Abstract: An interferometric measuring device for measuring a measured object, in particular for thickness measurement of the measured object. A special-purpose objective having a mirror system is provided, which includes at least one first deflection mirror and one second deflection mirror and in which these are situated in such a way that the object beams incident on the first deflection mirror or on the second deflection mirror are directed respectively onto a first side or a second side, which is parallel thereto, of the measured object to be measured in a first beam path or a second beam path, respectively, which are antiparallel to one another. The mirror system additionally has at least one first position mirror for imaging the position of the measured object to be measured in relation to the first deflection mirror and/or the second deflection mirror.

Abstract: An optical measuring device for measuring a plurality of surfaces of an object to be measured using a system of optical elements. For example, the first surface to be measured can be the inner wall of a narrow guide bore, while the second surface to be measured is formed by a valve-seat section that is conical and positioned at one end of the guide bore. As optical elements of measuring device, at least one beam splitter and one lens system are disposed in such a way that a first portion of the light beams incident on the beam splitter is directed perpendicularly onto the first surface of the object to be measured, and a second portion of the light beams incident on the beam splitter strikes the lens system downstream of the beam splitter and is directed via the lens system perpendicularly onto the second surface.

Abstract: An interferometric measuring device for measuring a measured object, in particular for thickness measurement of the measured object. A special-purpose objective having a mirror system is provided, which includes at least one first deflection mirror and one second deflection mirror and in which these are situated in such a way that the object beams incident on the first deflection mirror or on the second deflection mirror are directed respectively onto a first side or a second side, which is parallel thereto, of the measured object to be measured in a first beam path or a second beam path, respectively, which are antiparallel to one another. The mirror system additionally has at least one first position mirror for imaging the position of the measured object to be measured in relation to the first deflection mirror and/or the second deflection mirror.

Abstract: An interferometric measuring device for the three-dimensional measurement of shapes on objects to be measured having a beam splitter receiving light from a light source via an input light path and splitting it into a measuring light path and a reference light path, having an image pick-up, to which light reflected back from the object to be measured and from a reference and brought into interference can be supplied via an output light path for conversion into electrical signals, having an evaluation unit for determining the surface shape from the signals and having an adaptation device for adapting the light intensity or the signals received from the interfering light.

Abstract: An optical measuring device for measuring curved surfaces of a measured object. The curved surface to be measured may at least partially have the internal or external shape of a conical or cylindrical surface or of a saddle surface. The measuring device has a system of optical elements which includes at least one lens system and a first deflection optics. The lens system and the first deflection optics are positioned so that a first part of the light beams incident on the lens system is directed perpendicularly onto the curved surfaces of the measured object via the first deflection optics, while a second part of the light beams incident on the lens system is directed onto a reference object. Simultaneous measurement of locations of the measured object which are difficult to access and a reference object is thus made possible.