11 October 2012 Eliminating Dewar Narcissus artifacts induced by moving optics in infrared staring focal plane sensors
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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.
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Philip M. McCulloch, Philip M. McCulloch, Craig Olson, Craig Olson, Timothy D. Goodman, 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); doi: 10.1117/12.923545; https://doi.org/10.1117/12.923545
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