Title:
REFLECTIVE DIFFUSER FOR REDUCING LASER SPECKLE AND REFLECTIVE LUMINESCENT WHEEL INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2021/051226
Kind Code:
A1
Abstract:
A diffuser (20) for de-speckling laser light includes a transparent diffuser substrate (50) withde-speckling microstructures disposed on or formed into a first (i. e. front) side (52) thereof, and a reflective film (60) coated onto an opposite second (i. e. back) side (54) of the transparent diffuser substrate (50). An extinction layer (64) may be coated onto the reflective film (60). An anti-reflection (AR) coating (62) may be disposed on the first side (52) of the transparent diffuser substrate (50). A luminescent wheel (10) is also disclosed, including a disk (14) and an optical ring secured to the disk (14) so as to rotate with the disk (14). The optical ring includes at least one fluorescent segment (22) and the aforementioned diffuser (20).
Inventors:
ZHANG WENBO (CN)
YANG XIAOHUA (CN)
YANG XIAOHUA (CN)
Application Number:
PCT/CN2019/105920
Publication Date:
March 25, 2021
Filing Date:
September 16, 2019
Export Citation:
Assignee:
MATERION PREC OPTICS SHANGHAI LIMITED (CN)
International Classes:
G02B26/00; G03B21/20
Foreign References:
| CN105404083A | 2016-03-16 | |||
| CN109870799A | 2019-06-11 | |||
| CN105549312A | 2016-05-04 | |||
| CN108255006A | 2018-07-06 | |||
| CN109061895A | 2018-12-21 | |||
| US20130010353A1 | 2013-01-10 | |||
| US20160349606A1 | 2016-12-01 | |||
| CN207742457U | 2018-08-17 |
Other References:
See also references of EP 4031924A4
Attorney, Agent or Firm:
TEE & HOWE INTELLECTUAL PROPERTY ATTORNEYS (CN)
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