Marking apparatus having feedback-controlled rotational laser beam
First Claim
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1. A laser beam irradiation apparatus comprising:
- a laser source for emitting a laser beam;
laser beam projecting means for projecting the laser beam;
scanning means for moving said laser beam projecting means and scanning the laser beam along a laser scanning path;
reflecting means having at least one reflection zone for reflecting the laser beam projected by said projecting means in a direction substantially parallel to the incident laser beam;
laser beam detecting means for detecting a return laser beam reflected from said reflecting means in a direction substantially parallel to the incident laser beam and producing an output based on detection of the return laser beam;
memory means for storing the direction of movement of said scanning means when said laser beam detecting means produces the output based on detection of the return laser beam; and
control means for controlling movement of said scanning means and for pausing the scanning of the laser beam in a particular direction depending on the direction stored in said memory means.
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Abstract
A rotating laser apparatus having a reciprocating laser scanning system which facilitates visual recognition of a laser beam on an object to be measured by raising an effective energy, level on the object. In the apparatus the laser beam is rotated by a rotation device. The reciprocating laser scanning system includes reflection members for reflecting the laser beam, a laser beam detector for detecting a return laser beam reflected from the reflection members, and a microcomputer for controlling a rotation of the rotation device in accordance with the output of the laser beam detector.
52 Citations
6 Claims
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1. A laser beam irradiation apparatus comprising:
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a laser source for emitting a laser beam; laser beam projecting means for projecting the laser beam; scanning means for moving said laser beam projecting means and scanning the laser beam along a laser scanning path; reflecting means having at least one reflection zone for reflecting the laser beam projected by said projecting means in a direction substantially parallel to the incident laser beam; laser beam detecting means for detecting a return laser beam reflected from said reflecting means in a direction substantially parallel to the incident laser beam and producing an output based on detection of the return laser beam; memory means for storing the direction of movement of said scanning means when said laser beam detecting means produces the output based on detection of the return laser beam; and control means for controlling movement of said scanning means and for pausing the scanning of the laser beam in a particular direction depending on the direction stored in said memory means. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification