Laser beam scanning apparatus

Details Laser beam scanning apparatus Laser beam scanning apparatus

1983-02-03

1987-02-17

Corbin, John K.

350 68, G02B 2610

Patent

active

046435166

ABSTRACT:
In laser beam scanning by a rotating polygonal mirror, a hologram scanner, etc., a cylindrical lens having a refractive power in a sub-scanning direction is introduced to place the beam deflecting surface and the scanning surface in a geometrical-optically conjugative relation, in order to prevent occurrence of a deviation in position of scanning line due to a deviation of the beam deflecting surface. However, in a Gauss beam such as a laser beam, a beam waist is not produced in a geometrical-optical conjugate point. This relation is utilized to select optical elements whereby apparatus may be miniaturized and the size of the beam spot may be adjusted.

REFERENCES:
patent: 3853406 (1974-12-01), Zanoni

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