Technique for optical alignment of a workpiece

Details Technique for optical alignment of a workpiece Technique for optical alignment of a workpiece

1980-09-22

1983-07-05

Rosenberger, R. A.

Optics: measuring and testing

Angle measuring or angular axial alignment

With screen

G01B 1126

Patent

active

043915205

ABSTRACT:
A technique for aligning a surface of a workpiece with respect to a positioning ring attached to a holder supporting the workpiece comprises mounting the holder on an alignment platform adjacent a positioning block attached thereto for holding the positioning ring in a predetermined position. The holder is adapted to rotate the workpiece, with respect to the positioning ring, about a first axis, and the alignment platform is supported by a table. The surface of the workpiece is exposed to an incident light beam, whereby the incident beam is reflected from the surface, as a reflected beam, onto a screen along a path of alignment marks disposed thereon. The surface is then rotated about the first axis to change the location where the reflected beam strikes the screen, whereby the surface is properly aligned with respect to the positioning ring when the reflected beam strikes a particular location on the screen.

REFERENCES:
patent: 1518786 (1924-12-01), Griswold
patent: 1736682 (1929-11-01), Tuckerman
patent: 2150398 (1939-03-01), Paulson
patent: 2347702 (1944-05-01), Maris
patent: 2656762 (1953-10-01), Carr
patent: 3485561 (1969-12-01), Ewald
patent: 3695767 (1972-10-01), George et al.
patent: 3951551 (1976-04-01), MacPherson

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