Registers – Coded record sensors – Particular sensor structure
Patent
1992-12-15
1993-08-17
LaRoche, Eugene R.
Registers
Coded record sensors
Particular sensor structure
235467, 359 18, G06K 710, G02B 532, G02B 2610, G02B 2744
Patent
active
052371603
ABSTRACT:
A bar code scanner includes a semiconductor laser device for emitting a light beam, a hologram disc on which a grating is formed, the hologram disc rotating around a predetermined axis, an incident optical system provided for perpendicularly projecting the light beam emitted from the light source onto the grating formed on the hologram member, a first optical system which projects the light beam passing through the grating formed on the hologram member onto the medium, and a second optical system for guiding the light beam reflected by the medium to a detector. The first optical system includes a plurality of mirrors arranged under the hologram disc so as to surround the axis of rotation of the disc so that each of the mirrors reflects light diffracted by the hologram disc and thereby forms a scanning line.
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Kesssell Michael C.
LaRoche Eugene R.
Ricoh & Company, Ltd.
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