Carl Zeiss Industrielle Messtechnik Gmbh

Philipp Jester

Aksel Goehnermeier

Frank Widulle

Michael Totzeck

Dominik Seitz

Oliver Schwarz

Dirk Doering

Christoph-Hilmar Graf Vom Hagen

Andreas Ebser

Andreas Moebius

Matthias Barnert

Rainer Schmidt

The invention relates to an apparatus and a method for determining a defocussing value (&#x394;z, &#x394;z, &#x394;z) for at least one image feature in an image, wherein at least one monochromatic image of an object is generated, wherein the defocussing value (&#x394;z, &#x394;z, &#x394;z) is determined on the basis of the image and depending on the wavelength (&#x3bb;) of the monochromatic image, and a method and apparatus for image-based determination of a dimensional size.

Method and apparatus for determining a defocusing valve and for image-based determination of a dimensional size

Coordinate measuring machine, comprising an optical sensor for capturing image data of a workpiece. The optical sensor comprises a lens, which defines an optical axis, and an illumination device for illuminating the workpiece. The illumination device comprises a diffusely radiating luminous body and an optical filter having a plurality of separate light passages. Light emitted by the luminous body enters the filter on an underside thereof, passes through the light passages and emerges again from the filter on an opposite top side thereof. Each of the light passages transmits only light rays that form an angle smaller than a predefined limiting angle with a longitudinal axis of the respective light passage. The lens and the filter are inclined relative to one another in such a way that a normal vector aligned perpendicularly to the top side of the filter forms an inclination angle other than&#xb0; with the optical axis.

Coordinate measuring machine having an improved optical sensing system and related method

A method and a measuring machine for determining dimensional properties of a measurement object each use a workpiece table and a camera having an image sensor and an imaging optics. The imaging optics exhibits aberrations and is configured to be focused on a plurality of different working positions relative to the workpiece table. The aberrations are minimized by using first calibration values provided for a defined working position. A first working distance of the camera relative to a region of interest is determined. Subsequently, the imaging optics is focused, using the first working distance and using second calibration values that represent an image field curvature of the camera, such that the region of interest is substantially brought into a defined working position. Subsequently, the image recording and image evaluation take place to determine measurement values that represent the dimensional properties of the measurement object in the region of interest.

Method and measuring machine for determining dimensional properties of a measurement object

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Heidenheim, Germany

Philipp Jester