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US 2016/0103081 A1Published application
Method and device for optically inspecting faults
AssigneeViprotron GmbH
InventorAndreas SANDNER
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AssigneeViprotron GmbH
InventorAndreas SANDNER
Estimating the term…
In a method for optically checking a large-area three-dimensional object an illumination surface of parallel light beams is generated using a light source, a large-area three-dimensional object is partly or completely illuminated by the illumination surface, and a change of the parallel light beams of the illumination surface through the object is detected, wherein a projection surface is arranged on an object face opposite the light source, and the object shadow cast on the projection surface by the illumination surface is detected using an optical detection device. The strip-shaped light curtain is produced with a Fresnel lens. The shadow is detected using an optical lens system or a CCD camera. The dimensions of the object parallel to the projection surface are ascertained and compared with specified reference values. The projection surface is an opaque panel made of a translucent material or a surface-treated glass pane.
A method for optical fault inspection of an object, wherein an illumination surface is created from parallel light beams with a light source, wherein the object is at least partly illuminated by the illumination surface and wherein a change in the parallel light beams of the illumination surface the object is detected, wherein the light beams arriving from the illumination surface are projected onto a projection surface disposed behind the object and the shadow of the object cast on the projection surface by the illumination surface is detected with an optical detection device.
A device for optical inspection of an object, with a light source, with a device for producing an illumination surface of parallel light beams, and with an optical detection device for the detection of a change in the light beams coming from the illumination surface due to the object, wherein a projection surface is disposed at a distance from the illumination surface and the optical detection device is suitable to detecting the shadow of an object located in the path of the parallel light beams that is cast by the illumination surface on the projection surface.
Dependencies are inferred from the claim text.