Patent ID: 6943895

Claim:
An interferometric measuring device ( 1 ) for measuring the shape of a surface of an object (O) by means of white light interferometry, said interferometric measuring device ( 1 ) comprising a radiation source (LO) that emits short coherence radiation, a beam splitter (ST) arranged to cooperate with the radiation source (LQ) to produce an object beam (OS) and a reference beam (RS), said object beam (OS) being guided along an object light path to the object (O) and said reference beam (RS) being guided along a reference light path to a reflective reference plane (RSP), a fixed lens system (SO) arranged in the object light path and having a fixed relationship to the object (O), optical means for forming an intermediate image of the surface of the object, said optical means comprising said fixed lens system (SO), a movable lens system (BO) having an optical axis (ROA), wherein said movable lens system (BO) is followed in a direction of said optical axis (ROA) by said fixed lens system (SO) after reflection of said object beam (OS), and said movable lens system (BO) movable in said direction of said optical axis in order to perform a depth scan, an image recorder (BA) arranged to record radiation reflected by the object (O) and radiation reflected by the reflective reference plane (RSP) with image recording elements arranged next to each other on an extended planar surface thereof, said radiation reflected from the object and said radiation reflected from the reflective reference plane (RSP) being arranged to interfere with each other, said image recording elements consisting of pixels, and an evaluation device (E) connected to the image recorder (BA) to determine the surface shape from the interfering radiation received by the image recorder.