DISPLAY OF INFORMATION FROM SCANNED MEASURING SYSTEMS BY CONTOUR MAPPING

A circuit is described that has been used to code the outputs from scanning measuring equipment prior to display on a cathode-ray tube. The circuit may be regarded as a type of delta modulator and provides (i) a ternary level contour display, (ii) a quantized intensity modulated display and (iii) a type of contour display in which the detail between the contours is shown by intensity modulation. Displays of potential distributions observed with a scanned electron beam potential probe are presented to illustrate the advantages of displays produced from the circuit.