Lens holding apparatus and a light-beam scanning optical apparat

Details Lens holding apparatus and a light-beam scanning optical apparat Lens holding apparatus and a light-beam scanning optical apparat

1997-10-09

1999-08-24

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, 359821, 359822, 359823, G02B 2608

Patent

active

059431539

ABSTRACT:
A scanning optical apparatus has a convex cylindrical lens and a concave cylindrical lens between a light source for emitting a light beam and a polygon mirror. The cylindrical lenses condense the light beam in the vicinity of a deflecting surface of the polygon mirror only in the sub-scanning direction. The cylindrical lenses are held by a lens barrel to form one unit, and the lens barrel is mounted on a V groove formed in a base. The position of the unit having the cylindrical lenses is adjustable along the optical axis, and the rotational angle of the unit is adjustable about the optical axis.

REFERENCES:
patent: 5148190 (1992-09-01), Iizuka
patent: 5774248 (1998-06-01), Komatsu

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