Shape control study of MEMS deformable mirror for adaptive optics in Indus-2 using piezo response function based TLBO algorithm

2020 ◽  
Author(s):  
Vikas Saroha ◽  
Sumit ◽  
Rahul Shukla ◽  
A. K. Srivastava ◽  
R. K. Sahu
Keyword(s):  
Adaptive Optics ◽  
Response Function ◽  
Shape Control ◽  
Deformable Mirror ◽  
Tlbo Algorithm ◽  
Control Study

scholarly journals Thermal Balance and Active Damping of a Piezoelectric Deformable Mirror for Adaptive Optics

Actuators ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 75 ◽  
Author(s):  
Kainan Wang ◽  
David Alaluf ◽  
André Preumont
Keyword(s):  
Adaptive Optics ◽  
Mass Production ◽  
Shape Control ◽  
Active Damping ◽  
Deformable Mirror ◽  
Vibration Modes ◽  
Back Side ◽  
Structural Damping ◽  
Front Side ◽  
Piezoelectric Unimorph

Piezoelectric unimorph deformable mirrors offer a cheap solution to adaptive optics, with mass production capability. However, standard solutions have significant drawbacks: (i) the static shape is sensitive to the temperature, and (ii) the low structural damping limits the control bandwidth, because of the interaction between the shape control and the vibration modes of the mirror. This paper discusses how these two problems may be alleviated by using a mirror covered with an array of actuators working in d31 mode on the back side and a ring of transducers (actuators and sensors) on the front side, outside the pupil of the mirror.

A New Design of Large Stroke Micro-Deformable Mirror Actuated by Electrostatic Repulsive Force

2008 ◽  
Author(s):  
Fangrong Hu ◽  
Jun Yao ◽  
Chuankai Qiu ◽  
Dajia Wang
Keyword(s):  
Electric Field ◽  
Resonant Frequency ◽  
Adaptive Optics ◽  
Bottom Electrode ◽  
Sacrificial Layer ◽  
Electrostatic Force ◽  
Repulsive Force ◽  
Deformable Mirror ◽  
Optical Aberrations ◽  
Out Of Plane

In this paper, a MEMS mirror actuated by an electrostatic repulsive force has been proposed and analyzed. The mirror consists of four U-shape springs, a fixed bottom electrode and a movable top electrode, there are many comb fingers on the edges of both electrodes. When the voltage is applied to the top and bottom electrodes, an asymmetric electric field is generated to the top movable fingers and springs, thus a net electrostatic force is produced to move the top plate out of plane. This designed micro-mirror is different from conventional MDM based on electrostatic-attractive-force, which is restricted by one-third thickness of the sacrificial layer for the pull-in phenomenon. The characteristic of this MDM has been analyzed, the result shows that the resonant frequency of the first mode is 8 kHz, and the stroke reaches 10μm at 200V, a MDM with large strokes can be realized for the application of adaptive optics in optical aberrations correction.

Adaptive Optics System Based on Combinational Deformable Mirror for Improving Wavefront Spatial Correction Capability

2009 ◽  
Vol 29 (3) ◽  
pp. 587-593
Author(s):  
杨华峰 Yang Huafeng ◽  
饶长辉 Rao Changhui ◽  
张雨东 Zhang Yudong ◽  
姜文汉 Jiang Wenhan
Keyword(s):  
Adaptive Optics ◽  
Deformable Mirror ◽  
Adaptive Optics System

Constraint Study on Deformable Mirror in Close-Loop Adaptive Optics System

2015 ◽  
Vol 35 (12) ◽  
pp. 1201002
Author(s):  
陈善球 Chen Shanqiu ◽  
刘文劲 Liu Wenjin ◽  
董理治 Dong Lizhi ◽  
王帅 Wang Shuai ◽  
杨平 Yang Ping ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Deformable Mirror ◽  
Adaptive Optics System

Adaptive optics reconstruction utilizing supersampled deformable mirror influence functions

1998 ◽  
Author(s):  
David C. Redding ◽  
Scott A. Basinger ◽  
Gary L. Brack ◽  
Richard G. Dekany ◽  
Ben R. Oppenheimer
Keyword(s):  
Adaptive Optics ◽  
Deformable Mirror ◽  
Influence Functions
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