Method for positioning a crystal ingot

Details Method for positioning a crystal ingot Method for positioning a crystal ingot

1987-01-23

1989-12-05

Rosenberger, Richard A.

Optics: measuring and testing

Crystal or gem examination

Axes determination

G01N 2100

Patent

active

048848875

ABSTRACT:
An apparatus is disclosed for use with a device for processing a crystal having crystallographic axes and crystallographic facets on its surface. A light beam is supplied towards the facets where the light beam has a selected spatial relationship to the device. The directions of reflections of the light beam from the facets are detected to determine the spatial relationship between one crystallographic axis and the processing device so that the body is processable using the device in reference to the crystallographic axis. A U-shaped member is placed with its open ends in contact with or adjacent to a reference surface of the processing device. The U-shaped member encloses and is urged against the body when the body is rotated about a reference direction of the device The U-shaped member is of such dimensions that the surface portions of the body at distances smaller than a predetermined distance will cause both ends of the member to contact the reference surface.

REFERENCES:
patent: 2423357 (1947-07-01), Watrodski
patent: 2858730 (1958-11-01), Hanson
patent: 3782836 (1974-01-01), Fey et al.

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