Articles

Performance predictions of a Schwarzschild imaging microscope for soft x‐ray applications

[+] Author Affiliations
Anita Kotha

University of Central Florida Center for Research and Education in Optics and Lasers (CREOL) P.O. Box 162700 Orlando, Florida 32816

Opt. Eng. 35(8), 2423-2436 (Aug 01, 1996). doi:10.1117/1.601011
History: Received Oct. 10, 1995; Revised Feb. 13, 1996; Accepted Feb. 13, 1996
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Abstract

The design of a Schwarzschild imaging microscope for soft x‐ray applications has been reported by Hoover and Shealy. Based upon a geometrical ray‐trace analysis of the residual design errors, diffraction‐limited performance at a wavelength of 100 A˚ was predicted over an object size (diameter) of 0.4 mm. We expand on the analysis of that design by determining the total image degradation due to diffraction, geometrical aberrations, and scattering effects due to residual optical fabrication errors. A linear systems treatment of surface scattering phenomena is used to model the image degradation effects of surface irregularities over the entire range of relevant spatial frequencies. This includes small angle scattering effects due to mid spatial frequency surface errors falling between the traditional ‘‘figure’’ and ‘‘finish’’ specifications. The implementation of this scattering theory as a general performance prediction code is validated by excellent agreement with limited test data for a different Schwarzschild microscope at a wavelength of 73 A˚. Finally, image quality predictions are presented parametrically to provide insight into the optical fabrication tolerances necessary to meet desired image quality requirements. © 1996 Society of Photo−Optical Instrumentation Engineers.

Topics

Microscopes

Citation

James E. Harvey ; Kristin L. Lewotsky and Anita Kotha
"Performance predictions of a Schwarzschild imaging microscope for soft x‐ray applications", Opt. Eng. 35(8), 2423-2436 (Aug 01, 1996). ; http://dx.doi.org/10.1117/1.601011


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