Pair-wise, deformable mirror, image plane-based diversity electric field estimation for high contrast coronagraphy

2011 ◽  
Author(s):  
Amir Give'on ◽  
Brian D. Kern ◽  
Stuart Shaklan
Keyword(s):  
Electric Field ◽  
Image Plane ◽  
Mirror Image ◽  
Deformable Mirror ◽  
High Contrast ◽  
Field Estimation

Electric field reconstruction in the image plane of a high-contrast coronagraph using a set of pinholes around the Lyot plane

2012 ◽  
Author(s):  
Amir Give'on ◽  
Stuart Shaklan ◽  
Brian Kern ◽  
Charley Noecker ◽  
Steve Kendrick ◽  
...  
Keyword(s):  
Electric Field ◽  
Image Plane ◽  
High Contrast ◽  
Field Reconstruction

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.

Technological progress of a ferrofluid deformable mirror with tunable nominal optical power for high-contrast imaging

2015 ◽  
Author(s):  
Aaron J. Lemmer ◽  
Tyler D. Groff ◽  
N. Jeremy Kasdin ◽  
Daniel Echeverri ◽  
Isabel R. Cleff
Keyword(s):  
Technological Progress ◽  
Optical Power ◽  
Deformable Mirror ◽  
High Contrast ◽  
Contrast Imaging ◽  
High Contrast Imaging

Novel Electric Responsive Columnar Liquid Crystals based on Perylene Tetra sec-alkyl Ester Derivatives

2013 ◽  
Vol 66 (6) ◽  
pp. 692 ◽  
Author(s):  
Lei Wang ◽  
Qing Cui ◽  
Xiao-Fang Chen ◽  
Yang Li ◽  
Zheng-Qiang Li ◽  
...  
Keyword(s):  
Electric Field ◽  
Molecular Orbital ◽  
Indium Tin Oxide ◽  
Photophysical Properties ◽  
Mixed Solvents ◽  
Fluorescence Emission ◽  
Emission Spectra ◽  
Mirror Image ◽  
Alkyl Ester ◽  
Fluorescence Emission Spectra

A series of novel perylene tetra sec-alkyl ester compounds were successfully designed and synthesised. The photophysical properties were investigated and the UV absorption and fluorescence emission spectra displayed a mirror-image relationship. The compound PS8 showed the highest fluorescent quantum yield, while the fluorescence of PS8 was quenched in the aggregated state in mixed solvents. Moreover, the electrochemical properties of the perylene derivatives were studied to determine the molecules’ highest occupied molecular orbital and lowest unoccupied molecular orbital levels by cyclic voltammetry. The most important result was that PS8 exhibited a columnar phase at room temperature and was responsive to an electric field. PS8 could perpendicularly orient to an applied electric field. In addition, highly oriented face-on alignment was achieved on indium tin oxide-covered glass by thermal annealing.

Internal Electric Field Estimation, Charge Transport and Detector Performance of As-Grown ${\rm Cd}_{0.9}{\rm Zn}_{0.1}{\rm Te:In}$ by THM

2011 ◽  
Vol 58 (4) ◽  
pp. 1949-1952 ◽  
Author(s):  
Utpal Narayan Roy ◽  
Stephen Weiler ◽  
Juergen Stein ◽  
Michael Groza ◽  
Vladimir Buliga ◽  
...  
Keyword(s):  
Electric Field ◽  
Charge Transport ◽  
Internal Electric Field ◽  
Detector Performance ◽  
Field Estimation

Electric field estimation in deep transcranial magnetic stimulation

2015 ◽  
Vol 8 (2) ◽  
pp. 327 ◽  
Author(s):  
V. Guadagnin ◽  
M. Parazzini ◽  
S. Fiocchi ◽  
I. Liorni ◽  
Y. Roth ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Electric Field ◽  
Magnetic Stimulation ◽  
Field Estimation
Sign in / Sign up

Export Citation Format

Share Document