USRE46262EExpiredUtilityPatentIndex 51
Optical imaging system
Est. expiryJul 7, 2025(expired)· nominal 20-yr term from priority
G02B 9/36G02B 13/004G02B 9/34G02B 5/20G03B 30/00G02B 13/18
51
PatentIndex Score
0
Cited by
20
References
63
Claims
Abstract
An optical imaging system is provided comprising a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive or negative power; and a fourth lens group having a positive or negative power.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. An optical imaging system comprising an image sensor for photoelectric conversion, the optical imaging system further comprising:
a first lens group having a positive refractive power closest to a subject; a second lens group closest to the first lens group and having a negative refractive power; a third lens group having one of a positive or negative power; and a fourth lens group having one of a positive or negative power, wherein each of the first to fourth lens groups comprises an aspheric lens having at least one aspheric surface thereof; and one of a thin film filter or an optical filter for restricting the transmission of a portion of light between the second and third lens groups or between the third and fourth lens groups.
2. An optical imaging system according to claim 1 , wherein the first lens group comprises at least one lens of a positive refractive power.
3. An optical imaging system according to claim 1 , wherein the second lens group comprises at least one lens of a negative refractive power.
4. An optical imaging system according to claim 1 , wherein the third lens group comprises at least one lens of a positive or negative refractive power.
5. An optical imaging system according to claim 1 , wherein a fourth lens group comprises at least one lens of a positive or negative refractive power.
6. An optical imaging system according to claim 1 , wherein the optical imaging system satisfies
0.3
<
f
1
f
<
3.1
,
wherein f denotes synthetic focus distance of the optical imaging system and f 1 denotes focus distance of the first lens group.
7. An optical imaging system according to claim 1 , wherein the optical imaging system satisfies
0.3
<
f
2
f
<
8.99
,
wherein f denotes a synthetic focus distance of the optical imaging system and f 2 denotes a focus distance of the second lens group.
8. An optical imaging system according to claim 1 , wherein the optical imaging system satisfies
0.19
<
f
3
f
<
∞
,
wherein f denotes a synthetic focus distance of the optical imaging system and f 3 denotes a focus distance of the third lens group.
9. An optical imaging system according to claim 1 , wherein the optical imaging system satisfies
0.15
<
f
4
f
<
∞
,
wherein f denotes a synthetic focus distance of the optical imaging system and f 4 denotes a focus distance of the second lens group.
10. An optical imaging system comprising an image sensor for photoelectric conversion, the optical imaging system further comprising:
a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having one of a positive or negative power; and a fourth lens group having one of a positive or negative power, wherein the optical imaging system satisfies
0.45
<
f
TTL
<
1.01
,
wherein f denotes a synthetic focus distance of die optical imaging system and TTL denotes a distance from an iris surface to an imaging surface;
wherein a lens located in the first lens group and having at least one aspheric surface; and
one of a thin film filter or an optical filter for restricting the transmission of a portion of light between the second and third lens groups or between the third and fourth lens groups.
11. An optical imaging system according to claim 10 , further comprising a parallel flat glass disposed between the image sensor and the fourth lens group.
12. An optical imaging system comprising an image sensor for photoelectric conversion, the optical imaging system further comprising:
a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having one of a positive or negative power; and a fourth lens group having one of a positive or negative power, wherein the first and second lens groups satisfy an optical axis direction size according to
0
<
d
1
TTL
<
0.26
,
wherein d 1 denotes a separated distance between the first lens group and the second lens group on the optical axis and TTL denotes a distance from an iris surface to an imaging surface;
wherein a lens located in the first lens group and having at least one aspheric surface; and
one of a thin film filter or an optical filter for restricting the transmission of a portion of light between the second and third lens groups or between the third and fourth lens groups.
13. An optical imaging system according to claim 12 , further comprising a parallel flat glass disposed between the image sensor and the fourth lens group.
14. An optical imaging system comprising an image sensor for photoelectric conversion, the optical imaging system further comprising:
a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having one of a positive or negative power; and a fourth lens group having one of a positive or negative power, wherein the third and fourth lens groups satisfy an optical axis direction size according to
0
<
d
3
TTL
<
0.40
,
wherein d 3 denotes a separated distance between the third lens group and the fourth lens group on the optical axis and TIL denotes a distance from an iris surface to an imaging surface;
wherein a lens located in the first lens group and having at least one aspheric surface; and
one of a thin film filter or an optical filter for restricting the transmission of a portion of light between the second and third lens groups or between the third and fourth lens groups.
15. An optical imaging system according to claim 14 , further comprising a parallel flat glass disposed between the image sensor and the fourth lens group.
16. An optical imaging system comprising an image sensor for photoelectric conversion, the optical imaging system further comprising:
a first lens group having a positive refractive power closest to a subject; a second lens group closest to the first lens group and having a negative refractive power; a third lens group having one of a positive or negative power; and a fourth lens group having one of a positive or negative power, wherein each of the first to fourth lens groups comprises an aspheric lens having at least one aspheric surface thereof, and wherein the Abbe's numbers of the first and second lens groups G 1 and G 2 satisfy
28.2<ν1−ν2<42.8,
wherein ν 1 and ν 2 denote Abbe's numbers representing the distribution characteristics of the first and second lens groups respectively.
17. An optical imaging system comprising:
a first lens group comprising a first lens with an object side surface having a positive curvature, and having a positive refractive power; a second lens group comprising a second lens with an object side surface having a positive curvature and with an image side surface having a positive curvature, and having a negative refractive power; a third lens with an object side surface having a negative curvature and with an image side surface having a negative curvature, and having one of a positive or negative refractive power; and a fourth lens having a negative refractive power, wherein each of the first lens group, the second lens group, the third lens, and the fourth lens comprises an aspheric lens having at least one aspheric surface thereof, wherein the optical imaging system satisfies the following equation:
28.2<ν 1 −ν 2 <42.8,
wherein ν 1 and ν 2 denote Abbe's numbers representing dispersion characteristics of the first lens group and the second lens group, respectively.
18. The optical imaging system of claim 17, wherein an object side surface and an image side surface of the fourth lens are aspheric.
19. The optical imaging system of claim 17, wherein the fourth lens is a lens with an object side surface having a positive curvature and with an image side surface having a positive curvature.
20. The optical imaging system of claim 19, wherein a sign of a curvature is changed when at least one of the object side surface and the image side surface of the fourth lens is distant from an optical axis.
21. The optical imaging system of claim 17, wherein the first lens comprises an image side surface having one of a negative or positive curvature.
22. The optical imaging system of claim 17, wherein the first lens and the second lens contact each other.
23. The optical imaging system of claim 17, wherein each of the first through fourth lenses comprises at least one aspheric surface.
24. The optical imaging system of claim 17, wherein the optical imaging system satisfies the following equation:
0.45
<
f
TTL
<
1.01
,
wherein f denotes a total focal length of the optical imaging system and TTL denotes a distance from an iris surface to an imaging surface.
25. The optical imaging system of claim 17, wherein the optical imaging system satisfies the following equation:
0.3
<
f
1
f
<
3.1
,
0.3
<
f
2
f
<
8.99
,
wherein f denotes a total focal length of the optical imaging system, f 1 denotes a focal length of the first lens, and f 2 denotes a focal length of the second lens.
26. The optical imaging system of claim 17, wherein the optical imaging system satisfies the following equation:
0.19
<
f
3
f
<
∞
,
0.15
<
f
4
f
<
∞
,
wherein f denotes a total focal length of the optical imaging system, f 3 denotes a focal length of the third lens, and f 4 denotes a focal length of the fourth lens.
27. The optical imaging system of claim 17, wherein an iris is disposed at an object side of the first lens.
28. The optical imaging system of claim 17, wherein the optical imaging system satisfies the following equation:
0
<
d
1
TTL
<
0.26
,
wherein d 1 denotes a separated distance between the first lens and the second lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface.
29. The optical imaging system of claim 17, wherein the optical imaging system satisfies the following equation:
0
<
d
3
TTL
<
0.40
,
wherein d 3 denotes a separated distance between the third lens and the fourth lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface.
30. An optical imaging system comprising:
a first lens group comprising a first lens with an object side surface having a positive curvature, and having a positive refractive power; a second lens group comprising a second lens with an object side surface having a positive curvature and with an image side surface having a positive curvature, and having a negative refractive power; a third lens having one of a positive or negative refractive power; and a fourth lens having a negative refractive power, and comprising at least one aspheric surface, wherein each of the first lens group, the second lens group, the third lens, and the fourth lens comprises an aspheric lens having at least one aspheric surface thereof, wherein the optical imaging system satisfies the following equation:
28.2<ν 1 −ν 2 <42.8,
wherein ν 1 and ν 2 denote Abbe's numbers representing dispersion characteristics of the first lens group and the second lens group, respectively.
31. The optical imaging system of claim 30, wherein the object side surface of the fourth lens has a positive curvature, and the image side surface of the fourth lens has a positive curvature.
32. The optical imaging system of claim 30, wherein a sign of a curvature is changed when at least one of the object side surface and the image side surface of the fourth lens is distant from an optical axis.
33. The optical imaging system of claim 30, wherein the first lens comprises an image side surface having one of a negative or positive curvature.
34. The optical imaging system of claim 30, wherein the first lens and the second lens contact each other.
35. The optical imaging system of claim 30, wherein each of the first through third lenses comprises at least one aspheric surface.
36. The optical imaging system of claim 30, wherein the optical imaging system satisfies the following equation:
0.45
<
f
TTL
<
1.01
,
wherein f denotes a total focal length of the optical imaging system and TTL denotes a distance from an iris surface to an imaging surface.
37. The optical imaging system of claim 30, wherein the optical imaging system satisfies the following equation:
0.3
<
f
1
f
<
3.1
,
0.3
<
f
2
f
<
8.99
,
wherein f denotes a total focal length of the optical imaging system, f 1 denotes a focal length of the first lens, and f 2 denotes a focal length of the second lens.
38. The optical imaging system of claim 30, wherein the optical imaging system satisfies the following equation:
0.19
<
f
3
f
<
∞
,
0.15
<
f
4
f
<
∞
,
wherein f denotes a total focal length of the optical imaging system, f 3 denotes a focal length of the third lens, and f 4 denotes a focal length of the fourth lens.
39. The optical imaging system of claim 30, wherein an iris is disposed at on object side of the first lens.
40. The optical imaging system of claim 30, wherein the optical imaging system satisfies the following equation:
0
<
d
1
TTL
<
0.26
,
wherein d 1 denotes a separated distance between the first lens and the second lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface.
41. The optical imaging system of claim 30, wherein the optical imaging system satisfies the following equation:
0
<
d
3
TTL
<
0.40
,
wherein d 3 denotes a separated distance between the third lens and the fourth lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface.
42. The optical imaging system of claim 30, wherein the fourth lens comprises an aspheric object side surface and an aspheric image side surface.
43. An optical imaging system comprising:
a first lens group comprising a first lens having a positive refractive power; a second lens group comprising a second lens with an object side surface having a positive curvature and with an image side surface having a positive curvature, and having a negative refractive power; a third lens having one of a positive or negative refractive power; and a fourth lens with an object side surface having a positive curvature and with an image side surface having a positive curvature, and having a negative refractive power, wherein each of the first lens group, the second lens group, the third lens, and the fourth lens comprises an aspheric lens having at least one aspheric surface thereof, wherein the optical imaging system satisfies the following equation:
28.2<ν 1 −ν 2 <42.8,
wherein ν 1 and ν 2 denote Abbe's numbers representing dispersion characteristics of the first lens group and the second lens group, respectively.
44. The optical imaging system of claim 43, wherein a sign of a curvature is changed when at least one of the object side surface and the image side surface of the fourth lens is distant from an optical axis.
45. The optical imaging system of claim 44, wherein the first lens comprises an object side surface having a positive curvature, and an image side surface having one of a negative or positive curvature.
46. The optical imaging system of claim 43, wherein the first lens and the second lens contact each other.
47. The optical imaging system of claim 43, wherein each of the first through fourth lenses comprises at least one aspheric surface.
48. The optical imaging system of claim 43, wherein the optical imaging system satisfies the following equation:
0.45
<
f
TTL
<
1.01
,
wherein f denotes a total focal length of the optical imaging system and TTL denotes a distance from an iris surface to an imaging surface.
49. The optical imaging system of claim 43, wherein the optical imaging system satisfies the following equation:
0.3
<
f
1
f
<
3.1
,
0.3
<
f
2
f
<
8.99
,
wherein f denotes a total focal length of the optical imaging system, f 1 denotes a focal length of the first lens, and f 2 denotes a focal length of the second lens.
50. The optical imaging system of claim 43, wherein the optical imaging system satisfies the following equation:
0.19
<
f
3
f
<
∞
,
0.15
<
f
4
f
<
∞
,
wherein f denotes a total focal length of the optical imaging system, f 3 denotes a focal length of the third lens, and f 4 denotes a focal length of the fourth lens.
51. The optical imaging system of claim 43, wherein an iris is disposed at an object side of the first lens.
52. The optical imaging system of claim 43, wherein the optical imaging system satisfies the following equation:
0
<
d
1
TTL
<
0.26
,
wherein d 1 denotes a separated distance between the first lens and the second lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface.
53. The optical imaging system of claim 43, wherein the optical imaging system satisfies the following equation:
0
<
d
3
TTL
<
0.40
,
wherein d 3 denotes a separated distance between the third lens and the fourth lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface.
54. An optical imaging system comprising:
a first lens group comprising a first lens having a positive refractive power; a second lens group comprising a second lens with an object side surface having a positive curvature and with an image side surface having a positive curvature, and having a negative refractive power; a third lens having one of a positive or negative refractive power; and a fourth lens having a negative refractive power, and comprising at least one aspheric surface, wherein each of the first lens group, the second lens group, the third lens, and the fourth lens comprises an aspheric lens having at least one aspheric surface thereof, wherein the optical imaging system satisfies the following equations:
0.3
<
f
1
f
<
3.1
,
0.3
<
f
2
f
<
8.99
,
wherein f denotes a total focal length of the optical imaging system, f 1 denotes a focal length of the first lens, and f 2 denotes a focal length of the second lens;
28.2<ν 1 −ν 2 <42.8,
wherein ν 1 and ν 2 denote Abbe's numbers representing dispersion characteristics of the first lens group and the second lens group, respectively.
55. The optical imaging system of claim 54, wherein the optical imaging system satisfies the following equation:
0.19
<
f
3
f
<
∞
,
0.15
<
f
4
f
<
∞
,
wherein f denotes a total focal length of the optical imaging system, f 3 denotes a focal length of the third lens, and f 4 denotes a focal length of the fourth lens.
56. The optical imaging system of claim 54, wherein the first lens comprises an object side surface having a positive curvature.
57. The optical imaging system of claim 54, wherein the fourth lens comprises an object side surface having a positive curvature, and an image side surface having a positive curvature.
58. The optical imaging system of claim 54, wherein the fourth lens comprises an aspheric object side surface and an aspheric image side surface.
59. An optical imaging system comprising:
a first lens group comprising a first lens having a positive refractive power; a second lens group comprising a second lens with an object side surface having a positive curvature and with an image side surface having a positive curvature, and having a negative refractive power; a third lens having one of a positive or negative refractive power; and a fourth lens having a negative refractive power, and comprising at least one aspheric surface, wherein the optical imaging system satisfies the following equation:
0.45
<
f
TTL
<
1.01
,
wherein f denotes a total focal length of the optical imaging system and TTL denotes a distance from an iris surface to an imaging surface;
0
<
d
1
TTL
<
0.26
,
wherein d 1 denotes a separated distance between the first lens and the second lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface;
0
<
d
3
TTL
<
0.40
,
wherein d 3 denotes a separated distance between the third lens and the fourth lens on the optical axis and TTL denotes a distance from an iris surface to an imaging surface;
0.3
<
f
1
f
<
3.1
,
0.3
<
f
2
f
<
8.99
,
wherein f denotes a total focal length of the optical imaging system, f 1 denotes a focal length of the first lens, and f 2 denotes a focal length of the second lens;
wherein each of the first lens group, the second lens group, the third lens, and the fourth lens comprises an aspheric lens having at least one aspheric surface thereof;
wherein the optical imaging system satisfies the following equation:
28.2<ν 1 −ν 2 <42.8,
wherein ν 1 and ν 2 denote Abbe's numbers representing dispersion characteristics of the first lens group and the second lens group, respectively.
60. The optical imaging system of claim 59, wherein the first lens comprises an object side surface having a positive curvature.
61. The optical imaging system of claim 59, wherein the object side surface of the fourth lens has a positive curvature, and the image side surface of the fourth lens has a positive curvature.
62. The optical imaging system of claim 59, wherein a sign of a curvature is changed when at least one of the object side surface and the image side surface of the fourth lens is distant from an optical axis.
63. The optical imaging system of claim 59, wherein the fourth lens comprises an aspheric object side surface and an aspheric image side surface.Cited by (0)
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