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

Philip M. McCulloch; Craig Olson; Timothy D. Goodman

doi:10.1117/12.923545

11 October 2012 Eliminating Dewar Narcissus artifacts induced by moving optics in infrared staring focal plane sensors

Philip M. McCulloch, Craig Olson, Timothy D. Goodman

Proceedings Volume 8486, Current Developments in Lens Design and Optical Engineering XIII; 848606 (2012) https://doi.org/10.1117/12.923545
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

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.

Citation Download Citation

Philip M. McCulloch, Craig Olson, and Timothy D. Goodman "Eliminating Dewar Narcissus artifacts induced by moving optics in infrared staring focal plane sensors", Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 848606 (11 October 2012); https://doi.org/10.1117/12.923545

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