Optical scanner

Details Optical scanner Optical scanner

2005-09-13

2005-09-13

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

C359S198100, C359S871000, C359S872000

Reexamination Certificate

active

06943926

ABSTRACT:
Provided is an optical scanner capable of preventing a temperature rise in a polygon mirror and its surrounding, and contributing to the prevention of degradation in image quality. Two cells (an inlet and an outlet) among a plurality of cells of a strengthening rib structure disposed in an optical base are connected through a passageway so as to form a flow path of outside air (air), and a bottom surface of a drive board forming part of an outer wall of a containing chamber and supporting a polygon mirror is exposed to the flow path (passageway). Even if a motor and a motor circuit disposed in the drive board generates heat during rotation of the polygon mirror, the drive board is directly cooled by the air flowing through the flow path, so a temperature rise in the polygon mirror and its surroundings can be prevented. Thereby, degradation in scanning characteristics of a laser beam due to deformation of an enclosure resulting from a temperature difference during heat generation can be prevented.

REFERENCES:
patent: 6195190 (2001-02-01), Tachibe et al.
patent: 6201627 (2001-03-01), Ohno et al.
patent: 6813052 (2004-11-01), Yoshizawa
patent: 2001-337290 (2001-12-01), None
patent: 2001-337291 (2001-12-01), None

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