Patent · US Active

Device and process for measuring the angle of rotation of two objects rotating in relation to each other

US9046388B2 · kind B2 · utility

1Cited by
5References
14Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 11, 2012
Grant dateJun 2, 2015
Priority date—
Expiry dateDec 29, 2032

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01D5/345
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Measurement of the rotating angle of two objects rotating in relation to each other is achieved with a transmitter assigned to one of the objects. The transmitter emits light that is either polarized or becomes polarized by means of a polarization filter, and with a polarization-sensitive polarizer such that the transmitter and the polarizer rotate relative to each other as dependent on the rotating angle. A receiver measures the luminosity of light passing through the polarizer in order to create a signal that is dependent on the rotating angle, and where the receiver has at least two receiver elements which detect light of differing polarization.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.