METHOD OF PROCESSING DYNAMIC INTERFERENCE PATTERN IN LASER GYROSCOPE Russian patent published in 2020 - IPC G01C19/66 G01J9/02 

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment and method of processing dynamic interference pattern from output of optical mixer of ring laser gyroscope. Method includes focusing of a dynamic interference pattern with a lens in a given plane at the output of the optical channel with subsequent processing in a digital channel. In the digital channel, the dynamic state of the interference pattern is recorded using two photodetectors based on integral differential photodiodes, the photodetector regions of which form a bidirectional lateral transistor connected in a common base circuit. Differential photodiodes are located in a predetermined plane of the focusing lens at the output of the optical channel relative to the optical axis of the interference optical mixer without mutual adjustment relative to adjacent interference strips so that separation between adjacent strips of the interference pattern is ¼ of its pitch along the main operating wavelength.

EFFECT: technical result consists in reduction of effect of optical noise on resultant signal, removal of restrictions on mutual adjustment of photodiodes of photodetector and enabling control of sensitivity threshold of basic photodetector.

1 cl, 8 dwg