TV surveillance system that requires no mechanical motion

• US 4,740,839 A
• Filed: 06/12/1987
• Issued: 04/26/1988
• Est. Priority Date: 06/12/1987
• Status: Expired due to Fees

• Current Assignee: William R. Phillips
• Original Assignee: William R. Phillips
• Inventors: Phillips, William R.
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US07/060,873
• Time in Patent Office: 319 Days
• Field of Search: 358/108, 358/180, 358/209, 358/217
• US Class Current: 348/156
• CPC Class Codes: G08B 13/19626 optical details, e.g. lenses, mirrors or multiple lenses
• CPC Class Codes: G08B 13/19636 pertaining to the camera
• CPC Class Codes: H04N 23/40 Circuit details for pick-up tubes
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

This invention provides a method of providing TV surveillance without the need for cumbersome pan and tilt mechanisms. The method involves underscanning a conventional TV camera and dynamically moving the resultant reduced size raster over the photo conductive surface. Movement of the raster over the photo conductive surface emulates the vertical and horizontal movement provided by the pan and tilt mechanism.

Claims

1. A surveillance system comprising a TV camera located fixly such that a scene having a plurality of area will be reviewed, said camera having a vidicon photo conductive surface, circuit means connected to said camera such that the vertical and horizontal deflection coil drive circuitry can be changed such that a reduction of the electron beam scanning raster on the vidicon photo conductive surface will be obtained so as to underscan the scene, controlling the circuit means such that the scene can be scanned area by area even though the camera is located fixly, a monitor connected to said camera for viewing the areas scanned by the camera, and control means connected to the circuitry whereby a specific area of a specific size can be scanned and reviewed by said monitor.