Method and apparatus for controlling the reciprocating translati

Details Method and apparatus for controlling the reciprocating translati Method and apparatus for controlling the reciprocating translati

1994-02-25

1995-12-05

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356346, G01B 902

Patent

active

054734290

ABSTRACT:
The method and apparatus effect reversal of a body moving at constant velocity, such as an interferometer reflector, by applying a retrograde electromagnetic force that varies in direct proportion to the distance the body has travelled past the point at which turn around is commenced. Circuitry employed is switched between proportional and integral control configurations, the latter permitting sine-wave oscillation to occur in a servo control loop during reversal.

REFERENCES:
patent: 4413908 (1983-11-01), Abrams et al.
patent: 5164788 (1992-11-01), Yoshikawa

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