Patent ID: 6940610
Filing Date: 2005-09-06
Classification: G02B

Abstract:
1. An optical measuring device ( 1 ) for measuring the shape of a rough surface of a test object (O), comprising: at least one light source (LQ), one illumination optics, one measuring optics, and at least one detection unit having a detection element, for generating a focus on the surface, for imaging the focus reflected from the surface using the measuring optics onto the detection unit, and for determining the intensity distribution of the imaged focus on the detection element, such that the intensity distribution is a function of the focus position of the measuring optics relative to the surface, and from the determination of one or a plurality of different intensity distributions, the position or shape of the observed surface area is able to be determined be way of a signal evaluation, wherein the measuring optics includes an optical probe for generating at least one intermediate image (ZW) of an observed surface area; wherein the at least one intermediate image (ZW) is generated in the object beam path; wherein an optical unit (OST), which is rigid in relation to the test object (O), is located in the object beam path, and is followed on the side distant from the test object (O) by an optical unit (OBW) which is movable in relation to the test object (O), in the direction of its optical axis; and wherein the at least one intermediate image (ZW), which is rigid in relation to the test object (O), is generated by the rigid optical unit (OST) normally to the optical axis, and the movable optical unit (OBW) is positioned in the reflected object beam behind the at least one intermediate image (ZW), and is configured to scan the at least one intermediate image (ZW).