Photoacoustic intensity anti-counterfeiting identification device and method based on linear array type mini LED

Abstract

The invention provides a photoacoustic intensity anti-counterfeiting identification device based on a linear array type mini LED. According to the device, a light source linear array module and a linear array ultrasonic sensing module are located under a quartz plate; m6 threaded holes are formed in a heat dissipation fixing plate and used for installing the light source linear array module and the linear array ultrasonic sensing module, the heat dissipation fixing plate is connected with a mechanical displacement device through threads, and displacement is controlled by the mechanical displacement device. Light source linear array modules are installed on heat dissipation fixing plates on the left side and the right side of the linear array sensing module. The linear array ultrasonic sensing module is connected with a pre-signal amplification unit. Through the linear array ultrasonic sensing module and the DOE device, light rays are converted into a linear point focusing double-overlapping structure, the scanning speed and the scanning light intensity are improved on the basis of guaranteeing the linear scanning area, so that the intensity of detected photoacoustic signals, namelyultrasonic signals, is higher, the comparison information of an identification target and a background is more obvious, and the identification result is more accurate.

Description

technical field [0001] The invention relates to a blood vessel strength anti-counterfeiting identification device, in particular to a photoacoustic imaging, subcutaneous blood vessel anti-counterfeiting and biometric identification device and an anti-counterfeiting identification method thereof. Background technique [0002] Photoacoustic blood vessel technology is to use the measured object to absorb light energy, generate photoacoustic effect, and excite photoacoustic signal, that is, ultrasonic imaging. It has the characteristics of high contrast and high resolution, and Young's modulus can be used to distinguish blood vessel photoacoustic signal of different people. And the blood vessels and non-vascular substances of the same person; it can also construct a comparison image of the topological structure of blood vessels according to the intensity of the photoacoustic signal. [0003] Biometric identification uses the inherent physiological and behavioral characteristics ...

AI Technical Summary

Problems solved by technology

[0017] In order to overcome the lack of anti-counterfeiting of the existing vein recognition technology, the present invention provides a photoacoustic intensity anti-counterfeiting recognition device based on a linear array mini (Mini) LED, which avoids unclear images collected by traditional vein recognition and fake blood vessels. And the shortcomings of false identification of forged pictures, and the use of photoacoustic signal intensity threshold anti-counterfeiting of blood vessels in the area to be tested, not only can achieve clear imaging of blood vessel topology, but also carry out anti-counterfeiting identification of photoacoustic threshold image fusion; the diffractive optics used in this system Components (Diffractive Optical Elements, DOE), hereinafter referred to as DOE devices, transform the Mini LED light shaping into a linear point overlapping focusing structure. On the basis of ensuring the scanning line area, the line scanning speed and accuracy are improved, and the linear focus point is improved The light intensity above makes the intensity of the detection ultrasonic wave greater, and the threshold information of the photoacoustic signal obtained is more accurate

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