Title:
OPTICAL SYSTEM AND PHOTOGRAPHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/056156
Kind Code:
A1
Abstract:
An optical system (10) and a photographing device (20) comprising the optical system (10). The optical system (10) comprises: a first lens (101), a second lens (102) and a third lens (103) which are sequentially arranged from an object side to an image side, wherein the first lens (101) and the second lens (102) both have a negative refractive power, and the third lens (103) has a positive refractive power; the optical system (10) satisfies: 0< |f1/f2|< 1, 1.5<|f2/f3|< 3, vd1>20, vd2>45, vd3>20; wherein f1, f2 and f3 are respectively the focal lengths of the lenses (101, 102, 103); and vd1, vd2 and vd3 are respectively the Abbe numbers of the lenses (101, 102, 103). The optical system (10) has a compact structure and strong versatility, increases the field of view angle of the photographing device (20), and improves the imaging quality of the photographing device (20).
Inventors:
GAN RUTING (CN)
Application Number:
PCT/CN2019/107357
Publication Date:
April 01, 2021
Filing Date:
September 23, 2019
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
G02B13/06; G02B13/18; G02B15/10
Foreign References:
| JP2019070705A | 2019-05-09 | |||
| CN103293641A | 2013-09-11 | |||
| US20160054546A1 | 2016-02-25 | |||
| JP2017097205A | 2017-06-01 | |||
| JP2006084736A | 2006-03-30 | |||
| JP2002214529A | 2002-07-31 | |||
| JPH095625A | 1997-01-10 |
Attorney, Agent or Firm:
SHENZHEN LIDAO INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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