METHOD FOR SPECTRAL FILTRATION OF RADIATION Russian patent published in 2007 - IPC G02B5/20 G02F1/315 

FIELD: optical tool-making industry, possible use for building devices for spectral filtration of optical radiations, for example, optical filters of adjustable wave length, monochromators.

SUBSTANCE: method includes selecting substances being in optical contact and forming interface with negative derivative of dependence of angle of full internal reflection and wave length in optical more dense environment and using two pairs of optical environments for filtration of radiation. During reflection of polychromatic beam from interface of environments with positive derivative of dependence of full internal reflection angle and wave length, spectral components with wave length greater than given threshold are removed from the beam, and during reflection of polychromatic beam from interface of environments with negative derivative of dependence of full internal reflection angle and wave length, spectral components with wave lengths less than given threshold are removed. Plane angle, within limits of which a beam of source radiation expands in plane, wherein optical axes of falling radiation beam and radiation beam being reflected from interface of environments are located, may be limited by calculated value, determined on basis of required spectral resolution.

EFFECT: production of adjustable band filter with controllable pass band.

3 cl, 5 dwg