Camera lens

Patent metadata

Field	Value
Publication number	US-9759896-B1
Application number	US-201615257440-A
Country	US
Kind code	B1
Filing date	Sep 6, 2016
Priority date	Feb 24, 2016
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A camera lens is disclosed. The camera lens includes six piece ultra-thin and wide angle lenses with excellent optical properties and with chromatic aberration sufficiently corrected as follows: 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 which are arranged sequentially from object side. The camera lens is characterized in that it meets specified conditions.

First claim

What is claimed is:

1. A camera lens comprising, in an 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)˜(4):
−5.00≦ f 2/ f≦− 1.60  (1);

1.80≦ f 3/ f≦ 5.00  (2);

−1.80≦( R 1+ R 2)/( R 1− R 2)≦−1.30  (3);

0.70≦( R 5+ R 6)/( R 5− R 6)≦1.50  (4);

where,
f: overall focal distance of the camera lens;
f2: focal distance of the second lens;
f3: focal distance of the third lens;
R1: curvature radius of the first lens' object side surface;
R2: curvature radius of the first lens' image side surface;
R5: curvature radius of the third lens' object side surface;
R6: curvature radius of the third lens' image side surface.

2. The camera lens as described in claim 1 further satisfying the following condition (5):
1.80≦( R 3+ R 4)/( R 3− R 4)≦4.00  (5);

where,
R3: curvature radius of the second lens' object side surface;
R4: curvature radius of the second lens' image side surface.

3. The camera lens as described in claim 1 further satisfying the following condition (6):
0.07≦ d 5/ f≦ 0.12  (6);

where,
f: overall focal distance of the camera lens;
d5: center thickness of the third lens L3.

Assignees

• Tang Han
• Teraoka Hiroyuki
• Aac Technologies Pte Ltd

Inventors

• Tang Han
• Teraoka Hiroyuki

Classifications

• G02B27/0025

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

• G02B9/62

  having six components only · 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

• G02B5/005

  Diaphragms (for cameras G03B9/02) · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title