Patent ID: 8891083

Claim:
A device ( 10 ) for measuring the rotating angle of two objects ( 11 , 12 ) comprising the two objects ( 11 , 12 ) which rotate relative to each other around a rotating axis (D), with precisely one transmitter ( 20 ), which is assigned to one of the objects ( 11 ) and which emits light that is either polarized or becomes polarized by means of a polarization filter, and with a polarizer ( 30 ), such that the transmitter ( 20 ) and the polarizer ( 30 ) rotate relative to each other as a function of the rotating angle, and such that the polarizer ( 30 ) has a polarizing area ( 31 ) and a non-polarizing area ( 32 ), where the non-polarizing area ( 32 ) is positioned eccentric to the rotating axis (D), and such that the device ( 10 ) has at least a first receptor ( 41 ) and a second receptor ( 42 ) which measure at least a portion of the luminosity passing through the polarizer ( 30 ) or reflected by the polarizer ( 30 ), in order to produce signals that are dependent on the rotating angle, and where the first receptor ( 41 ) has a first reception area ( 41 a ), and the second receptor ( 42 ) has a second reception area ( 42 a ) which is distinct from the first reception area ( 42 a ), wherein the receptors are positioned so as to produce a sine wave signal with maxima of different amplitudes but no phase shift.