Sensitivity of a coded-aperture telescope when used with a detector that under-samples the shadowgram

K. Byard; David Ramsden

doi:10.1117/12.161372

19 October 1993 Sensitivity of a coded-aperture telescope when used with a detector that under-samples the shadowgram

K. Byard, David Ramsden

Proceedings Volume 1948, Astroparticle Physics and Novel Gamma-Ray Telescopes; (1993) https://doi.org/10.1117/12.161372
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

The imaging properties of a gamma-ray telescope which employs a coded aperture in conjunction with a modular detection plane have been investigated. Gaps in the detection plane, which arise as a consequence of the design of the position sensitive detector used, produce artifacts in the deconvolved images. The effect is generally to reduce the signal to noise ratio for the detection of point sources. The application of an iterative image processing algorithm is shown to restore the image quality to that expected from an ideal detector.

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K. Byard and David Ramsden "Sensitivity of a coded-aperture telescope when used with a detector that under-samples the shadowgram", Proc. SPIE 1948, Astroparticle Physics and Novel Gamma-Ray Telescopes, (19 October 1993); https://doi.org/10.1117/12.161372

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KEYWORDS

Sensors

Signal to noise ratio

Image processing

Telescopes

Photomultipliers

Coded aperture imaging

Coded apertures

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