A new FFT based method for general scalar diffraction calculations

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" A new FFT based method for general scalar diffraction calculations "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	151423
Doc. No	:	ET23215
Main Entry	:	Nuri Delen
Title Proper	:	A new FFT based method for general scalar diffraction calculations
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	The Rayleigh-Sommerfeld scalar diffraction integral is the most accuratetool to model the propagation of light inside isotropic and homogeneous mediaas long as the vector nature of light can be ignored. There are two standardways of calculating the Rayleigh-Sornmerfeld scalar diffraction integral, the DirectIntegration (DI) method and the Fast Fourier Transform (FFT) based method.The DI method is slow compared to the FFT based method, but the Dl methodcan be applied to problems where there are tilted or offset optical elements.The present work contains the theoretical and practical aspects of a newFFT based method which can be used to propagate optical fields between tiltedor o f k t planes using full scalar diffraction. The new FFT based method is basedon plane wave decomposition of the optical field. Tilted optical elements aretreated using a special mapping technique between the previous plane coordinatesystem and the next plane tilted coordinate system. OfLsets of optical elementsare handled by multiplying each plane wave component with a phase factor pro-portional to the offset in each spatial coordinate.The sampling size requirement is a half a wavelength and therefore the newFFT based method is suitable for optical systems where the optical elements area few hundred wavelengths across. The new FFT based....-....,....-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL46451.pdf
Title and statement of responsibility and	:	A new FFT based method for general scalar diffraction calculations [Thesis]