Title:
TWO-LENS PIECE SMALL-DIAMETER LENS HAVING LARGE FIELD OF VIEW
Document Type and Number:
WIPO Patent Application WO/2022/022116
Kind Code:
A1
Abstract:
A two-lens piece small-diameter lens having a large field of view, provided with, in sequence from the object side to the image side along an optical axis: a first lens (L1), an aperture diaphragm (Stop) and a second lens (L2). The first lens (L1) is a negative lens, having a first surface and a second surface, wherein the center of the second surface is concave toward the image side. The second lens (L2) is a positive lens, having a third surface and a fourth surface, wherein the fourth surface is convex toward the image side. The aperture diaphragm (Stop) is positioned between the first lens L1 and the second lens L2, and is used for balancing the outer diameter sizes of the two lens pieces. The use of the two lens pieces allows photographing in a narrow space, meets a small lens outer diameter size requirement and has a large field of view function, and the lens may be used in fields having narrow photographing spaces or narrow lens installation spaces.
Inventors:
CHEN JUNHONG (CN)
ZHANG RUOJIN (CN)
ZHANG RUOJIN (CN)
Application Number:
PCT/CN2021/099857
Publication Date:
February 03, 2022
Filing Date:
June 11, 2021
Export Citation:
Assignee:
HUBEI HUAXIN PHOTOELECTRIC CO LTD (CN)
International Classes:
G02B13/06
Foreign References:
| CN112285881A | 2021-01-29 | |||
| CN212623307U | 2021-02-26 | |||
| CN106842518A | 2017-06-13 | |||
| CN102067005A | 2011-05-18 | |||
| JP2006330575A | 2006-12-07 | |||
| US20170068087A1 | 2017-03-09 | |||
| CN107065148A | 2017-08-18 | |||
| CN109196519A | 2019-01-11 | |||
| JP2014002252A | 2014-01-09 |
Attorney, Agent or Firm:
SHENZHEN ZHIBANGBAN PATENT AGENCY CO., LTD. (CN)
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