A study of the image contrast in Fresnel zone plate imaging of extended sources |
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| Authors: | LeRoy R Price |
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| Institution: | Department of Physics, University of California, Irvine, California 92664, USA |
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| Abstract: | The image contrast is experimentally demonstrated to be a particular function of various parameters including the area of the source divided by the area of the central Fresnel zone. Over 150 images were analyzed and the best fit parameters are reported. It is also shown that the best contrast is obtained by a new technique in which the projection transparency is photographically reversed before image reconstruction. |
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