Journal ArticleDOI
Evaluation of the Optical Transfer Function from an Incoherent Image of a Sector Disc
M. Shah,S.K. Sarkar,A. Basuray +2 more
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TLDR
The image intensity pattern of an edge has been computed considering the edge object as a limiting case of the sector target and the values obtained by the present method tally with those of the actual OTF.Abstract:
This paper deals with the question of the evaluation of the optical transfer function from the image of a sector disc. It is interesting to note that the optical transfer function evaluated by this method differs from the actual OTF, depending on the number of sectors in the object structure used. If the number of sectors is large the values obtained by the present method tally with those of the actual OTF. It is seen that for such measurement, an object target with at least 30 sectors, i.e. thirty bright and thirty dark lines, should be used to obtain reliable results. The image intensity pattern of an edge has also been computed considering the edge object as a limiting case of the sector target.read more
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Optical-transfer-function evaluation utilizing a rotationally symmetric sinusoidal grating and a linear sinusoidal grating of finite height
A. Basuray,M. Shah +1 more
TL;DR: In this article, a rotationally symmetric (circular) grating and a linear grating with finite height were considered, and it was shown that the intensity transfer function varies with the height of the grating.
References
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Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
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Introduction to Fourier optics
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Journal ArticleDOI
Measurement of Contrast Transmission Characteristics in Optical Image Formation
TL;DR: In this article, a method of testing the performance of lenses is worked out, based upon the fact that the light distribution in the image of any one-dimensional test pattern can be determined from the light distortion.
Journal ArticleDOI
Light Distribution in the Image of an Incoherently Illuminated Edge
TL;DR: In this paper, the image of an incoherently illuminated edge is shown to have a simple structure with no diffraction fringes for any state of correction of the imaging system.
Journal ArticleDOI
Coherent Imaging of a Sector Disc
TL;DR: In this article, the amplitude transfer function from a sector-shaped object structure is computed for coherent imaging of a sector disc, which is often used for assessing the performance characteristics of photographic films and other opto-electronic devices.