https://scholars.lib.ntu.edu.tw/handle/123456789/387046
標題: | Laser speckle reduction by phase range limited computer generated hologram in laser projection display system | 作者: | HOANG-YAN LIN | 公開日期: | 2014 | 卷: | 53 | 期: | 27 | 起(迄)頁: | G157-G162 | 來源出版物: | Applied Optics | 摘要: | The speckle phenomenon is an annoyance in laser projection display systems. We propose a novel speckle suppression method that utilizes the interference concept on a pixel point, which reduces the speckle contrast (SC) of the project image by limiting the phase distribution range in the optical field. The SC formula is derived in the uniform interval phase range for partially developed speckle conditions, showing that the SC can be lowered by lessening the phase range limitation. In the ideal simulation model, the SC can be reduced from 98.77% to 0% as the phase range limitation varies from 2π to 0. The phase range limitation model is a novel method using a computer generated hologram to provide beam shaping and phase limitation. In a more realistic simulation model, the SC is reduced from 99.18% to 16.68%. © 2014 Optical Society of America. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942367234&doi=10.1364%2fAO.53.00G157&partnerID=40&md5=16096cb7dea79db50dfab1448876a194 http://scholars.lib.ntu.edu.tw/handle/123456789/387046 |
DOI: | 10.1364/AO.53.00G157 | SDG/關鍵字: | Display devices; Electron holography; Holograms; Holographic displays; Optical projectors; Speckle; Computer generated holograms; Laser projection displays; Phase distribution; Realistic simulation; Simulation model; Speckle contrasts; Speckle phenomenon; Speckle suppression; Computer generated holography |
顯示於: | 光電工程學研究所 |
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