Camera Device

Abstract

A camera device includes a plurality of lenses and an annular body. The annular body is disposed between the object side and the plurality of lenses, between the plurality of lenses, or between the plurality of lenses and the image side. The annular body includes an annular main body, an outer circumferential portion, and an inner circumferential portion, wherein the annular main body connects to the outer circumferential portion and the inner circumferential portion, the annular main body is disposed between the outer circumferential portion and the inner circumferential portion, and the inner circumferential portion is non-circular and surrounds the optical axis to form a hole. The camera device satisfies: Dx>Dy; where Dx is a maximum dimension of the hole through which the optical axis passes, and Dy is a minimum dimension of the hole through which the optical axis passes.

Claims

1. A camera device comprising: a plurality of lenses; and an annular body; wherein the plurality of lenses and the annular body are arranged between an object side and an image side along an optical axis; wherein the annular body is disposed between the object side and the plurality of lenses, between the plurality of lenses, or between the plurality of lenses and the image side; wherein the annular body comprises an annular main body, an outer circumferential portion, and an inner circumferential portion, wherein the annular main body connects to the outer circumferential portion and the inner circumferential portion, the annular main body is disposed between the outer circumferential portion and the inner circumferential portion, and the inner circumferential portion is non-circular and surrounds the optical axis to form a hole; wherein the camera device satisfies
Dx>Dy; where Dx is a maximum dimension of the hole through which the optical axis passes, and Dy is a minimum dimension of the hole through which the optical axis passes; wherein a horizontal interval and a vertical interval are defined between the outer circumferential portion and the inner circumferential portion, and a ratio of the horizontal interval to the vertical interval is between 1.1 and 27.6.

2. The camera device as claimed in claim 1, wherein the vertical interval is between 0.112 mm and 5.55 mm.

3. The camera device as claimed in claim 2, further comprising a reflection device disposed between the object side and the plurality of lenses and the reflection device is a prism or a reflection mirror.

4. The camera device as claimed in claim 3, wherein: the outer circumferential portion is non-circular; the annular body is made of metal or polyethylene terephthalate (PET); and the annular body is manufactured by atomizing, blacking, or printing a non-effective-diameter region on one of the lenses.

5. The camera device as claimed in claim 1, wherein a shape of the inner circumferential portion is similar to that of the outer circumferential portion.

6. The camera device as claimed in claim 1, wherein the inner circumferential portion is in a shape of an oak barrel and the outer circumferential portion is also in a shape of an oak barrel.

7. The camera device as claimed in claim 5, wherein the inner circumferential portion have a shape formed by cutting out upper and lower portions of a circle.

8. The camera device as claimed in claim 5, wherein the camera device is a fixed focal length lens.

9. The camera device as claimed in claim 3, wherein the camera device satisfies at least one of following conditions:
1<Dx/Dy<28;
0<(Dx−Dy)/(Dx/2)<2;
0 mm<ΔS/(Dx/2)<8 mm;
0<(A.sub.x−ΔS)/A.sub.x<1; where A.sub.x is an area of a circle having a diameter of Dx and Δ S is a difference between the area of the circle having the diameter of Dx and a cross sectional area of the hole.

10. The camera device as claimed in claim 1, wherein the camera device satisfies at least one of following conditions:
Dh>0 mm;
0.112 mm≤Dv≤5.55 min;
1.1≤Dh/Dv≤27.6; where Dv is the vertical interval between the outer circumferential portion and the inner circumferential portion and Dh is the horizontal interval between the outer circumferential portion and the inner circumferential portion.

11. A camera device comprising: a plurality of lenses; and an annular body; wherein the plurality of lenses and the annular body are arranged between an object side and an image side along an optical axis; wherein the annular body is disposed between the object side and the plurality of lenses, between the plurality of lenses, or between the plurality of lenses and the image side; wherein the annular body comprises an annular main body, an outer circumferential portion, and an inner circumferential portion, wherein the annular main body connects to the outer circumferential portion and the inner circumferential portion, the annular main body is disposed between the outer circumferential portion and the inner circumferential portion, and the inner circumferential portion is non-circular and surrounds the optical axis to form a hole; wherein the camera device satisfies
Dx>Dy; where Dx is a maximum dimension of the hole through which the optical axis passes, and Dy is a minimum dimension of the hole through which the optical axis passes; wherein a horizontal interval and a vertical interval are defined between the outer circumferential portion and the inner circumferential portion, and the vertical interval is between 0.112 mm and 5.55 mm.

12. The camera device as claimed in claim 11, wherein a ratio of the horizontal interval to the vertical interval is between 1.1 and 27.6.

13. The camera device as claimed in claim 12, further comprising a reflection device disposed between the object side and the plurality of lenses and the reflection device is a prism or a reflection mirror.

14. The camera device as claimed in claim 13, wherein: the outer circumferential portion is non-circular; the annular body is made of metal or polyethylene terephthalate (PET); and the annular body is manufactured by atomizing, blacking, or printing a non-effective-diameter region on one of the lenses.

15. The camera device as claimed in claim 11, wherein a shape of the inner circumferential portion is similar to that of the outer circumferential portion.

16. The camera device as claimed in claim 11, wherein the inner circumferential portion is in a shape of an oak barrel and the outer circumferential portion is also in a shape of an oak barrel.

17. The camera device as claimed in claim 15, wherein the inner circumferential portion have a shape formed by cutting out upper and lower portions of a circle.

18. The camera device as claimed in claim 15, wherein the camera device is a fixed focal length lens.

19. The camera device as claimed in claim 12, wherein the camera device satisfies at least one of following conditions:
0<(Dx−Dy)/(Dx/2)<2
0 mm<ΔS/(Dx/2)<8 mm;
0<(A.sub.x−ΔS)/A.sub.x<1;
1<Dx/Dy<28; where A.sub.x is an area of a circle having a diameter of Dx and Δ S is a difference between the area of the circle having the diameter of Dx and a cross sectional area of the hole.

20. The camera device as claimed in claim 11, wherein the camera device satisfies at least one of following conditions:
Dh>0 mm;
0.112 mm≤Dv≤5.55 mm;
1.1≤Dh/Dv≤27.6; where Dv is the vertical interval between the outer circumferential portion and the inner circumferential portion and Dh is the horizontal interval between the outer circumferential portion and the inner circumferential portion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:

[0019] FIG. 1 is a diagram of the well known aperture;

[0020] FIG. 2 depicts an annular body of a camera device in accordance with a first embodiment of the invention;

[0021] FIG. 3A is a modulation transfer function diagram of the camera device in Table 1 when F-number is equal to 2.75;

[0022] FIG. 3B is a modulation transfer function diagram of the camera device in Table 1 when F-number is equal to 5.14;

[0023] FIG. 3C is a modulation transfer function diagram of the camera device in Table 1 when F-number is equal to 8.38;

[0024] FIG. 4 is an annular body diagram of a camera device in accordance with a third embodiment of the invention;

[0025] FIG. 5A is a modulation transfer function diagram of the camera device in Table 3 when F-number is equal to 2.86;

[0026] FIG. 5B is a modulation transfer function diagram of the camera device in Table 3 when F-number is equal to 5.45;

[0027] FIG. 5C is a modulation transfer function diagram of the camera device in Table 3 when F-number is equal to 8.85;

[0028] FIG. 6 is an annular body diagram of a camera device in accordance with a fifth embodiment of the invention;

[0029] FIG. 7A is a modulation transfer function diagram of the camera device in Table 5 when F-number is equal to 2.80;

[0030] FIG. 7B is a modulation transfer function diagram of the camera device in Table 5 when F-number is equal to 5.26; and

[0031] FIG. 7C is a modulation transfer function diagram of the camera device in Table 5 when F-number is equal to 8.53.

DETAILED DESCRIPTION OF THE INVENTION

[0032] The following description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.

[0033] As shown in FIG. 2, a camera device (not shown) in a first embodiment includes a plurality of lenses (not shown) and an annular body 20, which are arranged between an object side (not shown) and an image side (not shown) along an optical axis 30. The annular body can be regarded as an annular shade, which will not be repeatedly emphasized hereinafter. The annular body 20 is disposed between the object side (not shown) and the plurality of lenses (not shown). The annular body 20 includes an annular main body 201, an outer circumferential portion 202, and an inner circumferential portion 203. The outer circumferential portion 202 and the inner circumferential portion 203 include two straight edges and two arcuate edges respectively. The annular main body 201 connects to the outer circumferential portion 202 and the inner circumferential portion 203. The annular main body 201 is disposed between the outer circumferential portion 202 and the inner circumferential portion 203. The inner circumferential portion 203 is shaped like an oak barrel (non-circular) and surrounds the optical axis 30 to form a hole 2031. D1x is a maximum dimension of the hole 2031 defined by the inner circumferential portion 203 through which the optical axis 30 passes and D1y is a minimum dimension of the hole 2031 defined by the inner circumferential portion 203 through which the optical axis 30 passes. The hole 2031 allows the light rays from the object side (not shown) to pass through, and its dimension will affect the amount of the light rays passing through the camera device (not shown). Therefore, the main purpose of the annular body 20 is to work as an aperture. When the maximum dimension D1x of the hole 2031 is fixed, the annular body 20 will be flatter if the minimum dimension D1y which is smaller than the maximum dimension D1x is reduced. Therefore, if the flattened annular body 20 is included in a general lens assembly or a periscopic lens assembly, then the thickness of the lens assembly can be effectively reduced.

[0034] The F-number of a camera device is equal to the effective focal length (f) divided by the entrance pupil diameter (D), and the mathematical equation can be represented by F-number=f/D. Since the entrance pupil area A is equal to π×(D/2).sup.2, F-number=f/D can be rewritten as F-number=f/2×(π/A).sup.1/2. Therefore, the larger the entrance pupil area A, the smaller the F-number when the effective focal length (f) of the camera device is the same.

[0035] Table 1 shows data for the camera device of the first embodiment of the invention, wherein f is fixed to 15 mm, D1x is fixed to 5.55 mm, and A1.sub.x is fixed to 24.1799625 mm.sup.2, f is an effective focal length of the camera device (not shown), D1x is a maximum dimension of the hole 2031 defined by the inner circumferential portion 203 through which the optical axis 30 passes, D1y is a minimum dimension of the hole 2031 defined by the inner circumferential portion 203 through which the optical axis 30 passes, A1.sub.x is an area of a circle having a diameter of D1x and ΔS1 is a difference between the area of the circle having the diameter of D1x and a cross sectional area of the hole 2031. If D1y ranges from 5 mm to 0.5 mm, then F-number ranges from 2.75 to 8.38, D1x/D1y ranges from 1.11 to 11.1, (D1x−D1y)/(D1x/2) ranges from 0.198198198 to 1.81981982, ΔS1/(D1x/2) ranges from 0.317175676 mm to 7.808527027 mm, and (A1.sub.x−ΔS1)/A1.sub.x ranges from 0.963599509 to 0.103858722.

TABLE-US-00001 TABLE 1 Effective focal Length = 15 mm D1x = 5.55 mm A1.sub.x = 24.1799625 mm.sup.2 D1y Hole Area Δ S1 Δ S1/(D1x/2) (mm) D1x/D1y (D1x − D1y)/(D1x/2) (mm.sup.2) (mm.sup.2) (mm) (A1.sub.x − Δ S1)/A1.sub.x F-number 5 1.11 0.198198198 23.2998 0.8801625 0.317175676 0.963599509 2.75 4.44 1.25 0.4 21.6741 2.5058625 0.903013514 0.896366154 2.85 4 1.3875 0.558558559 20.0904 4.0895625 1.473716216 0.830869775 2.96 2 2.775 1.279279279 10.05 14.1299625 5.091878378 0.415633399 4.19 1.33 4.172932331 1.520720721 6.67 17.5099625 6.309896396 0.275848236 5.14 1 5.55 1.63963964 5.02 19.1599625 6.904490991 0.207609917 5.93 0.8 6.9375 1.711711712 4.02 20.1599625 7.264851351 0.16625336 6.62 0.67 8.28358209 1.758558559 3.35 20.8299625 7.506292793 0.138544466 7.26 0.57 9.736842105 1.794594595 2.87 21.3099625 7.679265766 0.118693319 7.84 0.5 11.1 1.81981982 2.5113 21.6686625 7.808527027 0.103858722 8.38 D1x: a maximum dimension of the hole 2031 through which the optical axis 30 passes D1y: a minimum dimension of the hole 2031 through which the optical axis 30 passes A1.sub.x: an area of a circle having a diameter of D1x Δ S1: a difference between the area of the circle having the diameter of D1x and a cross sectional area of the hole 2031

[0036] FIG. 3A shows the modulation transfer function diagram of the camera device in Table 1 when F-number is equal to 2.75. FIG. 3B shows the modulation transfer function diagram of the camera device in Table 1 when F-number is equal to 5.14. FIG. 3C shows the modulation transfer function diagram of the camera device in Table 1 when F-number is equal to 8.38.

[0037] Table 2 shows data for the camera device of the second embodiment (figure is the same as FIG. 2) of the invention, wherein f is fixed to 5.09389 mm, D1x is fixed to 3.0872 mm, and A1.sub.x is fixed to 7.481681014 mm.sup.2, If D1y ranges from 2.234 mm to 0.112 mm, then F-number ranges from 1.80 to 8.07, D1x/D1y ranges from 1.381915846 to 27.56428751, (D1x−D1y)/(D1x/2) ranges from 0.552733869 to 1.927442343, ΔS1/(D1x/2) ranges from 0.786266529 mm to 4.644779097 mm, and (A1.sub.x−ΔS1)/A1.sub.x ranges from 0.837779636 to 0.041701858.

TABLE-US-00002 TABLE 2 Effective focal Length = 5.09389 mm D1x = 3.0872 mm A1.sub.x = 7.481681014 mm.sup.2 D1y Hole Area Δ S1 Δ S1/(D1x/2) (mm) D1x/D1y (D1x − D1y)/(D1x/2) (mm.sup.2) (mm.sup.2) (mm) (A1.sub.x − Δ S1)/A1.sub.x F-number 2.234 1.381915846 0.552733869 6.268 1.213681014 0.786266529 0.837779636 1.80 1.11 2.781261261 1.280901788 3.11 4.371681014 2.832133334 0.415681983 2.55 0.744 4.149462366 1.518009847 2.088 5.393681014 3.494221958 0.279081666 3.12 0.56 5.512857143 1.637211713 1.56 5.921681014 3.836279486 0.20850929 3.61 0.44 7.016363636 1.71495206 1.24 6.241681014 4.043587079 0.165738154 4.05 0.372 8.298924731 1.759004924 1.044 6.437681014 4.170562979 0.139540833 4.41 0.32 9.6475 1.792692407 0.892 6.589681014 4.269034086 0.119224543 4.77 0.278 11.10503597 1.819901529 0.78 6.701681014 4.341591743 0.104254645 5.11 0.248 12.4483871 1.839336616 0.696 6.785681014 4.396009986 0.093027222 5.40 0.22 14.03272727 1.85747603 0.6 6.881681014 4.458202264 0.080195881 5.82 0.148 20.85945946 1.904120238 0.416 7.065681014 4.57740413 0.055602477 6.99 0.112 27.56428571 1.927442343 0.312 7.169681014 4.644779097 0.041701858 8.07 D1x: a maximum dimension of the hole 2031 through which the optical axis 30 passes D1y: a minimum dimension of the hole 2031 through which the optical axis 30 passes A1.sub.x: an area of a circle having a diameter of D1x Δ S1: a difference between the area of the circle having the diameter of D1x and a cross sectional area of the hole 2031

[0038] The modulation transfer function diagram of the camera device at different F-numbers in Table 2 is similar to in Table 1, so the illustration is omitted.

[0039] As shown in FIG. 4, a camera device (not shown) in a third embodiment includes a plurality of lenses (not shown) and an annular body 40, which are arranged between an object side (not shown) and an image side (not shown) along an optical axis 50. The annular body 40 can be regarded as an annular shade, which will not be repeatedly emphasized hereinafter. The annular body 40 is disposed between the object side (not shown) and the plurality of lenses (not shown). The annular body 40 includes an annular main body 401, an outer circumferential portion 402, and an inner circumferential portion 403. The outer circumferential portion 402 includes two straight edges and two arcuate edges. The inner circumferential portion 403 includes six straight edges. The annular main body 401 connects to the outer circumferential portion 402 and the inner circumferential portion 403. The annular main body 401 is disposed between the outer circumferential portion 402 and the inner circumferential portion 403. The inner circumferential portion 403 is hexagonal (non-circular) and surrounds the optical axis 50 to form a hole 4031. D2x is a maximum dimension of the hole 4031 defined by the inner circumferential portion 403 through which the optical axis 50 passes and D2y is a minimum dimension of the hole 4031 defined by the inner circumferential portion 403 through which the optical axis 50 passes. The hole 4031 allows the light rays from the object side (not shown) to pass through, and its dimension will affect the amount of the light rays passing through the camera device (not shown). Therefore, the main purpose of the annular body 40 is to work as an aperture. When the maximum dimension D2x of the hole 4031 is fixed, the annular body 40 will be flatter if the minimum dimension D2y which is smaller than the maximum dimension D2x is reduced. Therefore, if the flattened annular body 40 is included in a general lens assembly or a periscopic lens assembly, then the thickness of the lens assembly can be effectively reduced.

[0040] Table 3 shows data for the camera device of the third embodiment of the invention, wherein f is fixed to 15 mm, D2x is fixed to 5.55 mm, A2.sub.x is fixed to 24.1799625 mm.sup.2, f is an effective focal length of the camera device (not shown), D2x is a maximum dimension of the hole 4031 defined by the inner circumferential portion 403 through which the optical axis 50 passes, D2y is a minimum dimension of the hole 4031 defined by the inner circumferential portion 403 through which the optical axis 50 passes, A2.sub.x is an area of a circle having a diameter of D2x and Δ S2 is a difference between the area of the circle having the diameter of D2x and a cross sectional area of the hole 4031. If D2y ranges from 5 mm to 0.5 mm, then F-number ranges from 2.86 to 8.85, D2x/D2y ranges from 1.11 to 11.1, (D2x−D2y)/(D2x/2) ranges from 0.198198198 to 1.81981982, Δ S2/(D2x/2) ranges from 0.965752252 mm to 7.902328829 mm, and (A2.sub.x−Δ S2)/A2.sub.x ranges from 0.889165978 to 0.09309361.

TABLE-US-00003 TABLE 3 Effective focal Length = 15 mm D2x = 5.55 mm A2.sub.x = 24.1799625 mm.sup.2 D2y Hole Area Δ S2 Δ S2/(D2x/2) (mm) D2x/D2y (D2x − D2y)/(D2x/2) (mm.sup.2) (mm.sup.2) (mm) (A2.sub.x − Δ S2)/A2.sub.x F-number 5 1.11 0.198198198 21.5 2.6799625 0.965752252 0.889165978 2.86 4.44 1.25 0.4 19.7136 4.4663625 1.6095 0.815286624 2.99 4 1.3875 0.558558559 18.2 5.9799625 2.154941441 0.752689339 3.11 2 2.775 1.279279279 9.103 15.0769625 5.43313964 0.376468739 4.40 1.33 4.172932331 1.520720721 5.935 18.2449625 6.574761261 0.245451166 5.45 1 5.55 1.63963964 4.5224 19.6575625 7.083806306 0.187030894 6.24 0.8 6.9375 1.711711712 3.6945 20.4854625 7.382148649 0.1527918 6.91 0.67 8.28358209 1.758558559 2.9813 21.1986625 7.639157658 0.123296304 7.69 0.57 9.736842105 1.794594595 2.576 21.6039625 7.785211712 0.106534491 8.28 0.5 11.1 1.81981982 2.251 21.9289625 7.902328829 0.09309361 8.85 D2x: a maximum dimension of the hole 4031 through which the optical axis 50 passes D2y: a minimum dimension of the hole 4031 through which the optical axis 50 passes A2.sub.x: an area of a circle having a diameter of D2x Δ S2: a difference between the area of the circle having the diameter of D2x and a cross sectional area of the hole 4031

[0041] FIG. 5A shows the modulation transfer function diagram of the camera device in Table 3 when F-number is equal to 2.86, FIG. 5B shows the modulation transfer function diagram of the camera device in Table 3 when F-number is equal to 5.45. FIG. 5C shows the modulation transfer function diagram of the camera device in Table 3 when F-number is equal to 8.85.

[0042] Table 4 shows data for the camera device of the fourth embodiment (figure is the same as FIG. 4) of the invention, wherein f is fixed to 5.09389 mm, D2x is fixed to 3.0872 mm, and A2.sub.x is fixed to 7.481681014 mm.sup.2. If D2y ranges from 2,234 mm to 0.112 mm, then F-number ranges from 1.98 to 8.86, D2x/D2y ranges from 1.381915846 to 27.56428751, (D2x−D2y)/(D2x/2) ranges from 0.552733869 to 1.927442343, Δ S2/(D2x/2) ranges from 1.495906332 mm to 4.678920066 mm, and (A2.sub.x−Δ S2)/A2.sub.x ranges from 0.69136869 to 0.034657987.

TABLE-US-00004 TABLE 4 Effective focal Length = 5.09389 mm D2x = 3.0872 mm A2.sub.x = 7.481681014 mm.sup.2 D2y Hole Area Δ S2 Δ S2/(D2x/2) (mm) D2x/D2y (D2x − D2y)/(D2x/2) (mm.sup.2) (mm.sup.2) (mm) (A2.sub.x − Δ S2)/A2.sub.x F-number 2.234 1.381915846 0.552733869 5.1726 2.309081014 1.495906332 0.69136869 1.98 1.11 2.781261261 1.280901788 2.57 4.911681014 3.181964897 0.34350569 2.81 0.744 4.149462366 1.518009847 1.722 5.759681014 3.731330017 0.230162178 3.43 0.56 5.512857143 1.637211713 1.296 6.185681014 4.00730825 0.173223103 3.96 0.44 7.016363636 1.71495206 1.018 6.463681014 4.187406721 0.136065678 4.47 0.372 8.298924731 1.759004924 0.861 6.620681014 4.289117009 0.115081089 4.86 0.32 9.6475 1.792692407 0.741 6.740681014 4.366857356 0.099041913 5.24 0.278 11.10503597 1.819901529 0.643 6.838681014 4.430345306 0.085943252 5.62 0.248 12.4483871 1.839336616 0.574 6.907681014 4.475046006 0.076720726 5.95 0.22 14.03272727 1.85747603 0.509 6.972681014 4.51715536 0.068032839 6.32 0.148 20.85945946 1.904120238 0.3426 7.139081014 4.624955309 0.045791848 7.71 0.112 27.56428571 1.927442343 0.2593 7.222381014 4.678920066 0.034657987 8.86 D2x: a maximum dimension of the hole 4031 through which the optical axis 50 passes D2y: a minimum dimension of the hole 4031 through which the optical axis 50 passes A2.sub.x: an area of a circle having a diameter of D2x Δ S2: a difference between the area of the circle having the diameter of D2x and a cross sectional area of the hole 4031

[0043] The modulation transfer function diagram of the camera device at different F-numbers in Table 4 is similar to in Table 3, so the illustration is omitted.

[0044] As shown in FIG. 6, a camera device (not shown) in a fifth embodiment includes a plurality of lenses (not shown) and an annular body 60, which are arranged between an object side (not shown) and an image side (not shown) along an optical axis 70. The annular body 60 can be regarded as an annular shade, which will not be repeatedly emphasized hereinafter. The annular body 60 is disposed between the object side (not shown) and the plurality of lenses (not shown). The annular body 60 includes an annular main body 601, an outer circumferential portion 602, and an inner circumferential portion 603. The outer circumferential portion 602 and the inner circumferential portion 603 include eight straight edges respectively. The annular main body 601 connects to the outer circumferential portion 602 and the inner circumferential portion 603. The annular main body 601 is disposed between the outer circumferential portion 602 and the inner circumferential portion 603. The inner circumferential portion 603 is octagonal (non-circular) and surrounds the optical axis 70 to form a hole 6031. D3x is a maximum dimension of the hole 6031 defined by the inner circumferential portion 603 through which the optical axis 70 passes and D3y is a minimum dimension of the hole 6031 defined by the inner circumferential portion 603 through which the optical axis 70 passes. The hole 6031 allows the light rays from the object side (not shown) to pass through, and its dimension will affect the amount of the light rays passing through the camera device (not shown). Therefore, the main purpose of the annular body 60 is to work as an aperture. When the maximum dimension D3x of the hole 6031 is fixed, the annular body 60 will be flatter if the minimum dimension D3y which is smaller than the maximum dimension D3x is reduced. Therefore, if the flattened annular body 60 is included in a general lens assembly or a periscopic lens assembly, then the thickness of the lens assembly can be effectively reduced. The above camera device (not shown) may further includes a reflection device disposed between the object side (not shown) and the plurality of lenses (not shown), wherein the reflection device may be a prism or a reflection mirror.

[0045] Table 5 shows data for the camera device of the fifth embodiment of the invention, wherein f is fixed to 15 mm, D3x is fixed to 5.55 mm, and A3.sub.x is fixed to 24.1799625 mm.sup.2, f is an effective focal length of the camera device (not shown), D3x is a maximum dimension of the hole 6031 defined by the inner circumferential portion 603 through which the optical axis 70 passes, D3y is a minimum dimension of the hole 6031 defined by the inner circumferential portion 603 through which the optical axis 70 passes, A3.sub.x is an area of a circle having a diameter of D3x and Δ S3 is a difference between the area of the circle having the diameter of D3x and a cross sectional area of the hole 6031. If D3y ranges from 5 mm to 0.5 mm, then F-number ranges from 2.80 to 8.53, D3x/D3y ranges from 1.11 to 11.1, (D3x−D3y)/(D3x/2) ranges from 0.198198198 to 1.81981982, Δ S3/(D3x/2) ranges from 0.602364865 mm to 7.840346847 mm, and (A3.sub.x−Δ S3)/A3.sub.x ranges from 0.93086993 to 0.100206938.

TABLE-US-00005 TABLE 5 Effective focal Length = 15 mm D3x = 5.55 mm A3.sub.x = 24.1799625 mm.sup.2 D3y Hole Area Δ S3 Δ S3/(D3x/2) (mm) D3x/D3y (D3x − D3y)/(D3x/2) (mm.sup.2) (mm.sup.2) (mm) (A3.sub.x − Δ S3)/A3.sub.x F-number 5 1.11 0.198198198 22.5084 1.6715625 0.602364865 0.93086993 2.80 4.44 1.25 0.4 20.7599 3.4200625 1.232454955 0.85855799 2.91 4 1.3875 0.558558559 19.2229 4.9570625 1.786328829 0.794992962 3.03 2 2.775 1.279279279 9.418 14.7619625 5.319626126 0.389496055 4.33 1.33 4.172932331 1.520720721 6.367 17.8129625 6.419085586 0.263317199 5.26 1 5.55 1.63963964 4.852 19.3279625 6.965031532 0.200662015 6.03 0.8 6.9375 1.711711712 3.871 20.3089625 7.318545045 0.160091233 6.75 0.67 8.28358209 1.758558559 3.244 20.9359625 7.544490991 0.134160671 7.37 0.57 9.736842105 1.794594595 2.739 21.4409625 7.726472973 0.11327561 8.03 0.5 11.1 1.81981982 2.423 21.7569625 7.840346847 0.100206938 8.53 D3x: a maximum dimension of the hole 6031 through which the optical axis 70 passes D3y: a minimum dimension of the hole 6031 through which the optical axis 70 passes A3.sub.x: an area of a circle having a diameter of D3x Δ S3: a difference between the area of the circle having the diameter of D3x and a cross sectional area of the hole 6031

[0046] FIG. 7A shows the modulation transfer function diagram of the camera device in Table 5 when F-number is equal to 2.80, FIG. 7B shows the modulation transfer function diagram of the camera device in Table 5 when F-number is equal to 5.26. FIG. 7C shows the modulation transfer function diagram of the camera device in Table 5 when F-number is equal to 8.53.

[0047] Table 6 shows data for the camera device of the sixth embodiment (figure is the same as FIG. 6) of the invention, wherein f is fixed to 5.09389 mm, D3x is fixed to 3.0872 mm, and A3.sub.x is fixed to 7.481681014 mm.sup.2. If D3y ranges from 2.234 mm to 0.112 mm, then F-number ranges from 1.84 to 8.28, D3x/D3y ranges from 1.381915846 to 27.56428571, (D3x-D3y)/(D3x/2) ranges from 0.552733869 to 1.927442343, Δ S3/(D3x/2) ranges from 0.990982777 mm to 4.654496641 mm, and (A3.sub.x−Δ S3)/A3.sub.x ranges from 0.795543139 to 0.039696961.

TABLE-US-00006 TABLE 6 Effective focal Length = 5.09389 mm D3x = 3.0872 mm A3.sub.x = 7.481681014 mm.sup.2 D3y Hole Area Δ S3 Δ S3/(D3x/2) (mm) D3x/D3y (D3x − D3y)/(D3x/2) (mm.sup.2) (mm.sup.2) (mm) (A3.sub.x − Δ S3)/A3.sub.x F-number 2.234 1.381915846 0.552733869 5.952 1.529681014 0.990982777 0.795543139 1.84 1.11 2.781261261 1.280901788 2.816 4.665681014 3.022597185 0.376386001 2.68 0.744 4.149462366 1.518009847 1.953 5.528681014 3.581679849 0.261037593 3.22 0.56 5.512857143 1.637211713 1.469 6.012681014 3.895232583 0.196346249 3.72 0.44 7.016363636 1.71495206 1.137 6.344681014 4.11031421 0.151971194 4.23 0.372 8.298924731 1.759004924 0.936 6.545681014 4.240529292 0.125105574 4.66 0.32 9.6475 1.792692407 0.824 6.657681014 4.313086949 0.110135677 4.97 0.278 11.10503597 1.819901529 0.715 6.766681014 4.383701098 0.095566758 5.33 0.248 12.4483871 1.839336616 0.6342 6.847481014 4.436046265 0.084767046 5.66 0.22 14.03272727 1.85747603 0.5582 6.923481014 4.485281818 0.074608901 6.04 0.148 20.85945946 1.904120238 0.388 7.093681014 4.595543544 0.051860003 7.24 0.112 27.56428571 1.927442343 0.297 7.184681014 4.654496641 0.039696961 8.28 D3x: a maximum dimension of the hole 6031 through which the optical axis 70 passes D3y: a minimum dimension of the hole 6031 through which the optical axis 70 passes A3.sub.x: an area of a circle having a diameter of D3x Δ S3: a difference between the area of the circle having the diameter of D3x and a cross sectional area of the hole 6031

[0048] The modulation transfer function diagram of the camera device at different F-numbers in Table 6 is similar to in Table 5, so the illustration is omitted.

[0049] In each of the above embodiments, the annular body can be made of metal, polyethylene terephthalate (PET), or manufactured by atomizing, blacking or printing a non-effective-diameter region on any of the lenses.

[0050] In each of the above embodiments, the annular body is disposed between the object side and the plurality of lenses. However, it has the same effect and falls into the scope of the invention that the annular body is disposed between the plurality of lenses or between the plurality of lenses and the image side.

[0051] In the first embodiment, the outer circumferential portion 202 and the inner circumferential portion 203 of FIG. 2 are similar in shape. When the shape and the dimension of the inner circumferential portion 203 are fixed, the dimension of the outer circumferential portion 202 can be arbitrarily adjusted, which means that the interval between the outer circumferential portion 202 and the inner circumferential portion 203 may be any values greater than 0 without affecting the optical properties of the camera device, and should be within the scope of the invention.

[0052] In the fifth embodiment, the outer circumferential portion 602 and the inner circumferential portion 603 of FIG. 6 are similar in shape. When the shape and the dimension of the inner circumferential portion 603 are fixed, the dimension of the outer circumferential portion 602 can be arbitrarily adjusted, which means that the interval between the outer circumferential portion 602 and the inner circumferential portion 603 may be any values greater than 0 without affecting the optical properties of the camera device, and should be within the scope of the invention.

[0053] In the third embodiment, the outer circumferential portion 402 and the inner circumferential portion 403 of FIG. 4 are different in shape. A horizontal interval Dh and a vertical interval Dv are defined between the outer circumferential portion 402 and the inner circumferential portion 403. When the shape and dimension of the inner circumferential portion 403 are fixed, the dimension of the outer circumferential portion 402 can be adjusted, which means that the horizontal interval Dh and the vertical interval Dv may be any values greater than 0, and the optical properties of the camera device are not affected. During the adjustment of the vertical interval Dv, a preferred vertical interval of the outer circumferential portion 402 is between 0.112 mm and 5.55 mm, and at this time of the adjustment of the horizontal interval Dh, the ratio of the preferred horizontal interval to the preferred vertical interval of the outer circumferential portion 402 is between 1.1 and 27.6, which should be within the scope of the invention.

[0054] In FIG. 4, the horizontal interval Dh satisfies: Dh>0 mm, the vertical interval Dv satisfies: 0.112 mm≤Dv≤5.55 mm, and the ratio Dh/Dv of the horizontal interval to the vertical interval satisfies: 1.1≤Dh/Dv≤27.6, wherein Dh is a horizontal interval between the outer circumferential portion and the inner circumferential portion and Dv is a vertical interval between the outer circumferential portion and the inner circumferential portion.

[0055] In the above embodiments, it is also possible to connect the annual body to any of the lenses of the plurality of lenses, so that any of the lenses of the plurality of lenses includes the annular body, and should be within the scope of the invention.

[0056] While the invention has been described by way of example and in terms of the preferred embodiment(s), it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.