Title:
OPTICAL STRUCTURE, OPTICAL SYSTEM AND OPTICAL METHOD FOR ELIMINATING LASER PROJECTION SPECKLES
Document Type and Number:
WIPO Patent Application WO/2018/133363
Kind Code:
A1
Abstract:
Disclosed are an optical structure, optical system and optical method for eliminating laser projection speckles, aimed at overcoming the current defect of energy efficiency reduction during eliminating a speckle phenomenon in a miniature laser projection display technique by means of improving the spatial difference. The optical structure comprises laser sources (L1, L2, L3), optical mixing rods (Lp1, Lp2, Lp3), digital micro-mirror devices (D1, D2, D3), and a DMD array, wherein laser beams emitted by the laser sources (L1, L2, L3) are totally reflected multiple times in the optical mixing rods (Lp1, Lp2, Lp3); emergent light formed through total reflection multiple times enters the digital micro-mirror devices (D1, D2, D3) having digital holographic source information loaded therein; and emergent laser beams from the digital micro-mirror devices (D1, D2, D3) are reflected by the DMD array to a display terminal. Under the premise that a speckle phenomenon can be effectively eliminated, the optical structure solves the current contradiction between speckle elimination and energy efficiency in a laser speckle elimination technique, and also has the advantages of simple structure and easy implementation.
Inventors:
CHENG CHANGHE (CN)
Application Number:
PCT/CN2017/095151
Publication Date:
July 26, 2018
Filing Date:
July 31, 2017
Export Citation:
Assignee:
NIO CO LTD (CN)
International Classes:
G03B21/20
Foreign References:
| CN103597400A | 2014-02-19 | |||
| CN106773490A | 2017-05-31 | |||
| CN102474630A | 2012-05-23 | |||
| US20030039036A1 | 2003-02-27 | |||
| CN102472957A | 2012-05-23 | |||
| US20080079904A1 | 2008-04-03 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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