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