Title:
SPECKLE ELIMINATION APPARATUS, LASER LIGHT SOURCE AND LASER PROJECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/100451
Kind Code:
A1
Abstract:
A speckle elimination apparatus, a laser light source and a laser projection system, the speckle elimination apparatus comprising a wave plate (100) and a transmission plate (200) respectively arranged on a laser beam light path, the wave plate (100) and the transmission plate (200) having similar refractive indices and closely arranged adjacent sides, the wave plate (100) being arranged so that an incident surface allows a portion of an incident laser beam to pass through, the transmission plate (200) being arranged so that an incident surface allows the remainder of the incident laser beam to pass through, the portion of the incident laser beam being 25%-75% of the incident laser beam. The speckle elimination apparatus eliminates the phenomenon of laser speckle, and prevents stray light from being produced during laser speckle elimination.
Inventors:
YANG LEBAO (CN)
Application Number:
PCT/CN2017/115238
Publication Date:
May 31, 2019
Filing Date:
December 08, 2017
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
G02B27/48; G03B21/20
Foreign References:
| US20120062848A1 | 2012-03-15 | |||
| CN103376636A | 2013-10-30 | |||
| CN107193132A | 2017-09-22 | |||
| CN104614867A | 2015-05-13 | |||
| CN101493582A | 2009-07-29 | |||
| CN103323958A | 2013-09-25 | |||
| US20070223091A1 | 2007-09-27 | |||
| US20090174941A1 | 2009-07-09 |
Attorney, Agent or Firm:
BEIJING JANLEA PATENT AGENCY CO., LTD. (CN)
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