Image forming apparatus
First Claim
1. An image forming apparatus including:
- a plurality of image bearing members;
an optical system having a plurality of light emitting elements suitable for generating light beams for scanning said image bearing members, a single polygon mirror suitable for deflecting the light beams generated from said plurality of light emitting elements onto said image bearing members, and a beam detector corresponding to at least one of said plurality of image bearing members, and for receiving the light beams scanned by said polygon mirror and producing a first synchronizing signal for recording an image on the relevant image bearing member;
a storing portion suitable for storing therein information regarding an error of each side of said polygon mirror; and
a producing unit suitable for producing a second synchronizing signal for recording an image on the image bearing member not provided with said beam detector, by delaying the first synchronizing signal outputted from said beam detector, on the basis of a value of said storing portion.
1 Assignment
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Accused Products
Abstract
This invention has as its object to provide an image forming apparatus in which the number of beam detectors is decreased and which is low in cost and high in the accuracy of the registration position of an image of each color as well as high in quality. To this end, The image forming apparatus is provided with a plurality of image bearing members, an optical system having a plurality of light emitting elements suitable for generating light beams for scanning the image bearing members, a single polygon mirror suitable for deflecting the light beams generated from the plurality of light emitting elements onto the image bearing members, and a beam detector corresponding to at least one of the plurality of image bearing members, and for receiving the light beams scanned by the polygon mirror and producing a first synchronizing signal for recording an image on the relevant image bearing member, a storing portion suitable for storing therein information regarding the error of each side of the polygon mirror, and a producing unit suitable for producing a second synchronizing signal for recording an image on the image bearing member not provided with the beam detector, by delaying the first synchronizing signal outputted from the beam detector, on the basis of the value of the storing portion.
21 Citations
12 Claims
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1. An image forming apparatus including:
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a plurality of image bearing members;
an optical system having a plurality of light emitting elements suitable for generating light beams for scanning said image bearing members, a single polygon mirror suitable for deflecting the light beams generated from said plurality of light emitting elements onto said image bearing members, and a beam detector corresponding to at least one of said plurality of image bearing members, and for receiving the light beams scanned by said polygon mirror and producing a first synchronizing signal for recording an image on the relevant image bearing member;
a storing portion suitable for storing therein information regarding an error of each side of said polygon mirror; and
a producing unit suitable for producing a second synchronizing signal for recording an image on the image bearing member not provided with said beam detector, by delaying the first synchronizing signal outputted from said beam detector, on the basis of a value of said storing portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification