Laser diode assembly for laser scanner system
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United States of America Patent
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-
Jul 5, 1994
Grant Date -
N/A
app pub date -
Aug 7, 1992
filing date -
Aug 7, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A laser source arrangement is provided for use in a laser instrument of a kind used to transmit a scan pattern to a target which is spaced from the laser instrument and to detect light reflected from the target. The laser source arrangement preferably comprises a laser diode for producing a laser beam used to form the scan pattern. The laser diode is characterized by astigmatism which is subject to variation with the temperature of the case of the diode. The arrangement further includes drive apparatus for driving the laser diode in a pulsed mode having a duty cycle which reduces the astigmatism and substantially controls the temperature dependence of the astigmatism. Optics are also provided for statically correcting the astigmatism of the laser diode.
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