Thermal Image Projector/Recorder

C. M. Redman

doi:10.1117/12.953934

1 September 1974 Thermal Image Projector/Recorder

C. M. Redman

Proceedings Volume 0044, Instrumentation in Astronomy II; (1974) https://doi.org/10.1117/12.953934
Event: Instrumentation in Astronomy, 1974, Tucson, United States

Abstract

The Thermal Image Projector/Recorder (TIPR) is a system of electro-optical devices which convert low-level thermal images to corresponding high-intensity light images for projection on a screen or recording on film. The performance of typical thermal systems is limited for two primary reasons: first, there is spectral incompatibility in that the energy in a thermal photon is too low to directly expose film or release electrons from imaging cathodes; second, the integration of a thermal image over a period of time only tends to smear the image because of the low thermal impedance of thermal-sensitive materials. The TIPR solves the elemental dwell time as does the pyroelectric vidicon by essentially providing an unlimited number of detectors. It solves the image smear problem by rapid chopping of the thermal image radiometrically and the integration of the chopped images. The theory of the TIPR is based on the release of electron images from thermal-sensitive materials through electron field emission from millions of points.

Citation Download Citation

C. M. Redman "Thermal Image Projector/Recorder", Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); https://doi.org/10.1117/12.953934

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