Information reading device
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United States of America Patent
Stats
-
Nov 12, 1991
Grant Date -
N/A
app pub date -
Dec 5, 1989
filing date -
Dec 9, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An information reading device which comprises a semiconductor laser source which emits a semiconductor laser beam and a first condenser lens for converging the laser beam to form an irradiation beam. A beam shaping optical system is disposed on the optical path of the laser beam to form a predetermined beam section shape of the irradiation beam which is converged by the first condenser lens. A hologram disk is used for deflecting the irradiation beam. The information reading device further comprises an optical path separation system. The optical path of the irradiation beam is separated from that of the reflection beam reflected from the scanning surface irradiated by the irradiation beam. A second condenser lens is arranged from converging the reflection beam separated from the irradiation beam by the optical path separation means. And an optical sensor is arranged for detecting the reflection beam converged by the second condenser lens.
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