Toray Industries, Inc.

Kouichi Tamura

Katsuichi Kitagawa

A method for determining positions of points on a surface of an article including the steps of: detecting apparent positional information of the points from an image of the arrangement of the points; detecting a relative difference between the apparent positional information and predetermined positional information according to design data of the arrangement of the points; and modifying the apparent positional information by the relative difference, which modified information is transmitted to a subsequent system for positioning the point in place. By this, it is possible to inspect a plurality of apertures arranged with a predetermined relationship to each other, such as holes on a nozzle plate of a spinneret, in which apertures are sequentially positioned under a microscope according to positional signals generated based on the positional information obtained.

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Kudamatsu, Japan

Kouichi Tamura