False-proof element and manufacturing method thereof, safe article, and article detection method and device

Abstract

The invention discloses a false-proof element and a manufacturing method thereof, a safe article, and an article detection method and device. The false-proof element includes at least one kind of optical fragment; the emission spectrum of the optical fragment is A under the irradiation of a special laser; and the optical fragment continuously emits light in a preset time period after the laser is turned off, and the emission spectrum of the optical fragment is B during continuous light emitting, wherein the emission peak wave length of the emission spectrum B is not within a spectrum range of the emission spectrum A. The provided false-proof element includes a kind of light emitting fragment, fluorescence emitted by the light emitting fragment while the light emitting fragment is excited and phosphorescence emitted by the light emitting fragment after excitation stops have different light emitting peaks of different wavelengths. Through on-off of excitation light, the element generates a light change effect on the basis of a time domain, continuous change of various fluorescence colors can be achieved, and different light emitting materials can be selected as needed according to the wavelength.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting elements, in particular to an anti-counterfeiting element, a manufacturing method thereof, a security article, an article detection method and a device. Background technique [0002] Fluorescent materials are compounds that emit detectable radiation when excited by an external energy source. Many kinds of fluorescent materials have been widely used in valuable documents. The materials are invisible under ordinary light, and can emit fluorescence of different wavelengths under the irradiation of excitation light. Fluorescent materials can be detected by means of equipment such as spectrometers, which have a light source capable of exciting the material used, and a fluorescent signal receiver. However, the fluorescent material itself cannot produce light-changing effects, and its detection equipment only scans for the frequency domain space. [0003] Optically variable anti-counterfeiting techno...

AI Technical Summary

Problems solved by technology

However, the fluorescent material itself cannot produce light-changing effects, and its detection equipment only scans for the frequency domain space.

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