Optical image-capturing lens assembly

DC CAFC

US 8,395,691 B2
Filed: 10/26/2010
Issued: 03/12/2013
Est. Priority Date: 08/20/2010
Status: Active Grant

- Alert
- Pin

Associated Cases

Associated Defendants

First Claim

Patent Images

1. An optical image-capturing lens assembly comprising, in order from an object side to an image side:

a first lens element with positive refractive power;

a second lens element with negative refractive power;

a third lens element, the object-side and image-side surfaces thereof being aspheric; and

a fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof,wherein the assembly is further provided with a stop and an electronic sensor for image formation of an object, the stop is disposed between the object and the second lens element, the electronic sensor is disposed at an image plane, a light ray having an incident angle of 36.5 degrees with respect to an optical axis and passing through a center of the stop intersects the image-side surface of the fourth lens element at a point, a perpendicular distance from the point to the optical axis is Yc1, half of a diagonal length of an effective pixel area of the electronic sensor is ImgH, a distance on the optical axis between the stop and the electronic sensor is SL, a distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the following relations;

0.35<

Yc1/ImgH<

0.95;

0.70<

SL/TTL<

1.20.

View all claims

1 Assignment

Timeline View

Assignment View

Litigations

2 Petitions

Accused Products

Abstract

This invention provides an optical image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with negative refractive power; a third lens element, the object-side and image-side surfaces thereof being aspheric; and a fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof. The present lens assembly is further provided with a stop and an electronic sensor for image formation of an object. The stop is disposed between the object and the second lens element, and the electronic sensor is disposed at an image plane.

34 Citations

View as Search Results

29 Claims

1. An optical image-capturing lens assembly comprising, in order from an object side to an image side:
- a first lens element with positive refractive power;
  
  a second lens element with negative refractive power;
  
  a third lens element, the object-side and image-side surfaces thereof being aspheric; and
  
  a fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof,wherein the assembly is further provided with a stop and an electronic sensor for image formation of an object, the stop is disposed between the object and the second lens element, the electronic sensor is disposed at an image plane, a light ray having an incident angle of 36.5 degrees with respect to an optical axis and passing through a center of the stop intersects the image-side surface of the fourth lens element at a point, a perpendicular distance from the point to the optical axis is Yc1, half of a diagonal length of an effective pixel area of the electronic sensor is ImgH, a distance on the optical axis between the stop and the electronic sensor is SL, a distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the following relations;
  
  0.35<
  
  Yc1/ImgH<
  
  0.95;
  
  0.70<
  
  SL/TTL<
  
  1.20.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- - 2. The optical image-capturing lens assembly according to claim 1, wherein the second lens element has a concave image-side surface, and the third lens element has a concave object-side surface and a convex image-side surface.
  - 3. The optical image-capturing lens assembly according to claim 2, wherein the third lens element has positive refractive power and the fourth lens element has negative refractive power.
  - 4. The optical image-capturing lens assembly according to claim 3, wherein the second lens element has a concave object-side surface.
  - 5. The optical image-capturing lens assembly according to claim 3, wherein the radius of curvature of the image-side surface of the fourth lens element is R8, the focal length of the optical image-capturing lens assembly is f, and they satisfy the following relation:
    - 0.10<
      
      R8/f<
      
      0.45.
  - 6. The optical image-capturing lens assembly according to claim 1, wherein the focal length of the optical image-capturing lens assembly is f, the focal length of the third lens element is f3, the focal length of the first lens element is f1, and they satisfy the following relation:
    - 0.70<
      
      (f/f3)−
      
      (f/f1)<
      
      2.00.
  - 7. The optical image-capturing lens assembly according to claim 6, wherein the thickness of the second lens element on the optical axis is CT2, and it satisfies the following relation:
    - 0.15 mm<
      
      CT2<
      
      0.32 mm.
  - 8. The optical image-capturing lens assembly according to claim 1, wherein the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, and they satisfy the following relation:
    - 28.5<
      
      V1−
      
      V2<
      
      42.0.
  - 9. The optical image-capturing lens assembly according to claim 1, wherein a light ray having an incident angle of 37.2 degrees with respect to the optical axis and passing through the center of the stop intersects the image-side surface of the fourth lens element at a point, the perpendicular distance from the point to the optical axis is Yc2, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the following relation:
    - 0.50<
      
      Yc2/ImgH<
      
      0.95.
  - 10. The optical image-capturing lens assembly according to claim 1, wherein the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and it satisfies the following relation:
    - 1.80 mm<
      
      TTL<
      
      3.20 mm.
  - 11. The optical image-capturing lens assembly according to claim 10, wherein the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and it satisfies the following relation:
    - 2.20 mm<
      
      TTL<
      
      2.70 mm.

12. An optical image-capturing lens assembly comprising, in order from an object side to an image side:
- a first lens element with positive refractive power;
  
  a second lens element with negative refractive power;
  
  a plastic third lens element, the object-side and image-side surfaces thereof being aspheric; and
  
  a plastic fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof,wherein the assembly is further provided with a stop and an electronic sensor for image formation of an object, the stop is disposed between the object and the second lens element, the electronic sensor is disposed at an image plane, a light ray having an incident angle of 36.5 degrees with respect to an optical axis and passing through a center of the stop intersects the image-side surface of the fourth lens element at a point, a perpendicular distance from the point to the optical axis is Yc1, half of a diagonal length of an effective pixel area of the electronic sensor is ImgH, a distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the following relations;
  
  0.35<
  
  Yc1/ImgH<
  
  0.95; and
  
  1.80 mm<
  
  TTL<
  
  3.20 mm.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
- - 13. The optical image-capturing lens assembly according to claim 12, wherein the first lens element has a convex object-side surface and the second lens element has a concave image-side surface.
  - 14. The optical image-capturing lens assembly according to claim 13, wherein the third lens element has positive refractive power with a concave object-side surface and a convex image-side surface, and the fourth lens element has negative refractive power.
  - 15. The optical image-capturing lens assembly according to claim 14, wherein the focal length of the optical image-capturing lens assembly is f, the focal length of the third lens element is f3, the focal length of the first lens element is f1, and they satisfy the following relation:
    - 0.70<
      
      (f/f3)−
      
      (f/f1)<
      
      2.00.
  - 16. The optical image-capturing lens assembly according to claim 15, wherein the fourth lens element has a concave object-side surface.
  - 17. The optical image-capturing lens assembly according to claim 15, wherein the second lens element has a concave object-side surface.
  - 18. The optical image-capturing lens assembly according to claim 14, wherein the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, and they satisfy the following relation:
    - 28.5<
      
      V1−
      
      V2<
      
      42.0.
  - 19. The optical image-capturing lens assembly according to claim 14, wherein half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, the thickness of the second lens element on the optical axis is CT2, and they satisfy the following relation:
    - 2.50<
      
      TTL/(ImgH×
      
      CT2)^1/2<
      
      4.35.
  - 20. The optical image-capturing lens assembly according to claim 12, wherein the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and it satisfies the following relation:
    - 2.20 mm<
      
      TTL<
      
      2.70 mm.

21. An optical image-capturing lens assembly comprising, in order from an object side to an image side:
- a first lens element with positive refractive power having a convex object-side surface;
  
  a second lens element with negative refractive power;
  
  a plastic third lens element, the object-side and image-side surfaces thereof being aspheric; and
  
  a plastic fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof,wherein the assembly is further provided with an electronic sensor for image formation of an object, the electronic sensor is disposed at an image plane, a distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the following relation;
  
  1.80 mm<
  
  TTL<
  
  3.20 mm.
- View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
- - 22. The optical image-capturing lens assembly according to claim 21, wherein the second lens element has a concave image-side surface, and the third lens element has a concave object-side surface and a convex image-side surface.
  - 23. The optical image-capturing lens assembly according to claim 22, wherein the third lens element has positive refractive power and the fourth element has negative refractive power.
  - 24. The optical image-capturing lens assembly according to claim 23, wherein the focal length of the optical image-capturing lens assembly is f, the focal length of the third lens element is f3, the focal length of the first lens element is f1, and they satisfy the following relation:
    - 0.70<
      
      (f/f3)−
      
      (f/f1)<
      
      2.00.
  - 25. The optical image-capturing lens assembly according to claim 23, wherein the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, and they satisfy the following relation:
    - 28.5<
      
      V1−
      
      V2<
      
      42.0.
  - 26. The optical image-capturing lens assembly according to claim 23, wherein a light ray having an incident angle of 36.5 degrees with respect to the optical axis and passing through the center of the stop intersects the image-side surface of the fourth lens element at a point, the perpendicular distance from the point to the optical axis is Yc1, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the following relation:
    - 0.35<
      
      Yc1/ImgH<
      
      0.95.
  - 27. The optical image-capturing lens assembly according to claim 23, wherein half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, the thickness of the second lens element on the optical axis is CT2, and they satisfy the following relation:
    - 2.50<
      
      TTL/(ImgH×
      
      CT2)^1/2<
      
      4.35.
  - 28. The optical image-capturing lens assembly according to claim 23, wherein the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and it satisfies the following relation:
    - 2.20 mm<
      
      TTL<
      
      2.70 mm.
  - 29. The optical image-capturing lens assembly according to claim 23, wherein the second lens element has a concave object-side surface.

Specification

Resources

Litigation Campaign Assessment

Litigation Data

Current Assignee
Largan Precision Co Limited (Largan Precision)
Original Assignee
Largan Precision Co Limited (Largan Precision)
Inventors
Tang, Hsiang Chi, Hsieh, Dung Yi, Chen, Chun Shan, Tsai, Tsung Han
Primary Examiner(s)
Jerabek, Kelly L

Application Number

US12/912,401
Publication Number

US 20120044403A1
Time in Patent Office

868 Days
Field of Search

348/335, 348/340, 348360-362, 359/715, 359/716, 359/771, 359/772, 359/784
US Class Current

348/335
CPC Class Codes

G02B 13/004   having four lenses

G02B 13/18   with lenses having one or m...

G02B 15/142   having two groups only

Optical image-capturing lens assembly

First Claim

1 Assignment

Litigations

2 Petitions

Accused Products

Abstract

34 Citations

29 Claims

Specification

Solutions

Use Cases

Quick Links

Optical image-capturing lens assembly

First Claim

1 Assignment

Subscription Required

Subscription Required

Litigations

2 Petitions

Subscription Required

Accused Products

Subscription Required

Abstract

34 Citations

29 Claims

Specification

Subscription Required

Solutions

Use Cases

Quick Links