Isra Surface Vision Gmbh

Rolf Kubiak

Christian Ripperda

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.

Method for determining a local refractive power and device therefor

A device for inspecting a material with a coated surface includes a light source disposed above the surface that emits light in a wavelength range, at least one first camera for determining a color value of detected light reflected from the surface and an evaluation device. The first camera is disposed above a line located on the surface and configured with a first aperture to detect light from a first point of the line at a first viewing angle and light from a second point separate from the first point at a second viewing angle. The first camera determines a first color value of the first point light and a second color value of the second point light and the evaluation device compares the first and second color values or a color value difference with a predefined color setpoint value or predefined color setpoint value range.

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Dortmund, Germany

Rolf Kubiak