| 摘要 |
A device for optically measuring and/or testing oblong products moving in a longitudinal direction. The device includes a plurality of cameras arranged in a plane perpendicular to the longitudinal direction, and distributed around the longitudinal direction. Each of the cameras has a fixed focus. The device further includes a displacing device adapted to displace each of the cameras simultaneously and jointly over the same distance toward the surface of the oblong product to focus on the oblong product, wherein the device defines a center that is located in the plane.
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