Camera lens

Patent metadata

Field	Value
Publication number	US-10816772-B2
Application number	US-201816236535-A
Country	US
Kind code	B2
Filing date	Dec 30, 2018
Priority date	Jul 20, 2018
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The present disclosure provides a camera lens, constituted by eight lenses, and featuring excellent optical characteristics, an ultra-thin appearance, a wide angle and a bright Fno. The camera lens is configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfies specified conditional formulas.

First claim

What is claimed is:

1. A camera lens, configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfying conditional formulas (1) to (4) below:
1.00≤ f 1/ f≤ 1.50  (1);

−8.00≤ f 2/ f≤− 5.00  (2);

−8.00≤ f 3/ f≤− 5.00  (3);

1.00≤ R 5/ R 6≤1.40  (4);

where,
f: a focal length of an overall camera lens;
f1: a focal length of the 1st lens;
f2: a focal length of the 2nd lens;
f3: a focal length of the 3rd lens;
R5: a curvature radius of an object side surface of the 3rd lens;
R6: a curvature radius of an image side surface of the 3rd lens.

2. The camera lens according to claim 1 , satisfying a conditional formula (5) below:
5.00≤ f 4/ f≤ 15.00  (5);

where,
f: the focal length of the overall camera lens;
f4: a focal length of a 4th lens.

3. The camera lens according to claim 1 , satisfying a conditional formula (6) below:
−30.00≤ f 5/ f≤− 2.00  (6);

where,
f: the focal length of the overall camera lens;
f5: a focal length of a 5th lens.

4. The camera lens according to claim 1 , satisfying a conditional formula (7) below:
5.00≤ f 6/ f≤ 70.00  (7);

where,
f: the focal length of the overall camera lens;
f6: a focal length of a 6th lens.

5. The camera lens according to claim 1 , satisfying a conditional formula (8) below:
0.30≤ f 7/ f≤ 1.50  (8);

where,
f: the focal length of the overall camera lens;
f7: a focal length of a 7th lens.

6. The camera lens according to claim 1 , satisfying a conditional formula (9) below:
−1.00≤ f 8/ f≤− 0.30  (9);

where,
f: the focal length of the overall camera lens;
f8: a focal length of an 8th lens.

Assignees

• Aac Acoustic Tech Shenzhen Co Ltd
• Aac Communication Tech Changzhou Co Ltd

Inventors

• Teraoka Hiroyuki

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/64 Primary

  having more than six components · 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

• G02B13/06

  Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} · CPC title