Image forming apparatus and exposure image deviation correcting method

Abstract

The invention provides a correction method for an exposal image deflection, which comprises the following steps: sampling detection is carried out on a test version on an imaging plane through an image detecting device to obtain position data of an actual exposal image of an exposal module on the imaging plane; exposal control information which can correct an exposal position deflection of the exposal module on the imaging plane is produced; according to the exposal control information, motion of the exposal module when exposal is carried out on the imaging plane is controlled to carry out compensation and correction. The correction method for an exposal image deflection detects the position data of the actual exposal image through the image examination device to produce the exposal control information for the compensation and the correction, thereby the motion of the exposal module is controlled, and the correction is realized.

Description

technical field [0001] The invention relates to a control method, in particular to a method for correcting exposure image deviation and an imaging device using the method. Background technique [0002] In recent years, computer to plate (CTP) technology has been widely used. CTP is a digital printing plate imaging process. CTP direct plate-making machines are generally directly controlled by a computer, scanned with a laser to form an image, and then developed and fixed to generate a printing plate that can be printed directly on the machine. The external drum CTP is a commonly used exposure structure, which includes a cylindrical imaging drum, a printing plate installed on the surface of the imaging drum, and an exposure module that scans along the axis of the cylinder. [0003] However, a problem with the external drum type CTP is that the splicing of adjacent exposure images generated by the exposure module is not accurate, and there will be gap lines or overlapping line...

AI Technical Summary

Problems solved by technology

[0003] However, one problem with the external drum type CTP is that the splicing of adjacent exposure images generated by the exposure module is not accurate, and there will be gap lines or overlapping lines. To achieve the ideal splicing effect, the imaging accuracy is required to be within 3um

However, due to the difficulty in processing the core component of the imaging drum, it is prone to deformation such as pillow shape, drum shape, and bending, as well as bending or installation errors caused by the processing of the X-axis guide rail, so it is difficult to ensure the ideal exposure effect.

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