Speckle noise reduction in the laser mini-projector by vibrating diffuser

被引：12

作者：

Pan, Jui-Wen ^{[1
,2
]}

Shih, Chi-Hao ^{[3
]}

机构：

[1] Natl Chiao Tung Univ, Inst Photon Syst, Tainan 71150, Taiwan

[2] Chi Mei Med Ctr, Dept Med Res, Tainan 71004, Taiwan

[3] Natl Chiao Tung Univ, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan

来源：

JOURNAL OF OPTICS | 2017年 / 19卷 / 04期

关键词：

speckle; illumination system; laser projector;

D O I：

10.1088/2040-8986/aa608d

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We proposed a design for a laser mini-projector with a low speckle contrast value and high contrast ratio that maintains system efficiency. The key design is that two diffusers are located in the two sides of the light tunnel. By vibrating the 30 x 30 diffuser under 100 Hz, the speckle contrast value can be decreased to 2.32% which is invisible to the human eye. Considering the trade-off issue of optical efficiency and speckle noise, the most suitable arrangement with circular diffusers is '30 x 30H, 5 x 5. The vibration direction is at the long side of the light tunnel.

引用

页数：5

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