The Modulation Transfer Function Of Focal Plane Array Systems

D J Bradley; C J Baddiley; P N J Dennis

doi:10.1117/12.941434

10 September 1987 The Modulation Transfer Function Of Focal Plane Array Systems

D J Bradley, C J Baddiley, P N J Dennis

Proceedings Volume 0807, Passive Infrared Systems and Technology; (1987) https://doi.org/10.1117/12.941434
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands

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.

Citation Download Citation

D J Bradley, C J Baddiley, and P N J Dennis "The Modulation Transfer Function Of Focal Plane Array Systems", Proc. SPIE 0807, Passive Infrared Systems and Technology, (10 September 1987); https://doi.org/10.1117/12.941434

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