Coherent light generators – Particular component circuitry – Having feedback circuitry
Reexamination Certificate
2011-06-28
2011-06-28
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular component circuitry
Having feedback circuitry
C372S029011
Reexamination Certificate
active
07970029
ABSTRACT:
Semiconductor lasers are driven such that high output laser beams are stably obtained without a long start up time. The light outputs of a plurality of semiconductor lasers are detected by photodetectors. The semiconductor lasers are driven by automatic power control based on comparison results between the output of the photodetectors and a set value corresponding to a target light output for the semiconductor lasers. A correction pattern that corrects the set value and/or the output of the photodetectors such that the actual light output becomes uniform is generated in advance. The set value and/or the output are varied according to the correction pattern for a predetermined period of time from initiation of drive. A single correction pattern is employed in common with respect to the plurality of semiconductor lasers.
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FUJIFILM Corporation
Golub-Miller Marcia A.
Harvey Minsun
Sughrue & Mion, PLLC
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