SPECTROSCOPIC MEASURING DEVICE Russian patent published in 2017 - IPC G01J3/45 

FIELD: instrument making.

SUBSTANCE: invention relates to optical instrument-making and concerns spectroscopic measuring device. Device comprises dividing optical system for measured beam division onto first and second measured beams, image forming optical system for providing of first and second beams interference, means of optical path length difference continuous distribution between first and second beams, detector for interferential light intensity distribution detecting and processor for producing of interference pattern and performing Fourier transformation. Device also includes image forming optical system, arranged between measured object and dividing optical system so, that has common interconnected plane with dividing optical system. Besides, device comprises periodicity providing means, located on interconnected plane and intended for spatial periodic modulation of measured beams.

EFFECT: technical result consists in reduction of device dimensions and increasing of interferences resistance.

10 cl, 26 dwg