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Preparation method of anti-counterfeit paint with property of multiple optics frequency conversion and anti-counterfeit detection method

A frequency conversion and optical technology, applied in the field of preparation and detection of new multi-optical frequency conversion anti-counterfeiting coatings, can solve problems such as poor concealment, and achieve the effects of multiple anti-counterfeiting features, wide applicable temperature range and unchanged frequency conversion characteristics

Inactive Publication Date: 2010-11-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the excited light of the existing ordinary optical frequency conversion anti-counterfeiting coating is in the visible light region, its concealment is poor, and generally only contains one frequency conversion characteristic, and to provide a preparation method for multiple optical frequency conversion anti-counterfeiting coatings and anti-counterfeiting detection method

Method used

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  • Preparation method of anti-counterfeit paint with property of multiple optics frequency conversion and anti-counterfeit detection method
  • Preparation method of anti-counterfeit paint with property of multiple optics frequency conversion and anti-counterfeit detection method

Examples

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Effect test

Embodiment 1

[0030] Example 1: Preparation of novel multiple optical frequency conversion anti-counterfeiting coating

[0031] The steps are as follows: 1. 35% SiO 2 , 17%B 2 o 3 , 18%Na 2 CO 3 , 1%Ba(OH) 2 , 3% Er 2 o 3 , 24%Yb 2 o 3 , 2%Nd 2 O3 (mass fraction) mixed; 2. Take 20g of the mixture and put it into a 30ml corundum crucible; 3. Place the corundum crucible in a high-temperature furnace, and first heat it up from room temperature to 600°C at a speed lower than 7°C / min, and then heat it up at a low temperature. Raise the temperature to 1200°C at a rate of 5°C / min, keep it warm for 60 minutes, then turn off the power of the high-temperature furnace, and take out the crucible; 4. Pour the molten substance in the crucible into cold water to cool; 5. Put the cooled substance in a In the planetary ball mill, ball mill at a speed of 450 rpm for 60 minutes to make a powder of 1-10 microns; 6. Mix the powder with ink in a ratio of 1:10 to make multiple optical frequency conversi...

Embodiment 2

[0032] Example 2: Detecting the anti-counterfeiting properties of the novel multiple optical frequency conversion anti-counterfeiting coating

[0033] Detection methods such as figure 1 As shown, one, the novel multiple optical frequency conversion anti-counterfeiting coating prepared in embodiment 1 is coated on the object to be tested; two, the 980nm laser light emitted by the light emitting chip 1 is collimated and focused by the collimating lens 4 and hits the object to be tested. On the measured object 9, the frequency of the excited light is 1550nm, after being focused and filtered by the 1550nm filter lens 6, it enters the light receiving chip 8, and the signal indicator lights up; After focusing directly on the object 9 to be tested, the frequency of the excited light is 1060nm, after being focused and filtered by the 1060nm filter lens 5, it enters the light receiving chip 7, and the signal indicator lights up; The measured object is "true" (other cases are "false")....

Embodiment 3

[0034] Embodiment 3, low temperature stability test of multiple optical frequency conversion anti-counterfeiting coating

[0035]The coating preparation method is the same as Example 1, but the replacement condition is: the coating prepared in Example 1 is taken out after being frozen at a temperature of -30° C. for 8 hours, and its frequency conversion characteristics are measured immediately. It is found that its characteristics are the same as Example 1. The frequency conversion performance of the invention remains unchanged under low temperature conditions.

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PUM

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Abstract

The invention relates to a preparation method of anti-counterfeit paint with the property of multiple optics frequency conversion and an anti-counterfeit detection method, belonging to the technical field of anti-counterfeit paint. In the invention, based on the spectroscopy theory of rare earth ions and by using the excellent photochromic property of rare earth iond, rare earth is doped with paint to be prepared into novel powder with the property of multiple optics frequency conversion, and the powder is mixed with ink to prepare the anti-counterfeit paint which can be directly painted on the paints of paper, metal, plastic, and the like. The paint has favorable property of multiple optics frequency conversion for converting incident light into infrared light, is high temperature resistant, low temperature resistant and can be used as anti-counterfeit paint.

Description

【Technical field】: [0001] The invention belongs to the technical field of anti-counterfeiting coatings, and in particular relates to optical frequency conversion anti-counterfeiting coatings, in particular to a preparation and detection method of a novel multiple optical frequency conversion anti-counterfeiting coating. 【Background technique】: [0002] The theory of optical frequency conversion is to use a spectral emitting device to excite the surface of the measured object (optical frequency conversion coating) at a specific wavelength to generate an optical signal of another specific wavelength. Since the wavelength of the excitation light source is invisible to the human eye, it has good secrecy and uniqueness, and also has the characteristics of long service life and high difficulty in coating preparation technology, so it has been widely used in the field of anti-counterfeiting, such as attached to financial securities or It can be used as an anti-counterfeiting mark o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/00C09D7/12G09F3/03G01N21/84G01N21/63
Inventor 刘铁根李元耀
Owner TIANJIN UNIV
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