发明名称 |
AUF EINEM WELLENLÄNGENPLÄTTCHEN BASIERENDE VORRICHTUNG UND METHODE ZUR REDUZIERUNG VON SPECKLES IN LASERBELEUCHTUNGSSYSTEMEN |
摘要 |
<p>A method and apparatus for reducing speckle in a laser illumination system uses a despeckle device including an optical retarder providing an odd integer multiple of substantially half-wave retardation for light emitted from a coherent laser in the laser illumination system. The near half-wave optical retarder has a substantially constant retardance and a spatially varied slow axis. The spatially varied slow axis imposes a phase mask on the beam of light, which provides sub-resolution optical phase modulation to a resolution spot on the detector. The near half-wave optical retarder is actuated mechanically or electrically to vary the sub-resolution optical phase modulation within an integration time of the detector.</p> |
申请公布号 |
AT478357(T) |
申请公布日期 |
2010.09.15 |
申请号 |
AT20090157801T |
申请日期 |
2009.04.10 |
申请人 |
JDS UNIPHASE CORPORATION |
发明人 |
TAN, KIM L.;SHEMO, DAVID M.;MCELDOWNEY, SCOTT |
分类号 |
G02B27/48;G02B27/28;H04N9/31 |
主分类号 |
G02B27/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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