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Imaging by a transmission microscope and microphotometry are the basis of a new method to analyze thick refractive index gratings. The method permits to determine not only the fundamental and higher Fourier coefficients of the dielectric grating, but also their phase relationship. It is shown, how gratings with a depths profile can be analyzed.
R. A. Rupp,G. Wittenbecher, andE. Kratzig
"Imaging Of Thick Phase Gratings", Proc. SPIE 0702, International Topical Meeting on Image Detection and Quality, (18 May 1987); https://doi.org/10.1117/12.966795
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R. A. Rupp, G. Wittenbecher, E. Kratzig, "Imaging Of Thick Phase Gratings," Proc. SPIE 0702, International Topical Meeting on Image Detection and Quality, (18 May 1987); https://doi.org/10.1117/12.966795