Low Frequency De-Emphasis Of The MTF. II Two-Dimensional Case.

N. Konforti; E. Marom

doi:10.1117/12.936156

15 April 1983 Low Frequency De-Emphasis Of The MTF. II Two-Dimensional Case.

N. Konforti, E. Marom

Proceedings Volume 0422, 10th Intl Optical Computing Conf; (1983) https://doi.org/10.1117/12.936156
Event: 10th International Optical Computing Conference, 1983, Cambridge, United States

Abstract

A method of modifying the shape of the modu-lation transfer function of non coherent optical systems based on simultaneous subtraction in real time of the responses of two systems having different pupils is described. When one-dimensional images are treated, the problem is relatively simple, since the second dimension can be used solely for encoding and thus few limitations are posed on the apertures of the optical system. In this paper the design of two-dimensional apertures providing the necessary emphasis of the MTF components in all spatial directions is presented. A circular aperture for one optical system and an annulus one for the second is optimal. Criteria for the determination of the characteristics of these apertures are derived.

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N. Konforti and E. Marom "Low Frequency De-Emphasis Of The MTF. II Two-Dimensional Case.", Proc. SPIE 0422, 10th Intl Optical Computing Conf, (15 April 1983); https://doi.org/10.1117/12.936156

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KEYWORDS

Optical transfer functions

Ronchi rulings

Modulation transfer functions

Diffraction

Modulation

Imaging systems

Image processing

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