NCJ Number
19487
Date Published
1975
Length
30 pages
Annotation
THIS TECHNICAL DOCUMENT ESTABLISHES PERFORMANCE REQUIREMENTS AND TEST METHODS FOR PASSIVE, HAND-HELD NIGHT VISION DEVICES USED FOR LAW ENFORCEMENT.
Abstract
IT APPLIES TO FIRST GENERATION DEVICES WHICH EMPLOY THREE-STAGE ELECTROSTATICALLY FOCUSED IMAGE INTENSIFIER TUBES HAVING A MAXIMUM EFFECTIVE DIAMETER OF 25MM AND WHICH OPERATE AT NIGHT IN THE ABSENCE OF OPERATOR SUPPLIED ARTIFICIAL ILLUMINATION. THIS STANDARD WAS PREPARED BY THE LAW ENFORCEMENT STANDARDS LABORATORY OF THE NATIONAL INSTITUTE OF LAW ENFORCEMENT AND CRIMINAL JUSTICE AND IS INTENDED FOR USE AS AN AID IN THE SELECTION AND PROCUREMENT OF QUALITY EQUIPMENT. IT DESCRIBES TWO CLASSES OF DEVICES (CLASSIFIED ON THE BASIS OF OPTICAL GAIN) AND SPECIFIES REQUIREMENTS AND DETAILED TESTING METHODS FOR PERFORMANCE PARAMETERS SUCH AS: LIGHT EQUIVALENT BACKGROUND, LIGHT INDUCED BACKGROUND, OPTICAL GAIN, OPTICAL GAIN STABILITY, LUMINANCE UNIFORMITY, CATHODE AND SCREEN QUALITY, CONTRAST TRANSFER FUNCTION, DISTORTION AND FLARE, AS WELL AS THE ABILITY TO OPERATE UNDER ENVIRONMENTAL EXTREMES. APPENDIXES PROVIDE DESCRIPTIONS OF TEST EQUIPMENTS THAT ARE ACCEPTED FOR USE IN CONDUCTING CERTAIN TESTS. (SNI ABSTRACT)