Multi-axis alignment apparatus

Details Multi-axis alignment apparatus Multi-axis alignment apparatus

1987-09-23

1989-02-14

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356363, G01B 902

Patent

active

048042706

ABSTRACT:
Apparatus for measuring the displacement of a member relative to a reference plane has a transmitter and a receiver spaced therefrom at a predetermined distance. A reference energy beam coaxially passes through a light diffraction grating having a ruled surface. The grating passes a zero order part of the beam through undeviated and diffracts a multiplicity of beams of first, second, third, and higher order, at constant angles with the zero order part, the angles varying with the frequency of the ruled surface of the grating. A coaxial sleeve movably mounts the light diffraction grating to provide a roll zero reference. The zero order part of the beam provides the zero reference for pitch and yaw and the first order beams provides zero reference for roll. The lines of the ruled surface of the grating have a frequency matching the predetermined distance. The receiver has a container movably mounted to provide a roll zero reference, a pitch and yaw displacement indicator in the container and a roll indicator in the container.

REFERENCES:
patent: 3269254 (1966-08-01), Cooper et al.
patent: 3375750 (1968-04-01), Ellis et al.
patent: 3701602 (1972-10-01), Bergin et al.
patent: 4277169 (1981-07-01), Krieg
patent: 4330212 (1982-05-01), Miller

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