Image forming apparatus

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United States of America Patent

PATENT NO 9091955
APP PUB NO 20150002600A1
SERIAL NO

14305584

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Abstract

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An image forming apparatus controls a semiconductor laser such that first and second light beams among multiple light beams are successively incident on a BD sensor and measures the time interval between BD signals that correspond to the first and second light beams and are output from the BD sensor. Two light emitting elements that output two light beams for which the ratio between the light powers of two light beams detected by the detection unit falls within a predetermined range are set as light emitting elements that are to emit the first and second light beams when the time interval is to be measured. This suppresses measurement errors when measuring the interval between light beams emitted from two light emitting elements and improves correction accuracy for the image writing start positions of the light emitting elements.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Seki, Yuichi Saitama, JP 99 801

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