Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-06-10
1999-04-27
Spyrou, Cassandra
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359207, 359208, 359216, 359217, G02B 2608
Patent
active
058985140
ABSTRACT:
An optical beam scanner is provided in which light emitted from a light source and transmitted through a slit formed in a diaphragm plate is made incident upon a polygonal mirror through a cylindrical lens having positive power in the sub-scanning direction. The light reflected by the polygonal mirror is converged onto an object surface to be scanned through an optical image forming system. A plane mirror is provided between the diaphragm plate and the polygonal mirror to reflect the light emitted from the light source toward the polygonal mirror. The optical elements provided between the light source and the optical image forming system are housed in a casing having a bottom surface perpendicular to the axis of rotation of the polygonal mirror. The light emitted from the light source toward the plane mirror is parallel with the bottom surface. The light incident upon the polygonal mirror and the light reflected by the polygonal mirror are separated in the sub-scanning direction. The slit has different diameters in two orthogonal directions. The longitudinal direction of the slit is inclined with respect to the bottom surface, so that the longitudinal direction of a slit image projected on a reflection surface of the polygonal mirror through the plane mirror is substantially parallel with the bottom surface. The direction of the generatrix of the cylindrical lens is inclined with respect to the bottom surface in the same direction as the longitudinal direction of the slit.
REFERENCES:
patent: 4823002 (1989-04-01), Saito
patent: 5134513 (1992-07-01), Morimoto
patent: 5572353 (1996-11-01), Iizuka
patent: 5621562 (1997-04-01), Hama
patent: 5724172 (1998-03-01), Ota
patent: 5748354 (1998-05-01), Iizuka
patent: 5793514 (1998-08-01), Taylor et al.
Asahi Kogaku Kogyo Kabushiki Kaisha
Cherry Eundra
Spyrou Cassandra
LandOfFree
Beam 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 Beam scanning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beam scanning system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-688919