Image forming apparatus, and method of correcting timing for...

Details Image forming apparatus, and method of correcting timing for... Image forming apparatus, and method of correcting timing for...

2007-07-24

2007-07-24

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C347S234000, C347S248000

Reexamination Certificate

active

10669009

ABSTRACT:
A printer includes laser beam detecting sensors for detecting a laser beams at two positions in the main scanning direction. Write clock generating circuits measure a number of counts of a predetermined clock during a period since one of the laser beam detecting sensors detects each of the beams until another sensor detects the beam. A write clock frequency adjusting circuit takes the number of counts for one laser beam as a reference value and adjusts write clock frequencies of other laser beams so as to coincide with the reference value.

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