Title:
OPTICAL SYSTEM, PHOTOGRAPHIC APPARATUS, AND MOVABLE PLATFORM
Document Type and Number:
WIPO Patent Application WO/2022/041269
Kind Code:
A1
Abstract:
Disclosed are an optical system, a photographic apparatus, and a movable platform. The optical system is arranged on an image side of an imaging lens of the photographic apparatus for reducing the focal length of the imaging lens. The optical system (100) comprises: a first lens (101) having a positive optical power, a second lens (102) having a negative optical power, a third lens (103) having a positive optical power, a fourth lens (104) having a negative optical power and a fifth lens (105) having a positive optical power which are sequentially arranged from an object side to an image side. The optical system (100) has a positive optical power, and the optical system (100) satisfies the following expression: 0.5 ≤ M ≤ 1, and 0.05 ≤ Ttl/Effl ≤ 0.45, wherein M is the magnification of the optical system (100), Ttl is the distance between the central point of a lens face on an object side of the first lens and the central point of a lens face on an image side of the fifth lens, and Effl is the focal length of the optical system.
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Inventors:
NORDLUND PER (CN)
YE MAOLIN (CN)
YE MAOLIN (CN)
Application Number:
PCT/CN2020/112718
Publication Date:
March 03, 2022
Filing Date:
August 31, 2020
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
G02B13/00; G02B15/10
Foreign References:
| CN111624741A | 2020-09-04 | |||
| JP2015041003A | 2015-03-02 | |||
| JP2020016852A | 2020-01-30 | |||
| US20200271903A1 | 2020-08-27 | |||
| CN104345436A | 2015-02-11 | |||
| CN203365783U | 2013-12-25 | |||
| US4653871A | 1987-03-31 |
Attorney, Agent or Firm:
SHENZHEN LIDAO INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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