Optical scanning system

Details Optical scanning system Optical scanning system

1988-07-29

1990-02-20

Arnold, Bruce Y.

350319, G02B 2610, G02B 500

Patent

active

049020846

ABSTRACT:
An optical scanning apparatus and method that repeatedly scans a beam of light longitudinally along an outer photosensitive surface of a cylindrical drum, in synchronism with a rotation of the drum about is central longitudinal axis, whereby the beam traces a raster scan pattern on the surface. An aperture plate having an alongated aperture formed in it is positioned adjacent to the drum, with the aperture's axis oriented substantially parallel with the drum's axis. The aperture's width in a cross-scan direction, perpendicular to the longitudinal scan direction, is narrower than the cross-scan width of the scanning beam, such that the aperture transmits to the drum surface only a narrow portion of the beam. The location and the intensity of the portion of the beam transmitted through the aperture of the drum surface is substantially unaffected by a limited cross-scan deviation of the beam.

REFERENCES:
patent: 4108532 (1978-08-01), Minoura
patent: 4179183 (1979-12-01), Tateoka et al.
patent: 4247160 (1981-01-01), Brueggemann
patent: 4502757 (1985-03-01), Maeda
patent: 4512625 (1985-04-01), Brueggemann
patent: 4538895 (1985-09-01), Higgins et al.
patent: 4571035 (1986-02-01), Sakuma
patent: 4620768 (1986-11-01), Tatsuno et al.
Imaging with Laser Scanners, Optic News, Nov., 1986, by Leo Beiser.

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