Patent ID: 7663764

Claim:
A measuring device for optical measuring of an object ( 13 a ), comprising: an interferometer ( 20 ) with a measuring beam exit ( 12 ), a reflection beam entry ( 14 ), an interference beam exit ( 15 ), and a light source ( 1 ) for creating a light beam ( 8 ), a beam splitter to split the light beam into first and second partial beams ( 9 , 10 ), with the first partial beam ( 9 ) which acts as a measuring beam exiting the measuring beam exit ( 12 ) essentially at a predetermined angle and the second partial beam ( 10 ) being interfered with a reflection beam entering through the reflection beam entry ( 14 ), and the second partial beam ( 10 ) exiting with the interfered reflection beam at the interference beam exit ( 15 ), an optic detector ( 16 ) arranged at the interference beam exit ( 15 ) of the interferometer ( 20 ) such that a light beam exiting the interfering beam exit ( 15 ) impinges the detector ( 16 ), a signal processing unit ( 17 ), which is connected to the detector ( 16 ) to collect and/or process measuring signals of the detector ( 16 ), a switched beam entry ( 18 ) that, depending on a switching signal connected to the switched beam entry ( 18 ), causes the first partial beam to exit the measuring beam exit ( 12 ) at a generally predetermined light intensity and at a predetermined angle, and the signal processing unit ( 17 ) is provided with a beam switching exit, which is connected to the beam switching entry ( 18 ) of the interferometer, the signal processing unit ( 17 ) controls the interferometer such that the first partial beam generally with the predetermined light intensity only exits the measuring beam exit ( 12 ) during a measuring of measuring signals for taking measurements and at the predetermined angle.