Optical imaging lens

Patent metadata

Field	Value
Publication number	US-11927725-B2
Application number	US-202217882638-A
Country	US
Kind code	B2
Filing date	Aug 8, 2022
Priority date	Jun 25, 2019
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

An optical imaging lens includes a first lens element, a second lens, an aperture stop, a third lens element and a fourth lens element from an object side to an image side in order along an optical axis, and each lens element has an object-side surface and an image-side surface. An optical axis region of the object-side surface of the second lens element is convex. Only the above-mentioned four lens elements of the optical imaging lens have refracting power to satisfies the relationship: HFOV≤15.000°, 3.000≤TL/(G 12 +T 2 +G 23 ) and TTL/BFL≤3.500.

First claim

What is claimed is:

1. An optical imaging lens, from an object side to an image side in order along an optical axis comprising: a first lens element, a second lens element, a third lens element, and a fourth lens element, each of the first lens element to the fourth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the object-side surface of the first lens element is convex; and
an optical axis region of the object-side surface of the second lens element is convex;
wherein lens elements included by the optical imaging lens are only the four lens elements described above;

wherein HFOV stands for 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, 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, T 2 is a thickness of the second lens element along the optical axis, G 12 is an air gap between the first lens element and the second lens element along the optical axis, G 23 is an air gap between the second lens element and the third lens element along the optical axis, and BFL is a distance from the image-side surface of the fourth lens element to the image plane along the optical axis, and the optical imaging lens satisfies the relationship: HFOV≤15.000°, 3.000≤TL/(G 12 +T 2 +G 23 ) and TTL/BFL≤3.500.

2. The optical imaging lens of claim 1 , satisfying a periphery region of the image-side surface of the third lens element is concave.

3. The optical imaging lens of claim 1 , satisfying the relationship: HFOV/TTL≤1.500°/mm.

4. The optical imaging lens of claim 1 , wherein T 1 is a thickness of the first lens element along the optical axis and T 4 is a thickness of the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: 3.000≤(T 4 +BFL)/T 1 .

5. The optical imaging lens of claim 1 , wherein EFL is an effective focal length of the optical imaging lens, AAG is a sum of three air gaps from the first lens element to the fourth lens element along the optical axis, T 1 is a thickness of the first lens element along the optical axis and T 4 is a thickness of the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: 3.000≤(EFL+T 4 )/(AAG+T 1 ).

6. The optical imaging lens of claim 1 , wherein an effective radius of the object-side surface of the first lens element is r 1 , an effective radius of the object-side surface of the second lens element is r 3 , an effective radius of the image-side surface of the third lens element is r 6 , and the optical imaging lens satisfies the relationship: (r 1 +r 3 )/r 6 ≥2.200.

7. The optical imaging lens of claim 1 , wherein, an Abbe number of the first lens element is u 1 , an Abbe number of the second lens element is u 2 , an Abbe number of the third lens element is u 3 , and the optical imaging lens satisfies the relationship: u 1 +u 2 ≥2*u 3 .

8. An optical imaging lens, from an object side to an image side in order along an optical axis comprising: a first lens element, a second lens element, a third lens element, and a fourth lens element, each of the first lens element to the fourth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the object-side surface of the first lens element is convex; and
an optical axis region of the object-side surface of the second lens element is convex;
wherein lens elements included by the optical imaging lens are only the four lens elements described above;

wherein HFOV stands for a half field of view of the optical imaging lens, 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, T 1 is a thickness of the first lens element along the optical axis, T 2 is a thickness of the second lens element along the optical axis, T 3 is a thickness of the third lens element along the optical axis, G 12 is an air gap between the first lens element and the second lens element along the optical axis, G 23 is an air gap between the second lens element and the third lens element along the optical axis and G 34 is an air gap between the third lens element and the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: HFOV≤15.000°, 3.000≤TL/(G 12 +T 2 +G 23 ) and (G 34 +TL)/(T 1 +T 3 )≤3.500.

9. The optical imaging lens of claim 8 , wherein TTL is a distance from the object-side surface of the first lens element to an image plane along the optical axis, AAG is a sum of three air gaps from the first lens element to the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: TTL/AAG≥10.000.

10. The optical imaging lens of claim 8 , wherein TTL is a distance from the object-side surface of the first lens element to an image plane along the optical axis, and the optical imaging lens satisfies the relationship: 3.000≤TTL/(T 1 +G 12 +T 3 ).

11. The optical imaging lens of claim 8 , wherein EFL is an effective focal length 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, and the optical imaging lens satisfies the relationship: EFL/TTL≤1.000.

12. The optical imaging lens of claim 8 , wherein BFL is a distance from the image-side surface of the fourth lens element to an image plane along the optical axis, and the optical imaging lens satisfies the relationship: 3.000≤BFL/(T 3 +G 34 ).

13. The optical imaging lens of claim 8 , wherein T 4 is a thickness of the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: T 4 /(G 12 +G 23 )≥1.500.

14. The optical imaging lens of claim 8 , wherein T 4 is a thickness of the fourth lens element along the optical axis, and the optical imaging lens satisfies the relationship: 4.500≤(T 2 +T 4 )/(G 12 +G 23 ).

15. An optical imaging lens, from an object side to an image side in order along an optical axis comprising: a first lens element, a second lens element, a third lens element, and a fourth lens element, each of the first lens element to the fourth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the object-side surface of the first lens element is convex; and
an optical axis region of the image-side surface of the second lens element is concave; and
the third lens element has negative refracting power;
wherein lens elements included by the optical imaging lens are only the four lens elements described above;

wherein HFOV stands for a half field of view of the optical imaging lens, 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, T 1 is a thickness of the first lens element along the optical axis, T 2 is a thickness of the second lens element along the optical axis, T 3 is a th

Assignees

• Genius Electronic Optical Xiamen Co Ltd

Inventors

• Hsieh Hung-Chien
• Zhou Ou
• Zhang Lanlan

Classifications

• G02B13/004 Primary

  having four lenses · CPC title

• G02B9/56

  all components being simple lenses · CPC title

• G02B15/1441

  the first group being positive · CPC title

• G02B9/34

  having four components only · CPC title

• G02B3/04

  with continuous faces that are rotationally symmetrical but deviate from a true sphere {, e.g. so called "aspheric" lenses} · CPC title