Title:
ULTRA-WIDE ANGLE BROADBAND POLARIZATION IMAGING SYSTEM BASED ON METASURFACE, AND DETECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/109412
Kind Code:
A1
Abstract:
An ultra-wide angle broadband polarization imaging system based on a metasurface, and a detection apparatus, the imaging system comprising a first lens (L1) having negative optical power, a linear polarizer (P1), a 1/4 wave plate (P2), a diaphragm (STO), a second lens (L2) having positive optical power, a third lens (L3) having positive optical power, and the metasurface (M), wherein an object side surface and an image side surface of the lens are planar or spherical; and the phase distribution required for the system in a broadband spectrum band is achieved by setting different rotation angles θ of a unit structure of the metasurface. The imaging system can achieve ultra-wide angle imaging in a broadband wave band, can also perform imaging on linearly polarized light in different polarized states by means of mechanically rotating the linear polarizer (P1) and the 1/4 wave plate (P2), has a field of view close to 180°, a wide wave band coverage and good imaging quality, and has a short total length and low weight, thereby facilitating integration with other devices, and can acquire rich information about an imaged target, thereby facilitating carriage on a flight apparatus to monitor the environment and is directly applicable to the fields of monitoring for security and protection, etc.
Inventors:
LUO XIANGANG (CN)
PU MINGBO (CN)
XIE TING (CN)
ZHANG FEI (CN)
MA XIAOLIANG (CN)
PU MINGBO (CN)
XIE TING (CN)
ZHANG FEI (CN)
MA XIAOLIANG (CN)
Application Number:
PCT/CN2022/132186
Publication Date:
June 22, 2023
Filing Date:
November 16, 2022
Export Citation:
Assignee:
INST OPTICS & ELECTRONICS CAS (CN)
International Classes:
G02B13/06; G01D5/40; G02B1/00; G02B13/00
Foreign References:
| CN114217413A | 2022-03-22 | |||
| CN102687054A | 2012-09-19 | |||
| CN111722392A | 2020-09-29 | |||
| CN105929520A | 2016-09-07 | |||
| CN108037577A | 2018-05-15 | |||
| CN108646427A | 2018-10-12 | |||
| CN112130338A | 2020-12-25 | |||
| CN112379469A | 2021-02-19 | |||
| CN112748521A | 2021-05-04 | |||
| US20180180486A1 | 2018-06-28 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
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