Scanning optical device

Details Scanning optical device Scanning optical device

1997-01-31

1998-06-02

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359209, 359216, 250234, G02B 2608

Patent

active

057609446

ABSTRACT:
A scanning optical device that includes a light source that emits a light flux; a polygon mirror for deflecting the light flux; a scanning lens for converging the light flux deflected by the polygon mirror to form a beam spot on an image surface; a dynamic prism that is rotatably disposed between the light source and the polygon mirror to affect the direction of the light flux; a driving mechanism for rotating the dynamic prism to change the deviation angle of the dynamic prism; and a controller for controlling the driving mechanism to change the position of the beam spot during scanning.
In particular, the controller rotates the dynamic prism to compensate for errors that affect the position of the beam spot on the image surface, such as errors that vary with time and errors that occur randomly during the scanning process.

REFERENCES:
patent: 4600837 (1986-07-01), DiStefano et al.
patent: 4850686 (1989-07-01), Morimoto et al.
patent: 5255115 (1993-10-01), Kikuchi
patent: 5383047 (1995-01-01), Guerin
patent: 5498869 (1996-03-01), Appel et al.

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