Accession Number : ADD000258

Title :   Wedge Shaped Raster Generation.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Cowan,John G

Report Date : 16 Apr 1974

Pagination or Media Count : 8

Abstract : The patent describes circuitry for generating a pie wedge shaped CRT raster characterized by curved lines, each having the same center of curvature, whereby the range scale is uniform throughout the raster when used as a sonar display. The disclosed circuitry produces a modulated sawtooth deflection signal and a clipped and modulated hyperbolic voltage waveform, the effect of which is added to that of the normal range deflection voltage ramp to produce the desired raster.

Descriptors :   *Rasters, *Patents, Cathode ray tubes, Sweep generators, Scanning, Sonar, Display systems

Subject Categories : Electrooptical and Optoelectronic Devices
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE