INTERFERENCE MULTIBEAM LIGHT FILTER (VERSIONS) Russian patent published in 2013 - IPC G02B5/28 G01B9/02 

FIELD: physics.

SUBSTANCE: light filter has on a flat surface a planar optical waveguide and prisms for inputting and outputting radiation into the waveguide that are optically insulated from the waveguide by uniform air gaps or by a uniform thin layer of a transparent dielectric with a refraction index less than that of the prisms and the waveguide. In the first version, said surface is the totally-reflecting face of the radiation output prism and the totally-reflecting face of the radiation input prism, which occupies part of the face of the radiation output prism, is attached to the waveguide on top of the optically insulating layer, having a thickness smaller than that of the optically insulating layer under the waveguide. The second version employs the surface of a flat plate. The face of the radiation input prism adjacent to the waveguide is much smaller than the face of the radiation output prism adjacent to the waveguide and lies from the waveguide at a shorter optical distance than the face of the radiation output prism.

EFFECT: designing a light filter having high resolution, large dispersion region and high optical power.

4 cl, 4 dwg