Process for relative measurement of the center-line of an apertu

Details Process for relative measurement of the center-line of an apertu Process for relative measurement of the center-line of an apertu

1993-03-24

1995-01-03

Hille, Role

Optics: measuring and testing

Angle measuring or angular axial alignment

Sides of angle or axes being aligned transverse to optical...

356153, G01B 514, G01B 524

Patent

active

053791126

ABSTRACT:
This invention relates to a process for measurement of the relative positions of the center-lines of an aperture and of a cylindrical outline of a sample.
The process includes the following steps:
introducing a calibrated rod into said aperture;
performing measurements to define at least a pair of segments representative of the mid-points of the cylindrical outline and of a calibrated rod respectively.
The measurements are performed utilizing a light beam which is scanned parallel to the beam in a direction perpendicular to the center-line of the cylindrical outline. This enables measurement of the coaxiality and/or of the concentricity of the center-line of the outline and of the aperture.

REFERENCES:
patent: 4521112 (1985-06-01), Kuwabara et al.
patent: 4732486 (1988-03-01), Rinn
patent: 4968114 (1990-11-01), Thillays

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