OPTICAL COMPOSITION Russian patent published in 2015 - IPC C08K3/00 F21S13/00 F21Y101/02 

FIELD: physics, optics.

SUBSTANCE: invention can be used in light engineering and optics when making illumination devices. The composition is intended as binder or for connecting optical elements and contains a silicate, alkyl silicate and/or alkyl polysiloxane as binding material and nanoparticles with average diameter of 100 nm or less in amount of 15-75% of the volume of the composition. The composition has a first refraction index (n₁) of at least 1.65 for light with a first wavelength of 350-500 nm and a second refraction index (n₂) of 1.60-2.2 for light with a second wavelength of 550-800 nm. The difference between (n₁) and (n₂) is at least equal to 0.03. The nanoparticles are selected from a group consisting of TiO₂, ZrO₂, Y₂O₃, ZrO₂, stabilised with Y₂O₃, HfO₂, Ta₂O₅, Nb₂O₅, TeO₂, BaTiO₃ and SiC. The illumination device (1) comprises a semiconductor lamellar structure (5), a ceramic element (7) and a connecting region (8) containing said composition.

EFFECT: improved light output.

13 cl, 7 dwg