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, said scanning means having a first mode and a second mode;
reflecting means for reflecting the laser beam projected by said projecting means, said reflecting means including first and second reflection zones having a space therebetween along said laser scanning path;
laser beam detecting means for detecting a return laser beam reflected from said reflecting means and producing an output based on detection of the return laser beam; and
control means for changing operation of said scanning means from said first mode to said second mode based on the output of said laser beam detecting means when said laser beam detecting means detects a return laser beam from both of said first and second reflection zones.
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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 a reflection members for reflecting the laser beam, a laser beam detector for detecting a return laser beam reflected from the reflection member, and a microcomputer for controlling a rotation of the rotation device in accordance with the output of the laser beam detector.
62 Citations
7 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, said scanning means having a first mode and a second mode; reflecting means for reflecting the laser beam projected by said projecting means, said reflecting means including first and second reflection zones having a space therebetween along said laser scanning path; laser beam detecting means for detecting a return laser beam reflected from said reflecting means and producing an output based on detection of the return laser beam; and control means for changing operation of said scanning means from said first mode to said second mode based on the output of said laser beam detecting means when said laser beam detecting means detects a return laser beam from both of said first and second reflection zones. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification