激光技术Issue(2)：177-180,4.DOI:10.7510/jgjs.issn.1001-3806.2014.02.007
基于光纤振动的激光散斑控制
Laser speckle control based on optical fiber vibration
摘要
Abstract
The image gray can be changed by severely the speckle noise , so the image resolution can be reduced and the image quality was decreased .In order to control the speckle noise , using a laser at 405nm wavelength as light source of the microscopic imaging system and a voice coil motor vibrating the optical fiber , images was obtained by the polished lens and captured with a CCD image acquisition card , the speckle noise contrasts were studied .The results show that when the fiber vibration amplitude is stable and the vibration frequency is increased from 4Hz to 55Hz, the image speckle contrasts change in the range of 0.0326~0.1197 and the overall trend gradually becomes smaller .The image speckle contrast levels off when the frequency is more than 51Hz.When the speckle contrast reaches the minimum at 0.0326, the image is clear and the laser imaging speckle can be controlled satisfactorily .关键词
激光光学/激光散斑/散斑对比度/频率Key words
laser optics/laser speckle/speckle contrast/frequency分类
信息技术与安全科学引用本文复制引用
王晓琳,贺锋涛,贾琼瑶,刘佳..基于光纤振动的激光散斑控制[J].激光技术,2014,(2):177-180,4.基金项目
国家自然科学基金资助项目 （）
