Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1999-01-14
2000-04-11
Phan, James
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359216, 359217, 347233, 347243, G02B 2608
Patent
active
060494085
ABSTRACT:
An optical scanning apparatus for simultaneously scanning a plurality of light beams. In the apparatus, four light beams emitted from two light emitting portions are allowed to sequentially pass through collimator lenses and cylindrical lenses. Then, a beam splitter synthesizes the light beams so as to be emitted to a mirror surface of a polygonal mirror. Then, the light beams are deflected when the polygonal mirror is rotated so as to be allowed to pass through an imaging lens. Then, the light beams scan and expose (main-scan) the surface of a photosensitive member. When the photosensitive member is rotated by a predetermined quantity, sub-scanning is performed. When the above-mentioned main and sub-scanning are repeated, a latent image for one page is formed on the photosensitive member. When the above-mentioned sequential processes are performed, interlaced scanning is performed under predetermined conditions.
REFERENCES:
patent: 4547038 (1985-10-01), Mori
patent: 5610647 (1997-03-01), Takada
patent: 5850306 (1998-12-01), Fukutome et al.
Masao Ito et al, "Multi Beam Scanning Optics by a Laser Diode Array and Interlaced Scanning", "Optics" No. 8, vol. 23, pp. 492-497, Aug. 1994.
Fuji 'Xerox Co., Ltd.
Phan James
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