Scanning optical systems

Details Scanning optical systems Scanning optical systems

1998-11-17

2000-08-15

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359216, G02B 2608

Patent

active

061045217

ABSTRACT:
A scanning optical system includes a light source for emitting a beam of light and a first optical system that changes a cross-sectional shape of the beam into an oblong shape along a main scanning direction. A light deflector deflects the oblong cross-sectioned beam of light in the main scanning direction, and a second optical system receives a beam of light deflected by the light deflector for focusing the deflected beam of light onto a scanning surface. At least one surface of a lens in the first optical system is formed as a sub-scanning-plane aspherical surface so as to correct the spherical aberration of the scanning optical system in a sub-scanning direction caused by the second optical system.

REFERENCES:
patent: 5005928 (1991-04-01), Suzuki et al.
patent: 5189546 (1993-02-01), Iizuka
patent: 5255113 (1993-10-01), Yoshikawa et al.
patent: 5418639 (1995-05-01), Yamazaki
patent: 5453870 (1995-09-01), Iima
patent: 5715078 (1998-02-01), Shiraishi

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