OPTICAL DEVICE Russian patent published in 2023 - IPC G02B1/118 G02B1/12 B82Y20/00 

FIELD: optical devices.

SUBSTANCE: optical device suitable for transmitting/reflecting electromagnetic radiation in the wavelength range of the electromagnetic spectrum, said device comprising at least one substrate made of the first material, one coating layer made of the second material that differs from the first material, and a surface a texture that forms cavities in the device, the cavities extend through the coating layer and are partially embedded in the substrate. The device contains at least one back layer made of a material that differs from the substrate material and from the coating material, and the coating is made on the first side of the substrate, while the back layer is made on the second side of the substrate opposite the first side.

EFFECT: improved transmission in a larger range of wavelengths.

15 cl, 37 dwg