Positional correction for apparatus having a plurality of drawing systems
First Claim
1. An apparatus for forming an image by use of a plurality of light beams, which are simultaneously modulated according to image signals and joined together on a photoconductive surface to form the image, comprising:
- a photoconductive drum having the photoconductive surface and a reference mark;
an pattern supplying unit which supplies image data in synchronization with detection of the reference mark associated with rotation of the photoconductive drum; and
drawing systems which create moiré
stripes on the photoconductive surface by simultaneously drawing overlapping sets of slanted lines with the respective light beams according to the image data, and draw a reference position mark on the photoconductive surface according to the image data.
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Accused Products
Abstract
An apparatus for forming an image by use of a plurality of light beams, which are simultaneously modulated according to image signals and joined together on a photoconductive surface to form the image. The apparatus includes a photoconductive drum having the photoconductive surface and a reference mark, a pattern supplying unit which supplies image data in synchronization with detection of the reference mark associated with rotation of the photoconductive drum, and drawing systems which create moir{acute over (e )} stripes on the photoconductive surface by simultaneously drawing overlapping sets of slanted lines with the respective light beams according to the image data, and draw a reference position mark on the photoconductive surface according to the image data.
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Citations
16 Claims
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1. An apparatus for forming an image by use of a plurality of light beams, which are simultaneously modulated according to image signals and joined together on a photoconductive surface to form the image, comprising:
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a photoconductive drum having the photoconductive surface and a reference mark;
an pattern supplying unit which supplies image data in synchronization with detection of the reference mark associated with rotation of the photoconductive drum; and
drawing systems which create moiré
stripes on the photoconductive surface by simultaneously drawing overlapping sets of slanted lines with the respective light beams according to the image data, and draw a reference position mark on the photoconductive surface according to the image data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for adjusting position of a plurality of light beams, which are simultaneously modulated according to image signals and joined together on a photoconductive surface to form an image, comprising:
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a photoconductive drum having the photoconductive surface and a reference mark;
an pattern supplying unit which supplies image data in synchronization with detection of the reference mark associated with rotation of the photoconductive drum;
drawing systems which create moiré
stripes on the photoconductive surface by simultaneously drawing overlapping sets of slanted lines with the respective light beams according to the image data, and draw a reference position mark on the photoconductive surface according to the image data; and
a circuit which adjusts position of the light beams on the photoconductive surface in a main scan direction according to comparison between position of the moiré
stripes and position of the reference position mark, the main scan direction being substantially parallel to an axis of the photoconductive drum.
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9. An apparatus for forming an image by use of a plurality of light beams, which are simultaneously modulated according to image signals and joined together on a photoconductive drum to form the image, comprising:
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means for forming a reference position mark on the photoconductive drum; and
means for forming moiré
stripes on the photoconductive drum by simultaneously drawing overlapping sets of slanted lines with the respective light beams. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An apparatus for adjusting position of a plurality of light beams, which are simultaneously modulated according to image signals and joined together on a photoconductive drum to form an image, comprising:
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means for forming a reference position mark on the photoconductive drum;
means for forming moiré
stripes on the photoconductive drum by simultaneously drawing overlapping sets of slanted lines with the respective light beams; and
means for adjusting position of the light beams on the photoconductive drum in a main scan direction according to comparison between position of the moiré
stripes and position of the reference position mark, the main scan direction being substantially parallel to an axis of the photoconductive drum.
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Specification