Three Dimensional Pattern Display

Abstract

A three-dimensional pattern display apparatus has been developed using a 5 inch X-Y oscilloscope as the displayer. The main point of the development consists of a new type of digital to analog converter in which reading of spot positions of extremely high precision is possible. The new digital-analog converter is specified by the following points: the maximum output is 10 volts, the zero level drift is within 10μV, the linearity is better than 0.1%, the response speed is faster than 1μ second after signal injection. The precise spot readers make this apparatus very convenient, being able to read X and Z coordinates of any designated spot in a pattern. This article shows a method to realize technically such display apparatus.