Optical scanner

Details Optical scanner Optical scanner

1997-05-05

1998-05-26

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359204, 359217, 359218, 359219, G02B 2608

Patent

active

057575355

ABSTRACT:
An optical scanner in which light beams from a light source are made incident in such a manner as to extend over a plurality of reflecting surfaces of a rotating polygon mirror, comprising: a light source; a first optical system which causes at least divergent light beams of a main scanning direction from the light source to be made into substantially parallel light beams; a rotating polygon mirror which deflects the substantially parallel light beams emitted from the first optical system along a predetermined main scanning direction by the plurality of reflecting surfaces; and a second optical system which causes the light beams deflected by the rotating polygon mirror to be scanned on a surface to be scanned substantially at a uniform velocity and to be converged on the surface to be scanned, wherein the substantially parallel light beams emitted from the first optical system is provided to form a wave surface for correcting an aberration in the second optical system. Accordingly, the wave surface of light beams incident on the rotating polygon mirror is formed so as to correspond to a deflection angle by the first optical system and the aberration in the second optical system is thereby corrected.

REFERENCES:
patent: 4941721 (1990-07-01), Banton et al.
patent: 5278691 (1994-01-01), Kessler
patent: 5315427 (1994-05-01), Rauch et al.
patent: 5367400 (1994-11-01), Harris et al.
patent: 5479583 (1995-12-01), Harris

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