CN103407301A - Internal laser writing method capable of being used for anti-counterfeiting judgment of commodities packaged by transparent materials - Google Patents

Abstract

A laser internal writing method that can be used for commodity anti-counterfeiting in transparent material packaging, the selected pattern is generated into a point cloud file; then the point cloud generation file is imported to form a point cloud marking data software, and the repetition frequency of the laser is adjusted between 1500Hz-1800Hz , the laser pulse width is between 50μs-65μs, the laser power is between 532mw and 760mw, the focusing spot is 30μm, the moving speed of the processing platform is 16000p/s, and the scanning speed of the galvanometer is 3000bit/ms. Perform laser engraving. This anti-counterfeiting technology stamps the logo on the inner surface of the material, and the anti-counterfeiting logo can only be seen clearly when consumers clearly identify the angle and logo pattern. Effectively avoid the lawless act of cheating consumers by reclaiming wine bottles of fake wine. This technology is suitable for anti-counterfeiting of commodities packaged in various transparent materials.

Description

A laser internal writing method that can be used for commodity anti-counterfeiting in transparent material packaging

Technical field:

The invention belongs to product anti-counterfeiting technology, in particular to invent a laser internal writing method that can be used for anti-counterfeiting of goods packaged in transparent materials.

Background technique:

Due to the rapid development of modern technology, counterfeit and shoddy products are becoming more and more rampant, especially products packaged in transparent materials such as famous wines. At present, famous wine manufacturers still use special bottle caps or labels on wine bottles to prevent counterfeiting. However, criminals recycle used wine bottles, fill them with fake wine, repackage them, make huge profits, and deceive consumers. Therefore, how to effectively prevent counterfeiting is an urgent problem to be solved at present.

Based on the above problems, the present invention proposes a technical method for anti-counterfeiting of commodities packaged in transparent materials. This method uses a laser to engrave on the inner surface of a transparent material. Product manufacturers can choose engraving patterns, and this pattern cannot be observed under normal circumstances. Only when consumers clearly identify the angle and logo pattern can they clearly see the anti-counterfeiting logo. Since the manufacturer of the logo pattern product can control it, and only the manufacturer is clear about the logo pattern of the production cycle, it effectively avoids the illegal act of fraudulent elements recycling wine bottles to deceive consumers. And because of the concealment of the anti-counterfeiting mark, consumers can effectively distinguish the authenticity when purchasing, and have a good anti-counterfeiting effect.

Invention content:

The purpose of the present invention is to provide a laser internal writing method that can be used for anti-counterfeiting of transparent material packaging, so as to realize anti-counterfeiting of transparent material packaging such as famous wine and other commodities. This method has the characteristics of strong anti-counterfeiting and concealment, and only the purchasing consumers can clearly identify the anti-counterfeiting angle and the anti-counterfeiting mark to distinguish the true from the false. Moreover, the anti-counterfeiting mark cannot be erased or worn off, and the anti-counterfeiting effect is good.

The principle of the invention: The principle of traditional transparent material laser writing is to focus the pulsed intense laser inside the transparent material, so that the energy density of the laser focus point is greater than the critical value of material destruction, thereby generating vaporization burst points of micron size. Due to the scattering and reflection of light by the burst point, it appears white, and the engraving material used is a transparent material, and the traditional laser internal writing technology is formed through color contrast. However, the method of the present invention selects the pulsed laser to change the microscopic properties such as the refractive index of the transparent material by controlling the pulse energy without generating a macroscopic burst point. Since the bursting point in the traditional inner carving process is not formed, the white color in the traditional carving cannot be seen in the engraved position. After the laser is used to engrave and scan the glass and crystal materials to form the required logo pattern, the logo pattern inside the material can only be clearly seen when the observer looks at the inside of the material from the direction of the 45-degree reflection angle.

In order to solve the above-mentioned technical problems, a laser internal writing method that can be used for commodity anti-counterfeiting in transparent material packaging is characterized in that: use the computer point cloud system to process the point cloud of the logo pattern of the selected merchant to generate a point cloud file. Then import the point cloud generation file to form the point cloud marking data software. By adjusting the repetition frequency of the laser to 1500Hz-1800Hz, the laser pulse width is between 50μs-65μs, and the laser power is between 532mw and 760mw. The focus spot is 30μm, the moving speed of the processing platform is 16000p/s, the scanning speed of the galvanometer is 3000bit/ms, and the laser engraving is carried out on the inner surface of the material.

Further, the material to be engraved is crystal, k9 glass or ordinary white glass, but not limited to the above materials.

Further, the laser used is a green laser.

This pattern cannot be observed under normal circumstances, and the anti-counterfeiting mark can only be clearly seen when the consumer clearly recognizes the angle and the mark pattern.

Description of drawings:

Figure 1. Schematic diagram of processing device

Figure 2. Frontal observation of K9 glass with successful internal engraving

Figure 3: Observing the K9 glass photo of successful internal engraving with an inclination of 45° at 45°

Figure 4. Observing the photo of the successfully engraved crystal inside from the front

Figure 5. Observing the successfully engraved crystal inside at an angle of 45°

Detailed ways:

First of all, it is necessary to point out that this embodiment is only used to further describe the present invention in detail, and should not be construed as limiting the protection scope of the present invention.

Connect the processing equipment according to the schematic diagram of the processing device shown in Figure 1. The computer is connected to the laser with a data connection line; the laser emits the laser through the vibrating mirror and directly acts on the transparent material to be processed; through the motion system, the laser movement is controlled to engrave the pattern.

Example one

Step 1: Select the logo of the merchant as a picture file, use laser engraving, and the computer point cloud system to process the logo picture as a point cloud to generate a point cloud file.

Step 2: Select the transparent material used for product packaging—k9 glass, and clean the glass surface with alcohol.

Step 3: Import the point cloud generation file to form the point cloud marking data software. By controlling the parameters of the green laser, the repetition frequency is 1500Hz, the laser pulse width is 65μs, the laser power is 532wm, and the focus spot is 30μm. The moving speed of the processing platform is 16000p/s, and the scanning speed of the galvanometer is 3000bit/ms.

Step 4: Run the scanning control software, import the point cloud file generated in step 1, and put the materials processed in step 2 into the fixed position of the processing platform. Run the internal carving system. When the internal engraving program is over, the required internal engraving logo map can be obtained.

Accompanying drawing 2 and Fig. 3 are the photographs of prepared inner carving samples.

Example two:

Step 1: Select the logo of the merchant as a picture file, use laser engraving, and the computer point cloud system to process the logo picture as a point cloud to generate a point cloud file.

Step 2: Select the transparent material used for commodity packaging—crystal, and clean the surface of the material with alcohol.

Step 3: Import the point cloud generation file to form the point cloud marking data software. By controlling the parameters of the green laser, the repetition frequency is 1800Hz, the laser pulse width is 60μs, the laser power is 760mw, and the focus spot is 30μm. The moving speed of the processing platform is 16000p/s, and the scanning speed of the galvanometer is 3000bit/ms.

Step 4: Run the scanning control software, import the point cloud file generated in step 1, and put the materials processed in step 2 into the fixed position of the processing platform. Run the internal carving system. When the internal engraving program is over, the required internal engraving logo map can be obtained.

Accompanying drawing 4 and Fig. 5 are the photographs of prepared inner carving samples.

Claims (3)

1. One kind can be for the laser internal carving and writing method of the commodity counterfeit prevention of transparent material packing, utilize computer point cloud system to carry out a cloud identification pattern of the businessman that chooses and process, generate a cloud file; Then import some cloud spanned file and form some cloud marking data software, the repetition rate of adjusting laser instrument is between 1500Hz-1800Hz, laser pulse width is between 50 μ s-65 μ s, laser power is that laser power reaches between 532mw-760mw, focal beam spot 30 μ m, the translational speed of processing platform is 16000p/s, and scan rate of vibrating mirror is 3000bit/ms, carries out body laser inner carving quarter at the material inner surface.
2. 2. a kind of energy, for the method for the laser internal inscription of the commodity counterfeit prevention of transparent material packing, is characterized in that carved material used is crystal, k9 glass or common white glass as claimed in claim 1.
3. 3. a kind of energy, for the method for the laser internal inscription of the commodity counterfeit prevention of transparent material packing, is characterized in that laser instrument used is green laser as claimed in claim 1.

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