Patent ID: 7382470

Claim:
An interferometric measuring device for the three-dimensional measurement of a shape on an object to be measured, comprising: a beam splitter configured to receive light from a light source via an input light path and to split the light into a measuring light path and a reference light path; an image pick-up to which light, reflected back from the object to be measured and from a reference and brought into interference, is supplied via an output light path for conversion into electrical signals; an evaluation unit configured to determine a surface shape from the signals; and an adaptation device configured to adapt one of light intensity or signals received from the interfering light; wherein the measuring device is configured to measure planar regions of a surface of the object which extend over at least a lateral resolution of the measuring device and wherein the adaptation device is configured to adjust as a function of locally varying reflective properties of the surface with respect to measuring optics, at least one of the light intensity and signals obtained from the light.