Novel anti-snooping luminous warning optical PUF
An optical and warning technology, which is applied in the direction of record carriers, instruments, and computer components used in machines, can solve the problems of high safety performance of optical PUF and failure to prevent excitation-response equivalence, and achieve the effect of ensuring safety and simple preparation
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Embodiment 1
[0031] An anti-snooping light-emitting warning optical PUF with an excitation wavelength greater than 550nm.
[0032] In this example, Sr 2 Mg 2 SiO 7 : Eu, Dy as long afterglow luminescent anti-spy material. Its structural diagram is as figure 1 shown.
[0033] The optical PUF uses 250 micron thick quartz glass as the substrate. 5g Long Afterglow Sr 2 Mg 2 SiO 7 : Eu, Dy nanoparticles, mixed in 200g of TiO with a particle size of 200nm 2 In the nanoparticle dispersion liquid, the dispersion liquid fraction is 5%. Afterwards, the mixed dispersion liquid is sprayed on the quartz glass to form an optical PUF scattering medium with a thickness of 20-30 microns embedded with long afterglow materials. Finally, put this structure into a slidable opaque box to ensure that when the optical PUF is not excited, the box is in a closed state to prevent ambient light from irradiating the PUF and causing luminescence. Such as figure 2 As shown, it is the long afterglow luminesc...
Embodiment 2
[0035] An anti-cracking and anti-snooping light-emitting warning optical PUF for near-infrared light excitation.
[0036] Zn used in this example 3 Ga 2 Ge 2 o 10 : Cr 3+ As a long afterglow glow anti-spy material. Its structural diagram is as image 3 shown. The optical PUF uses a 160-micron-thick gem sheet as a substrate. 10g particle size is 2-5 micron long afterglow luminescent material Zn 3 Ga 2 Ge 2 o 10 : Cr 3+ Particles, mixed in 200g of ZnO particles with a particle size of 200nm 2 In the nanoparticle dispersion liquid, the dispersion liquid fraction is 2.5%. Afterwards, the mixed dispersion liquid is sprayed on the gemstone substrate to form an optical PUF scattering medium embedded with long afterglow materials with a thickness of 20-30 microns. Finally, put this structure into a slidable opaque box to ensure that when the optical PUF is not excited, the box is in a closed state to prevent sunlight or light from shining on the optical PUF to cause lumi...
Embodiment 3
[0038] An optical PUF for anti-spying light-emitting warning optical PUF based on long-lasting ceramic materials with near-infrared excitation wavelength, using Zn with a thickness of 160 microns 3 Ga 2 Ge 2 o 10 : Cr 3+ ceramics as the substrate. The substrate also has long afterglow luminous properties. The GaP nanoparticle dispersion with a volume fraction of 2.5% and a particle size of 200nm is sprayed on a substrate with long-lasting luminescent properties to form an optical PUF scattering medium with a thickness of 20-30 microns. Finally, put this structure into a slidable opaque box to ensure that when the optical PUF is not excited, the box is in a closed state to prevent sunlight or light from shining on the optical PUF to cause luminescence. Its structural diagram is as Figure 5 shown. The long afterglow luminescence spectral properties of the ceramic substrate material and Figure 4 Consistently, when the wavelength is greater than 650nm, it is a non-excita...
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