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A Method to Prevent Image Orthicon Burn-In

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1 Author(s)
Wilner, John T. ; Director of Engineering, WBAL, WISN, Baltimore, Maryland

A device will be described which reduces ``burn-in'' on an image orthicon tube by as much as 90 per cent. The device is relatively simple and consists of a mechanism to oscillate slowly the lens board of a television camera at a very slow rate. Electrical cancellation of the resulting horizontal motion is accomplished by simple modification to the horizontal centering circuit of the camera. This device should allow a television station to get much longer life out of certain I. O. tubes and, just as important, to eliminate objectionable burn-in to the television viewer.

Published in:

Broadcast Transmission Systems, IRE Transactions on  (Volume:PGBTS-7 ,  Issue: 1 )