FIBRE-OPTIC DEVICE FOR MEASURING TRANSVERSE DEFORMATION VECTOR Russian patent published in 2010 - IPC G01B11/16 

FIELD: physics.

SUBSTANCE: fibre-optic device for measuring the value and direction of transverse deformation of an object is proposed. The device includes the following components which are arranged in series and optically connected to each other: a common optical source; several light guides with detecting elements and an optical receiver with an electronic processing unit. The light guides are connected into a cable containing three light guides attached to the object under analysis. The light guides are low-mode light guides. At the input faces of the light guides in the cable, there are steps at the centre of the light guides which provide optical path difference of λ/2, where λ is the wavelength, and which lie at an angle 120° to each other. In front of the faces of the light guides, there polarisation filters which direct the polarisation plane perpendicular the steps on the faces of the light guides. The optical receiver is made from separate elements, each optically connected to a separate light guide in the cable.

EFFECT: device enables measurement of the value and direction of transverse deformation of an object.

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