Light scanning system

Details Light scanning system Light scanning system

1987-05-22

1990-07-17

Arnold, Bruce Y.

350 65, G02B 2610

Patent

active

049417193

ABSTRACT:
A light scanning system employing a rotating mirror, spherical lens, and a toric-surfaced reflecting mirror. The toric-surfaced reflecting mirror is disposed in the optical path between the spherical lens and the image plane. The spherical lens sufficiently corrects field curvature and the toric-surfaced reflecting mirror corrects scan nonlinearity. And by the spherical lens and the toric-surfaced reflecting mirror together, the field curvature and the scan nonlinearity are satisfactorily corrected. The toric-surfaced reflecting mirror is surfaced to have a circular arc with a larger radius of curvature in the scan plane and to have a circular arc with a smaller radius of curvature in the cross-scan plane.

REFERENCES:
patent: 4248495 (1981-02-01), Minoura
patent: 4571035 (1986-02-01), Sakuma
patent: 4636069 (1987-01-01), Balasubramanian
patent: 4639072 (1987-01-01), Itoh et al.
patent: 4687933 (1987-08-01), Loy
patent: 4733064 (1988-03-01), Ishikawa
Matsuda et al, "Laser Printer Scanning System with a Parabolic Mirror", Applied Optics, vol. 17, No. 6, Mar. 15, 1978, pp. 878-884.

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