Optical deflector device for deflecting laser beam

Details Optical deflector device for deflecting laser beam Optical deflector device for deflecting laser beam

1990-12-03

1992-06-23

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359212, G02B 2610

Patent

active

051248301

ABSTRACT:
An optical deflector is employed in an optical unit incorporated in a laser beam printer. The optical deflector reflects a laser beam, which is emitted by a laser diode and is made to have a cross section of desirable size by a group of conversion lenses, toward a photosensitive body. The optical deflector contains a polygonal mirror having four or eight reflecting surfaces. Each of these reflecting surfaces has a cross section which is convex in a main scanning direction. The polygonal mirror is adhered to the shaft of a motor used for rotating the polygonal mirror. Alternatively, it is adhered to the base member fixed to the shaft.

REFERENCES:
patent: 4357071 (1982-11-01), Markel et al.
patent: 4623216 (1986-11-01), Sato et al.
patent: 4756586 (1988-07-01), Witteveen
patent: 4820005 (1989-04-01), Hashimoto et al.
patent: 4836631 (1989-06-01), Shimazu et al.
patent: 4875748 (1989-10-01), Matsumoto et al.

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