Optical fingerprint identification device with living body identification function

Abstract

The invention relates to an optical fingerprint identification device with a living body identification function, and belongs to the technical field of information security identity authentication. The invention provides an optical fingerprint identification device with a living body identification function. The optical fingerprint identification device comprises a transparent electrode, a resistance / voltage conversion circuit, a light source, a collimating lens, an acquisition prism, an imaging lens, an image sensor, a single-chip microcomputer and a server. According to the optical fingerprint identification device, the resistance measurement circuit composed of the transparent electrode and the resistance / voltage conversion circuit is used for detecting a finger skin resistance change signal; since the resistivity of the artificial fingerprint is very large and basically unchanged, and the human skin resistance is small and continuously fluctuates along with the excitation degree ofthe sympathetic nerve of the human body, therefore, the living body fingerprint and the artificial fingerprint can be rapidly identified by measuring the size and change of the resistance of the finger skin; the problems that the artificial fingerprint is easy to cheat the optical fingerprint identification device and the optical fingerprint identification device cannot identify the living body fingerprint are solved, and the safety of the fingerprint identification technology is improved.

Description

technical field [0001] The invention belongs to the technical field of information security identity authentication, and in particular relates to an optical fingerprint identification device with a living body identification function. Background technique [0002] Fingerprints are the texture features formed by the uneven ridges or valleys on the pads of human fingers. Since each person's fingerprints are unique and remain unchanged for a lifetime, it is much safer to use fingerprint recognition devices to complete identity authentication. It is higher than the traditional "username + password" authentication method. The fingerprint identification device has outstanding advantages such as convenience, reliability and safety, and has been widely used in the fields of network security, smart phones, enterprise attendance and smart communities. [0003] Although the security level of fingerprint identification technology is relatively high, fingerprints may be stolen by illega...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose an optical fingerprint identification device with the function of living body identification, which can quickly identify living fingerprints and artificial fingerprints by measuring the size and change of the resistance between two points on the finger skin, so as to solve the problem that existing optical fingerprint identification devices cannot Identify the defects of live fingerprints and artificial fingerprints, fundamentally eliminate the problem of cloning fingerprint sleeves or simulated fingerprint films to deceive optical fingerprint recognition devices

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