LENS SYSTEM, PHOTOGRAPHING APPARATUS AND MOVABLE BODY

WIPO Patent Application WO/2020/253556

A1

Provided is a miniature lens system (100) with a large image size and a high optical performance. The lens system (100) comprises, from an object side to an image side, a first positive lens set (110), an aperture stop (S), and a second positive lens set (120). When focusing from an infinite focusing state to a close object focusing state, the first lens set (110) and the second lens set (120) move from the image side to the object side at a fixed interval therebetween on an optical axis; the first lens set (110) comprises, sequentially from the object side, three or more lenses, namely one or more glued lenses and a meniscus aspheric lens (L3) that is convex toward the object side; and the second lens set (120) comprises, sequentially from the object side, four or more lenses, namely one or more glued lenses and a meniscus aspheric lens (L7) that is concave toward the object side. Regarding a focal length f of the whole system, and a focal length f1 of the first lens set (110), a distance TL (a back focal length being in air conversion length) on the optical axis from a lens face closest to the object side to an image plane of the first lens set (110) when focusing to infinity, and the maximum image height Y satisfy 0.5 < f/f1 < 1.1 and 1.9 < TL/Y < 2.4.

NAKATSUJI TATSUYA (CN)
MATSUNAGA SHIGEHIKO (CN)
ADACHI TOMOKO (CN)

PCT/CN2020/094712

December 24, 2020

June 05, 2020

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SZ DJI TECHNOLOGY CO LTD (CN)

G02B15/14; G02B9/00; G02B13/00; G02B15/00

CN102298200A	2011-12-28
CN109164562A	2019-01-08
CN109116532A	2019-01-01
CN108363193A	2018-08-03
CN101592776A	2009-12-02
US20120056976A1	2012-03-08

CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)

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