05296689 is referenced by 219 patents and cites 18 patents.

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.

Title
Aiming beam system for optical data reading device
Application Number
7/843473
Publication Number
5296689
Application Date
February 28, 1992
Publication Date
March 22, 1994
Inventor
Thomas L Durant
Eugene
OR, US
Brad R Reddersen
Eugene
OR, US
Agent
Lyon & Lyon
Assignee
Spectra Physics Scanning Systems
OR, US
IPC
H01S 3/10
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