利用平面透射光栅探测激光信息的理论研究  

Theoretical study of detecting laser information by sinusoidal grating

作　　者：赵建君[1] 牛海莎[2] 陈红叶[1] 苏平[2] 李易难[2] 

机构地区：[1]军械工程学院理化教研室,河北石家庄050003 [2]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《激光与红外》2013年第7期799-802,共4页Laser & Infrared

摘　　要：利用傅里叶变换理论研究了激光以任意角度入射平面透射光栅的夫琅和费衍射,并对衍射图像的相对光强分布进行了分析,得到了零级和各级明纹中心位置与入射激光信息之间的关系以及对应的明纹宽度。通过光学系统设计,只提取零级和正负一级明纹中心位置,进行数据处理后反向推导出了入射激光的波长和方向与明纹位置的关系,进而获得了计算入射激光参数的方法。根据计算结果提出了采用CCD观测衍射图像、利用高速信号处理数据系统的样机设计方案。在对样机各类参数进行了论证的基础上,推算了样机性能。In this paper, Fraunhofer diffraction of plane transmission grating brought by random incidence laser is stud- ied through Fourier transformation theory. The distribution of comparative light intensity is analyzed, and relation of bright brand＇ s location and incidence laser＇ s information is achieved. By data processing, the method of computing la- ser parameters is achieved. On this base, the design of a prototype machine is brought forward. In the design, the dif- fraction images are observed by CCD, the data system is processed by high speed signal processor. By the argument of instruction＇s parameters, the performance of prototype machine is deduced.

关 键 词：平面透射弦光栅 夫琅和费衍射 激光参数 明纹位置 样机设计 

分 类 号：TN247[电子电信—物理电子学]