Camera lens

Patent metadata

Field	Value
Publication number	US-9939617-B2
Application number	US-201715416863-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Jun 16, 2016
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A camera lens includes, arranged sequentially 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; fourth lens with positive refractive power; and a fifth lens with negative refractive power. The camera lens satisfies specific conditions.

First claim

What is claimed is:

1. A camera lens comprising, arranged sequentially 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 positive refractive power;
a fifth lens with negative refractive power; wherein the camera lens satisfies the following conditions (1)˜(5):
0.65≤ f 1/ f≤ 0.75  (1)

−1.40≤ f 2/ f≤− 1.25  (2)

10.00≤ f 3/ f≤ 24.00  (3)

−1.20≤( R 1+ R 2)/( R 1− R 2)≤−1.00  (4)

1.00≤( R 3+ R 4)/( R 3− R 4)≤2.00  (5)

where,
f: overall focal distance of the camera lens;
f1: focal distance of the first 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;
R3: curvature radius of the second lens' object side surface;
R4: curvature radius of the second lens' image side surface.

2. The camera lens as described in claim 1 further satisfying the following condition (6):
0.50≤ f 4/ f≤ 0.72  (6)

where,
f: overall focal distance of the camera lens;
f4: focal distance of the fourth lens.

Assignees

• Fang Chunhuan
• Teraoka Hiroyuki
• Aac Technologies Pte Ltd

Inventors

• Fang Chunhuan
• Teraoka Hiroyuki

Classifications

• G02B27/0025

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

• G02B5/005

  Diaphragms (for cameras G03B9/02) · 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

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/60

  having five components only · CPC title