Patent ID: 8115933

Claim:
An interferometer for the optic measuring of an object ( 10 ), comprising a light source ( 1 ) with at least one beam splitter ( 2 ) and at least one detector ( 12 , 12 a , 12 b ), with the at least one beam splitter ( 2 ) being arranged in a beam path of the light source ( 1 ) such that a light beam created by the light source ( 1 ) is split into a working beam ( 3 , 3 a , 3 b ) and a reference beam ( 4 , 4 a , 4 b ), and the interferometer is arranged such that the working beam ( 3 , 3 a , 3 b ) impinges the object ( 10 ) to be measured and the working beam ( 3 , 3 a , 3 b ) is at least partially reflected by the object ( 10 ) and is interfered with the reference beam ( 4 , 4 a , 4 b ) on the detector, a spatial light modulator comprising a hologram control unit ( 9 ) and a hologram reconstruction unit ( 8 ) connected thereto are provided, with the hologram reconstruction unit ( 8 ) comprising a phase modulator device and being arranged in the beam path of the working beam ( 3 , 3 a , 3 b ) between the beam splitter ( 2 ) and the object, and the hologram control unit ( 9 ) controls the hologram reconstruction unit ( 8 ) so that the hologram reconstruction unit creates a generated hologram so the working beam ( 3 , 3 a , 3 b ) is at least one of deflected or split via the hologram reconstruction unit ( 8 ), so that a phase of the working beam is influenced by the hologram reconstruction unit ( 8 ), and the interferometer comprises a heterodyne interferometer, having a frequency shift unit ( 14 ) which is arranged in the beam path of at least one of the working beam or the reference beam and offsets a frequency of the working beam or the reference beam.