INTERFEROMETER FOR DETERMINING REFLECTIVE INDEX OF INFRARED SURFACE ELECTROMAGNETIC WAVE Russian patent published in 2018 - IPC G01N21/45 

FIELD: physics.

SUBSTANCE: invention relates to the field of optical measurements and relates to an interferometer for determining the refractive index of an infrared surface electromagnetic wave (SEW). Interferometer contains: a source of collimated p-polarized monochromatic radiation, an element of the transformation of radiation into SEW, solid-state sample with a flat face, capable of directing SEW, SEW beam splitter, flat mirror, damper, photodetector array, located in the plane of the face, and an information processing device. Flat mirror adjoins its edge to the guide of the SEW face, is oriented perpendicular to it and crosses the track of the SEW. Divider is made in the form of a semitransparent plane-parallel plate, which adjoins its edge to the face of the specimen, oriented perpendicular to it and intersecting the track of the SEW. Damper allows one to alternately overlap the interfering secondary beams of the SEW.

EFFECT: technical result consists in simplified device and the procedure for processing the measurement results.

1 cl, 3 dwg