Device for acquiring images of a surface
AssigneeBST GmbH
InventorsFrank Böttcher, Peter Greve, Stefan Meinhardt, Klaus Reckefuss
Life of this patent
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Abstract
The invention relates to a device for acquiring images of a surface (12) with different spatial resolution, the device including a camera (16) having an optical system (18) that can be focused onto the surface, a mechanical system (20) which is designed to vary the distance between the camera (16) and the surface (12) and wherein the optical system (18) includes a liquid lens (26) having an electronically adjustable focal length.
Claims6
A machine for fabricating and/or processing a material web, the apparatus comprising a device for capturing images of a surface with different spatial resolutions, the device comprising:
- a camera having an optical system that can be focused onto the surface,
- a mechanical system which is designed to vary, by a linear motor, the distance between the camera and the surface,
- wherein the optical system comprises a liquid lens having an electronically adjustable focal length, and
- an electronic control device having a memory with stored predetermined values of different said focal lengths for different said distances, and configured for controlling the mechanical system to change the distance between the camera and the surface, and for transmitting to the liquid lens a voltage signal for adapting the focal length of the liquid lens to the respective position to which the camera is to be driven by the mechanical system according to the stored predetermined values.
Dependencies are inferred from the claim text.