Registers – Coded record sensors – Particular sensor structure
Patent
1987-06-18
1989-08-29
Pitts, Harold I.
Registers
Coded record sensors
Particular sensor structure
235470, G06K 710
Patent
active
048619736
ABSTRACT:
An optical arrangement in a laser scanner for generating a cross bar X laser light beam scan pattern includes a multi-faceted or -mirrored optical device mounted for rotation about a vertical axis. The device has four primary mirrors oriented ninety degrees from one to the next about the vertical axis. The primary mirrors are tilted about respective horizontal axes relative to the vertical axis and adapted to receive and reflect a laser light beam as each primary mirror moves successively through a portion of each rotational cycle of the optical device. The optical arrangement also includes a multiplicity of secondary mirrors disposed in stationary positions relative to one another and to each of the primary mirrors as they move successively through the rotational cycle portion. The secondary mirrors are adapted to receive the laser light beam reflected from the primary mirrors and to reflect the same to trace scan lines of the laser light beam scan pattern at different orientations with respect to one another as the primary mirrors move successively through the portion of each rotational cycle.
REFERENCES:
patent: 4713532 (1987-12-01), Knowles
Acosta Jorge L.
Campbell John S.
Hellekson Ronald A.
Pitts Harold I.
Spectra-Physics Inc.
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