G - Physics – 11 – B
Patent
G - Physics
11
B
314/43
G11B 7/085 (2006.01) G01D 15/14 (2006.01) G02B 6/32 (2006.01) G02B 6/42 (2006.01) H01S 3/101 (2006.01) H01S 5/022 (2006.01)
Patent
CA 2029767
A laser scanning system for scanning a laser beam across a material, comprises a laser source for generating a laser beam travelling along a first optical path and a beam reflector in the path of the laser beam. The beam reflector is rotatable about a rotation axis and includes a single mirror facet which extends in a plane oriented at an angle of 45° relative to the rotation axis and has a center of rotation lying on the rotation axis, for reflecting the laser beam into a scanning beam travel- ling along a second optical path orthogonal to the first optical path and moving at a substantially constant angular velocity. A scan lens is disposed in the path of the scanning beam for focusing the scanning beam onto the material and providing a focused beam spot moving repeatedly in a linear direction across the material. The laser scanning system of the invention further includes a support for supporting the laser source, beam reflector and scan lens relative to one another. The support has a unitary body formed with a first bore extending through the body so as to define first and second opposed openings for receiving the laser source and the beam reflector, respectively, and enabling same to be mounted to the body such that the laser beam is aligned with the rotation axis. A second bore extends at least partially through the body and intersects the first bore orthogonally so as to define a third opening for receiving the scan lens and enabling same to b? mounted to the body such that the center of rotation of the mirror facet is aligned with a center point of the scan lens. Such a laser scanning system is particularly useful in laser imaging.
Diehl Carl
Khalid Najeeb Ashraf
Schwartz Stan Kenneth
Escher-Grad Incorporated
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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