Optical imaging lens

Patent metadata

Field	Value
Publication number	US-10466443-B2
Application number	US-201615144833-A
Country	US
Kind code	B2
Filing date	May 3, 2016
Priority date	Mar 18, 2016
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

An optical imaging lens includes first, second, third, and fourth lens elements arranged in order from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The first lens element has positive refracting power. The object-side surface of the first lens element has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery. The second lens element has negative refracting power. The object-side surface of the third lens element has a concave portion in a vicinity of a periphery. The image-side surface of the fourth lens element has a convex portion in a vicinity of a periphery.

First claim

What is claimed is:

1. An optical imaging lens, comprising a first lens element, a second lens element, a third lens element, and a fourth lens element, wherein each of the first to the fourth lens elements comprises an object-side surface, which faces the object side and allows an imaging ray to pass through, and an image-side surface, which faces an image side and allows the imaging ray to pass through, and wherein the first lens element is arranged to be a lens element having refracting power in a first order from the object side to the image side, the second lens element is arranged to be a lens element having refracting power in a second order from the object side to the image side, the third lens element is arranged to be a lens element having refracting power in a third order from the object side to the image side, and the fourth lens element is arranged to be a lens element having refracting power in a last order from the object side to the image side;
the first lens element has positive refracting power, and the object-side surface of the first lens element has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery;
the second lens element has negative refracting power;
the object-side surface of the third lens element has a concave portion in a vicinity of a periphery;
the fourth lens element has negative refracting power, and the image-side surface of the fourth lens element has a convex portion in a vicinity of a periphery;
wherein the optical imaging lens satisfies:
HFOV≤25°;

TTL≤7.2 mm;

( T 1+ T 2+ T 3)/( G 12+ G 23)≤2.0; and

TTL/( T 1+ G 12+ T 2)≥4.50,

wherein HFOV is a half field of view of the optical imaging lens, TTL is a distance from the object-side surface of the first lens element to an image plane along the optical axis, T1 is a thickness of the first lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis, G12 is a distance from the image-side surface of the first lens element to the object-side surface of the second lens element along the optical axis, and G23 is a distance from the image-side surface of the second lens element-to the object-side surface of the third lens element along the optical axis.

2. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: T2/G34≤6.20, wherein G34 is a distance from the image-side surface of the third lens element to the object-side surface of the fourth lens element along the optical axis.

3. The optical imaging lens according to claim 2 , wherein the optical imaging lens further satisfies: F NO /T1≤3.50/mm, wherein F NO is an f-number of the optical imaging lens.

4. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: EFL/(G12+G23)≤7.20, wherein EFL is an effective focal length of the optical imaging lens.

5. The optical imaging lens according to claim 4 , wherein the optical imaging lens further satisfies: 2.50≤T1/T2.

6. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: (T2+T3)/T1≤1.20.

7. The optical imaging lens according to claim 6 , wherein the optical imaging lens further satisfies: EFL/F NO ≥1.80 mm, wherein EFL is the effective focal length of the optical imaging lens and F NO is the f-number of the optical imaging lens.

8. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: (G12+G23)/(T1+T2)≥0.70.

9. The optical imaging lens according to claim 8 , wherein the optical imaging lens further satisfies: TTL/(T2+T3)≥5.50.

10. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: F NO /(G12+G23)≤2.50/mm, wherein F NO is the f-number of the optical imaging lens.

11. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: G23/(T2+T3)≥1.20.

12. The optical imaging lens according to claim 11 , wherein the optical imaging lens further satisfies: EFL/G23≤3.60, wherein EFL is the effective focal length of the optical imaging lens.

13. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: F NO /G23≤3.00/mm, wherein F NO is the f-number of the optical imaging lens.

14. The optical imaging lens according to claim 13 , wherein the optical imaging lens further satisfies: EFL/(T1+T2)≥4.50, wherein EFL is the effective focal length of the optical imaging lens.

15. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: EFL/(T2+T3)≥5.20, wherein EFL is the effective focal length of the optical imaging lens.

16. The optical imaging lens according to claim 15 , wherein the optical imaging lens further satisfies: (G12+G23)/T2≥3.20.

17. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: EFL/TTL≥1.00, wherein EFL is the effective focal length of the optical imaging lens.

18. The optical imaging lens according to claim 1 , wherein the optical imaging lens further satisfies: TL/G23≤4.50, wherein TL is a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element along the optical axis.

19. The optical imaging lens according to claim 1 , wherein the optical imaging lens further comprises:
an aperture located on the object-side surface of the first lens element or between the first lens element and the second lens element.

Assignees

• Genius Electronic Optical Co Ltd
• Genius Electronic Optical Xiamen Co Ltd

Inventors

• Jhang Jia-Sin
• Yin Yanxuan

Classifications

• G02B9/60

  having five components only · CPC title

• G02B13/004 Primary

  having four lenses · CPC title

• G02B9/56

  all components being simple lenses · CPC title

• G02B9/38

  both - components being meniscus · CPC title

• G02B13/0045

  having five or more lenses · CPC title