数字重现无透镜傅里叶变换X射线全息的实验模拟研究  

An Optically Simulated Experimental Study on the Digital Reconstruction of LLFT X Ray Hologram

作　　者：肖体乔[1] 徐至展[1] 陈建文[1] 韩申生[1] 王晓方[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光学学报》1996年第9期1280-1284,共5页Acta Optica Sinica

摘　　要：参照无透镜傅里叶变换（ＬＬＦＴ）Ｘ射线全息图的记录光路，采用可见光源模拟研究了无透镜傅里叶变换Ｘ射线全息从记录到数字重现的全过程，给出了实验结果，并对光学重现和数字重现结果作了比较，分析了该记录方式存在的一些问题，指出实际Ｘ射线全息记录中可直接使用波带板＋１级衍射而不必在物面加一滤波小孔。分析了利用数字重现消除记录过程中非线性效应的可行性。并着重指出波带板的多级衍射的互干涉对重现象的干扰，应设法消除。The LLFT X ray holography is studied by optical experimental simulation on the whole process from recording to digital reconstruction. A He Ne laser is used as light source and the recording setup is similar to that in LLFT X ray holography. Experimental results are given and a comparison between digital reconstruction and optical reconstruction is made. Some problems in this kind of recording style are analyzed. As a result, we point out that in X-ray hologram recording the +1st diffraction of zone plate can be taken as reference point source directly, rather than filtered by a small hole. The feasibility for eliminating the nonlinearity of recording medium is analyzed. The disturbance of the interference from the different diffractions of zone plate is emphasized.

关 键 词：无透镜 傅里叶变换 X射线 全息 数字重现 

分 类 号：O438[机械工程—光学工程] TB877[理学—光学]