Device with an alteration means for the conversion of an image
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Apr 6, 1999
filing date -
Apr 7, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To reduce phenomena of distortion in an image intensifier tube, it is planned to provide its input with a permanent test pattern. The image of the test pattern is then read in real time and a deduction is made therefrom of the correction to be made to an image transmitted and converted by this intensifier tube. To create a permanent test pattern, references are made on the intensifier tube, on its input window. As a variant, the references are produced by an auxiliary laser source that illuminates the cathode of the tube by the rear.
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