Laser beam receiver
AssigneeTopcon Corporation
InventorsTakaaki Yamazaki, Kenichiro Yoshino, Shichiro Onuma
Life of this patent
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Abstract
A laser beam receiver includes a filter device, and a photodetecting means including a plurality of photodetectors. The laser beam receiver expands a laser beam in a scanning direction in which the laser beam is moved for scanning and diffuses the expanded laser beam by the filter device. The filter device has a lenticular part capable of expanding the laser beam in the scanning direction, and a diffusing part capable of diffusing expanded laser beam.
Claims4
A laser beam receiver for receiving a scanning laser, comprising an optical member, and a photodetecting means including a plurality of photodetectors;
- wherein the photodetectors are arranged on a line substantially perpendicular to a scanning direction in which the laser bean moves for scanning, the optical member is disposed in front of the photodetectors, expands the laser beam in a direction crossing the photodetectors and is capable of diffusing the expanded laser beam such that the shape of the expanded laser beam is maintained.
Dependencies are inferred from the claim text.