Optical alignment for workpiece

Optics: measuring and testing – Angle measuring or angular axial alignment – With screen

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Details

356138, G01B 1126

Patent

active

045602743

ABSTRACT:
A method and apparatus for aligning a surface of a pyramidal-shaped workpiece (such as a stylus) with respect to a positioning ring attached to a holder supporting the workpiece. One surface of the workpiece (electrode of the stylus) is exposed to an incident light beam of large diameter so that only a portion of the incident beam is reflected from the surface onto a calibrated screen. A mirror reflects the remaining portion of the light beam back to the other two stylus surfaces to provide a pair of reflected beams onto the same screen. The workpiece is rotated to position the three reflections on the calibrated screen for comparison to a standard.

REFERENCES:
patent: 3582214 (1971-06-01), Loomis
patent: 3695767 (1972-10-01), George et al.
patent: 4335544 (1982-06-01), Manson
patent: 4391520 (1983-07-01), Ziegel

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