Optical imaging lens assembly

Patent metadata

Field	Value
Publication number	US-2019121063-A1
Application number	US-201816226181-A
Country	US
Kind code	A1
Filing date	Dec 19, 2018
Priority date	Jul 31, 2017
Publication date	Apr 25, 2019
Grant date	—

Abstract

The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has a positive refractive power, and each of the second lens, the third lens, and the sixth lens has a negative refractive power. At least one of the fourth lens or the fifth lens has a positive refractive power. The object-side surface of the first lens and the image-side surface of the fourth lens are convex surfaces. The image-side surface of the second lens and the image-side surface of the sixth lens are concave surfaces. A total effective focal length f of the optical imaging lens assembly and a radius of curvature R 9 of an object-side surface of the fifth lens satisfy: f/|R 9|≤0.35.

First claim

What is claimed is:

1 . An optical imaging lens assembly comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,
wherein the first lens has a positive refractive power; each of the second lens, the third lens, and the sixth lens has a negative refractive power; at least one of the fourth lens or the fifth lens has a positive refractive power; an object-side surface of the first lens and an image-side surface of the fourth lens are convex surfaces; an image-side surface of the second lens and an image-side surface of the sixth lens are concave surfaces; and a total effective focal length f of the optical imaging lens assembly and a radius of curvature R 9 of an object-side surface of the fifth lens satisfy: f/|R 9 |≤0.35.

2 . The optical imaging lens assembly according to claim 1 , wherein the total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.8.

3 . The optical imaging lens assembly according to claim 2 , wherein an effective focal length f 1 of the first lens and an effective focal length f 2 of the second lens satisfy: −1<f 1 /f 2 <0.

4 . The optical imaging lens assembly according to claim 2 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f 1 of the first lens satisfy: 1<f/f 1 <1.5.

5 . The optical imaging lens assembly according to claim 2 , wherein a center thickness CT 1 of the first lens on the optical axis and a center thickness CT 2 of the second lens on the optical axis satisfy: 2.0<CT 1 /CT 2 <3.5.

6 . The optical imaging lens assembly according to claim 2 , wherein the total effective focal length f of the optical imaging lens assembly and a radius of curvature R 12 of the image-side surface of the sixth lens satisfy: 2. 5<f/R 12 <4.0.

7 . The optical imaging lens assembly according to claim 2 , wherein the total effective focal length f of the optical imaging lens assembly and a radius of curvature R 1 of the object-side surface of the first lens satisfy: 2≤f/R 1 <2.5.

8 . The optical imaging lens assembly according to claim 2 , wherein the fourth lens has a positive refractive power, and an effective focal length f 4 of the fourth lens and the total effective focal length f of the optical imaging lens assembly satisfy: 0.7<f 4 /f<1.2.

9 . The optical imaging lens assembly according to claim 2 , wherein an abbe number V 1 of the first lens and an abbe number V 2 of the second lens satisfy: 2.0<V 1 /V 2 <4.0.

10 . The optical imaging lens assembly according to claim 2 , wherein an incident angle β 62 of an upper ray of a maximal field of view entering on the image-side surface of the sixth lens satisfies: 7°<β 62 <12°.

11 . An optical imaging lens assembly comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,
wherein the first lens has a positive refractive power, and an object-side surface of the first lens is a convex surface; the second lens has a negative refractive power, and an image-side surface of the second lens is a concave surface; the third lens has a positive refractive power or a negative refractive power; the fourth lens has a positive refractive power, and an image-side surface of the fourth lens is a convex surface; the fifth lens has a positive refractive power or a negative refractive power, an object-side surface of the fifth lens is a concave surface, and an image-side surface of the fifth lens is a convex surface; the sixth lens has a negative refractive power, and an image-side surface of the sixth lens is a concave surface; and a total effective focal length f of the optical imaging lens assembly and a radius of curvature R 10 of the image-side surface of the fifth lens satisfy: f/|R 10 |≤0.5.

12 . The optical imaging lens assembly according to claim 11 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f 1 of the first lens satisfy: 1<f/f 1 <1.5.

13 . The optical imaging lens assembly according to claim 11 , wherein an effective focal length f 4 of the fourth lens and the total effective focal length f of the optical imaging lens assembly satisfy: 0.7<f 4 /f<1.2.

14 . The optical imaging lens assembly according to claim 12 , wherein the effective focal length f 1 of the first lens and an effective focal length f 2 of the second lens satisfy: −1<f 1 /f 2 <0.

15 . The optical imaging lens assembly according to claim 14 , wherein an abbe number V 1 of the first lens and an abbe number V 2 of the second lens satisfy: 2. 0<V 1 /V 2 <4.0.

16 . The optical imaging lens assembly according to claim 15 , wherein a center thickness CT 1 of the first lens on the optical axis and a center thickness CT 2 of the second lens on the optical axis satisfy: 2. 0<CT 1 /CT 2 <3.5.

17 . The optical imaging lens assembly according to claim 11 , wherein the total effective focal length f of the optical imaging lens assembly and a radius of curvature R 1 of the object-side surface of the first lens satisfy: 2≤f/R 1 <2.5.

18 . The optical imaging lens assembly according to claim 11 , wherein the total effective focal length f of the optical imaging lens assembly and a radius of curvature R 12 of the image-side surface of the sixth lens satisfy: 2. 5<f/R 12 <4.0.

19 . The optical imaging lens assembly according to claim 18 , wherein an incident angle β 62 of an upper ray of a maximal field of view entering on the image-side surface of the sixth lens satisfies: 7°<β 62 <12°.

20 . The optical imaging lens assembly according to claim. 11 , wherein the total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.8.

Assignees

• Zhejiang Sunny Optical Co Ltd

Inventors

• Li Ming
• Yang Jian
• He Lingbo

Classifications

• G02B27/0025

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

• G02B7/04

  with mechanism for focusing or varying magnification · CPC title

• G02B9/62 Primary

  having six components only · CPC title

• G02B13/0045

  having five or more lenses · CPC title