A system perspective on designing for field-dependent SNR in wide-angle point-source detection lenses

S. Craig Olson; Andrew W. Sparks; Robert A. Cline; Timothy D. Goodman

doi:10.1117/12.2262684

11 May 2017 A system perspective on designing for field-dependent SNR in wide-angle point-source detection lenses

S. Craig Olson; Andrew W. Sparks; Robert A. Cline; Timothy D. Goodman

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Proceedings Volume 10181, Advanced Optics for Defense Applications: UV through LWIR II; 101810G (2017) https://doi.org/10.1117/12.2262684
Event: SPIE Defense + Security, 2017, Anaheim, California, United States

Abstract

Lenses for staring-array point-source detection sensors must maintain good signal-to-noise ratio (SNR) over fields of view often exceeding 100 degrees. Such lenses typically have f-θ distortion to provide constant solid angle sampling in object space. While the relative illumination calculation is often used to describe flux transfer from a Lambertian extended object for imaging applications, maximizing SNR for point-source detection depends primarily on maximizing collected irradiance at the entrance pupil, the shape of which can vary dramatically over field. We illustrate this field-dependent SNR calculation with an example lens and outline the calculations needed to derive a simple aberration-based expression for the field dependence of point-source SNR.

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S. Craig Olson, S. Craig Olson, Andrew W. Sparks, Andrew W. Sparks, Robert A. Cline, Robert A. Cline, Timothy D. Goodman, Timothy D. Goodman, } "A system perspective on designing for field-dependent SNR in wide-angle point-source detection lenses", Proc. SPIE 10181, Advanced Optics for Defense Applications: UV through LWIR II, 101810G (11 May 2017); doi: 10.1117/12.2262684; https://doi.org/10.1117/12.2262684

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