Light beam scanning device and image formation lens

Details Light beam scanning device and image formation lens Light beam scanning device and image formation lens

1994-10-11

1996-01-30

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, 359710, G02B 2608

Patent

active

054885027

ABSTRACT:
In a laser beam-scanning apparatus equipped with a rotatable polygonal mirror and an image formation lens system, a lens of the lens system has a cylindrical surface curved in the secondary scanning direction, wherein a radius curvature "rh" on the primary scanning direction section of the cylindrical surface is continuously changed in such a manner that a change pattern in the radius curvature "rh" is non-symmetrical in relation to the optical axis.

REFERENCES:
patent: 5025268 (1991-06-01), Arimoto et al.

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