Optical: systems and elements – Mirror – Including specified control or retention of the shape of a...
Reexamination Certificate
2005-01-11
2005-01-11
Phan, James (Department: 2872)
Optical: systems and elements
Mirror
Including specified control or retention of the shape of a...
C359S846000
Reexamination Certificate
active
06840638
ABSTRACT:
A combination of active and passive force actuators provide adjustments to the shape of an optical element to reduce or compensate for aberrations in an optical system. Passive actuators at a high spatial frequency are capable of correcting higher order steady state components of shape error while dynamic corrections of higher frequency, operationally dependent is provided allowing the number of active actuators and the power supplied to each active actuator to be reduced; reducing heating of the optical element by the active actuators and increasing stability of the system. Compound actuators including a combination of an active actuator portion with a passive actuator portion (which provides a mechanical force bias to the active actuator portion) allows increased spatial flexibility of application of forces to the optical element and other advantages.
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Ealey; “Active and Adaptive Optical Components; The Technology and Future Trends”; SPIE vol. 1543 Active and Adaptive Optical Components, 1991; pp. 2-34.
Ealey; “Actuators: Design Fundamentals, Key Performance Specifications, and Parametric Trades”; SPIE vol. 1543 Active and Adaptive Optical Components, 1991; pp. 346-362.
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.
Nikon Corporation
Phan James
Whitham Curtis & Christofferson, P.C.
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