Waveguide-type image transmission device and fingerprint identification device
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United States of America Patent
Stats
-
Sep 5, 1995
Grant Date -
N/A
app pub date -
Feb 1, 1994
filing date -
Feb 1, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A card-shaped waveguide-type image transmission device has an image transmission base member piled up on a light illumination base member, and an optical system such as grating patterns and diffraction lens pattern for diffracting and focusing light beams are formed on the surfaces of the image transmission base member and the light illumination base member. The card-shaped waveguide-type image transmission device is integrated with an ID card, an IC card, an optical card or a ROM card as a fingerprint identification device.
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