Method and instrument for detecting infrared ascending conversion material

An infrared up-conversion and detection device technology, which is applied in the detection field of infrared up-conversion materials, can solve the problems of anti-counterfeiting failure, inability to further expand the application range of infrared up-conversion materials, and large limitations, and achieve good anti-counterfeiting performance and convenient anti-counterfeiting detection and effective effect

Inactive Publication Date: 2003-02-19
湖北强大包装实业有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the current detection of infrared up-conversion materials stays at the stage of naked eye observation after excitation by infrared lasers. Since the detection is limited to manual judgment, usually only qualitative judgments can be made on the presence or absence of infrared up-conversion materials. Therefore, using In the case of anti-counterfeiting, the limitations are relatively large. Once the counterfeiter has the infrared up-conversion material, the anti-counterfeiting can be invalidated; at the same time, this pure qualitative judgment cannot further expand the application range of the infrared up-conversion material.

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  • Method and instrument for detecting infrared ascending conversion material
  • Method and instrument for detecting infrared ascending conversion material
  • Method and instrument for detecting infrared ascending conversion material

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Embodiment 1

[0036] Embodiment one: see attached image 3 As shown, a detection device for infrared up-conversion materials includes an infrared laser 1, a lens 2, a support frame 17 (an integrating sphere can also be used) and a detector 6. The infrared laser 1 emits an infrared beam (such as 980nm, the range is 850- 1550nm infrared light can be used for excitation), after passing through the lens 2, it is irradiated on the up-conversion material 3, and the focus point is on the surface of the material. Because the intensity of the infrared light at the focus is high, after the material is excited by the high-intensity infrared light, Partially convert the infrared light into visible light. After the visible light is reflected from the surface of the material, the visible light is incident on the detector 6. The detector converts the optical signal into an electrical signal. After conversion and processing, the authenticity is judged on the display 8.

Embodiment 2

[0037] Embodiment two: see attached Figure 4 As shown, a detection device for infrared up-conversion materials includes an infrared laser 1, a lens 2, an integrating sphere 4 (which can also be a support frame) and a detector 6, and the infrared laser 1 emits an infrared beam (such as 980nm, the range is 850- 1550nm infrared light can be used for excitation), after passing through the lens 2, it is irradiated on the up-conversion material 3, and the focus point is on the surface of the material. Because the intensity of the infrared light at the focus is high, after the material is excited by the high-intensity infrared light, The infrared light is partially converted into visible light. After the visible light is reflected from the surface of the material, it enters the integrating sphere 4. At the same time, the visible light is also incident on the narrow-band filter 5. After narrow-band filtering, it is incident on the detector 6. The detector transmits the optical signal ...

Embodiment 3

[0039] Embodiment three: see attached Figure 5 to attach Figure 7 As shown, an infrared up-conversion material detection device includes an infrared laser 1, a lens 2, an integrating sphere 4 and a three-way detector. The infrared laser 1 emits an infrared beam, which is irradiated on the up-conversion material 3 after being focused by the lens 2. , the focal point is on the surface of the material. After the material is excited by high-intensity infrared light, part of the infrared light is converted into visible light. After the visible light is reflected from the surface of the material, it enters the integrating sphere 4. At the same time, the visible light also enters the narrow-band filter 5, 9 After being filtered by a narrow band, it is incident on the detectors 6 and 10, and the detector converts the optical signal into an electrical signal, and after A / D conversion and processing by a single-chip microcomputer chip, the intensity ratio on each detector is obtained,...

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Abstract

A method and equipment for detecting the infrared converting material used for antiforge purpose features that the infrared beams from infrared laser device are focused on the surface of the said material, its reflected light is incident upon a visual light detector for converting the optical signals to electric ones, and after A/D conversion the digital signals are output.

Description

technical field [0001] The invention relates to a detection method of an infrared up-conversion material and a device for realizing it, and is particularly suitable for applications such as anti-counterfeiting detection, product classification, invisible information storage detection and the like. Background technique [0002] Infrared light is used to excite a material to produce visible light, and the material absorbs two-photons or multi-photons, and the photon energy of the generated visible light is higher than that of the excitation light. This process is called the up-conversion process (UP CONVERSION). attached figure 1 A schematic diagram of the principle of the up-conversion process is given. [0003] Although the up-conversion phenomenon was observed in polycrystalline ZnS as early as 1959, the luminous efficiency of the best up-conversion materials in the early days did not exceed 1‰, and because the emission peak of the light-emitting diod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63
Inventor 陈林森周望沈雁
Owner 湖北强大包装实业有限公司
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