Accession Number : ADD013016
Title : A TV Surveillance System That Requires No Mechanical Motion.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Phillips,William R
Report Date : 12 Jun 1987
Pagination or Media Count : 10
Abstract : This invention provides a purely electronic means of providing the surveillance using a mechanical pan and tilt mechanism. The invention requires no mechanical motion, has no moving parts and eliminates the need of cumbersome mounting devices and bulky electric motors required to house and drive the pan and tilt mechanism. The method involves utilizing a television camera of the same type used with the pan and tilt device but requires a modification of the camera vertical and horizontal deflection coil drive circuitry. This modification involves reduction of the electron beam scanning raster on the vidicon photo conductive surface (underscanning). In addition, the modification allows movement of the reduced size raster to different locations on the photo conductive surface. This ability to relocate the raster anywhere on the surface allows the line of sight (LOS) of the camera to be changed. This change in the LOS emulates the same LOS the camera would undergo when it is planned and tilted by the mechanical pan and tilt mechanism.
Descriptors : *PATENT APPLICATIONS, *RASTERS, *TELEVISION CAMERAS, *SCANNING, *PHOTOCONDUCTORS, *REDUCTION, *VIDICONS, ELECTRIC MOTORS, LINE OF SIGHT, MECHANICAL PROPERTIES, MECHANICAL COMPONENTS, TILT, ELECTRON BEAMS, MOTION, MOUNTS, SURFACES, SIZES(DIMENSIONS)
Subject Categories : Non-radio Communications
Distribution Statement : APPROVED FOR PUBLIC RELEASE