Abstract: A lighting apparatus for use with line scan cameras in plants for detecting and recognizing objects in a flow of materials such as goods to be sorted, in which several separately controllable diodes and an optical device are provided, with the diodes being disposed at least in one row next to one another over the width of the respective section of the plant and the optical device regularizes the light emitted by the diodes in such a way that a secure detection of the objects and its properties such as material composition, color, size or the like is ensured by cameras. The optical device comprises two diffusers and an interposed lens.

Abstract: A tube conveyor, in particular a tube conveyor in which an endlessly revolving conveying belt is guided at least partly in the interior of carrier rolls (5) which are attached in a ring-shaped manner and whose axes extend substantially transversally to the direction of conveyance, and is substantially shaped into a tube, with the return of the conveying belt (3) being performed outside of the loaded strand shaped into a tube. In order to provide a tube conveyor which does not require any additional external supporting rolls for the return of the unloaded strand and thus both simplifies the installation of such a tube conveyor and reduces its noise production during operation, the return of the unloaded strand (9) of the conveying belt (3) is performed while resting on the upper carrier rolls (5) which are arranged in a ring-shaped manner.