Laser scanning unit having automatic power control function
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United States of America Patent
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Oct 26, 1999
Grant Date -
N/A
app pub date -
Aug 27, 1996
filing date -
Aug 31, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a laser scanning unit for emitting a laser beam which scans on a surface to be scanned within a predetermined scanning range. The laser scanning unit has a laser diode, and a laser diode controller for controlling the laser diode to emit the laser beam. The laser beam has an intensity corresponding to one of a predetermined graduation steps within a intensity range defined by a first intensity and a second intensity greater than the first intensity in accordance with an image data. The laser scanning unit is further provided with a controller which is capable of shifting the intensity range by changing the first and second intensities.
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