FIELD: optical apparatuses.
SUBSTANCE: provided is an IR and/or UV machine-readable optical protective apparatus formed from at least one IR-absorbing component with a characteristic IR feature detected at two or more IR wavelengths, at least one UV-absorbing component with a characteristic UV feature detected at two or more UV wavelengths, at least one IR-absorbing component absorbing IR light and emitting light with another invisible wavelength, at least one UV-absorbing component absorbing UV light and emitting light with another invisible wavelength, or a combination thereof.
EFFECT: IR and UV machine-readable features do not create interference for optical effects projected by the optical material.
15 cl, 8 dwg
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