Camera Lens

Patent metadata

Field	Value
Publication number	US-2017357080-A1
Application number	US-201514913539-A
Country	US
Kind code	A1
Filing date	Jan 7, 2015
Priority date	Jan 7, 2015
Publication date	Dec 14, 2017
Grant date	—

Abstract

Provided is a camera lens, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side of the camera lens to an image side of the camera lens in turn. The first lens is of a positive focal power, an object side surface of the first lens is convex; the second lens is of a negative focal power; the third lens is of a negative focal power, an object side surface of the third lens is concave; the fourth lens is of a positive focal power; the fifth lens is of a positive focal power, an image side surface of the fifth lens is convex; the sixth lens is of a negative focal power, an image side surface of the sixth lens is concave; and the camera lens meets the following formula: 0<f/f4<0.8; 0<T12/T23<0.14.

First claim

1 . A camera lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side of the camera lens to an image side of the camera lens in turn, wherein
the first lens is of a positive focal power, an object side surface of the first lens is convex; the second lens is of a negative focal power; the third lens is of a negative focal power, an object side surface of the third lens is concave; the fourth lens is of a positive focal power; the fifth lens is of a positive focal power, an image side surface of the fifth lens is convex; the sixth lens is of a negative focal power, an image side surface of the sixth lens is concave; and the camera lens meets the following formula:
0< f/f 4<0.8;
0< T 12/ T 23<0.14,
wherein f represents an effective focal length of the camera lens, f4 represents a focal length of the fourth lens, T12 is a distance between the first lens and the second lens along an axial direction, and T23 is a distance between the second lens and the third lens along the axial direction.

2 . The camera lens according to claim 1 , wherein an object side surface of the second lens is convex, an image side surface of the second lens is concave; and an object side surface of the fourth lens is convex.

3 . The camera lens according to claim 1 , wherein
an object side surface of the sixth lens is concave; at least one inflection point is present in the object side surface of the sixth lens and the image side surface of the sixth lens; and the camera lens further comprises an aperture stop arranged between a photographed object and the second lens.

4 . The camera lens according to claim 1 , wherein the camera lens meets the following formula:
1< f 123/ Dr 1 r 6<5.5, wherein f123 represents a combined focal length of the first lens, the second lens and the third lens, and Drlr6 represents a distance from the object side surface of the first lens to an image side surface of the third lens along the axial direction.

5 . The camera lens according to claim 1 , wherein the camera lens further meets the following formula:
0.5< f 123/ f< 2, wherein f123 represents the combined focal length of the first lens, the second lens and the third lens.

6 . The camera lens according to claim 1 , wherein the camera lens further meets the following formula:
0< f 5/ f< 1; and 0<( R 11+ R 12)/( R 11− R 12)<1,
wherein f5 represents a focal length of the fifth lens, and R11 and R12 represent curvature radiuses of the object side surface and the image side surface of the sixth lens, respectively.

7 . The camera lens according to claim 1 , wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all made of plastic, and have at least one aspheric shape surface.

8 . The camera lens according to claim 1 , wherein the image side surface of the third lens is convex.

9 . The camera lens according to claim 1 , wherein an image side surface of the first lens is convex, and an object side surface of the fifth lens is convex.

10 . The camera lens according to claim 1 , wherein an image side surface of the fourth lens is concave.

11 . The camera lens according to claim 2 , wherein the camera lens meets the following formula:
1< f 123/ Dr 1 r 6<5.5, wherein f123 represents a combined focal length of the first lens, the second lens and the third lens, and Drlr6 represents a distance from the object side surface of the first lens to an image side surface of the third lens along the axial direction.

12 . The camera lens according to claim 3 , wherein the camera lens meets the following formula:
1< f 123/ Dr 1 r 6<5.5, wherein f123 represents a combined focal length of the first lens, the second lens and the third lens, and Drlr6 represents a distance from the object side surface of the first lens to an image side surface of the third lens along the axial direction.

13 . The camera lens according to claim 2 , wherein the camera lens further meets the following formula:
0.5< f 123/ f< 2, wherein f123 represents the combined focal length of the first lens, the second lens and the third lens.

14 . The camera lens according to claim 3 , wherein the camera lens further meets the following formula:
0.5< f 123/ f< 2, wherein f123 represents the combined focal length of the first lens, the second lens and the third lens.

15 . The camera lens according to claim 2 , wherein the camera lens further meets the following formula:
0< f 5/ f< 1; and 0<( R 11+ R 12)/( R 11− R 12)<1,
wherein f5 represents a focal length of the fifth lens, and R11 and R12 represent curvature radiuses of the object side surface and the image side surface of the sixth lens, respectively.

16 . The camera lens according to claim 3 , wherein the camera lens further meets the following formula:
0< f 5/ f< 1; and 0<( R 11+ R 12)/( R 11− R 12)<1,
wherein f5 represents a focal length of the fifth lens, and R11 and R12 represent curvature radiuses of the object side surface and the image side surface of the sixth lens, respectively.

17 . The camera lens according to claim 3 , wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all made of plastic, and have at least one aspheric shape surface.

18 . The camera lens according to claim 3 , wherein the image side surface of the third lens is convex.

19 . The camera lens according to claim 3 , wherein an image side surface of the first lens is convex, and an object side surface of the fifth lens is convex.

20 . The camera lens according to claim 3 , wherein an image side surface of the fourth lens is concave.

Assignees

• Zhejiang Sunny Optics Co Ltd

Inventors

• Dai Fujian
• Huang Lin
• Wenren Jianke

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