Seh America, Inc.

Mike W Mayer

Barton V White

Leo N Altukoff

A calibration method and a calibration device for two-point cold calibration are suitable for calibration of any visual measuring system having a width analyzer. In particular, the method and the calibration device are used to calibrate a CCD camera in a visual measuring system used to monitor the diameter of a crystal rod being grown by a crystal growing apparatus using the well-known Czochralski process. The calibration method takes into account non-linear error and avoids the need to actually grow crystals for calibration. The calibration device is specifically designed for quick and accurate set-up.

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Woodland, WA, United States of America

Mike W Mayer