Multi-wavelength near-infrared fluorescence quantum dot detection device

Abstract

The invention discloses a multi-wavelength near-infrared fluorescence quantum dot detection device, comprising a fluorescence scanning module, a translation motor and a signal analysis processing module. The fluorescence scanning module comprises a laser diode, a light filter, a stepping motor, a chromatic dispersion device and a photomultiplier; the laser diode is arranged in front of a fluorescence quantum dot bar-shaped code, and an emitted light direction of the laser diode is vertical with the surface of the bar-shaped code; the light filter, the chromatic dispersion device and the photomultiplier are sequentially arranged along a reflection fluorescence direction; the translation motor drives the fluorescence scanning module to entirely move; the signal analysis processing module comprises an A / D (Analogue / Digital) converting module, a single chip microcomputer module, a key module and a display module; the A / D converting module carries out A / D conversion on electric signals of the photomultiplier, and then sends the converted electric signals into the single chip microcomputer module; and a result is sent to the display module after judgment. The detection device can scan the one-dimensional bar-shaped code with the multi-wavelength near-infrared fluorescence quantum dot to obtain encoded fluorescence information contained in the bar-shaped code, and can carry out analysis comparison and judge whether merchandise is true or false.

Description

technical field [0001] The invention belongs to the field of anti-counterfeiting information identification, in particular to a multi-wavelength near-infrared fluorescent quantum dot detection device. Background technique [0002] Semiconductor fluorescent quantum dots have always been a research hotspot. They produce strong fluorescent reflection when stimulated by light, and the fluorescent emission wavelength is regulated by the particle size, including visible light and near-infrared bands. Quantum dots have stable chemical properties and can withstand repeated excitations. The preparation environment parameters are strict and it is extremely difficult to imitate. At present, fluorescent quantum dots have been applied to printing technology. After mixing quantum dots with fluorescent markers such as ink, they are printed, excited by a light source, and the reflection spectrum of quantum dots is monitored. Compared with preset information, authenticity can be identified...

AI Technical Summary

Problems solved by technology

At present, a variety of fluorescent quantum dot detection devices have appeared. For example, the idea of ​​modularization is used to detect weak fluorescent signals, but it cannot detect multi-wavelength fluorescent quantum dots; information, but due to the existence of the upper PC, the device cannot be ported well

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