G - Physics – 01 – N
Patent
G - Physics
01
N
340/123.2
G01N 21/89 (2006.01) G01N 21/892 (2006.01)
Patent
CA 1127259
Abstract Identification of subtle streaklike defects in running webs and sheets by transversely scanning adjacent lateral sections of the webs or sheets by means of radiant energy means. Transmitted or reflected radiation is received on corresponding photocells that produce measurement signals that are representative for a defect in the webs or sheets. The signal-to-noise ratio of the measurement signals is increased by multiplicative correlation, on the condition that ratio of the signal component Vd to the effective noise component Vn of the measurement signal Vm is greater than one.
336470
Burtin Jean
Geens Maurits
Agfa-Gevaert Naamloze Vennootschap
Borden Ladner Gervais Llp
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