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Proceedings Paper

Background Suppression With Variable Modulation Transfer Function (MTF) Imaging Systems
Author(s): Theodore Zehnpfennig; Saul Rappaport; Richard Wattson
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Paper Abstract

A technique is described for suppressing the lower spatial frequencies in the object using an optical system with a time-varying MTF. The technique is applicable to imaging radiometers operating in the infrared region. The required variations in the MTF are produced by causing the image to move in a programmed sequence of small amplitude circular gyrations on the face of the detector. The gyrations are performed at a frequency high compared to the system frame rate. A series of calculations are described which indicate that, at low spatial frequencies, average suppression ratios of at least 500 to 1 can be achieved with this technique.

Paper Details

Date Published: 17 December 1980
PDF: 7 pages
Proc. SPIE 0253, Modern Utilization of Infrared Technology VI, (17 December 1980); doi: 10.1117/12.959494
Show Author Affiliations
Theodore Zehnpfennig, Visidyne, Incorporated (United States)
Saul Rappaport, Visidyne, Incorporated (United States)
Richard Wattson, Visidyne, Incorporated (United States)

Published in SPIE Proceedings Vol. 0253:
Modern Utilization of Infrared Technology VI
Irving J. Spiro, Editor(s)

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