Method for engraving miniature two-dimensional code in glass laser

Abstract

The invention relates to the technical field of laser engraving, in particular to a method for engraving a miniature two-dimensional code in glass laser. The method for engraving the miniature two-dimensional code in the glass laser comprises the following steps that a DATAMATRIX two-dimensional code encoding method is used for generating an initial two-dimensional code drawing file of a circle pattern; and a single-point mode two-dimensional code drawing file composed of a plurality of independent single points is generated according to the initial two-dimensional code drawing file of the circle pattern; processing delay parameters are arranged behind the each single point of the single-point mode two-dimensional code drawing file, and a target two-dimensional code drawing file is generated; a glass sample is located through a coaxial CCD camera, and the position to be processed is calculated; and an optical path is adjusted to enable the focused spot size of a laser beam to be smaller than a calibration value, a focus point of the laser beam is moved to the position to be processed inside the glass sample, and the two-dimensional code processing is carried out according to the target two-dimensional code drawing file. The tailing phenomenon caused by a galvanometer when the action time of a picosecond laser is extremely short is effectively prevented, and two-dimensional small-size engraving is enabled to be possible.

Description

technical field [0001] The invention relates to the technical field of laser engraving, in particular to a method for engraving miniature two-dimensional codes inside glass with laser. Background technique [0002] With the rapid development of Internet technology and smart devices, information dissemination and identification has become one of the indispensable technologies for modern devices. Early barcodes were mainly printed on the surface of goods and were scanned and recognized by machines based on the principle of spectroscopy. One-dimensional barcodes have been widely used in warehousing, industrial production, library management and other fields in the 1980s. One-dimensional barcodes have defects such as small data capacity, poor confidentiality, and poor readability after defects and dirt, making it difficult to meet the needs of an information society. Two-dimensional code is a comprehensive technology developed on the basis of one-dimensional barcode, which int...

AI Technical Summary

Problems solved by technology

[0005] The existing laser marking two-dimensional code is relatively large, and its concealment is not good, resulting in poor anti-counterfeiting effect

Due to the limitation of the size of the light spot, if the size of the QR code is reduced, the light spots will continue to overlap, resulting in local accumulation of glass and damage to the explosion point, making it impossible to identify

At the same time, when the two-dimensional code is small, the action time of the picosecond laser is extremely short, and the vibrating mirrors currently on the market cannot meet such high precision requirements and response time

Therefore, using picosecond lasers to scan small-sized QR codes will be affected by the vibrating mirror, which will cause tailing at the bottom of the dots and overlap of spots, making it impossible to obtain clearly visible QR codes.

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