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Proceedings Paper

The Modulation Transfer Function Of Focal Plane Array Systems
Author(s): D J Bradley; C J Baddiley; P N J Dennis
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Paper Abstract

Focal Plane Arrays (FPA) of Cd Hg Te Detectors with responses in the 3-5 4μm or 8-14 4μm bands have been successfully incorporated into Infrared Imagers. Using a variety of digital signal processing techniques, good imagery has been obtained but the image quality is limited by sampling effects at the focal plane which cause non-isoplanatism and aliasing. Some initial modelling of these sampling effects and the way in which they affect the Modulation Transfer Function (MTF) have previously been reported(5). In this paper that modelling is extended to investigate, more fully, the non-isoplanatic nature of the system and in addition some MTF measurements are reported and compared with the results obtained from simulation. Some alternative methods of MTF measurement are being investigated and will be discussed.

Paper Details

Date Published: 10 September 1987
PDF: 9 pages
Proc. SPIE 0807, Passive Infrared Systems and Technology, (10 September 1987); doi: 10.1117/12.941434
Show Author Affiliations
D J Bradley, Royal Signals and Radar Establishment (United Kingdom)
C J Baddiley, Royal Signals and Radar Establishment (United Kingdom)
P N J Dennis, Royal Signals and Radar Establishment (United Kingdom)


Published in SPIE Proceedings Vol. 0807:
Passive Infrared Systems and Technology
H. M. Lamberton, Editor(s)

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