Method of reading pattern and optical signal reader
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United States of America Patent
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Oct 26, 1999
Grant Date -
N/A
app pub date -
Feb 7, 1997
filing date -
Feb 8, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of reading a pattern including steps of heating or irradiating with infrared light a substrate on which a transparent pattern is formed, the pattern containing a material capable of absorbing infrared light of specific wavelength such as polyacrylonitrile, and detecting infrared light which is radiated or reflected from the pattern.
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