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Proceedings Paper

Narcissus considerations in optical designs for infrared staring arrays
Author(s): Lawrence M. Scherr; Harold J. Orlando; James T. Hall; Thomas E. Godfrey
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Paper 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.

Paper Details

Date Published: 11 November 1996
PDF: 11 pages
Proc. SPIE 2864, Optical System Contamination V, and Stray Light and System Optimization, (11 November 1996); doi: 10.1117/12.258334
Show Author Affiliations
Lawrence M. Scherr, Northrop Grumman Corp. (United States)
Harold J. Orlando, Northrop Grumman Corp. (United States)
James T. Hall, Northrop Grumman Corp. (United States)
Thomas E. Godfrey, Northrop Grumman Corp. (United States)

Published in SPIE Proceedings Vol. 2864:
Optical System Contamination V, and Stray Light and System Optimization
Robert P. Breault; A. Peter M. Glassford; Stephen M. Pompea; Robert P. Breault; Stephen M. Pompea, Editor(s)

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