Title:
OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/242136
Kind Code:
A1
Abstract:
An optical system, sequentially comprising, from an object side to an image side along an optical axis: a glass screen (E1), an interference screen (S3), a lens group and a color filter (E3). The effective focal length f of the optical system and the entrance pupil diameter (EPD) of the optical system satisfy f/EPD<1.8. The optical system can be used for fingerprint recognition and may have characteristics, such as a large angle of view and a large aperture, and the characteristic of being ultra-thin.
Inventors:
LYU SAIFENG (CN)
WENREN JIANKE (CN)
WENREN JIANKE (CN)
Application Number:
PCT/CN2018/106602
Publication Date:
December 26, 2019
Filing Date:
September 20, 2018
Export Citation:
Assignee:
ZHEJIANG SUNNY OPTICAL CO LTD (CN)
International Classes:
G02B13/00
Foreign References:
| CN105824108A | 2016-08-03 | |||
| CN107195661A | 2017-09-22 | |||
| CN106610519A | 2017-05-03 | |||
| CN106646822A | 2017-05-10 | |||
| US20170220840A1 | 2017-08-03 | |||
| CN107728288A | 2018-02-23 |
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (CN)
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