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Proceedings Paper

Eliminating Dewar Narcissus artifacts induced by moving optics in infrared staring focal plane sensors
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Paper Abstract

Staring infrared imagers have multiple surfaces within the integrated Dewar assembly which contribute to non-traditional Narcissus artifacts. Static non-uniformity correction is insufficient to remove dynamic Narcissus artifacts caused by moving focus or zoom groups. Dynamic Narcissus artifacts often manifest as rings apparent to the human eye, although they may lie near the noise floor of the imager. Moreover, strong field curvature of the Narcissus can complicate diagnosis using paraxial methods. We compare a simple pupil ghost metric to traditional Narcissus metrics and present an experimental case study illustrating how the metric can be used during optimization to eliminate the effect.

Paper Details

Date Published: 11 October 2012
PDF: 8 pages
Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 848606 (11 October 2012); doi: 10.1117/12.923545
Show Author Affiliations
Philip M. McCulloch, L-3 Communications Sonoma EO (United States)
Craig Olson, L-3 Communications Sonoma EO (United States)
Timothy D. Goodman, L-3 Communications Sonoma EO (United States)


Published in SPIE Proceedings Vol. 8486:
Current Developments in Lens Design and Optical Engineering XIII
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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