Optical beam scanner, image forming device, and optical beam...

Details Optical beam scanner, image forming device, and optical beam... Optical beam scanner, image forming device, and optical beam...

2008-03-04

2008-03-04

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C250S236000, C359S900000

Reexamination Certificate

active

11509444

ABSTRACT:
An optical beam scanner includes a driving unit rotating a rotary polygon mirror that deflects and scans an optical beam; a rotation position detection unit; a rotation control unit controlling the driving unit in accordance with a rotation reference signal and an output signal of the rotation position detection unit; an optical beam detection unit detecting the optical beam at a predetermined position on a scanning path so as to generate a horizontal synchronizing signal; a first timing generation unit generating a first reference timing so as to print a first surface; a second timing generation unit generating a second reference timing so as to print a second surface; a timing measurement unit measuring a counter value according to the horizontal synchronizing signal; and a phase control unit controlling a phase of the rotation reference signal in accordance with the counter value obtained by the timing measurement unit.

REFERENCES:
patent: 5578819 (1996-11-01), Kataoka et al.
patent: 64-073369 (1989-03-01), None
patent: 09-230273 (1997-05-01), None
patent: 10-20220 (1998-01-01), None
patent: 10-000813 (1998-06-01), None
patent: 2005-193380 (2005-07-01), None

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