Optics: measuring and testing – Inspection of flaws or impurities – Bore inspection
Patent
1976-06-01
1978-05-23
Corbin, John K.
Optics: measuring and testing
Inspection of flaws or impurities
Bore inspection
250202, 250223R, 356237, G01N 2148
Patent
active
040907945
ABSTRACT:
The device for the testing through optical inspection of the cigarette ends comprises two probes made of optical fibres, which probes are arranged orthogonally with respect to each other. A first probe inspects the end surface of the cigarette being tested by directing against the said end surface a beam of light, and picking up the light reflected, the intensity of which depends from the end surface itself and from the distance of said end surface with respect to the said first probe. A second probe inspects a portion of the side surface of the cigarette comprising also the end being tested, by directing against the side surface a beam of light which provides for an inspection field of which only one part is interested by the cigarette end, and picking up the light reflected by the said side surface, the intensity of which depends from the length of the portion of cigarette end which is covered by the field of inspection and which depends from the actual length of the cigarette or from its axial positioning with respect to the probes. The light reflected by the end surface and the light reflected by the side surface are transformed into electric signals, which are compared in algebraic relationship the one with the other, and the resulting signal is used as a measure for the testing of the cigarette end.
REFERENCES:
patent: 2840722 (1958-06-01), Frommer
patent: 3980567 (1976-09-01), Benini
Corbin John K.
Punter Wm. H.
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