Scanning optical apparatus

Details Scanning optical apparatus Scanning optical apparatus

2006-10-11

2009-02-17

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07492496

ABSTRACT:
A scanning optical apparatus capable of maintaining sub scanning magnification small, and further, keeping the apparatus size small without elongating lenses, also suppresses spherical aberration relative to a scanning surface of a beam light small, thereby illuminating the beam light of high quality on the scanning surface. A beam light from a scanner is magnified by a scanning lens (magnifying lens), allowing sub scanning magnification be minimized. Also, while spherical aberration is normally aggravated since the beam light is magnified by the scanning lens, spherical aberration is suppressed by forming a correcting lens downstream from the scanning lens in a surface-decentered shape with respect to a light axis of the beam light.

REFERENCES:
patent: 6535317 (2003-03-01), Ishibe
patent: 9-080331 (1997-03-01), None

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