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Proceedings Paper

Thermal comparison of emissive infrared projector devices
Author(s): Owen M. Williams; Geoffrey K. Reeves
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Paper Abstract

The three emissive technologies--thin film resistor, silicon bridge resistor and suspended membrane resistor--currently being investigated for dynamic infrared projection applications are thermally compared and contrasted. It is shown that the technologies may be compared quantitatively in terms of both the strong power/speed trade-off that exists and the maximum effective blackbody temperature capability. The suspended membrane technology is shown to be superior in thermal terms, followed by the thin films technology which is found to be practical for high speed small array applications, or for large array applications provided that only small levels of effective blackbody temperature are required. In comparison, it is found that the capability of the silicon bridge technology is constrained in thermal terms both by the comparatively high thermal conductivity of silicon and by the small values of fill factor inherent to the technology.

Paper Details

Date Published: 13 August 1993
PDF: 13 pages
Proc. SPIE 1967, Characterization, Propagation, and Simulation of Sources and Backgrounds III, (13 August 1993); doi: 10.1117/12.151032
Show Author Affiliations
Owen M. Williams, Defence Science and Technology Organisation (Australia)
Geoffrey K. Reeves, Royal Melbourne Institute of Technology (Australia)

Published in SPIE Proceedings Vol. 1967:
Characterization, Propagation, and Simulation of Sources and Backgrounds III
Wendell R. Watkins; Dieter Clement, Editor(s)

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