Granted Patent B2

US 11,789,242 · App. 17/742,462 · Granted Oct 17, 2023

Inventors: Tsung-Han Tsai (Taichung, TW); Hsin-Hsuan Huang (Taichung, TW)

Assignee: LARGAN PRECISION CO., LTD.

G02B13/0045G02B3/04G02B9/64G02B13/18G02B27/0025H04N23/55

Abstract

Claims (188)

1. An optical image capturing system comprising seven lens elements, the seven lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element;

wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element has an object-side surface facing towards the object side, and an image-side surface facing towards the image side;

wherein at least one of the object-side surface and the image-side surface of the seventh lens element is aspheric; at least one of the object-side surface and the image-side surface of the seventh lens element comprises at least one inflection point;

wherein a total number of the lens elements in the optical image capturing system is seven; a minimum central thickness of a lens element among all lens elements of the optical image capturing system is CTmin, and the following relationship is satisfied:

0.1

mm

<

CT

⁢

min

<

0.3

mm

.

2. The optical image capturing system of claim 1 , wherein the first lens element has positive refractive power; the image-side surface of the seventh lens element is concave in a paraxial region thereof, and has a concave-to-convex shape change from the paraxial region thereof to an off-axis region thereof.

3. The optical image capturing system of claim 1 , wherein the second lens element has negative refractive power; an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and the following relationship is satisfied:

28

<

V

⁢

1

-

V

⁢

2

<

42.

4. The optical image capturing system of claim 1 , wherein the third lens element has positive refractive power; the image-side surface of the third lens element is convex in a paraxial region thereof.

5. The optical image capturing system of claim 1 , wherein the sixth lens element has positive refractive power; there is an air gap between each of adjacent lens elements of the seven lens elements.

6. The optical image capturing system of claim 1 , wherein the seventh lens element has negative refractive power; each of the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element is made of plastic material.

7. The optical image capturing system of claim 1 , wherein the object-side surface of the second lens element is convex in a paraxial region thereof, and the image-side surface of the second lens element is concave in a paraxial region thereof.

8. The optical image capturing system of claim 1 , wherein the object-side surface of the seventh lens element is convex in a paraxial region thereof.

9. The optical image capturing system of claim 1 , wherein the object-side surface of the seventh lens element is concave in a paraxial region thereof.

10. The optical image capturing system of claim 1 , wherein the object-side surface of the sixth lens element is convex in a paraxial region thereof and has a convex-to-concave shape change from the paraxial region thereof to an off-axis region thereof.

11. The optical image capturing system of claim 1 , wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and the following relationship is satisfied:

34.4

≤

V

⁢

1

-

V

⁢

2

<

42.

12. The optical image capturing system of claim 1 , wherein a focal length of the optical image capturing system is f, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, and the following relationship is satisfied:

❘

"\[LeftBracketingBar]"

f

/

f

⁢

3

❘

"\[RightBracketingBar]"

+

❘

"\[LeftBracketingBar]"

f

/

f

⁢

4

❘

"\[RightBracketingBar]"

<

1.

.

13. The optical image capturing system of claim 1 , wherein a focal length of the optical image capturing system is f, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, and the following relationship is satisfied:

2.3

<

❘

"\[LeftBracketingBar]"

f

/

f

⁢

6

❘

"\[RightBracketingBar]"

+

❘

"\[LeftBracketingBar]"

f

/

f

⁢

7

❘

"\[RightBracketingBar]"

<

5.

.

14. The optical image capturing system of claim 1 , wherein a curvature radius of the image-side surface of the seventh lens element is R14, a focal length of the optical image capturing system is f, and the following relationship is satisfied:

0.1

<

R

⁢

14

/

f

<

1.

.

15. The optical image capturing system of claim 1 , wherein a focal length of the optical image capturing system is f, an axial distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element is Td, and the following relationship is satisfied:

0.85

<

Td

/

f

<

1.35

.

16. The optical image capturing system of claim 1 , wherein a focal length of the optical image capturing system is f, a vertical distance from a critical point on the image-side surface of the seventh lens element to an axial vertex on the image-side surface of the seventh lens element is Yc72, and the following relationship is satisfied:

0

.

1

<

Yc

⁢

⁢

72

⁢

/

⁢

f

<

0

.

9

.

17. The optical image capturing system of claim 1 , wherein a maximal field of view of the optical image capturing system is FOV, and the following relationship is satisfied:

72

⁢

degrees

<

FOV

<

95

⁢

degrees

.

18. The optical image capturing system of claim 1 , wherein an axial distance between the object-side surface of the first lens element and an image plane is TTL, a maximum image height of the optical image capturing system is ImgH, a curvature radius of the object-side surface of the seventh lens element is R13, a curvature radius of the image-side surface of the seventh lens element is R14, and the following relationships are satisfied:

1.

<

TTL

/

lmgH

<

1.7

;

and

⁢

-

5.

<

R

⁢

14

/

R

⁢

13

<

1.

.

19. The optical image capturing system of claim 1 , wherein an axial distance between the object-side surface of the first lens element and an image plane is TTL, a maximum image height of the optical image capturing system is ImgH, and the following relationship is satisfied:

1.

<

TTL

/

lmgH

≤

1.58

.

20. The optical image capturing system of claim 1 , wherein an axial distance between the object-side surface of the first lens element and an image plane is TTL, a maximum image height of the optical image capturing system is ImgH, and the following relationship is satisfied:

1.

<

TTL

/

lmgH

≤

1.43

.

21. The optical image capturing system of claim 1 , further comprising:

an aperture stop located on an object side of the third lens element.

22. The optical image capturing system of claim 1 , wherein a central thickness of the sixth lens element is a maximum among central thicknesses of the seven lens elements.

Assignments (1)

Priority Claims (1)

Continuity (11)