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23 April 2010 Effective and apparent temperature calculations and performance analysis of mid-wave infrared light emitting diodes for use in infrared scene projection
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Abstract
Recent advancements in gallium antimonide light emitting diode (LED) arrays have opened the way for the development of LED-based infrared scene projectors. Infrared LED array technology offers the opportunity for high frame rates, broad dynamic range, and high apparent temperatures. Since LEDs are narrow-band devices, relative to blackbody emitters, performance of an LED-based infrared scene projector is highly dependent on how effective and apparent temperatures are calculated in a detector system being tested. Because of this dependence, methods used to compute effective and apparent temperatures are reviewed and applied to published radiometric data from a gallium antimonide LED array. These calculations are used to investigate the effects of detector spectral response, emitter array fill factor, emitter radiant flux distribution, and detector aperture size on the apparent temperature of the LED array. This investigation leads into an analysis of the potential performance advantages and technical challenges of an LED-based infrared scene projector system.
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Eric M. Golden and Ronald J. Rapp "Effective and apparent temperature calculations and performance analysis of mid-wave infrared light emitting diodes for use in infrared scene projection", Proc. SPIE 7663, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing XV, 766304 (23 April 2010); doi: 10.1117/12.849754; https://doi.org/10.1117/12.849754
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