DEVICE FOR MEASURING SMALL DISPLACEMENT OF OBJECT Russian patent published in 2007 - IPC G01B11/16 

FIELD: measuring technique.

SUBSTANCE: device comprises laser, three light-splitting prisms, and photodetecting unit. The light-splitting unit is made of the three light-splitting prisms mounted on the object so that the direction of three reflected laser beams are perpendicular to the initial direction of the laser beam. Two beams are oppositely directed and intersect the third beam at the right angle. The photodetecting unit is made of three unmovable two-coordinate photodetectors with high resolution arranged along the propagation of the reflected laser beam.

EFFECT: simplified structure and expanded functional capabilities.

1 dwg