G - Physics – 06 – K
Patent
G - Physics
06
K
352/53.72
G06K 7/10 (2006.01) G06K 9/20 (2006.01)
Patent
CA 1325061
ABSTRACT The present invention relates to a laser scanning module. The module is comprised of an optical assembly having a center of mass. The assembly includes a laser diode for emitting a laser beam with concomitant generation of heat, a heat sink for conduction the heat away from the diode and an optic unit for optically forming and modifying the laser beam to have a predetermined beam cross-section at a reference plane in the vicinity of indicia are located and impinged by the laser beam. The beam is reflected off the indicia and a portion travels away from the indicia back toward the module. A sensor is provided for detecting the returning portion of the reflected laser light, and for generating an electrical signal indicative of the indicia being read. A scanning assembly having a center of mass is provided and includes a reciprocally oscillatable scanning motor having a drive shaft on which a mirror is mounted for joint repetitive and cyclical oscillating movement a plurality of times a second. The mirror directs the laser beam toward the reference plane and to and across the indicia to be read for scanning the same. The mirror also collects the returning portion of the reflected laser light and directs it to the sensor. A printed circuit board extends between the assemblies for maintaining the assemblies in optical alignment. A unit is provided for shock mounting the assemblies which includes a first pair of shock mounts on the board and aligned along a first axis which extends generally through the center of the mass of the scanning assembly. The unit further includes a second pair of shock mounts on the board and aligned along a second axis which extends generally through the center of mass of the optical assembly.
611468
Gofman Yuri
Krichever Mark
Shepard Howard M.
Gofman Yuri
Kirby Eades Gale Baker
Krichever Mark
Shepard Howard M.
Symbol Technologies Inc.
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