Patent ID: 6111402
Filing Date: 2000-08-29
Classification: G01D

Abstract:
A position measuring instrument comprising:a scale;a scanning element moving relative to said scale, said scanning element comprising:a first scanning track disposed within a first region, wherein said first scanning track comprises a sensor winding;a second scanning track disposed adjacent to said first scanning track within a second region, wherein said second scanning track comprises a second sensor winding that has a different periodicity than said first sensor winding;an electromagnetic field generator for generating a homogeneous electromagnetic exciting field within said first region and said second region that is directed toward said scale so as to scan said scale, wherein said electromagnetic field generator comprises an exciting element that comprises a first conductor track having a first current flowing therein and a second conductor track having a second current flowing therein and arranged parallel with respect to each other, wherein all conductor tracks of said exciting element have currents that flow in the same direction.