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METHODS AND APPARATUSES FOR REFRACTIVE INDEX MEASUREMENT OF TRANSPARENT TUBE | VERFAHREN UND VORRICHTUNGEN ZUR BRECHUNGSINDEXMESSUNG EINES TRANSPARENTEN ROHRS | PROCÉDÉS ET APPAREILS DE MESURE D'INDICE DE RÉFRACTION D'UN TUBE TRANSPARENT

Patentnummer:EP3537100B1
IPC Hauptklasse:G01B001112
Anmelder:Mitutoyo Corporation (0)
20-1, Sakado 1-chome, ; Takatsu-ku, ; Kawasaki, Kanagawa 213-0012, JP
Erfinder:
Anmeldung:01.03.18
Offenlegung:01.03.18
Patenterteilung:05.08.20

Abstract / Hauptanspruch
In a method and apparatus for measuring a property of a transparent tubular object, a laser beam scans the object, and laser light originating from the object is detected in a first detection direction parallel to the laser beam direction, or in the first and in a second detection direction at an angle thereto, in particular at 90°. The refractive index of the object may be calculated from the scanning speed, said angle, and the outer diameter detected in the first detection direction, the time of detecting laser light refracted into the object and reflected at the inner surface thereof in the first detection direction and, in the second detection direction, the time difference between laser light reflected from the outer surface of the object and laser light refracted into the object and reflected at the inner surface thereof.

EP3537100B1


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