Low speed laser scanning apparatus

Details Low speed laser scanning apparatus Low speed laser scanning apparatus

G - Physics

02

B

88/96.8

G02B 27/00 (2006.01) G06K 7/10 (2006.01)

Patent

CA 1224651

-16- LOW SPEED LASER SCANNING APPARATUS Abstract of the Disclosure Apparatus for generating a scanning pattern for the omni-directional reading of bar code indicia. In one embodiment, a rotating mirror assembly is imaged onto itself by a lens and mirror combination which introduces a light displacement of the image resulting in the displacement of the input beam from the angle of incidence on the mirror of the input beam. Using an array of such lenses and mirrors, a plurality of spa- tially displaced light beams of substantially equal power are generated without the use of specialized beam- splitting coatings for use in the generation of a scan pattern. In a second embodiment, the array of mirrors deflects a laser beam two or more times at the same facet of a rotating mirror assembly to increase the angular velocity of the deflected beams, thereby enab- ling the mirror assembly to be rotated at a lower speed while still maintaining the required angular velocity of the deflected output beam.

431162

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