MACHINE-READABLE OPTICAL PROTECTIVE APPARATUS Russian patent published in 2021 - IPC B42D25/382 

Abstract RU 2760808 C2

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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RU 2 760 808 C2

Authors

Gettens, Nancy, J.

Pearson, Nicholas, G.

Ziegler, Eric, M.

Dates

2021-11-30Published

2018-01-11Filed