Optical imaging lens

Patent metadata

Field	Value
Publication number	US-2021199924-A1
Application number	US-202016849762-A
Country	US
Kind code	A1
Filing date	Apr 15, 2020
Priority date	Dec 31, 2019
Publication date	Jul 1, 2021
Grant date	—

Abstract

The present invention provides an optical imaging lens. The optical imaging lens comprises six lens elements positioned in an order from an object side to an image side. Through controlling convex or concave shape of surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may present a great angle of view with smaller surface area of the front side of the optical imaging lens.

First claim

What is claimed is:

1 . An optical imaging lens, comprising a first element, a second element, a third element, a fourth element, a fifth lens element and a sixth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth and sixth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the image-side surface of the first lens element is convex; a periphery region of the object-side surface of the second lens element is convex; a periphery region of the image-side surface of the fourth lens element is convex; an optical axis region of the object-side surface of the sixth lens element is concave; a periphery region of the image-side surface of the sixth lens element is convex; lens elements having refracting power of the optical imaging lens consist of the six lens elements described above; and a thickness of the first lens element along the optical axis is represented by T1, a sum of five air gaps from the first lens element to the sixth lens element along the optical axis is represented by AAG, and the optical imaging lens satisfies the inequality:
T 1/ AAG≥ 1.000.

2 . The optical imaging lens according to claim 1 , wherein a sum of the thicknesses of all six lens elements along the optical axis is represented by ALT, a distance from the image-side surface of the sixth lens element to an image plane along the optical axis is represented by BFL, and ALT and BFL satisfy the inequality:
ALT/BFL≥ 2.100.

3 . The optical imaging lens according to claim 1 , wherein an effective focal length of the optical imaging lens is represented by EFL, a thickness of the fourth lens element along the optical axis is represented by T4, a thickness of the sixth lens element along the optical axis is represented by T6, and EFL, T4 and T6 satisfy the inequality:
EFL /( T 4+ T 6)≥4.500.

4 . The optical imaging lens according to claim 1 , wherein a distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element along the optical axis is represented by TL, a thickness of the third lens element along the optical axis is represented by T3, a thickness of the sixth lens element along the optical axis is represented by T6, and TL, T3 and T6 satisfy the inequality:
TL /( T 3+ T 6)≥4.300.

5 . The optical imaging lens according to claim 1 , wherein a distance from the image-side surface of the sixth lens element to an image plane along the optical axis is represented by BFL, and BFL and AAG satisfy the inequality:
BFL/AAG≤ 1.700.

6 . The optical imaging lens according to claim 1 , wherein a thickness of the third lens element along the optical axis is represented by T3, a thickness of the fourth lens element along the optical axis is represented by T4, a thickness of the second lens element along the optical axis is represented by T2, and T3, T4 and T2 satisfy the inequality:
( T 3+ T 4)/ T 2≤3.600.

7 . The optical imaging lens according to claim 1 , wherein 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 is represented by G12, a thickness of the second lens element along the optical axis is represented by T2, a thickness of the third lens element along the optical axis is represented by T3, 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 is represented by G34, a thickness of the fourth lens element along the optical axis is represented by T4, and T1, G12, T2, T3, G34 and T4 satisfy the inequality:
( T 1+ G 12+ T 2)/( T 3+ G 34+ T 4)≥1.700.

8 . An optical imaging lens, comprising a first element, a second element, a third element, a fourth element, a fifth lens element and a sixth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth and sixth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the image-side surface of the first lens element is convex; a periphery region of the image-side surface of the fourth lens element is convex; an optical axis region of the object-side surface of the sixth lens element is concave; a periphery region of the image-side surface of the sixth lens element is convex; lens elements having refracting power of the optical imaging lens consist of the six lens elements described above; and a thickness of the first lens element along the optical axis is represented by T1, a sum of five air gaps from the first lens element to the sixth lens element along the optical axis is represented by AAG, a distance from the object-side surface of the first lens element to an image plane along the optical axis is represented by TTL, and the optical imaging lens satisfies the inequality:
T 1/ AAG≥ 1.000; and
TTL/T 1≤5.100.

9 . The optical imaging lens according to claim 8 , wherein a sum of the thicknesses of all six lens elements along the optical axis is represented by ALT, a thickness of the second lens element along the optical axis is represented by T2, a thickness of the third lens element along the optical axis is represented by T3, and ALT, T2 and T3 satisfy the inequality:
ALT /( T 2+ T 3)≥4.700.

10 . The optical imaging lens according to claim 8 , wherein an effective focal length of the optical imaging lens is represented by EFL, a distance from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis is represented by G45, a thickness of the fifth lens element along the optical axis is represented by T5, and EFL, G45 and T5 satisfy the inequality:
EFL /( G 45+ T 5)≤5.700.

11 . The optical imaging lens according to claim 8 , wherein a distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element along the optical axis is represented by TL, a distance from the image-side surface of the sixth lens element to the image plane along the optical axis is represented by BFL, 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 is represented by G23, a distance from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element along the optical axis is represented by G56, and TL, BFL, G23 and G56 satisfy the inequality:
( TL+BFL )/( G 23+ G 56)≤11.500.

12 . The optical imaging lens according to claim 8 , wherein a distance from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis is represented by G45, a distance from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element along the optical axis is represented by G56, and AAG, G45 and G56 satisfy the inequality:
AAG /( G 45+ G 56)≤2.500.

13 . The optical imaging lens according to claim 8 , wherein a distance from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis is represented by G45, a distance

Assignees

• Genius Electronic Optical Xiamen Co Ltd

Inventors

• Jhang Jia-Sin
• Lai Yongfeng
• Chen Baina

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/62 Primary

  having six components only · CPC title

• G02B13/18

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• G02B13/04

  Reversed telephoto objectives · CPC title

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title