1 August 1973 Light Pen for Storage Oscilloscopes
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Abstract
A very inexpensive electronic circuit has been developed for addressing points of interest directly on the bistable screen of storage oscilloscopes by means of an external photodetector operated like a pen. A square marker with internal black cross is displayed on the screen at an intensity level high enough for a good direct view by the operator and low enough for avoiding unwanted spot writing. The marker can be displaced at will on the screen by the operator pen, while at the output of the pen circuit the coordinates of the marker are available in analogic form in order to be used as address signals by a computer.
P. Mancini, P. Mancini, F. Granelli, F. Granelli, } "Light Pen for Storage Oscilloscopes," Optical Engineering 12(4), 124139 (1 August 1973). https://doi.org/10.1117/12.7971648 . Submission:
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