Optical scanning apparatus

Details Optical scanning apparatus Optical scanning apparatus

1999-03-02

2000-07-11

Epps, Georgia

Optical: systems and elements

Lens

High distortion lens

359205, 359206, 359216, G02B 300, G02B 2608

Patent

active

060881674

ABSTRACT:
In an optical scanning apparatus for causing a luminous flux from a rotary polygon mirror 4 to form an image on a surface to be scanned 6, a concave lens 5a functions not only as one constituent of an f .theta. lens with respect to the luminous flux scanned by the rotary polygon mirror 4 but also as a cylindrical lens for forming a linear image in the vicinity of a deflecting and reflecting surface of the rotary polygon mirror 4 with respect to a luminous flux from a laser light source 1. The luminous flux directed from the light source 1 to the rotary polygon mirror 4 is passed through the concave lens 5a such as to intersect the optical axis of the f .theta. lens.

REFERENCES:
patent: 5438450 (1995-08-01), Saito

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