Scanning optical system

Details Scanning optical system Scanning optical system

2005-11-01

2005-11-01

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S207110, C359S216100

Reexamination Certificate

active

06961163

ABSTRACT:
A scanning optical system includes a light source that emits a plurality of beams, a polygonal mirror that deflects the plurality of beams emitted by the light source to scan within a predetermined angular range, and an imaging optical system that converges the plurality of beams on a plurality of surfaces to be scanned, respectively. The imaging optical system includes a scanning lens and a plurality of compensation lenses located between the scanning lens and a plurality of surfaces to be scanned. The plurality of beams passed through the scanning lens are incident on the plurality of compensation lenses, respectively. Each of the plurality of compensation lenses having an anamorphic surface, shapes of which in a main scanning direction are substantially the same with respect to each other.

REFERENCES:
patent: 5251055 (1993-10-01), Koide
patent: 6317245 (2001-11-01), Hama et al.
patent: 6392772 (2002-05-01), Hama et al.
patent: 6392773 (2002-05-01), Hama et al.
patent: 6396615 (2002-05-01), Hama et al.
patent: 6717705 (2004-04-01), Takakubo
patent: 6853470 (2005-02-01), Takakubo

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