Narcissus considerations in optical designs for infrared staring arrays

Lawrence M. Scherr; Harold J. Orlando; James T. Hall; Thomas E. Godfrey

doi:10.1117/12.258334

11 November 1996 Narcissus considerations in optical designs for infrared staring arrays

Lawrence M. Scherr, Harold J. Orlando, James T. Hall, Thomas E. Godfrey

Proceedings Volume 2864, Optical System Contamination V, and Stray Light and System Optimization; (1996) https://doi.org/10.1117/12.258334
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Narcissus is a stray light problem for infrared imaging sensors. Control of narcissus is a requirement for designing scanning sensors and narcissus analysis tools are available in some optical raytrace programs. These tools have not been optimized for staring sensors. Narcissus is assumed to be unimportant in staring array designs because the shading effects can be removed by offset correction of the detector array data. This would be sufficient for sensors which meet the following conditions: (1) calibrated at the entrance aperture, (2) operate at a constant optical housing temperature, (3) no movement of lenses for focus or change in field of view. Narcissus may be noticeable for sensors not meeting these conditions. We have developed procedures for applying existing narcissus analysis tools to staring sensors. A staring array prototype FLIR has been analyzed. Laboratory tests have confirmed the narcissus analysis.

Citation Download Citation

Lawrence M. Scherr, Harold J. Orlando, James T. Hall, and Thomas E. Godfrey "Narcissus considerations in optical designs for infrared staring arrays", Proc. SPIE 2864, Optical System Contamination V, and Stray Light and System Optimization, (11 November 1996); https://doi.org/10.1117/12.258334

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