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NCJRS Abstract

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NCJ Number: 150464 Find in a Library
Title: Night Moves
Journal: Police: The Law Enforcement Magazine  Volume:18  Issue:4  Dated:(April 1994)  Pages:46-48,50,55,97
Author(s): R Huntington
Date Published: 1994
Page Count: 6
Type: Training (Aid/Material)
Format: Article
Language: English
Country: United States of America
Annotation: This article describes the technology and history of night vision equipment and assesses the characteristics of various Russian-made night-vision devices.
Abstract: The enhancement of images using existing light requires a number of conditions. Light images, composed of photons are visible to the human eye but must be converted into electrons before they can be intensified. This conversion is achieved by passing the photons through a thin glass plate covered with a chemical film that converts the photons into electrons. The electrons are then channeled into a vacuumed image converter tube and electrically or magnetically accelerated. Inside the tube, the electrons bounce off the chemically treated walls, creating an increasing number of like electrons. These amplified electrons then pass over a phosphor screen that converts the electrons back into photons, which is the image a person sees in the eyepiece. After describing this technology, the article describes the various generations of night vision devices that reflect technology advances. This is followed by profiles and assessments of the following Russian-made night-vision devices: MPN 1000-I, MPN 1500, MPN 30 K, MPN 90K, and the MPN 60K.
Main Term(s): Police equipment
Index Term(s): Night vision devices; Science and Technology; Specifications
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