G - Physics – 01 – B
Patent
G - Physics
01
B
341/46, 340/123.
G01B 11/04 (2006.01) A24C 5/14 (2006.01) A24C 5/34 (2006.01) G01B 11/10 (2006.01) G01N 21/952 (2006.01)
Patent
CA 1038470
ABSTRACT OF THE DISCLOSURE The invention is concerned with an optical inspection apparatus for monitoring a continuously moving rod, such as a tobacco rod. The apparatus comprises a circular head through which the rod passes, a first set of fibre optic conductors the ends of which terminate at an inner peripheral surface of the head and which transmits light from a source to the head to illuminate the rod passing through the head, and a second set of fibre optic conductors the ends of which also terminate at an inner surface of the head to pick up light reflected from the rod passing through the head and transmit that light to a photosensitive element. The second set of conductors are divided into angularly spaced groups around the head and adjacent groups lead to separate photosensitive elements the outputs of which are fed into separate channels connected to a comparator which a response to the signal level in the individual channels and which produces a fault signal if the signal level in any one channel is greater than a preset allowable level. Preferably the light picked up by diametrically opposite pairs of groups are combined.
298953
Mcloughlin Robert W.
Nuttall Colin P.
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