Optimized micromirror arrays for adaptive optics

1999 ◽  
Author(s):  
M. Adrian Michalicek ◽  
John H. Comtois ◽  
Dale L. Hetherington
Keyword(s):  
Adaptive Optics ◽  
Micromirror Arrays

Tests on micromirror arrays for adaptive optics

2004 ◽  
Author(s):  
Jan Liesener ◽  
Werner J. Hupfer ◽  
Andreas Gehner ◽  
Kotska Wallace
Keyword(s):  
Adaptive Optics ◽  
Micromirror Arrays

Drift-Free Micromirror Arrays Made of Monocrystalline Silicon for Adaptive Optics Applications

2012 ◽  
Vol 21 (4) ◽  
pp. 959-970 ◽  
Author(s):  
Martin Lapisa ◽  
Fabian Zimmer ◽  
Göran Stemme ◽  
Andreas Gehner ◽  
Frank Niklaus
Keyword(s):  
Adaptive Optics ◽  
Monocrystalline Silicon ◽  
Micromirror Arrays

Accounting for mirror dynamics in optimal Adaptive Optics control

2009 ◽  
Author(s):  
Carlos Correia ◽  
Henri-Francois Raynaud ◽  
Caroline Kulcsar ◽  
Jean-Marc Conan
Keyword(s):  
Adaptive Optics

The Condition for Absolute Stability of an Electroelastic Actuator Control System for Nanomechatronics

2020 ◽  
Vol 10 (10) ◽  
pp. 52-58
Author(s):  
Sergey M. AFONIN ◽  
Keyword(s):  
Control System ◽  
Adaptive Optics ◽  
Absolute Stability ◽  
Deformation Characteristic ◽  
Straight Line Segment ◽  
Control Mechanisms ◽  
Relative Width ◽  
Random Inputs ◽  
Deformation Control ◽  
Actuator Control

An electroelastic actuator for nanomechatronics is used in nanotechnology, adaptive optics, microsurgery, microelectronics, and biomedicine to actuate or control mechanisms, systems based on the electroelastic effect, and to convert electrical signals into mechanical displacements and forces. In nanomechatronic systems, a piezoactuator is used in scanning microscopy, laser systems, in astronomy for precision alignment, for compensation of temperature, gravitational deformations and atmospheric turbulence, focusing, and stabilizing the image. In this study, a condition for absolute stability of an electroelastic actuator control system for nanomechatronics under deterministic and random inputs is obtained. A number of equilibrium positions in an electroelastic actuator mechatronic control system are found, the totality of which is represented by a straight line segment. The electroelastic actuator’s deformation control system dead band relative width is determined for the actuator’s symmetric and asymmetric hysteresis characteristics. Under deterministic inputs and with fulfilling the condition for the derivative of the nonlinear hysteresis actuator deformation characteristic, the set of equilibrium positions of the electroelastic actuator control system for nanomechatronics is absolutely stable. Under random inputs, the system absolute stability with respect to the mathematical expectations of the electroelastic actuator mechatronic control system equilibrium positions has been determined subject to fulfilling the condition on the derivative of the actuator hysteresis characteristic.

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