A method for multiple-level high-precision laser imaging

Abstract

The invention relates to laser imaging, in particular to a method for achieving optical fiber dense-row multiple-level high-precision scanning imaging in an optical system of CTP plate making equipment. The method is conducted according to the following steps of principle imaging analysis and imaging operation. According to the multi-level high-precision laser imaging method, the structure is simple, the using cost is low, and the imaging precision is high.

Description

technical field [0001] The invention relates to a laser imaging method, in particular to a method for realizing high-precision scanning imaging at multiple levels of close-packed optical fibers in an optical system of a CTP plate-making device. Background technique [0002] Laser imaging systems used in the field of CTP plate making equipment generally have a problem of laser spot separation, which is caused by the structure of the optical fiber itself. The optical fiber used in the optical system in CTP is generally divided into multi-mode fiber and single-mode fiber. Regardless of multi-mode or single-mode fiber, it at least includes the fiber core (light guide part) and the envelope layer outside the core. For multimode fiber, the typical outer diameter is 125um, and the core diameter is usually 62.5um or 50um, while for single-mode fiber, the core size of the fiber is 8-10um. Due to the existence of the layer, even if the multi-channel optical fibers are closely arrange...

AI Technical Summary

Problems solved by technology

However, in actual operation, since the close-packed line array must be tilted to a large angle, and the tilt angle of each optical fiber must be very precise, this requires very high installation accuracy, and some professional instruments must be used, and the test The precise angle of oblique row needs to be determined by continuous test patterns. Once the angle of oblique row is incorrect, the image on the printing plate will be obviously distorted and deformed, and the stability of the close-packed oblique angle will be poor.

[0004] In addition, for flexographic plate-making equipment, directly scanning and imaging the light spots of the optical fiber will cause problems, because the plate-making of the printing plate will generate relatively large dust, and when the light spots on the printing plate are closely connected at the same time, it will cause problems. The generated dust will affect each other, which not only affects the quality of plate making, but also affects the dust removal system of the dust removal system.

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