Title:
OPTICAL SYSTEM AND PHOTOGRAPHING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/109042
Kind Code:
A1
Abstract:
An optical system and a photographing apparatus. The optical system (10) comprises: a first lens group (1), a second lens group (2), and a third lens group (3) which are arranged in sequence from an object side to an image side, the first lens group (1) and the second lens group (2) both having positive focal power, and the third lens group (3) having negative focal power. The optical system (10) satisfies: 0.85<|f1/f|<4.5, 0.5<|f2/f|<1.5, 3<|f3/f|<10, 1<|TL/f|<1.5, 0<|T1/T2|<0.5, 0<|T3/T2|<0.5, wherein f, f1, f2, and f3 are focal lengths, and TL, T1, T2, and T3 are distances between the lens groups, a diagram, and an imaging plane.
Inventors:
GAN RUTING (CN)
Application Number:
PCT/CN2019/123117
Publication Date:
June 10, 2021
Filing Date:
December 04, 2019
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
G02B15/14; G02B9/00; G02B13/00; G02B15/00
Domestic Patent References:
| WO2019105259A1 | 2019-06-06 | |||
| WO2018216789A1 | 2018-11-29 |
Foreign References:
| CN110456482A | 2019-11-15 | |||
| CN106918894A | 2017-07-04 | |||
| CN1591076A | 2005-03-09 | |||
| CN107807439A | 2018-03-16 | |||
| CN107632376A | 2018-01-26 | |||
| US20100149649A1 | 2010-06-17 |
Attorney, Agent or Firm:
SHENZHEN LIDAO INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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