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Patent Searching and Data


Title:
OPTICAL SYSTEM, LENS MODULE, AND TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/179309
Kind Code:
A1
Abstract:
An optical system (10), a lens module (20), and a terminal device (30). The optical system (10), arranged in order from an object side to an image side, comprises a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7), the first lens (L1) and the fifth lens (L5) have negative refractive powers, and the remaining lenses have positive refractive powers; the optical system (10) satisfies the following conditional relation: 40 < (HFOV × f) / Imgh < 60; HFOV is the horizontal field of view of the optical system (10), f is the effective focal length of the optical system (10), and Imgh is the image height corresponding to the horizontal field of view of the optical system (10). By means of a suitable configuration of the refractive powers of the lenses from the first lens (L1) to the seventh lens (L7) in the optical system (10), as well as the restriction on (HFOV × f) / Imgh, the optical system (10) has long focal length and high resolution, can clearly photograph objects at a relatively far distance, has better picture quality, and produces more detailed pictures.

Inventors:
CAI XIONGYU (CN)
LAN BINLI (CN)
ZHOU RUI (CN)
ZHAO DI (CN)
Application Number:
PCT/CN2020/079310
Publication Date:
September 16, 2021
Filing Date:
March 13, 2020
Export Citation:
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Assignee:
TIANJIN OFILM OPTO ELECTRONICS CO LTD (CN)
International Classes:
G02B13/00; G02B13/18
Domestic Patent References:
WO2010096198A12010-08-26
Foreign References:
CN107065141A2017-08-18
CN107884913A2018-04-06
CN106772951A2017-05-31
CN204241748U2015-04-01
CN110579865A2019-12-17
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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