Optical beam scanner

Details Optical beam scanner Optical beam scanner

1991-10-03

1993-04-27

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359217, 359795, G02B 2608, G02B 904

Patent

active

052067556

ABSTRACT:
An optical beam scanner capable of correcting irregularities in pitch of beam scanning as caused by inclination or angular deviations of reflective deflection surfaces of a deflector, the scanner including a first image-forming optical system arranged to form an image of a light beam from a light source linearly on or in the vicinity of a reflective deflection surface of a deflector, and a second image-forming optical system arranged to form an image of the deflected light beam from the deflector on a scanning surface. The second image-forming optical system is constituted, successively from the side of the deflector, by a first singular lens element provided with at least one toric surface and having positive refractive power in a plane of transverse main scan direction, and a second singular lens element provided with either a spherical or cylindrical surface and having negative refractive power in the plane of the main scan direction.

REFERENCES:
patent: 4379612 (1983-04-01), Matsuoka et al.
patent: 4443055 (1984-04-01), Matsuoka et al.
patent: 4919502 (1990-04-01), Yamakawa
patent: 4971411 (1990-11-01), Takanashi
patent: 5015050 (1991-05-01), Itabashi
patent: 5062679 (1991-11-01), Itabashi
patent: 5064261 (1991-11-01), Itabashi
patent: 5136418 (1992-08-01), Itabashi

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