Optical imaging lens

Patent metadata

Field	Value
Publication number	US-2020018927-A1
Application number	US-201816199239-A
Country	US
Kind code	A1
Filing date	Nov 26, 2018
Priority date	Jul 13, 2018
Publication date	Jan 16, 2020
Grant date	—

Abstract

An optical imaging lens includes a first lens element to a sixth lens element. An optical axis region of the object-side surface of the first lens element is convex, an optical axis region of the image-side surface of the second lens element is convex, an optical axis region of the object-side surface of the third lens element is convex, the fourth lens element has negative refracting power, an optical axis region of the object-side surface of the fourth lens element is concave, a periphery region of the object-side surface of the fifth lens element is concave, an optical axis region of the object-side surface of the sixth lens element is convex and an optical axis region of the image-side surface of the sixth lens element is concave to satisfy (G12+T3+G34+T4+G45+T5)/EFL≥1.200.

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, a fourth lens element, a fifth lens element, and a sixth lens element, the first lens element to the sixth lens element each 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; an optical axis region of the image-side surface of the second lens element is convex; an optical axis region of the object-side surface of the third lens element is convex; the fourth lens element has negative refracting power and an optical axis region of the object-side surface of the fourth lens element is concave; a periphery region of the object-side surface of the fifth lens element is concave; and an optical axis region of the object-side surface of the sixth lens element is convex and an optical axis region of the image-side surface of the sixth lens element is concave; wherein only the above-mentioned six lens elements of the optical imaging lens have refracting power; wherein, EFL is an effective focal length of the optical imaging lens, T3 is a thickness of the third lens element along the optical axis, T4 is a thickness of the fourth lens element along the optical axis, T5 is a thickness of the fifth lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G34 is an air gap between the third lens element and the fourth lens element along the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element along the optical axis, and the optical imaging lens satisfies the relationship: (G12+T3+G34+T4+G45+T5)/EFL≥1.200.

2 . The optical imaging lens of claim 1 , wherein BFL is a distance from the image-side surface of the sixth lens element to an image plane along the optical axis, T2 is a thickness of the second lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: BFL/(T2+G56)≥1.000.

3 . The optical imaging lens of claim 1 , wherein ALT is a sum of thicknesses of all the six lens elements along the optical axis, G23 is an air gap between the second lens element and the third lens element along the optical axis, and the optical imaging lens satisfies the relationship: ALT/(G23+T3+G34)≤3.100.

4 . The optical imaging lens of claim 1 , wherein ALT is a sum of thicknesses of all the six lens elements along the optical axis, and the optical imaging lens satisfies the relationship: ALT/EFL≤2.300.

5 . The optical imaging lens of claim 1 , wherein AAG is a sum of five air gaps from the first lens element to the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: AAG/(T4+G45)≥3.900.

6 . The optical imaging lens of claim 1 , wherein BFL is a distance from the image-side surface of the sixth lens element to an image plane along the optical axis, T1 is a thickness of the first lens element along the optical axis, T6 is a thickness of the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: (T6+BFL)/T1≥3.300.

7 . The optical imaging lens of claim 1 , wherein TL is 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, and the optical imaging lens satisfies the relationship: TL/(T4+T5)≤5.100.

8 . The optical imaging lens of claim 1 , wherein T1 is a thickness of the first lens element along the optical axis, and the optical imaging lens satisfies the relationship: (T3+G34)/T1≤2.800.

9 . The optical imaging lens of claim 1 , 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: TTL/(G12+G34)≤5.700.

10 . The optical imaging lens of claim 1 , wherein T6 is a thickness of the sixth lens element along the optical axis, G23 is an air gap between the second lens element and the third lens element along the optical axis, and the optical imaging lens satisfies the relationship: (G23+T3)/T6≤3.100.

11 . The optical imaging lens of claim 1 , wherein T1 is a thickness of the first lens element along the optical axis, and the optical imaging lens satisfies the relationship: (T3+T5)/T1≤4.000.

12 . The optical imaging lens of claim 1 , wherein G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: EFL/(G12+G56)≥1.500.

13 . The optical imaging lens of claim 1 , wherein T6 is a thickness of the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: (T5+T6)/T4≤4.900.

14 . The optical imaging lens of claim 1 , wherein TL is 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, BFL is a distance from the image-side surface of the sixth lens element to an image plane along the optical axis, and the optical imaging lens satisfies the relationship: TL/BFL≤4.200.

15 . The optical imaging lens of claim 1 , wherein T2 is a thickness of the second lens element along the optical axis, G23 is an air gap between the second lens element and the third lens element along the optical axis, and the optical imaging lens satisfies the relationship: (G12+G23)/T2≥1.200.

16 . The optical imaging lens of claim 1 , wherein G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: G12/(G34+G45+G56)≤3.000.

17 . The optical imaging lens of claim 1 , satisfying the relationship: (G12+G45)/T4≤4.600.

18 . The optical imaging lens of claim 1 , wherein 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, and the optical imaging lens satisfies the relationship: (T2+T3+T5)/(T1+T4)≤3.400.

19 . The optical imaging lens of claim 1 , wherein T6 is a thickness of the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: (G12+G34)/T6≥2.400.

20 . The optical imaging lens of claim 1 , wherein T6 is a thickness of the sixth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, and the optical imaging lens satisfies the relationship: (T5+G56)/T6≤2.700.

Assignees

• Genius Electronic Optical Xiamen Co Ltd

Inventors

• Chen Feng
• Chen Baina
• Tang Ruyou

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/62 Primary

  having six components only · CPC title

• G02B27/0025

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

• G02B13/06

  Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} · CPC title