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Patent Searching and Data


Title:
OPTICAL PROJECTION SYSTEM WITH MICRO-LENS ARRAYS
Document Type and Number:
WIPO Patent Application WO/2022/033020
Kind Code:
A1
Abstract:
An optical projection system with micro-lens arrays, the system comprising a light source (10), a collimating lens (20), a first micro-lens array (30), a projection source (40), a positive lens module (50), a second micro-lens array (60) and a receiving surface (70), which are arranged in sequence. The first micro-lens array (30) comprises n first micro-lens units (31) arranged in an array, the projection source (40) comprises n projection image units (41) arranged in an array, and the second micro-lens array (60) comprises n second micro-lens units (61) arranged in an array. The first micro-lens unit (31) and the second micro-lens unit (61) opposite each other have a common optical axis. The distance between the projection source (40) and the positive lens module (50) is s, the distance between the second micro-lens array (60) and the receiving surface (70) is L', the equivalent focal length F of the positive lens module (50) is equal to L', the focal length f1 of each first micro-lens unit (31) is approximately equal to s, and the focal length f2 of each second micro-lens unit (61) is equal to s. In this way, real image sub-units can be combined and overlapped on the receiving surface (70), and crosstalk between adjacent optical channels can be avoided.

Inventors:
JIANG CHENG (CN)
SHE JUN (CN)
NAN JIXUE (CN)
Application Number:
PCT/CN2021/079797
Publication Date:
February 17, 2022
Filing Date:
March 09, 2021
Export Citation:
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Assignee:
YEJIA OPTICAL TECH GUANGDONG CORPORATION (CN)
International Classes:
G02B3/00; G03B21/14
Foreign References:
CN111367136A2020-07-03
CN111856852A2020-10-30
CN106647138A2017-05-10
CN106019795A2016-10-12
CN111176056A2020-05-19
CN1375723A2002-10-23
JP2004361980A2004-12-24
Attorney, Agent or Firm:
SHENZHEN KANGHONG INTELLECTUAL PROPERTY AGENT CO., LTD. (CN)
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