Optics: measuring and testing – Angle measuring or angular axial alignment
Patent
1985-10-18
1987-07-14
LaRoche, Eugene R.
Optics: measuring and testing
Angle measuring or angular axial alignment
356149, 356250, G01B 1126
Patent
active
046799370
ABSTRACT:
A transmitter for an alignment system in which a field of electromagnetic radiation is propagated in a non-planar reference cone is disclosed. The transmitter includes a source for providing a collimated beam of electromagnetic radiation directed parallel to a beam axis. A cantilever strand supports a bob within the beam. The bob has a conical reflecting surface to reflect the collimated beam conically. Optimally, the cantilever strand and bob are chosen to provide a deflection between the bob and plumb which is substantially one-half of any angular error between the beam axis and plumb. In an especially preferred form, a housing surrounds the bob and has inner and outer surfaces which minimize temperature effects on the orientation of the reference plane. Also, detectors are provided to sense when the angular error between the beam axis and plumb is outside of an acceptable range.
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Product Literature entitled "GKO-A The Rugged One", distributed by Kern Instruments, Inc., 111 Bowman Ave., Port Chester, N.Y. 10573, admitted prior art.
Cain Gary L.
Markley Theodore J.
Meyers Lawrence J.
Rando Joseph F.
Teach Ted L.
LaRoche Eugene R.
Mottola Steven J.
Spectra-Physics Inc.
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