Device for controlling vibration-free movement of an optical ele

Details Device for controlling vibration-free movement of an optical ele Device for controlling vibration-free movement of an optical ele

1990-04-17

1991-04-16

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

360 7812, 244 1727, 280707, B64C 1706

Patent

active

050086065

ABSTRACT:
A carriage moves on a track and carries, through a flexible linkage, a chassis to which is fixed a payload including an optical element. A linear actuator controls the linkage so as to correct imperfections in displacement of the payload. A piezo-electric accelerometer delivers a filtered signal to control the linear actuator so as to eliminate the effect on the payload of vibration of the carriage. There are two independent control loops, one for controlling the carriage and the other for controlling the chassis. The device is applicable to controlling the mobile part of an optical delay line or of a telescope in a stellar interferometer.

REFERENCES:
patent: 3701499 (1972-10-01), Schubert et al.
patent: 4023906 (1977-05-01), Sica, Jr.
patent: 4505588 (1985-03-01), Ludman et al.
patent: 4626078 (1986-12-01), Chernin et al.
patent: 4715289 (1987-12-01), Okamoto et al.
patent: 4746143 (1988-05-01), Okamoto et al.
patent: 4765648 (1988-08-01), Mander et al.
patent: 4967293 (1990-10-01), Aruza et al.

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