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Proceedings Paper

Generating Low Light Levels For Night Vision Device Evaluation
Author(s): Harold P. Field
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Paper Abstract

A basic problem in testing and evaluating night vision devices is the establishment of a low level scene whose radiation characteristics are accurately known and readily reproducible. In regard to the scene being readily reproducible, there is a twofold requirement: (1) that it be reproducible over extended periods of time, i. e. , from one month or year to the next, and (2) that it be readily reproduced in different geographic locations, so that the conditions of evaluation of the device may be duplicated by different organizations, such as the manufacturer and the end user. Requirements for such a scene include the following: the scene should include elements allowing the resolution, the linearity (gray scale), flare, and overload characteristics to be judged; the spectral radiance of various portions of the scene must be accurately known; the radiance levels in the scene should be adjustable so that the device or system under test may be evaluated both at its ultimate sensitivity, where the input noise of the system begins to deteriorate the scene, and at higher levels where the input noise is negligible and other performance characteristics of the system, such as maximum resolution and gray scale linearity, can be evaluated.

Paper Details

Date Published: 20 February 1973
PDF: 6 pages
Proc. SPIE 0033, Solving Problems in Security, Surveillance and Law Enforcement with Optical Instrumentation, (20 February 1973); doi: 10.1117/12.953631
Show Author Affiliations
Harold P. Field, Gamma Scientific, Incorporated (United States)

Published in SPIE Proceedings Vol. 0033:
Solving Problems in Security, Surveillance and Law Enforcement with Optical Instrumentation
Lucien Biberman; Frederick A. Rosell, Editor(s)

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