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Proceedings Paper

Using a rotating test pattern for MTF measurement of staring array sensors
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Paper Abstract

This paper describes the use of a rotating test pattern or reticle to measure the Modulation Transfer Function (MTF) of a staring array sensor. The method finds the Edge Spread Function (ESF) from which the MTF can be calculated. The rotating reticle method of finding the ESF of a sensor has several advantages over the static tilted edge method. The need for precise edge alignment is removed. Motion blur is used to simultaneously average out the effect of undersampling and to oversample the edge. The improved oversampling allows reduction of the noise in the generated ESF while keeping a high resolution. A unique data readout technique reads edge data perpendicular to the edge. Perpendicular readout eliminates the need to know or estimate the slope of the tilted edge. This MTF measurement method is validated using simulation and actual data captured by a digital camera. The resulting ESF plots agree well with expected results.

Paper Details

Date Published: 5 August 2004
PDF: 10 pages
Proc. SPIE 5407, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XV, (5 August 2004); doi: 10.1117/12.577626
Show Author Affiliations
Jonathan D. Fanning, Univ. of Memphis (United States)
Srikant K. Chari, Univ. of Memphis (United States)
Carl E. Halford, Univ. of Memphis (United States)

Published in SPIE Proceedings Vol. 5407:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XV
Gerald C. Holst, Editor(s)

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