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A method and system for processing and reading two-dimensional codes inside transparent materials

A technology of transparent materials and internal processing, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problem of not providing a two-dimensional code reading method.

Active Publication Date: 2022-05-03
WUHAN HGLASER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not provide a complete way to read two-dimensional codes, and this method is aimed at the situation where the upper and lower sides of the transparent glass are not shielded, but in practical applications, the bottom of many transparent materials that need to be coded is shielded Therefore, it is necessary to develop a set of coding and reading technology that is close to the actual engineering application

Method used

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  • A method and system for processing and reading two-dimensional codes inside transparent materials
  • A method and system for processing and reading two-dimensional codes inside transparent materials
  • A method and system for processing and reading two-dimensional codes inside transparent materials

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Experimental program
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Effect test

Embodiment 1

[0042] In this embodiment, an ultraviolet picosecond laser is used to code the glass coated with a smooth ink layer at the bottom, the power is 0.2W, the repetition frequency is 1MHz, the laser action time is 0.06ms, and the processing times are 1 time. It can be obtained that the length of the laser active area is 24.25 μm, the width of the laser active area is 5.45 μm, and the aspect ratio is 4.45. Under the reflected light of the side light source, a clear image can be obtained through the CCD vision system, and accurate reading is obtained.

Embodiment 2

[0044] In this embodiment, an ultraviolet picosecond laser is used to code the glass coated with a rough ink layer at the bottom, the power is 0.6W, the repetition frequency is 1MHz, the laser action time is 0.1ms, and the processing times are 3 times. The length of the laser active area is 54.84 μm, the width of the laser active area is 10.33 μm, and the aspect ratio is 5.309. The side light source is used to illuminate the two-dimensional code area, and the shadow area can be collected and analyzed by the CCD vision system to obtain a clear image and accurate reading.

Embodiment 3

[0046] In this embodiment, an ultraviolet picosecond laser is used to code the glass coated with a rough plastic layer at the bottom, the power is 0.65W, the repetition frequency is 1MHz, the laser action time is 0.1ms, and the processing times are 2 times. It can be obtained that the length of the laser active area is 45.38 μm, the width of the laser active area is 10.19 μm, and the aspect ratio is 4.453. The side light source is used to illuminate the two-dimensional code area, and the shadow area can be collected and analyzed by the CCD vision system to obtain a clear image and accurate reading.

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Abstract

The invention discloses a method for processing and reading a two-dimensional code inside a transparent material. One side of the transparent material has a shielding layer. The method includes: focusing an ultrafast laser pulse to a predetermined position inside the transparent material, controlling the laser pulse to set The fixed repetition frequency and power start from the starting point and process point by point according to the processing track. After each point is processed for the set duration, it jumps to the next point until the processing of all points in the entire two-dimensional code area is realized, and a single processing is completed. Cycle: Illuminate the two-dimensional code area from obliquely upward through the illumination source, use the specular reflection or diffuse reflection of the light on the bottom shielding layer of the transparent material, obtain the target image through the CCD vision system and realize the reading of the two-dimensional code by distinguishing the contrast . The invention also discloses a system for processing and reading two-dimensional codes inside the transparent material. The present invention can prepare a two-dimensional code inside a transparent material covered on one side and realize accurate reading, which is helpful for the engineering application of two-dimensional code code reading.

Description

technical field [0001] The invention belongs to the technical field of ultrafast laser internal engraving of transparent materials, and in particular relates to a method and system for processing and reading two-dimensional codes inside transparent materials. Background technique [0002] Two-dimensional code is a coding method that has developed extremely rapidly in recent years. Compared with traditional barcodes, it can express more information and data types, and has the advantages of wide coding range, strong fault tolerance, and high decoding reliability. Applied in modern production and life. Especially with the rapid development of the Internet, QR codes have been fully used as a link between online and offline, bringing great convenience to people's lives. [0003] At present, most of the two-dimensional code coding technologies use inkjet printing, but the storage time of the two-dimensional code generated by this method is limited, and the two-dimensional code wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/10
CPCB23K26/50B23K26/702G06K7/10722B23K2101/007
Inventor 王雪辉曹思洋陈航王建刚
Owner WUHAN HGLASER ENG CO LTD
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