Optical card with printing visible below the optical recording
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Mar 10, 1993
filing date -
Mar 10, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical card having visible data marked on a base layer and a substantially transparent optical data recording layer formed over the base layer. A protective layer is laminated over the optical data recording layer. The visible data marked on the base may be marked in an ink visible only at a nonvisual wavelength, such as infrared. A reader scans the visible data marked on the base layer, since the optical recording layer covering the base layer is substantially transparent.
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