METHOD AND DEVICE MEASURING ANGLE OF TURN OF OBJECT Russian patent published in 1997 - IPC

FIELD: measurement technology. SUBSTANCE: method transforms rotary motion of object to translational one of reflectors of interferometer. In this case difference of code is changed by its increase in one branch and decrease in the other branch. Device measuring angle of turn of object includes optical disc with profile groove made along Archimedean spiral, guide, carriage mounted for reciprocating motion over guide, twin-wave interferometer, probe kinematically coupled with one end to carriage and with other end going into profile code of optical disc and photodetector. EFFECT: expanded range of measured angles. 4 cl, 1 dwg