1989-10-26
1990-11-20
Arnold, Bruce Y.
350434, G02B 2610, G02B 302
Patent
active
049714112
ABSTRACT:
An optical scanning system includes a light source, a condenser lens for condensing a bundle of rays, a first image forming lens for converging the bundle of rays passed through the condenser to form a line image along a main scanning direction, a deflector having a deflection mirror to reflect the line image, and a second image forming lens for converging the bundle of rays deflected by the deflector on a scanning surface so as to form a scanning spot thereon. The second image forming lens includes a single lens. An imaginary converging point of the bundle of rays through the condenser behind the scanning surface is positioned in conjugate relation with the scanning surface. The deflection mirror is positioned in conjugate relation with the scanning surface. The single lens has a distorted cylindrical surface wherein refractive power in the sub-scanning direction varies along the main scanning direction and a toric surface wherein refractive power is positive and different for each of the main and sub scanning directions.
REFERENCES:
patent: 4253735 (1981-03-01), Kawamura et al.
patent: 4379612 (1983-04-01), Hatsuoka et al.
patent: 4585296 (1986-04-01), Minoura et al.
patent: 4712884 (1987-12-01), Sakuma et al.
patent: 4804981 (1989-02-01), Prakash et al.
patent: 4818046 (1989-04-01), Kondo
patent: 4836630 (1989-06-01), Takanashi
patent: 4859011 (1989-08-01), Takahashi
"Conference on Lasers and Electro-Optics", pp. 238-239, published 4/25/88, Anaheim, Calif.
"The Working of Toric Lens Surfaces" Manufacturing Optics, vol. 9, No. 10, Jul. 1956, pp. 528-534.
Arnold Bruce Y.
Kachmarik Ronald M.
Ricoh & Company, Ltd.
LandOfFree
Optical scanning system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical scanning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical scanning system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-450943