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SURVEILLANCE EQUIPMENT - ITS FUNCTIONS AND USES

NCJ Number
18664
Journal
Security World Volume: 12 Issue: 2 Dated: (FEBRUARY 1975) Pages: 15-16,43,67
Author(s)
ANON
Date Published
1975
Length
4 pages
Annotation
THE SURVEILLANCE EQUIPMENT THAT IS DESCRIBED INCLUDES LOW LIGHT LEVEL AND INFRA-RED NIGHT VIEWING DEVICES AND CCTV'S (CLOSED CIRCUIT TELEVISIONS).
Abstract
THE DIFFERENCE BETWEEN ACTIVE AND PASSIVE NIGHT VISION DEVICES IS EXPLAINED AS SIMPLY BEING THE DIFFERENCE BETWEEN LOW-LIGHT LEVEL AND INFRA-RED DEVICES - ONE AMPLIFIES EXISTING LIGHT WHILE THE OTHER SHEDS NEW LIGHT ON THE SUBJECT.

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