ANGULAR REFRACTOMETER Russian patent published in 2006 - IPC G01N21/41 G01W1/00 

FIELD: measuring technique.

SUBSTANCE: angular refractometer comprises two light sources with pulse radiation at different wavelengths of the reflector, angular compensator, receiving optical system, double electrooptic modulator whose modulation frequency is less than that of the light, light splitter for splitting the light beam into two beams, two light filters, two photodetectors, and three electric channels. The information channel includes differential amplifier, measuring circuit for generation of information signal, servomotor for automatic control of movable member of the angular compensator, and refraction angle recorder. The channel for adaptation to instrument and atmospheric interference has splitting electric circuit whose input is connected with the output of the differential amplifier and electric circuit for generation of signals of adaptation and switching on of the servomotor. Third electric channel for automatic sighting has electric circuit for comparing photocurrents from the different parts of the image and generation of the control signal whose input is connected with the output of one of the photodetectors and servomotor.

EFFECT: enhanced precision.

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