Uneven-surface data detection apparatus
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United States of America Patent
Stats
-
Mar 1, 1988
Grant Date -
N/A
app pub date -
Feb 27, 1986
filing date -
Mar 3, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An uneven-surface data detection apparatus, includes a transparent plate having an uneven-surface contact portion against which an uneven surface to be detected is pressed. A light source illuminates the uneven-surface contact portion through the transparent plate. An uneven-surface image drawing out optical element draws out the light reflected on the uneven-surface contact portion of the transparent plate. A detector detects the light drawn out from the transparent plate by the optical element. Light reflected by a projection-facing portion of the uneven surface contact portion to be introduced into the detector diverges from a propagation direction of light reflected by a recess-facing portion of the uneven surface contact portion. The optical element is arranged to guide the light reflected by the projection-facing portion into the detector.
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