激光显示中的彩色散斑测量研究

Research on color speckle measurement of laser display

随着激光投影显示技术的不断发展,对电子显示设备的选择变得更加多样化。但由于激光投影显示设备中激光光源具有高度相干性,使得散斑的现象与其他显示设备相比表现得更为明显,会较大程度地影响实际观感。由此设计一种基于XYZ滤光片的彩色散斑测量装置,利用计算机软件控制相机拍摄不同滤光片下的散斑图片,计算红绿蓝白色场的散斑对比度。利用这种方法可以判断不同激光显示设备的散斑状况是否处于一个合理的范围,从而评价激光显示设备的投影质量。

With the continuous development of laser projection display technology,the choice of electronic display equipment has become more diversified.However,due to the high coherence of the laser used for imaging in the laser projection display device,the speckle phenomenon is more obvious than other display devices,which will greatly affect the actual perception.Therefore,a speckle measurement device based on the XYZ filter is designed.The computer software is used to control the camera to take the speckle pictures under different filters,and the speckle contrast of the red,green,blue,and white fields is calculated.This method can be used to determine whether the speckle condition of different laser display devices is in a reasonable range,so as to evaluate the projection quality of laser display devices.