Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1997-01-02
1998-09-22
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250557, 25055944, 209584, 209900, G01N 904, B07C 500
Patent
active
058117920
ABSTRACT:
The contents of sealed envelopes are accessed using radiation to differentially heat information patterns within the contents and conduction to transfer corresponding thermal patterns to the envelopes' outer surfaces. The radiation is preferably within the wavelengths of microwaves or radio waves for penetrating the envelopes. The information pattern differentially absorbs the radiation by converting the attendant radiant energy into heat by either induction heating or dielectric heating. An infrared camera or other thermally sensitive device converts the thermal patterns conducted to the envelopes' outer surfaces into corresponding electrical patterns for further processing.
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Mitchell, Jr. Chauncey T.
Verschuur Gerrit L.
Allen Stephone B.
Wisconsin Label Corporation
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