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Proceedings Paper

Ring around the image, a pocket full of problems
Author(s): Troy A. Palmer
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Paper Abstract

This paper will explore an unwanted side effect of shortwave or near infrared optimized lens assemblies operating in low light conditions. Particular attention will be paid to those designs encountering a bright source in an otherwise low light scene; i.e. those with large dynamic ranges. The impact of bright features in very low levels can produce degrading artifacts or noise and greatly hinder image quality. The aforementioned effects will be demonstrated for both the SWIR optimized lenses and their visible light counterparts. The artifacts of traditional optical and mechanical geometries and their inherent problems will also be covered as well as how one might lessen their impact on image degradation and thereby improve system sensitivity.

Paper Details

Date Published: 7 May 2009
PDF: 6 pages
Proc. SPIE 7298, Infrared Technology and Applications XXXV, 729811 (7 May 2009); doi: 10.1117/12.819166
Show Author Affiliations
Troy A. Palmer, StingRay Optics, LLC (United States)

Published in SPIE Proceedings Vol. 7298:
Infrared Technology and Applications XXXV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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