A Device of Automatic Plotter

Abstract

n automatic plotter has been developed. With this device, a number of spots on the cathode-ray tubes can be plotted rapidly, automatically and accurately. This device can be utilized as an. X-Y recorder as well as an indicator of intensity or density distribution in the field of optics or statistics. And also, if the viewing storage tube is used as an indicator, this device may be used. as the light source of the image synthesizer in the field of optics.
This device consists of three parts: a D-A converter, a photo-reader and a cathode ray oscillo-scope or memoriscope. The D-A converter is of all-transistor circuit.
The input data of this device are those that are punched out on paper tape with binary cord directly obtained through the electronic computer.
The speed for treating the data is about 60_??_80 msec per one point. The accuracy of this device is better than ±0.5% of full scale; it is enough for practical use with satisfactory linearity and reproducibity.