Device for optically measuring and/or testing oblong products

Details Device for optically measuring and/or testing oblong products Device for optically measuring and/or testing oblong products

G - Physics

01

B

G01B 11/10 (2006.01) G01N 21/952 (2006.01)

Patent

CA 2702785

The invention relates to a device for optically measuring and/or testing oblong products moving forward in the longitudinal direction thereof, said device having a plurality of cameras with focus-setting of the image, and a corresponding method. The invention is characterized in that the cameras have a fixed focus and, in order to set the focus, are displaced or moved toward the surface of the oblong product to be measured. Naturally, it is suitable for the cameras to be moved to the optimal distance from the object or product surface to be measured. The image scale and distortion errors are not changed in focus-setting, in contrast to an autofocus camera.

L'invention concerne un dispositif de mesure et/ou de contrôle optique de produits oblongs déplacés vers l'avant dans leur direction longitudinale, comprenant plusieurs caméras à mise au point de l'image. Elle concerne également un procédé correspondant. Selon l'invention, les caméras présentent une focale fixe et sont, pour la mise au point, coulissées ou déplacées en direction de la surface du produit oblong à mesurer. Ce faisant, les caméras sont bien sûr opportunément déplacées à la distance optimale de la surface de l'objet ou du produit à mesurer. À la différence du cas d'une caméra autofocus, l'échelle de reproduction et l'écart de distorsion ne sont ici pas modifiés lors de la mise au point.

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