Patent ID: 8233153
Filing Date: 2012-07-31
Classification: G01B,G01S

Abstract:
1. Position detection system for contactless interferometic detection of a location of a target object, comprising a target object unit, and a measuring light transmitter unit with at least one measuring light transmitter from which a measuring light beam with coherent light is radiated onto the target object unit; wherein the location of the target object unit is determined using interferometric measuring data obtained from interference signals which are generated by a detector due to the interference of the measuring light beam with a reference light beam, which is coherent with the measuring light beam; the target object unit comprises a reference light transmitter, which is configured for transmitting the reference light beam with curved light wave fronts; the target object unit comprises at least one detector array having a plurality of detector pixels, the detector array being fixed to the target object unit for impinging the reference light beam of the reference light transmitter on the detection array, wherein