Camera lens

Patent metadata

Field	Value
Publication number	US-9766434-B2
Application number	US-201615256884-A
Country	US
Kind code	B2
Filing date	Sep 6, 2016
Priority date	Dec 21, 2015
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A camera lens is disclosed. The camera lens comprises, from an object side to an image side, a first lens with positive refractive power; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with negative refractive power; a fifth lens with positive refractive power; and a sixth lens with negative refractive power. The camera lens satisfies specified conditions.

First claim

What is claimed is:

1. A camera lens, comprising in order from an object side to an image side:
a first lens with positive refractive power;
a second lens with negative refractive power;
a third lens with positive refractive power;
a fourth lens with negative refractive power;
a fifth lens with positive refractive power; and
a sixth lens with negative refractive power; wherein
the camera lens satisfies the following conditions (1)˜(3):
1.80 ≦f 3/ f≦ 5.00   (1);

0.15 ≦R 1/ R 2≦0.30   (2);

18.00 ≦R 5/ R 6   (3);

where,
f: overall focal distance of the camera lens;
f 3 : focal distance of the third lens;
R 1 : curvature radius of the first lens' object side surface;
R 2 : curvature radius of the first lens' image side surface;
R 5 : curvature radius of the third lens' object side surface;
R 6 : curvature radius of the third lens' image side surface.

2. The camera lens as described in claim 1 further satisfying the following condition (4):
0.75 ≦f 1/ f≦ 1.00   (4);

where,
f: overall focal distance of the camera lens;
f 3 : focal distance of the first lens.

3. The camera lens as described in claim 2 further satisfying the following condition (5):
1.00 ≦R 3/ R 4≦3.00   (5)

where,
R 3 : curvature radius of the second lens' object side surface;
R 4 : curvature radius of the second lens' image side surface.

Assignees

• Tang Han
• Teraoka Hiroyuki
• Aac Technologies Pte Ltd

Inventors

• Tang Han
• Teraoka Hiroyuki

Classifications

• G02B5/005

  Diaphragms (for cameras G03B9/02) · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · 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

• G02B9/64

  having more than six components · CPC title