Moisture condensation prevention structure for laser scanning op

Details Moisture condensation prevention structure for laser scanning op Moisture condensation prevention structure for laser scanning op

1991-04-10

1993-04-27

Ben, Loha

Optical: systems and elements

Deflection using a moving element

359216, 359218, 346108, 346160, 355 30, 355233, G02B 2608

Patent

active

052067548

ABSTRACT:
In a laser scanning system employed in an electrophotographic image forming apparatus there are provided a polygon mirror moveably driven in order to enable a laser beam to repeatedly scan a predetermined range and a mirror for reflecting the scanning laser beam to a photoconductive drum in a casing. The casing is separated by a heat insulating member in order to prevent circulation of air therein. Further, a covering member is arranged around the polygon mirror, so as to restrict the occurrence of air flow in the casing due to the movement of the polygon mirror.

REFERENCES:
patent: 4198156 (1980-04-01), Barker et al.
patent: 4297713 (1981-10-01), Ichikawa et al.
patent: 4334762 (1982-06-01), Landa
patent: 4731623 (1988-03-01), Oda et al.
patent: 4868673 (1989-09-01), Negoro
patent: 4945385 (1990-07-01), Kimura

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