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Proceedings Paper

Multiple-beam scanning optics for ultrahigh-speed and high-resolution laser printer
Author(s): Keiji K.K. Kataoka
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Paper Abstract

Laser printers are steadily advancing toward high speed and high resolution. The rotation speed of a polygonal mirror for scanning beams and the data rate for printing are going to be over practical limits. The simultaneous scanning of multiple beams in an array is an effective method to eliminate these problems. The arrayed multiple beams can be generated by devices such as grating, Wollaston prisms, optical fiber array and laser diode array. In any of these devices, the focused arrayed spots have a period of several tens of times larger than the spot diameter. To produce consecutive scan lines using these devices, we proposed the slat scanning method where the arrayed multiple beams are arranged in a slant angle to the scanning direction. For realizing high speed and high resolution in laser printers, the slat scanning method has an advantage in that it is applicable to the case in which the number of beams is large because the multiple beams pass in the vicinity of the scanning plane and the optical aberrations are kept small. We demonstrated high performance printings which are, for example, a print speed of 1,168 mm/sec with a 300 dpi(11.8 dot/mm) print dot density using two beams generated by a Wollaston prism and a print speed of 825.5 mm/sec with a 600 dpi( 23.6 dot/mm) print dot dnesity using five beams generated by a grating, both of which have a wide print width of 431.8 mm(17")

Paper Details

Date Published: 21 September 1998
PDF: 10 pages
Proc. SPIE 3482, International Optical Design Conference 1998, (21 September 1998); doi: 10.1117/12.322056
Show Author Affiliations
Keiji K.K. Kataoka, Hitachi Koki Co. Ltd. (Japan)

Published in SPIE Proceedings Vol. 3482:
International Optical Design Conference 1998
Leo R. Gardner; Kevin P. Thompson, Editor(s)

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