FIELD: physics.
SUBSTANCE: apparatus for inputting an identification feature for access monitoring and control means comprises an identifier in the form of a sealed metal or plastic capsule containing an electric power supply element of a reference optical radiation source, a reference optical radiation source which transmits a reference optical signal to the core of a photonic crystal waveguide with a hollow core, a photonic crystal waveguide which converts the spectrum of the reference optical signal, a quartz plate which protects the photonic crystal waveguide from moisture and contamination, wherein the spectrum converted by the photonic crystal waveguide passes as a unique identification code through the quartz plate and is detected by a reading device in a receiving chamber with a limiter, a collimator, an optical analyser with an interface module and is transmitted to a controller at an access point for comparison with a reference code.
EFFECT: high counterfeit protection and immunity to electromagnetic fields.
5 cl, 3 dwg
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Authors
Dates
2014-11-10—Published
2012-10-25—Filed