Registers – Coded record sensors – Particular sensor structure
Patent
1992-02-28
1994-03-22
Willis, Davis L.
Registers
Coded record sensors
Particular sensor structure
359 17, 359205, 359212, H01S 310
Patent
active
052966895
ABSTRACT:
An optical scanning system including an aiming system which is particularly suitable for handheld scanners where the outgoing light is scanned over a desired angle in a scan plane. The aiming system includes a light source generating an optical beam along an outgoing optical path toward an object to be scanned; a detector for detecting light reflected off the object; an oscillating scan mirror in the outgoing optical path directing light toward the object along a scan plane; and a diffractive optical module positioned in the outgoing optical path adjacent the scan mirror, the diffractive optical module having a pair of diffractive optical elements separated by an aperture, the diffractive optical elements positioned on either side of an aperture along the scan plane, each diffractive optical element de-scanning the portion of the optical beam passing therethrough to form an aiming light beam.
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Durant Thomas L.
Reddersen Brad R.
Lin Yu S.
Spectra-Physics Scanning Systems, Inc.
Willis Davis L.
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