Vibration isolator actuator for a segmented mirror

Details Vibration isolator actuator for a segmented mirror Vibration isolator actuator for a segmented mirror

1985-01-10

1986-07-22

Henry, Jon W.

350637, G02B 718

Patent

active

046015540

ABSTRACT:
A novel actuator for controlling the position of a mirror segment of a segmented mirror assembly and for isolating the segment from vibration is described, which comprises, a movable control member operatively interconnecting the segment and support structure for the mirror assembly; an actuator assembly, which may comprise an electrically controlled magnet and coil, operatively attached to the control member and responsive to an input signal, for moving the control member to selectively position the mirror segment relative to the support structure; a force amplifier connected to one or both ends of the control member for amplifying the force exerted on the control member, and which may be in the form of a pair of cooperating fluid filled bellows of different sizes coaxially disposed at one or both ends of the control member so that compression of the smaller bellows communicating with the larger bellows results in an amplification of the force imposed on the control member; a position sensor for sensing the position of the control member and providing a corresponding output signal; and programmable electronics for processing the output signal of the position sensor and providing the input signal to the actuator according to a preprogrammed scheme.

REFERENCES:
patent: 3154627 (1964-10-01), Wallis
patent: 3261016 (1966-07-01), Burr
patent: 3330958 (1967-07-01), Kaisler et al.
patent: 4402575 (1983-09-01), Jacobs
patent: 4492431 (1985-01-01), Eitel et al.
patent: 4500170 (1985-02-01), Montesanto
"Figure Control for a Fully Segmented Telescope Mirror", T. S. West and J. E. Nelson, J. App. Opt. 21 (14) pp. 2631-2641, (Jul. 15, 1982).

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