Multi-beam scan optical system

Details Multi-beam scan optical system Multi-beam scan optical system

1992-08-25

1995-11-28

Fuller, Benjamin R.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347238, 347241, B41J 2455

Patent

active

054712360

ABSTRACT:
A multi-beam scan optical system for writing image information. The system includes a laser array having a plurality of laser diodes, a collimate lens for collimating a plurality of laser beams output from the laser diodes, and an optical member for focusing the collimated laser beams. An aperture is disposed at a position where optical axes of the plurality of laser beams cross an optical axis of the optical member. The system includes a relationship between a distance r.sub.1 of separation of the laser diodes, a divergence angle .theta., of each of the laser beams, a wavelength .lambda. of each of the laser beams, and an interlace scanning period i, wherein these values satisfy the relation: ##EQU1## where K is a number in a range from 1.0 to 1.8. The value .alpha. depends on the diameter of the aperture as viewed in a subsidiary scan direction and satisfies the relation:

REFERENCES:
patent: 4530574 (1985-07-01), Scifres et al.
patent: 4878066 (1989-10-01), Shiraishi
"Optics Four Academies," the 6th Color Optics Conference Paper Collection, 1989, pp. 77-80.
Yariv, Amnon, Optical Electronics, Saunders College Publishing, Orlando, Fla., 1991, pp. v-xiii and 46-53.

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