Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-10-26
1987-02-24
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
209536, G01N 904, G06M 700, H01J 4014
Patent
active
046459219
ABSTRACT:
Apparatus for optically scanning a moving cigarette rod for the presence of defects in its external surface has two annularly arranged groups of diodes which emit green light in the wavelength range of between 0.49 and 0.58.mu. and direct such light from the opposite sides of a plane that is normal to the moving rod so that the incident light is reflected by successive annular portions of the external surface of the rod into the aforementioned plane. The reflected light is focused by systems of lenses upon discrete photosensitive transducers through discrete slit diaphragms on the transducers themselves or on a thin metallic ring which is adjustably mounted on the support for the diodes and the systems of lenses.
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Heitmann Uwe
Kohler Elke
Maiwald Berthold
Marsau Uwe
Pinck Peter
Hauni-Werke Korber & Co. KG.
Kontler Peter K.
Oen William L.
Westin Edward P.
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