基于运动胶质溶液的激光投影散斑抑制研究

Research on Speckle Suppression of Laser Projection Based on Motion Colloidal Solution

激光散斑会严重影响图像的质量,降低图像的对比度和分辨率,为了抑制激光投影散斑,基于人眼视觉暂留特性和漫散射体散斑抑制原理,搭建了一套基于运动循环胶质溶液的散斑抑制装置,该装置体积小,并能有效抑制散斑,实现散斑对比度低于人眼观测阈值5%的抑制效果,光的透过率可达65%以上,同时该装置比起振动扩散器,在降低噪声及价格上具有明显的优势,具有一定的实用推广价值。

Laser speckle can seriously affect the quality of images,and can reduce the image contrast and resolution.To suppress laser speckle,based on the visual transient characteristics of the human eye and the principle of diffuse scatter speckle suppression,a small-sized laser speckle suppression device is constructed by making use of circulating colloidal solution.The device has a small volume and can effectively suppress speckle,achieving inhibition effects where speckle contrast is 5%lower than the speckle perception limit of the human eye and transmittance of light is higher than 65%.At the same time,this device has obvious advantages in reducing noise and price compared to vibration diffusers,and has certain practical promotion value.