Optically addressed thermal imaging device
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United States of America Patent
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Apr 26, 1994
Grant Date -
N/A
app pub date -
Oct 11, 1990
filing date -
Oct 21, 1989
priority date (Note) -
Expired
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Abstract
A thermal imaging device includes detector pixels A, B, C provided by a pyroelectric layer 1 arranged between electrode structures 3 and 4. A photoconductive layer 7 is provided between the electrode structure 5 and a further electrode structure 9. The device also includes an illumination source 11 for illuminating the photoconductive layer 7 for enabling pyroelectric charge developed by the detector pixels A, B, C to be optically addressed via the electrode structure 9. Optical addressing of the detector pixels obviates the need for solid state switching connections to each pixel, providing an imaging device readily capable of large scale fabrication.
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