Isra Surface Vision Gmbh

Christian Ripperda

Rolf Kubiak

Paul Weigt

The invention concerns an apparatus for determining a secondary image angle () of a light source () on a transparent object (). To achieve the objective of building a simple apparatus and to determine the secondary image angle () with higher measuring point densities even on transparent objects () with large surfaces in a quick, reliable manner with few movements, the apparatus includes an illuminating device (), which has multiple, simultaneously illuminating, punctiform light sources (), a two-dimensional target () with at least one camera (), whereby at least one camera () is set up to capture the positions of a primary image () and a secondary image () of multiple simultaneously illuminating light sources () at the same time, whereby the primary image () and the secondary image () of one light source () are generated on the target by one of the volume elements () of the transparent object illuminated by the light source (), and an evaluation device () is set up to determine the secondary image angle () of the respective volume element () of the transparent object () based on the positions of the primary image () and the secondary image (). Furthermore, a method for determining the secondary image angle is also specified.

Apparatus and method for determining a double image angle and/or a viewing angle

A method for determining a distortion of the image of an object formed by a reflection on a reflecting object includes capturing a reflected image of the reflecting object, determining, using the captured reflected image, a three-dimensional (3-D) shape of the surface of the reflecting object, calculating, based on the determined 3-D shape, distortion of the captured reflected image of the reflecting object from different viewing directions and using the calculated distortion from the different viewing directions, determining a three-dimensional (3-D) distortion of the surface of the reflecting object.

Method and device for determining a three-dimensional distortion

A method for determining a local refractive power in a volume element of a transparent object using a pattern includes observing the pattern through the transparent object by a first camera, determining, using the observed pattern, a three-dimensional (3-D) shape and position of a surface of a particular volume element of the transparent object facing the pattern and using the determined 3-D shape and surface position of the particular volume element, determining a local refractive power for the particular volume element.

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Cologne, Germany

Christian Ripperda