Fingerprint image input apparatus including a cylindrical lens
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United States of America Patent
Stats
-
Sep 8, 1992
Grant Date -
N/A
app pub date -
Sep 21, 1990
filing date -
Feb 22, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fingerprint image input apparatus for optically detecting ridges of a skin surface of a finger and inputting a detected signal to various control units, includes a transparent member having a lower surface and an upper surface on which the finger subjected to fingerprint detection is pressed, a light source for emitting light from said lower surface to said upper surface of said transparent member, a photosensor for detecting light reflected or scattered from said upper surface of said transparent member, and means, inserted midway along an optical path from said light source to said photosensor, for linearly (in a predetermined direction) focusing light incident on said photosensor, wherein the fingerprint input apparatus further includes another transparent member formed so that the upper surface of the transparent member on which the finger is pressed serves as a light scattering plane with respect to a wavelength of the light.
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