Accession Number : AD0707464

Title :   FOURIER ANALYSIS AND NONLINEAR OPTICAL SYSTEMS,

Corporate Author : LOWELL TECHNOLOGICAL INST RESEARCH FOUNDATION MASS

Personal Author(s) : Baker,Adolph ; Korff,David

Report Date : 1969

Pagination or Media Count : 16

Abstract : The Modulation Transfer Function is based on Fourier techniques which imply the validity of the principle of superposition. This is clearly violated in the nonlinear film development process. It becomes necessary to face up to this question if one is to know how much confidence to place in conclusions resulting from such analysis of incoherently illuminated systems. A pseudotransfer function is defined to represent an artificial linear filter which, if it replaced the actual optical and photographic process, would result in precisely the same image as would be produced by the real system. The significance of such a function in a statistical approach and the results of a typical calculation are presented for purpose of illustration. Some of the conditions under which the atmospheric transfer function remains undefined are also reviewed. (Author)

Descriptors :   (*OPTICAL EQUIPMENT, TRANSFER FUNCTIONS), (*PHOTOGRAPHIC EQUIPMENT, LIGHT TRANSMISSION), FOURIER ANALYSIS, NONLINEAR SYSTEMS, MODULATION, DIFFRACTION

Subject Categories : Photography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE