上转换发光防伪检测技术研究
文献类型：学位论文
| 作者 | 胡卓非 |
| 学位类别 | 硕士 |
| 答辩日期 | 2016 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 黄立华 |
| 关键词 | 上转换发光 防伪检测 QR二维码 |
| 其他题名 | Research of anti-counterfeiting detection technology based on up-conversion luminescence |
| 中文摘要 | 随着市场经济的不断发展，假冒伪造活动日益增多，已成为影响我国国民经济发展的一大公害。基于净化市场、打假治劣及维护各方合法利益的客观需求，市面上涌现出了各种防伪技术及相应的防伪检测技术。上转换发光防伪技术是以上转换发光材料（Up-Converting Phosphor，简称为UCP）作为防伪标识物，以上转换发光材料的分布、荧光强度及荧光光谱等作为防伪信息，以及采用上转换发光防伪检测技术作为防伪识别方法的一种防伪技术。上转换发光材料在红外光激发下能产生多光谱荧光，且具有化学稳定性强、隐蔽性好、防伪性能强、制备难度大等特点，因此这种材料在防伪领域中具有广阔的应用前景。上转换发光防伪检测技术通过对以无色油墨形式印刷在载体上的上转换发光材料的分布、强度及荧光光谱等进行检测以达到防伪的目的。该防伪检测技术具有重要的研究意义及极大的应用价值。 本文围绕上转换发光防伪检测技术开展了相关研究，主要内容如下： (1)概括了应用最广泛的一项防伪技术——印刷防伪技术的发展与应用，详述了印刷防伪图形——QR码的主要特点、符号结构和译码过程，归纳了印刷防伪材料——上转换发光材料应用于防伪领域的独特优势，阐述了上转换发光防伪检测技术的发展现状，并指出了该防伪检测技术的研究意义。 (2)详述了上转换发光材料相关理论知识，具体包括上转换发光材料的发光机制、影响上转换发光材料发光效率的因素、上转换发光材料的光学特性以及常用的制备方法等。 (3)为了提高防伪技术的隐蔽性，基于上转换材料发光原理，研究了一种防伪标识物和辨识信息皆人眼不可见的防伪检测技术，研制了一台便携式上转换发光防伪检测仪。该防伪检测技术将上转换发光材料以无色油墨的形式印刷在纸张上，采用人眼不可见的红外光激发无色油墨，以及采用被激发出的近红外荧光为辨识信息。本文首先开展了便携式上转换发光防伪检测仪的整体设计，之后详述了照明模块、成像模块及电控模块的设计方案，并针对两种印有不同上转换发光材料的样品开展了实验研究。实验结果表明，此便携式上转换发光防伪检测仪基本能辨识出防伪信息。为了进一步提高辨识率，文中给出了改进的设计方案。 (4)将信息量丰富的二维码与上转换发光防伪技术相结合，开展了上转换发光二维码检测技术研究，研制了一台上转换发光二维码防伪检测仪。该检测仪由照明模块、成像模块、电控模块和算法模块组成。本文首先开展了该检测仪的总体设计，之后详述了照明模块、成像模块、电控模块和算法模块的设计方案，并针对两种不同的上转换发光二维码开展了实验研究。实验结果表明，上转换发光二维码防伪检测仪能对印刷在纸张上的二维码形式的上转换发光材料点阵进行快速检测，进而通过算法模块对所获取的上转换发光二维码图像进行处理，最终获得了能满足后续译码需求的二维码图像。 (5)总结了本论文取得的主要成果，列出了主要创新点，并指出了下一步需要开展的工作。 |
| 英文摘要 | With the continuous development of market economy, counterfeiting activities is more and more rampant, which has become a great public hazard influencing on our country's national economic development. Based on the objective demands of purifying the market, fighting fake goods, and protecting the interests of all parties, all kinds of anti-counterfeiting technologies and their corresponding security detection technologies arise in the market. Anti-counterfeiting technology based on up-conversion luminescence is a kind of security technology which uses UCP as an anti-counterfeiting marker, uses UCP’s distribution, fluorescence intensity or spectrum as anti-counterfeiting information，and uses up-conversion luminescence security detection technology as a security identification method. UCP can emit multispectral fluorescence under the infrared radiation, and has the characteristics of high chemical stability, great preparation difficulty, high concealment, strong security performance, etc. So this kind of material has a broad application prospect in the field of security. Up-conversion luminescence security detection technology achieved the purpose of anti-counterfeiting by detecting the distribution, fluorescence intensity or spectrum of UCP, which is printed on the carrier in the form of colorless ink. And this kind of security detection technology has important research significance and great application value. This article carried out related research on the up-conversion luminescence security detection technology. The main contents are as follows: (1)Summed up one kind of most widely used security technology, namely, printing anti-counterfeiting technology’s development and application. Detailed the main characteristics, the symbol structure and decoding process of one printing anti-counterfeiting graph，namely, QR codes. Summarized a new kind of printing anti-counterfeiting material, namely, UCP and its unique advantages applied in the field of anti-counterfeiting. Expounded the development present situation of the up-conversion luminescence security detection technology, and pointed out the research significance of this security detection technology. (2)Detailed the related theory knowledge of UCP, including its luminescence mechanism, factors influencing on the luminous efficiency, optical properties and commonly used preparation methods, etc. (3)In order to improve the concealment of the anti-counterfeiting technology, on the basis of the luminescence principle of UCP, studied a kind of security detection technology which anti-counterfeiting marker and identification information are not visible to the human eyes, and developed a portable UCP anti-counterfeiting detector. This kind of security detection technology prints UCP in the form of colorless ink on the carrier, uses invisible infrared light to excite UCP, and uses near-infrared fluorescence as the identifying Information. Firstly, this part carried out the whole design of the detector, then detailed the design scheme of lighting module, imaging module and electronic control module, and carried out experimental research on two kinds of samples printed with different UCP material. The experimental results shows that the portable UCP anti-counterfeiting detector can distinguish mostly UCP material printed on two kinds of samples. Finally in order to further improve the recognition rate, the improved design scheme was given in this paper. (4)Combining anti-counterfeiting technology with QR code which has rich information, carried out research on UCP QR code security detection technology, and developed a UCP QR code anti-counterfeiting detector. The detector consists of lighting module, imaging module, electronic control module and algorithm module. First of all, this part expounded the overall design scheme of the detector, then detailed the design scheme of each component modules and carried out experimental research on two different UCP QR code. The experimental results shows that the UCP QR code anti-counterfeiting detector can rapidly detect UCP dot matrix printed on the paper in the form of QR code, and then processed the QR code image by algorithm module, finally obtained the QR code image that can meet the demand of subsequent decoding process. (5)Summarized the main achievements of this paper, listed the main innovative points, and pointed out the next work need to do. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16961]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 胡卓非. 上转换发光防伪检测技术研究[D]. 中国科学院上海光学精密机械研究所. 2016. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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