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给出了光学扫描全息术的基本原理。记录时用实时 FZP与物体强度透射率发生卷积从而产生扫描全息图 ;再现时用与记录时相对应的 FZP与全息图信号发生卷积即可再现出物体的信息。推广了光学扫描全息术 ,提出只要某一实时的光场强度分布函数具有如下性质 :(l)该函数中含有 x,y,z参量且相对于 z参量具有圆对称性 ;(2 )对于某一确定的 z参量 ,该函数的自相关是δ函数 ,就可以把该光场作为光学扫描全息术中的照明光场对物体进行扫描记录以得到扫描全息图。
The basic principle of optical scanning holography is given. Real-time FZP and object intensity transmissivity are convolutioned to generate a scanned hologram during recording, and information of the object can be reproduced by convolution of the FZP and hologram signals corresponding to the time of recording. The optical scanning holography is generalized. It is proposed that as long as a real-time light field intensity distribution function has the following properties: (1) the function contains x, y and z parameters and has circular symmetry with respect to the z parameter; (2) A definite z-parameter whose autocorrelation is a delta function allows the light field to be scanned as an illumination field in optical scanning holography to obtain a scanned hologram.