Generating Low Light Levels For Night Vision Device Evaluation

Harold P. Field

doi:10.1117/12.953631

20 February 1973 Generating Low Light Levels For Night Vision Device Evaluation

Harold P. Field

Proceedings Volume 0033, Solving Problems in Security, Surveillance and Law Enforcement with Optical Instrumentation; (1973) https://doi.org/10.1117/12.953631
Event: Solving Problems in Security Surveillance and Law Enforcement with Optical Instrumentation, 1972, New York City, United States

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.

Citation Download Citation

Harold P. Field "Generating Low Light Levels For Night Vision Device Evaluation", Proc. SPIE 0033, Solving Problems in Security, Surveillance and Law Enforcement with Optical Instrumentation, (20 February 1973); https://doi.org/10.1117/12.953631

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KEYWORDS

Lamps

Night vision

Calibration

Reflectivity

Tungsten

Optical filters

Signal attenuation

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