Optical exposure unit and image forming unit used in optical exp

Details Optical exposure unit and image forming unit used in optical exp Optical exposure unit and image forming unit used in optical exp

1995-03-22

1998-02-03

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359216, 347244, G02B 2608

Patent

active

057150788

ABSTRACT:
A laser exposure unit of this invention includes a finite focal lens for providing a predetermined characteristic to beams sent from a plurality of light sources, a cylinder lens, a mirror block for forming the respective beams passed through these lenses to be one, first to third image-forming lenses for arranging a deviation characteristic at the image-forming position of the deflected beams, and one or three mirrors for emitting the beams passed through the respective image-forming lenses at a predetermined position. An irradiation of the beam corresponding to image data is provided onto the respective photosensitive members from the respective light sources by timing corrected in accordance with the amount of shift detected by a resist sensor. Therefore, there is provided an image forming unit, which can provide a color image having no missed alignment of color components, and a laser exposure unit, which is suitable for the image forming unit.

REFERENCES:
patent: 4878066 (1989-10-01), Shiraishi
patent: 5064261 (1991-11-01), Itabashi
patent: 5245462 (1993-09-01), Kanai et al.

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