Method and apparatus for accessing contents of envelopes and other similarly concealed information
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Jan 2, 1997
filing date -
Jan 2, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
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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