Patent ID: 7199355
Filing Date: 2007-04-03
Classification: G01D

Abstract:
1. A method for the accurate determination of an angle of rotation (w) by means of an optical detector ( 1 ) comprising a plurality of detector elements ( 2 ) arranged in series and by means of a rotating body ( 3 ) comprising a multiplicity of pattern elements ( 5 , ..., 13 ) which are arranged around a pattern center ( 4 ) and a multiplicity of which is arranged one behind the other in the direction of rotation, which rotating body ( 3 ) is connected to the detector ( 1 ) so as to be rotatable about an axis (a), in which method at least some of the pattern elements ( positions (p) of the focused pattern elements ( effects of an eccentricity (e) of the pattern center ( the angle of rotation (w) is accurately determined from resolved positions (p