A low speckle laser pico-projector using dynamic light scattering liquid crystal devices*

被引：9
|
作者：
Chen, Yong -Han [1 ]
Pan, Jui-Wen [2 ,4 ]
Jeng, Shie-Chang [3 ,4 ]
机构：
[1] Natl Yang Ming Chiao Tung Univ, Inst Lighting & Energy Photon, Coll Photon, Tainan 711, Taiwan
[2] Natl Yang Ming Chiao Tung Univ, Inst Photon Syst, Coll Photon, Tainan 711, Taiwan
[3] Natl Yang Ming Chiao Tung Univ, Inst Imaging & Biomed Photon, Coll Photon, Tainan 711, Taiwan
[4] 301,Gaofa 3rd Rd, Tainan 711, Taiwan
来源：
DISPLAYS | 2022年 / 75卷
关键词：
Laser speckle; Dynamic light scattering; Liquid crystal; Laser pico-projector; REDUCTION; NOISE; SUPPRESSION; DISPLAYS; SCREEN;
D O I：
10.1016/j.displa.2022.102305
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A dynamic light scattering liquid crystal (DLS-LC) device is applied to reduce speckle from a laser pico-projector. The DLS-LC device produces time-varying scattering patterns, which can decrease the degree of spatial and temporal coherence of the laser and achieve a very effective reduction in the speckle. The influence of the amplitude and frequency of the applied electric field for the DLS-LC device on the light scattering characteristics and speckle contrast are studied. The speckle contrast is reduced by as much as 62% with a low electric field amplitude (4.2 V/mu m).
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页数：6
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