DIFFRACTION PROTECTIVE ELEMENT WITH INBUILT OPTICAL WAVE CONDUCTOR Russian patent published in 2007 - IPC B42D15/00 G02B5/18 

FIELD: diffraction protective elements engineering.

SUBSTANCE: diffraction protective element contains optical wave conductor of transparent dielectric, integrated into cellular structure and positioned between illuminated transparent layer and protective layer. In wave conductor, transparent dielectric as even thickness of layer and its refraction coefficient is different from refraction coefficients of aforementioned adjacent plastic layers. Wave conductor on sections is adjacent to optically active structure, which, as main structure, contains refraction array of zero order with vector, period length ranging from 100 nanometers to 500 nanometers and depth of profile in range between 20 nanometers and 1 micrometer. Wave conductor has minimal length, at least, 10-20 lengths of refraction array period. Profile depth of optically active structure and thickness of transparent dielectric layer are in given relationship. Protective element when lit by white falling light generates diffracted light of zero diffraction order with high color intensity.

EFFECT: increased efficiency.

15 cl, 7 dwg