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SPECKLE REDUCTION BY ANGULAR SCANNING FOR LASER PROJECTION DISPLAYS
SPECKLE REDUCTION BY ANGULAR SCANNING FOR LASER PROJECTION DISPLAYS
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机译:通过角度扫描减少激光投影显示的斑点
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摘要
The present invention provides a system (200) (300) (700) (800) and method for the reduction of speckle by applying a moving mirror (202) in the light engine of a projector. By imaging the mirror surface onto the entrance face of a multimode wave-guide (204), the beam enters the wave-guide (204) at a time -varying angle. When this wave-guide (204) is used to illuminate a display panel, the projected image on the wall has a time-varying speckle pattern. Since the period of the mirror is well below the integration time of the eye, a reduced speckle intensity is perceived. The use of the wave-guide (204) further reduces the speckle intensity due to mode scrambling.
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