Optical scanning apparatus with controlled sag and ghost

Details Optical scanning apparatus with controlled sag and ghost Optical scanning apparatus with controlled sag and ghost

1997-09-11

2000-08-15

Spyrou, Cassandra

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, 359196, G02B 2608

Patent

active

061045225

ABSTRACT:
An optical scanning apparatus includes a light source, a first optical system which includes a coupling lens for coupling a beam from the light source, a polygon mirror for deflecting the beam from the first optical system at a constant angular velocity, and a second optical system which includes a scanning and imaging element for converging the deflected beam on a scanned surface so as to scan the scanned surface substantially at a constant velocity, wherein following conditions are satisfied

REFERENCES:
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patent: 5418639 (1995-05-01), Yamazaki
patent: 5541760 (1996-07-01), Iizuka et al.
patent: 5557448 (1996-09-01), Endo et al.
patent: 5563729 (1996-10-01), Nakamura et al.
patent: 5581392 (1996-12-01), Hayashi
patent: 5652670 (1997-07-01), Hayashi

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