DEVICE FOR TWIST ANGLE MEASUREMENT Russian patent published in 2012 - IPC G01B11/26 

FIELD: measurement equipment.

SUBSTANCE: invention may be used to align optoelectronic systems, assemble bulky devices, define parameters of shafts rigidity, measure remotely and transfer a twist angle value, etc. The device comprises a radiator installed on the object and on the optical axis of the device matching the axis of object rotation, a matrix photodetector and a joined calculating unit. On the object, along with the radiator beam direction, there is a mark shaper installed additionally to shape a mark in the form of a linear interference structure of high contrast confined in space between the shaper and the photodetector and lying in the plane perpendicular to the optical axis. The radiator is made in the form of a coherent source of radiation.

EFFECT: invention provides for high-accurate measurement with constant error as distance to an object changes within large limits without retuning (focusing, scale change), and also simplicity of manufacturing and using standard unified units.

2 dwg