Patent ID: 7312436
Filing Date: 2007-12-25
Classification: G01D

Abstract:
1. An optical position measuring system for generating position-dependent scanning signals, comprising: a measuring graduation; a scanning unit that is movable in relation to said measuring graduation in a measuring direction, said scanning unit comprises: wherein said opto-electronic detector arrangement has an axis of symmetry, which is oriented parallel with respect to said measuring direction, and wherein a first and a second one of said plurality of detector element units are arranged in a V-shape with respect to each other and mirror-symmetrically in relation to said axis of symmetry; and wherein said measuring graduation comprises an arrangement of graduation areas with different optical properties, which is periodic in said measuring direction and has a periodicity and which has been selected in such a way that through said arrangement of graduation areas at least a partial filtering of undesired harmonics out of said scanning signals results.