公开(公告)号：EP2322957A1

公开(公告)日：2011-05-18

申请号：EP09175783.1

申请日：2009-11-12

Applicant: poLight AS

Inventor： Kartashov, Vladimir ,  Akram, Muhammad Nadeem

IPC: G02B5/18 ,  G02B27/48

CPC classification number: G02B27/48 ,  G02B5/1828 ,  G02F1/292 ,  G02F1/315 ,  G02F2201/305

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.

Abstract translation: 本发明涉及一种用于改进基于激光的成像投影系统的装置和系统，特别涉及一种根据特定的散斑减少方案来控制激光成像投影系统中的斑点对比度的装置和系统。 根据本发明的装置和系统至少包括在装置的反射表面上具有可编程光栅几何形状的空间光调制器。 一系列控制信号可以提供静态散斑图案或多个不相关的散斑图案。 根据本发明的装置和系统可以利用可编程光栅特征来减少或增加在整个图像中或在系统中投射的图像的部分的斑点。