超短脉冲激光选通电子学全息成象系统研究

本文介绍了最早到达光概念,分析了超短脉冲激光电子学全息实现选通最早到达光成象的原理.用超短脉冲激光拍摄全息图,相当于用多色光记录全息图,当用单色光再现这种全息图时,会给再现象造成一个模糊量.在一般全息理论中,只讨论了采用单色光记录全息图,复色光再现所造成的模糊量.因此,本文中讨论的是一个与此相反的问题,即用多色光记录全息图,单色光再现的情况,并且着重讨论了超短脉冲激光记录全息图的情况.最后得出结论,在用超短脉冲激光拍摄全息图时,最好采用象面全息术.

RESEARCH ON ELECTRONIC HOLOGRAPHIC IMAGING SYSTEM USING ULTRASHORT LASER-PULSE

In this paper, the concept of first-arrving-light is described and principle of electronic holography using ultrashort laser-pulse for imaging throllgh highly scattering media is discussedRecording hologram using ultrashort laser-pulse is equal to using multicolour light.Thus, althoughmonochroic light is used to reconstruct this kind of hologram, there is an image blur in thereconstructing image.The expressions of this image blur aewresented.The conclusion is worked outThat is,when ultrashort laser-pulse is used to record hologram,it is better to use plane holography.