计算全息检测离轴非球面的离散相位计算  

Discrete phase calculation of computer generated hologram for off-axis aspheric surface test

作　　者：李世杰[1,2] 陈强[1] 吴高峰[1] 李良红[1] 鲜林翰[1] 

机构地区：[1]中国科学院光电技术研究所,成都610209 [2]中国科学院研究生院,北京100039

出　　处：《强激光与粒子束》2011年第12期3163-3166,共4页High Power Laser and Particle Beams

基　　金：国家重大专项课题

摘　　要：为了设计检测离轴非球面的计算全息图(CGH),需要对采样点的相位进行计算。通过平移和旋转,将离轴非球面几何中心的法线作为检测光路光轴。在此基础上,采用光线追迹法,对离轴非球面上采样点的相位分布进行了研究,详细推导了离散相位的计算方法,给出了在3维空间坐标系中,离轴非球面上任意一采样点的相位计算公式,并通过计算、对比同一旋转对称非球面的相位分布对该算法进行了验证。结果表明该计算方法正确,且计算精度能够满足CGH的要求。The phase of sample point should be calculated to design the computer generated hologram（CGH） for testing off-axis aspheric surface.The normal of the geometric center of off-axis aspheric surface was seen as the detection optical axis through shift and rotation.Then the phase distribution on off-axis aspheric surface was studied by ray tracing,and a calculation method of discrete phase was deduced,as well as the formulas for phase computation in three-dimensional coordinate system.The validity of this method is proven by calculating and comparing the phase distribution of a rotational symmetry aspheric surface.The results show that this method is correct,and the calculation accuracy can meet the requirement of CGH for off-axis aspheric surface test.

关 键 词：离轴非球面 计算全息图 离散相位 光线追迹 

分 类 号：O438.1[机械工程—光学工程] TB96[理学—光学]