METHOD FOR DETERMINING THE DIRECTION OF ROTATION OF THE PLANE OF RADIATION POLARIZATION Russian patent published in 2023 - IPC G01J4/00 

FIELD: electromagnetic radiation parameters measuring.

SUBSTANCE: invention relates to the field of measuring the parameters of electromagnetic radiation and relates to a method for determining the direction of rotation of the plane of polarization. The method consists in that the investigated elliptically polarized radiation is supplied to the detector, at the input of which a polarizer is installed, and by rotating the detector with the polarizer, the direction of the major axis of the ellipse is determined. Next, the original stream is split into two beams, the first of which propagates along the original trajectory, and the second is passed through the phase shifter and the polarization plane rotator, both beams are fed to the mixer, and the resulting signal is recorded using a detector. By adjusting the phase shifter and the polarization plane rotator, the maximum signal appears on the detector. By detuning the phase shifter, the signal is reduced and, by rotating the polarization plane clockwise and counterclockwise, the signal is increased in both cases. By determining the direction of rotation corresponding to the most rapid growth of the signal, the direction of rotation of the plane of polarization is determined.

EFFECT: expanding the operating frequency range to the submillimeter region and simplifying the implementation of the method for determining the polarization sign.

1 cl, 3 dwg