Assembly for correction of distortions of a mirror

Details Assembly for correction of distortions of a mirror Assembly for correction of distortions of a mirror

1988-07-29

1989-10-24

Bovernick, Rodney B.

350487, 350607, G02B 718

Patent

active

048757640

ABSTRACT:
An assembly that can provide corrections of distortions of a mirror. The assembly uses the method of active optics to apply forces to the mirror to introduce deformations that cancel out the distortions. An important feature of the assembly is the employment of a force actuator which comprises a closed feedback loop that closes around the force actuator. An advantage of this novel feature is that, in response to a disturbance to the force actuator, the feedback loop can maintain a desired controlled force for application to the mirror.

REFERENCES:
patent: 4091274 (1978-05-01), Angelbeck et al.
patent: 4601553 (1986-07-01), Pepi et al.
patent: 4601554 (1986-07-01), Plante et al.
Pearson et al., "Active Optics Correction of Thermal Distortion of a 1.8 Meter Mirror", Optical Engineering, vol. 27, No. 2, Feb. 1988, pp. 115-122.
Henderson et al., "System Performance of a Large Deformable Mirror Using Differential Ball Screw Actuators", SPIE vol. 179 Adaptive Optical Components II, 1979, pp. 51-60.
Hardy, "Active Optics", Proceedings of the IEEE, vol. 66, No. 6, Jun. 1978, pp. 651-697.

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