934 1.77250 49.60 12 32.7611 0.2203 13 22.5698 3.7803 1.85150 40.78 14 1455.2083 10.1488 15 30.0176 0.6430 1.89286 20.36 16 152.5180 6.1958 17 98.5244 4.5702 1.49700 81.54 18 10.8481 0.0169 19 10.8928 0.8802 1.85478 24.80 20 16.2185 0.0165 21 39.2965 6.1385 1.49700 81.54 22 13.9443 0.0160 23 13.9005 0.9716 1.85478 24.80 24 49.1119 12.9800 *25 691.1619 4.4427 1.69350 53.18 *26 18.8279 DD[26] 27 152.3088 5.1721 1.85478 24.80 28 52.1033 DD[28] 29 83.1611 0.8704 1.48749 70.24 30 51.7564 1.6021 31 46.4623 0.9161 1.85478 24.80 32 40.3936 DD[32] 33 23.2382 2.9106 1.59522 67.73 34 491.4993 3.8628 35 19.2688 0.7994 1.51742 52.43 36 15.2182 2.7477 37(STOP) 14.8108 38 17.9318 0.8558 1.85478 24.80 39 51.5347 0.1436 40 64.2360 3.3616 1.49700 81.54 41 23.2884 8.7646 42 95.0966 4.8923 1.49700 81.54 43 33.3077 DD[43] 44 66.3144 2.9233 1.89286 20.36 45 295.6039 11.9375 46 48.4615 1.51680 64.20 47
TABLE-US-00038 TABLE 38 EXAMPLE 10SPECIFICATION (d LINE) WIDE-ANGLE TELEPHOTO END END ZOOM RATIO 1.0 1.2 f 4.35 4.79 FNo. 2.50 2.55 2 [] 132.8 128.6
TABLE-US-00039 TABLE 39 EXAMPLE 10SURFACE SPACING WIDE-ANGLE TELEPHOTO END END DD[26] 25.5972 27.3540 DD[28] 59.0377 57.2809 DD[32] 4.8618 0.4992 DD[43] 0.2198 4.5824
TABLE-US-00040 TABLE 40 EXAMPLE 10ASPHERIC COEFFICIENT SURFACE NUMBER 3 4 5 KA 1.5000007E+01 1.4576312E+00 5.4774318E10 A3 1.7254107E03 2.7681213E03 2.6324255E04 A4 4.2496988E05 2.2037422E04 9.3099051E05 A5 5.9724591E07 7.6979219E05 9.4353221E07 A6 4.1013120E08 1.3217029E05 6.0240420E08 A7 1.9083180E09 1.5993612E06 5.2572057E09 A8 8.6390332E11 1.3905058E07 1.9081954E10 A9 1.2170722E13 8.5387731E09 2.2090743E11 A10 6.2887832E14 3.8798505E10 1.8529468E12 A11 1.6262859E15 1.2645098E11 0.0000000E+00 A12 1.3401484E16 3.0163614E13 0.0000000E+00 A13 7.9921787E19 5.3287852E15 0.0000000E+00 A14 1.2835855E19 1.8083257E17 0.0000000E+00 A15 1.5477827E20 9.4744248E18 0.0000000E+00 A16 1.0995934E21 9.1053100E19 0.0000000E+00 A17 0.0000000E+00 0.0000000E+00 A18 0.0000000E+00 0.0000000E+00 SURFACE NUMBER 6 25 26 KA 6.5347449E+00 1.5000000E+01 3.0782784E+00 A3 3.8578118E04 3.6709915E04 6.2508497E04 A4 3.4010059E04 1.3792671E04 1.6556743E04 A5 8.1669472E06 1.5029243E05 6.5113565E06 A6 6.3172104E07 1.8073384E06 1.0569726E06 A7 4.9565819E08 4.4867499E07 1.4613018E07 A8 1.9603076E09 6.5012264E08 9.5947743E09 A9 1.3817151E10 4.4991912E09 6.6740226E10 A10 9.1287309E11 8.2773681E11 3.0506800E11 A11 0.0000000E+00 4.4581574E12 8.7982206E14 A12 0.0000000E+00 2.8743608E13 1.5553915E15 A13 0.0000000E+00 6.8116372E14 2.0846754E15 A14 0.0000000E+00 3.4193021E15 1.9336142E16 A15 0.0000000E+00 7.0320149E17 4.3416058E18 A16 0.0000000E+00 1.3984129E18 6.0257943E19
[0124] Next, a zoom lens of Example 11 will be described.
TABLE-US-00041 TABLE 41 EXAMPLE 11LENS DATA (n AND ARE BASED ON d LINE) SURFACE SURFACE SURFACE NUMBER SPACING SPACING n 1 43.8581 2.3077 1.48749 70.24 2 24.1068 1.8638 *3 99.7929 2.1978 1.74320 49.29 *4 10.8115 9.9839 *5 312.1093 1.3738 1.80610 40.88 *6 23.2178 6.2608 7 24.0318 0.9157 1.80610 33.27 8 147.8776 0.5495 9 17.5824 1.56883 56.04 10 0.2747 11 643.0312 3.1011 1.77250 49.60 12 32.7815 0.2203 13 22.4774 3.7403 1.85150 40.78 14 854.0630 10.3939 15 29.6332 0.6429 1.89286 20.36 16 154.5876 5.9314 17 110.0067 4.6063 1.49700 81.54 18 10.7828 0.0169 19 10.8267 0.8801 1.85478 24.80 20 16.1231 0.0165 21 40.4879 6.0849 1.49700 81.54 22 13.8698 0.0160 23 13.8260 0.9716 1.85478 24.80 24 48.7780 12.8896 *25 339.5718 4.1532 1.69350 53.18 *26 18.9154 DD[26] 27 133.8577 5.2489 1.85478 24.80 28 53.3777 DD[28] 29 81.8394 1.4114 1.48749 70.24 30 53.0999 1.5397 31 49.3236 0.9294 1.85478 24.80 32 41.9046 DD[32] 33 23.2935 2.8683 1.59522 67.73 34 805.7511 3.8628 35 19.1716 0.8009 1.51742 52.43 36 15.0758 2.7477 37(STOP) 15.1810 38 17.9206 0.8641 1.85478 24.80 39 54.8697 0.1362 40 68.3061 3.3992 1.49700 81.54 41 23.1309 8.4139 42 96.6197 4.8727 1.49700 81.54 43 33.1682 DD[43] 44 69.3541 2.9119 1.89286 20.36 45 244.5488 11.9381 46 48.4615 1.51680 64.20 47
TABLE-US-00042 TABLE 42 EXAMPLE 11SPECIFICATION (d LINE) WIDE-ANGLE TELEPHOTO END END ZOOM RATIO 1.0 1.2 f 4.35 4.79 FNo. 2.51 2.56 2 [] 132.8 128.6
TABLE-US-00043 TABLE 43 EXAMPLE 11SURFACE SPACING WIDE-ANGLE TELEPHOTO END END DD[26] 24.5380 26.2860 DD[28] 60.0031 58.2551 DD[32] 4.8397 0.5151 DD[43] 0.2198 4.5444
TABLE-US-00044 TABLE 44 EXAMPLE 11ASPHERIC COEFFICIENT SURFACE NUMBER 3 4 5 KA 1.5000007E+01 1.4622018E+00 5.4774318E10 A3 1.7148403E03 2.7291174E03 3.1301751E04 A4 4.1139523E05 2.1553986E04 9.4372773E05 A5 6.3850074E07 7.6905221E05 9.4678795E07 A6 4.0464547E08 1.3217289E05 5.9591795E08 A7 1.9096290E09 1.5994046E06 5.2569334E09 A8 8.6629022E11 1.3905639E07 1.8770136E10 A9 9.6868845E14 8.5384690E09 2.2129787E11 A10 6.2280505E14 3.8805536E10 1.8814765E12 A11 1.8948633E15 1.2644991E11 0.0000000E+00 A12 1.3439249E16 3.0250740E13 0.0000000E+00 A13 7.0791591E19 5.2974366E15 0.0000000E+00 A14 1.3732924E19 1.9429898E17 0.0000000E+00 A15 1.570361 IE20 9.6659940E18 0.0000000E+00 A16 1.1623215E21 8.9401512E19 0.0000000E+00 A17 0.0000000E+00 0.0000000E+00 A18 0.0000000E+00 0.0000000E+00 SURFACE NUMBER 6 25 26 KA 6.7566765E+00 1.5000000E+01 3.0418931E+00 A3 4.2516546E04 3.6632389E04 6.0239257E04 A4 3.4341383E04 1.3903540E04 1.6062672E04 A5 8.7709643E06 1.5127602E05 6.2697747E06 A6 6.4274946E07 1.8190844E06 1.0489575E06 A7 4.9948030E08 4.4819984E07 1.4632565E07 A8 1.8960761E09 6.5019493E08 9.5619825E09 A9 1.5087014E10 4.4991447E09 6.6740885E10 A10 8.8464869E11 8.2697800E11 3.0560676E11 A11 0.0000000E+00 4.4572955E12 7.8188973E14 A12 0.0000000E+00 2.8767986E13 2.4318354E15 A13 0.0000000E+00 6.8102330E14 2.0393728E15 A14 0.0000000E+00 3.4187591E15 1.8984228E16 A15 0.0000000E+00 7.0543566E17 4.7701181E18 A16 0.0000000E+00 1.4069921E18 6.0103775E19
[0125] Next, a zoom lens of Example 12 will be described.
[0126] The zoom lens of Example 12 includes, in order from the magnification side, a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4. An intermediate image is formed in the first lens group G1. The first lens group G1 and the fourth lens group G4 remain stationary with respect to the reduction side imaging plane (image display surface Sim) during zooming. The second lens group G2 and the third lens group G3 are configured to move by changing spacings of the groups adjacent to each other in the direction of the optical axis during zooming.
[0127] The first lens group G1 includes fifteen lenses as lenses L1a to L1o. The second lens group G2 includes two lenses as lenses L2a and L2b. The third lens group G3 includes one lens as only a lens L3a. The fourth lens group G4 includes five lenses as lenses L4a to L4e.
[0128] Table 45 shows lens data of the zoom lens of Example 12, Table 46 shows data about specification, Table 47 shows surface spacings which are variable during zooming, Table 48 shows data about aspheric coefficients thereof, and
TABLE-US-00045 TABLE 45 EXAMPLE 12LENS DATA (n AND ARE BASED ON d LINE) SURFACE RADIUS OF SURFACE NUMBER CURVATURE SPACING n *1 26.8240 6.0086 1.49100 57.58 *2 59.2748 2.8138 3 52.9296 3.0043 1.69680 55.53 4 22.2042 6.0647 5 42.0590 3.0036 1.91082 35.25 6 14.9726 8.2664 7 47.9718 1.0645 1.67790 55.34 8 27.1712 15.6322 9 268.3152 6.0036 1.83400 37.16 10 40.7551 1.3055 11 53.4106 1.7102 1.89286 20.36 12 148.6430 21.7774 13 119.7356 1.0736 1.71736 29.52 14 25.3756 10.1677 1.49700 81.61 15 21.6515 0.2582 16 57.7764 8.2329 1.69680 55.53 17 23.7210 1.2258 1.80518 25.46 18 29.4272 7.9439 1.49700 81.61 19 49.4104 13.8069 *20 110.8875 4.0343 1.49100 57.58 *21 61.6001 12.4615 22 209.2060 7.2319 1.80518 25.46 23 54.5602 20.0085 24 24.4135 5.9549 1.80518 25.46 25 55.5728 11.5380 26 49.0525 1.1338 1.51742 52.43 27 34.2822 DD[27] 28 78.1637 1.0449 1.51633 64.14 29 38.3681 2.0222 30 105.9424 4.2918 1.80400 46.58 31 33.3591 DD[31] 32 48.2116 2.1756 1.59282 68.62 33 82.4081 DD[33] 34 24.0877 3.7248 1.53172 48.84 35 14.7601 2.7587 36(STOP) 9.0048 37 11.8748 0.7742 1.80518 25.46 38 116.7602 3.6749 1.59282 68.62 39 15.2041 0.0264 40 174.9138 4.8970 1.49700 81.61 41 20.7441 11.2230 42 46.8086 4.2888 1.89286 20.36 43 202.9853 16.3213 44 21.4592 1.51633 64.14 45
TABLE-US-00046 TABLE 46 EXAMPLE 12SPECIFICATION (d LINE) WIDE-ANGLE TELEPHOTO END END ZOOM RATIO 1.0 1.05 f 4.37 4.59 FNo. 2.04 2.04 2 [] 133.0 130.8
TABLE-US-00047 TABLE 47 EXAMPLE 12SURFACE SPACING WIDE-ANGLE TELEPHOTO END END DD[27] 5.8813 6.8588 DD[31] 18.3439 14.4762 DD[33] 7.1794 10.0696
TABLE-US-00048 TABLE 48 EXAMPLE 12ASPHERIC COEFFICIENT SURFACE NUMBER 1 2 20 KA 2.2463406E01 1.4999999E+01 1.5000000E+01 A3 6.8570926E04 1.1927392E03 4.6130151E05 A4 2.5485348E05 2.1973702E04 7.5339825E05 A5 1.8573512E06 4.9200816E05 1.0897990E05 A6 2.8410400E08 7.6434285E06 1.0577440E06 A7 8.6906023E10 8.2604595E07 2.3277578E07 A8 3.5549187E11 6.3512460E08 3.0174811E08 A9 4.0145010E14 3.5390246E09 1.8720490E09 A10 1.8478805E14 1.4456968E10 3.0442191E11 A11 2.7883496E16 4.3338360E12 1.5486017E12 A12 3.0412131E18 9.4241706E14 8.9321390E14 A13 1.1098143E19 1.4457689E15 1.8212927E14 A14 3.7350058E22 1.4824922E17 8.3312913E16 A15 1.3701679E23 9.1124161E20 1.4214044E17 A16 1.2106973E25 2.5376351E22 5.5316899E20 A17 0.0000000E+00 0.0000000E+00 A18 0.0000000E+00 0.0000000E+00 SURFACE NUMBER 21 KA 5.2188357E+00 A3 4.3502524E05 A4 9.9238678E05 A5 4.7089452E06 A6 6.8742273E07 A7 7.3453367E08 A8 4.5209514E09 A9 2.8405765E10 A10 1.1025892E11 A11 5.3554076E14 A12 1.1611812E15 A13 8.7299849E16 A14 5.1594237E17 A15 1.1107086E18 A16 9.1667645E21
[0129] Table 49 shows values corresponding to the conditional expressions (1) to (5) of the zoom lenses of Examples 1 to 12. It should be noted that, in the above-mentioned examples, the d line is set as the reference wavelength, and the values shown in the following Table 49 are values at the reference wavelength.
TABLE-US-00049 TABLE 49 EXPRESSION CONDITIONAL NUMBER EXPRESSION EXAMPLE 1 EXAMPLE 2 EXAMPLE 3 EXAMPLE 4 EXAMPLE 5 EXAMPLE 6 (1) |fw|/fA 0.135 0.123 0.126 0.121 0.123 0.004 (2) |fw|/fB 0.100 0.064 0.125 0.087 0.096 0.064 (3) fM/|fw| 7.27 7.80 7.70 8.03 7.67 12.24 (4) Ymax/|exPw| 0.03 0.04 0.03 0.04 0.04 0.05 (5) Bfw/|fw| 4.16 4.61 4.23 4.17 4.17 7.54 EXPRESSION CONDITIONAL NUMBER EXPRESSION EXAMPLE 7 EXAMPLE 8 EXAMPLE 9 EXAMPLE 10 EXAMPLE 11 EXAMPLE 12 (1) |fw|/fA 0.049 0.045 0.061 0.059 0.058 0.085 (2) |fw|/fB 0.062 0.062 0.099 0.095 0.096 0.060 (3) fM/|fw| 16.05 15.31 15.68 13.99 13.96 6.70 (4) Ymax/|exPw| 0.02 0.02 0.02 0.02 0.02 0.03 (5) Bfw/|fw| 8.01 7.87 10.12 10.08 10.08 6.96
[0130] As can be seen from the above-mentioned data, each of the zoom lenses of Examples 1 to 12 is a zoom lens of the system that satisfies conditional expressions (1) to (5) and forms an intermediate image, and is a zoom lens that has an F number as bright as 2.6 or less, has a total angle of view as a wide angle of 115 or more, and has high performance by satisfactorily suppressing fluctuation in aberrations during zooming.
[0131] Next, a projection display device according to an embodiment of the present invention will be described.
[0132] White light originating from the light source 15 is separated into rays with three colors (G light, B light, R light) through the dichroic mirrors 12 and 13. Thereafter, the rays respectively pass through the condenser lenses 16a to 16c, are incident into and modulated through the transmissive display elements 11a to 11c respectively corresponding to the rays with the respective colors, are subjected to color synthesis through the cross dichroic prism 14, and are subsequently incident into the zoom lens 10. The zoom lens 10 projects an optical image, which is formed by the light modulated through the transmissive display elements 11a to 11c, onto a screen 105.
[0133]
[0134] White light originating from the light source 215 is reflected on a reflective surface inside the polarization separating prism 25, and is separated into rays with three colors (G light, B light, R light) through the TIR prisms 24a to 24c. The separated rays with the respective colors are respectively incident into and modulated through the corresponding DMD elements 21a to 21c, travel through the TIR prisms 24a to 24c again in a reverse direction, are subjected to color synthesis, are subsequently transmitted through the polarization separating prism 25, and are incident into the zoom lens 210. The zoom lens 210 projects an optical image, which is formed by the light modulated through the DMD elements 21a to 21c, onto a screen 205.
[0135]
[0136] White light originating from the light source 315 is separated into rays with three colors (G light, B light, R light) through the dichroic mirrors 32 and 33. The separated rays with the respective colors respectively pass through the polarization separating prisms 35a to 35c, are incident into and modulated through the reflective display elements 31a to 31c respectively corresponding to the rays with the respective colors, are subjected to color synthesis through the cross dichroic prism 34, and are subsequently incident into the zoom lens 310. The zoom lens 310 projects an optical image, which is formed by the light modulated through the reflective display elements 31a to 31c, onto a screen 305.
[0137]
[0138] The camera 400 comprises a camera body 41, and a shutter button 42 and a power button 43 are provided on an upper surface of the camera body 41. Further, operation sections 44 and 45 and a display section 46 are provided on a rear surface of the camera body 41. The display section 46 is for displaying a captured image or an image within an angle of view before imaging.
[0139] An imaging aperture, through which light from an imaging target is incident, is provided at the center on the front surface of the camera body 41. A mount 47 is provided at a position corresponding to the imaging aperture. The interchangeable lens 48 is mounted on the camera body 41 with the mount 47 interposed therebetween.
[0140] In the camera body 41, there are provided an imaging element, a signal processing circuit, a recording medium, and the like. The imaging element (not shown) such as a charge coupled device (CCD) outputs a captured image signal based on a subject image which is formed through the interchangeable lens 48. The signal processing circuit generates an image through processing of the captured image signal which is output from the imaging element. The recording medium records the generated image. The camera 400 captures a still image or a moving image by pressing the shutter button 42, and records image data, which is obtained through imaging, in the recording medium.
[0141] The present invention has been hitherto described through embodiments and examples, but the zoom lens of the present invention is not limited to the above-mentioned embodiments and examples, and may be modified into various forms. For example, the radius of curvature, the surface spacing, the refractive index, and the Abbe number of each lens may be appropriately changed.
[0142] Further, the projection display device of the present invention is not limited to that of the above-mentioned configuration. For example, the used light valve and the optical member used in separation or synthesis of rays are not limited to those of the above-mentioned configuration, and may be modified into various forms.
[0143] Further, the imaging apparatus of the present invention is also not limited to the above-mentioned configurations. For example, the present invention may be applied to a single-lens reflex camera, a film camera, a video camera, and the like.
EXPLANATION OF REFERENCES
[0144] 10, 210, 310: zoom lens [0145] 11a to 11c: transmissive display element [0146] 12, 13, 32, 33: dichroic mirror [0147] 14, 34: cross dichroic prism [0148] 15, 215, 315: light source [0149] 16a to 16c: condenser lens [0150] 18a to 18c, 38: total reflection mirror [0151] 21a to 21c: DMD element [0152] 24a to 24c: TIR prism [0153] 25, 35a to 35c: polarization separating prism [0154] 31a to 31c: reflective display element [0155] 41: camera body [0156] 42: shutter button [0157] 43: power button [0158] 44, 45: operation section [0159] 46: display section [0160] 47: mount [0161] 48: interchangeable lens [0162] 49: zoom lens [0163] 100, 200, 300: projection display device [0164] 105, 205, 305: screen [0165] 400: camera [0166] G1 to G5: lens group [0167] L1a to L5a: lens [0168] PP, PP1, PP2: optical member [0169] Sim: image display surface [0170] St: aperture stop [0171] wa: on-axis rays [0172] wb: rays with maximum angle of view [0173] Z: optical axis