Verfahren, Vorrichtung und System zur Verringerung des Specklekontrasts

Procédé, dispositif et système pour réduire le contraste de taches

A method, device and system for reducing speckle contrast

Abstract

The present invention relates to a device and system for improving a laser light based imaging projection system, and especially to a device and system for controlling speckle contrast in laser light imaging projection systems according to a specific speckle reduction scheme. A device and system according to the present invention comprises at least on spatial light modulator with a programmable grating geometry on a reflective surface of the device. A series of control signals can then provide a static speckle pattern or a plurality uncorrelated speckle patterns. The device and system according to the present invention can utilize the programmable grating feature to decrease, or increase the speckle in whole images or parts of images being projected in the system.

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