Title:
METASURFACE OPTICAL ELEMENT, DESIGN METHOD AND STRUCTURED LIGHT PROJECTION MODULE
Document Type and Number:
WIPO Patent Application WO/2023/024381
Kind Code:
A1
Abstract:
The present application provides a metasurface optical element, a design method and a structured light projection module, which relate to the technical field of optics. The metasurface optical element comprises: a substrate and a plurality of nanometer antennas which are provided on the substrate and which modulate incident beams by means of transmission phases. The size of at least two nanometer antennas are different, and the plurality of nanometer antennas are distributed in an array on the substrate. The distance between the centers of two adjacent nanometer antennas is the same, and the transmission phase of each nanometer antenna is the superimposition of a collimation phase and a diffraction phase. Therefore, the formed metasurface optical element may have collimation and diffraction functions at the same time, that is, a collimation element and a diffraction element are integrated. Space occupied by existing collimation and diffraction elements as two independent optical elements is effectively reduced; meanwhile, since the alignment assembly of the collimation element and diffraction element is omitted, alignment error caused by the alignment assembly may thus be effectively reduced.
Inventors:
WANG ZHAOKUN (CN)
WU WEIMING (CN)
LIU FENGLEI (CN)
WU WEIMING (CN)
LIU FENGLEI (CN)
Application Number:
PCT/CN2021/142516
Publication Date:
March 02, 2023
Filing Date:
December 29, 2021
Export Citation:
Assignee:
ZHEJIANG CRYSTAL OPTECH CO LTD (CN)
International Classes:
G02B5/18; G02B27/00; G02B27/30; G02B27/42
Foreign References:
| CN113671612A | 2021-11-19 | |||
| CN113671613A | 2021-11-19 | |||
| CN111522190A | 2020-08-11 | |||
| CN110221447A | 2019-09-10 |
Other References:
WANG QIU‐HUA, NI PEI‐NAN, XIE YI‐YANG, KAN QIANG, CHEN PEI‐PEI, FU PAN, DENG JUN, JIN TAI‐LAI, CHEN HONG‐DA, LEE HO WAI HOWARD, XU: "On‐Chip Generation of Structured Light Based on Metasurface Optoelectronic Integration", LASER & PHOTONICS REVIEWS, WILEY-VCH VERLAG, DE, vol. 15, no. 3, 1 March 2021 (2021-03-01), DE , pages 2000385, XP093038935, ISSN: 1863-8880, DOI: 10.1002/lpor.202000385
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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