Granted Patent B2

US 12,724,235 · App. 18/207,014 · Granted Sep 1, 2026

Inventors: Yu Jui Lin (Taichung City, TW); Tzu-Chieh Kuo (Taichung City, TW)

Assignee: LARGAN PRECISION CO., LTD.

G02B13/0045G02B1/041G02B13/02G02B9/64G02B13/06

Abstract

Claims (391)

1 . An optical photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side along an optical path, 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, and each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the second lens element has negative refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof, the sixth lens element has positive refractive power, the object-side surface of the seventh lens element is convex in a paraxial region thereof, the image-side surface of the seventh lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof;

wherein a central thickness of the fifth lens element is CT5, an axial distance between the fifth lens element and the sixth lens element is T56, a minimum value among an Abbe number of the third lens element, an Abbe number of the fourth lens element and an Abbe number of the fifth lens element is minV345, and the following conditions are satisfied:

5.5

<

CT

⁢

5

/

T

⁢

56

;

and

42.

<

min

⁢

V

⁢

345

<

7

⁢

0

.

0

.

2 . The optical photographing lens assembly of claim 1 , wherein at least one of the object-side surface and the image-side surface of each of at least two of the seven lens elements has at least one inflection point in an off-axis region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one critical point in an off-axis region thereof.

3 . The optical photographing lens assembly of claim 1 , wherein a central thickness of the third lens element is CT3, an axial distance between the third lens element and the fourth lens element is T34, and the following condition is satisfied:

1.1

<

CT

⁢

3

/

T

⁢

34

<

10.

4 . The optical photographing lens assembly of claim 1 , wherein the axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the sixth lens element and the seventh lens element is T67, and the following condition is satisfied:

5.5

<

T

⁢

67

/

T

⁢

56

<

80.

5 . The optical photographing lens assembly of claim 1 , wherein a focal length of the first lens element is f1, a curvature radius of the image-side surface of the first lens element is R2, and the following condition is satisfied:

❘

"\[LeftBracketingBar]"

f

⁢

1

/

R

⁢

2

❘

"\[RightBracketingBar]"

<

0.95

.

6 . The optical photographing lens assembly of claim 1 , wherein a focal length of the optical photographing lens assembly is f, a curvature radius of the image-side surface of the seventh lens element is R14, and the following condition is satisfied:

3.5

<

f

/

R

⁢

14

<

6.5

.

7 . The optical photographing lens assembly of claim 1 , wherein a maximum effective radius of the object-side surface of the first lens element is Y11, a distance in parallel with an optical axis between a maximum effective radius position on the object-side surface of the first lens element and a maximum effective radius position on the image-side surface of the first lens element is ET1, and the following condition is satisfied:

2.

<

Y

⁢

11

/

ET

⁢

1

<

3.8

.

8 . The optical photographing lens assembly of claim 1 , wherein the seventh lens element has negative refractive power, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, and the following condition is satisfied:

-

1.3

<

f

⁢

6

/

f

⁢

7

<

-

0.3

.

9 . The optical photographing lens assembly of claim 1 , wherein a vertical distance between a critical point on the image-side surface of the seventh lens element and an optical axis is Yc72, a maximum effective radius of the image-side surface of the seventh lens element is Y72, and at least one critical point on the image-side surface of the seventh lens element in an off-axis region thereof satisfies the following condition:

0.2

<

Yc

⁢

72

/

Y

⁢

72

<

0.65

.

10 . An image capturing unit, comprising:

the optical photographing lens assembly of claim 1 ; and

an image sensor disposed on an image surface of the optical photographing lens assembly.

11 . An electronic device, comprising:

the image capturing unit of claim 10 .

12 . An optical photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side along an optical path, 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, and each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof, the sixth lens element has positive refractive power, the object-side surface of the seventh lens element is convex in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof;

wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the seventh lens element is R14, a central thickness of the fifth lens element is CT5, an axial distance between the fifth lens element and the sixth lens element is T56, a minimum value among an Abbe number of the third lens element, an Abbe number of the fourth lens element and an Abbe number of the fifth lens element is minV345, and the following conditions are satisfied:

1.6

<

R

⁢

1

/

R

⁢

14

<

4.5

;

5.5

<

CT

⁢

5

/

T

⁢

56

;

and

46.

<

min

⁢

V

⁢

345

<

65.

.

13 . The optical photographing lens assembly of claim 12 , wherein the minimum value among the Abbe number of the third lens element, the Abbe number of the fourth lens element and the Abbe number of the fifth lens element is minV345, and the following condition is satisfied:

50.

<

min

⁢

V

⁢

345

<

60.

.

14 . The optical photographing lens assembly of claim 12 , wherein a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a central thickness of the fourth lens element is CT4, the central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, a central thickness of the seventh lens element is CT7, and the following condition is satisfied:

5.5

<

(

CT

⁢

1

+

CT

⁢

2

+

CT

⁢

3

+

CT

⁢

4

+

CT

⁢

5

+

CT

⁢

6

)

/

CT

⁢

7

<

9.

.

15 . The optical photographing lens assembly of claim 12 , wherein an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, and the following condition is satisfied:

0.7

<

T

⁢

23

/

T

⁢

34

<

8.5

.

16 . The optical photographing lens assembly of claim 12 , wherein an f-number of the optical photographing lens assembly is Fno, half of a maximum field of view of the optical photographing lens assembly is HFOV, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the optical photographing lens assembly is ImgH, and the following conditions are satisfied:

1.3

<

Fno

<

2.2

;

35.

degrees

<

HFOV

<

50.

degrees

;

and

1.

<

TL

/

ImgH

<

1.6

.

17 . The optical photographing lens assembly of claim 12 , wherein the second lens element has negative refractive power, a focal length of the second lens element is f2, a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, and the following condition is satisfied:

-

6.

<

f

⁢

2

/

R

⁢

3

+

f

⁢

2

/

R

⁢

4

<

-

2.5

.

18 . The optical photographing lens assembly of claim 12 , wherein a vertical distance between a critical point on the object-side surface of the seventh lens element and an optical axis is Yc71, a maximum effective radius of the object-side surface of the seventh lens element is Y71, and at least one critical point on the object-side surface of the seventh lens element in an off-axis region thereof satisfies the following condition:

0.1

<

Yc

⁢

71

/

Y

⁢

71

<

0.4

.

19 . An optical photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side along an optical path, 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, and each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the sixth lens element has positive refractive power, the object-side surface of the sixth lens element is convex in a paraxial region thereof, the object-side surface of the seventh lens element is convex in a paraxial region thereof, the image-side surface of the seventh lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof;

wherein a central thickness of the fifth lens element is CT5, an axial distance between the fifth lens element and the sixth lens element is T56, a minimum value among an Abbe number of the third lens element, an Abbe number of the fourth lens element and an Abbe number of the fifth lens element is minV345, and the following conditions are satisfied:

5.5

<

CT

⁢

5

/

T

⁢

56

;

and

42.

<

min

⁢

V

⁢

345

<

70.

.

20 . The optical photographing lens assembly of claim 19 , wherein the central thickness of the fifth lens element is CT5, the axial distance between the fifth lens element and the sixth lens element is T56, and the following condition is satisfied:

6.5

<

CT

⁢

5

/

T

⁢

56

<

60.

21 . The optical photographing lens assembly of claim 19 , wherein an axial distance between the first lens element and the second lens element is T12, an axial distance between the sixth lens element and the seventh lens element is T67, a maximum effective radius of the object-side surface of the first lens element is Y11, a maximum effective radius of the image-side surface of the seventh lens element is Y72, and the following conditions are satisfied:

1.2

<

T

⁢

67

/

T

⁢

12

<

12

;

and

2.

<

Y

⁢

72

/

Y

⁢

11

<

4.

.

22 . The optical photographing lens assembly of claim 19 , wherein a focal length of the optical photographing lens assembly is f, a composite focal length of the third lens element, the fourth lens element and the fifth lens element is f345, and the following condition is satisfied:

-

0.75

<

f

/

f

⁢

345

<

0.35

.

23 . The optical photographing lens assembly of claim 19 , wherein a focal length of the optical photographing lens assembly is f, a curvature radius of the object-side surface of the seventh lens element is R13, and the following condition is satisfied:

2.2

<

f

/

R

⁢

13

<

4.

.

24 . The optical photographing lens assembly of claim 19 , wherein the object-side surface of the first lens element is convex in a paraxial region thereof, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the seventh lens element is R14, and the following condition is satisfied:

1.6

<

R

⁢

1

/

R

⁢

14

<

4.5

.

25 . The optical photographing lens assembly of claim 19 , wherein a vertical distance between a critical point on the object-side surface of the sixth lens element and an optical axis is Yc61, a maximum effective radius of the object-side surface of the sixth lens element is Y61, and at least one critical point on the object-side surface of the sixth lens element in an off-axis region thereof satisfies the following condition:

0.35

<

Yc

⁢

61

/

Y

⁢

61

<

0.8

.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (12)