DEVICE CHECKING SMALL ANGULAR DISPLACEMENTS Russian patent published in 1998 - IPC

FIELD: measurement technology. SUBSTANCE: device has source of coherent radiation, mechanical converter, optical unit composed of reflectors and beam splitter and monitor. Mechanical converter is made in the form of belt transmission composed of driving wheel which rotation axis is coupled to object and even number of driven discs which rotation axes are equally spaced along circumference coaxial to driving wheel. One reflector and beam splitter is mounted on each driven disc. Every even one of them is mounted for interaction with driving wheel with the aid of driving belt. Every odd disc is mounted in position of direct contact with driving wheel via driving belt. Linear displacement of light spots in plane of monitor is considerably increased due to multiple re-reflection of light beam which results in enhanced accuracy of check. EFFECT: enhanced accuracy of check. 2 dwg