Optical scanner

Details Optical scanner Optical scanner

1995-11-20

1998-09-08

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359207, 347259, G02B 2608

Patent

active

058053247

ABSTRACT:
In an optical scanner, a deflected light beam is reflected on a reflective image forming element and is converged as a light spot on a scanned face through an elongated lens to perform an optical scanning operation at an equal speed. The reflective image forming element has a reflecting face with rotation symmetry and converges a reflected light beam onto the scanned face in a main scan-corresponding direction. The elongated lens has a barrel type toroidal face as an incident face and has a normal toroidal face as a light emitting face. The elongated lens sets the scanned face and the forming position of a linear image to a substantially conjugate relation in a cross scan-corresponding direction in cooperation with the reflective image forming element. A conjugate magnification m.sub.0 in the conjugate relation of the reflective image forming element and the elongated lens with respect to an image height 0 of the light spot satisfies the following condition:

REFERENCES:
patent: 5233454 (1993-08-01), Sakuma et al.
patent: 5408095 (1995-04-01), Atsuumi et al.
patent: 5426298 (1995-06-01), Sakuma et al.
patent: 5504613 (1996-04-01), Itabashi et al.
patent: 5510826 (1996-04-01), Koide
patent: 5572353 (1996-11-01), Iizuka et al.

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