Deformable mirror actuation system

Details Deformable mirror actuation system Deformable mirror actuation system

2006-01-24

2006-01-24

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S290000, C359S224200, C359S223100, C359S578000

Reexamination Certificate

active

06989922

ABSTRACT:
Mechanical control and actuation of an adaptive optical element provides highly stable and repeatable correction of the shape of an optical element to an accuracy of a small fraction of a very short wavelength of light, responsive to a metrology source and sensor arrangement. Actuators in the form of individual set-screws or other actuators capable of axially positioning a shaft are driven by a robotic screw driver with four degrees of freedom or one or more linear actuators to exert force on the mirror. Positive or negative force may be used for outward and/or inward deflection of the mirror. When a desired force is developed on the mirror through a mechanical linkage, the linkage may be clamped by a passive clamp which may be released by an actuator such that the adjustment is maintained while the linear actuator and the clamp actuator are turned off; yielding a highly stable adjustment while effectively removing sources of actuator drift, noise, vibration and heating which may adversely affect stability.

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Ealey et al.; “Deformable Mirrors: Design Fundamentals, Key Performance Specifications, and Parametric Trades”; SPIE vol. 1543 Active and Adaptive Optical Components, 1991; pp. 36-51.
Ealey: “Active and Adaptive Optical Components; The Technology and Future Trends”; SPIE vol. 1543 Active and Adaptive Optical Components, 1991; pp. 2-34.

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