FIELD: physics, signalling.
SUBSTANCE: invention relates to identification methods. Proposed method consists in that two or more light sensitive identification marks are applied made on the base of light sensitive bacteriorhodopsin wherein introduced are substances affecting bacteriorhodopsin photo cycle parametres and vary, reversibly, mark colour depending upon illumination level. For this, substances that have different concentration of nanoparticles or different-nature nanoparticles are used and new absorption bands are produced in spectrum, or shift of characteristic peaks is produced, or bacteriorhodopsin photo cycle is changed. In authenticity control, light source light-sensitive elements are illuminated in specified wavelength range by various-intensity light and reversible mark colour change depending upon illumination level is registered.
EFFECT: higher reliability or protection and authenticity control.
2 cl
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