Results 301 to 310 of about 644,059 (323)

Testing and characterization of deformable mirrors

Adaptive Optics Systems VI, 2018
Deformable mirrors are at the heart of any adaptive optics system. We present the results of tests of deformable mirrors from Microscale. One of the key innovations of these deformable mirrors is that the facesheet is created from a silicon on insulator (SOI) wafer with integral posts for mechanical linkage to the actuators. This dramat- ically reduces
Yuqian Wu, Lewis C. Roberts, Camilo Mejia Prada, Li Yao, Seth R. Meeker, Xingtao Wu, J. Chris Shelton   +6 more
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Dynamic deformation of scanning mirrors

2000 IEEE/LEOS International Conference on Optical MEMS (Cat. No.00EX399), 2002
Summary form only given. MEMS mirrors are capable of scanning at frequencies greater than 34 kHz. Both diffraction and dynamic deformation are dependent on the mirror size; increasing the mirror length decreases diffraction, but increases dynamic deformation.
Robert A. Conant, Richard S. Muller, Kam-Yin Lau, J.T. Nee   +3 more
openaire   +2 more sources

Surface micromachined deformable mirrors

Proceedings 1996 IEEE Conference on Emerging Technologies and Factory Automation. ETFA '96, 2002
At Boston University, we have begun a project on surface-machined microactuators coordinated to achieve precision actuation and control of deformable mirrors for modulation of optical wavefronts. The mirror is supported on a massively parallel system of electrostatically-controlled, interconnected microactuators that can be coordinated to achieve ...
R. Krishnamoorthy, Thomas G. Bifano
openaire   +2 more sources

A deformable secondary mirror for the VLT

SPIE Proceedings, 2006
ESO has initiated in June 2004 a feasibility study to investigate the possibility to retro-fit one of the VLT 8 m telescope with a deformable secondary mirror (DSM). The scope of this effort has been broadened to a concept of Adaptive Optics Facility (adaptive telescope with adapted instrument park).
Armando Riccardi, Stefan Stroebele, Robin Arsenault, Ralf Conzelmann, Rob Donaldson, Michel Duchateau, Paolo Lazzarini, Roberto Biasi, Sylvain Oberti, Enrico Fedrigo, Daniele Gallieni, Norbert Hubin   +11 more
openaire   +2 more sources

Flexible femtosecond inscription of fiber Bragg gratings by an optimized deformable mirror.

Optics Letters, 2017
The period of fiber Bragg gratings is adapted by shaping the wavefronts of ultrashort laser pulses applied in a phase mask inscription technique. A specially designed deformable mirror, based on a dielectric substrate to withstand high peak powers, is ...
T. Goebel, C. Voigtländer, R. Krämer, D. Richter, Maximilian Heck, M. Siems, C. Matzdorf, C. Reinlein, M. Appelfelder, T. Schreiber, J. Thomas, A. Tünnermann, S. Nolte   +12 more
semanticscholar   +1 more source

MEMS deformable mirrors

Nature Photonics, 2011
Microelectromechanical systems (MEMS) technology has allowed the realization of cost-effective, high-performance deformable mirrors for adaptive-optics-enhanced imaging.
openaire   +2 more sources

Tiny Multilayer Deformable Mirrors

2006 International Workshop on Laser and Fiber-Optical Networks Modeling, 2006
Formation of the given laser beam intensity and phase is an important practical and scientific problem. Bimorph flexible mirror is one of the most widely used devices for this purpose. We present a new approach of multilayer bimorph mirrors and a numerical model to simulate them, based on the finite elements method.
Alexander S. Sobolev, Vadim Samarkin, A. V. Kudryashov, Tatiana Cherezova, Yulia Sheldakova   +4 more
openaire   +2 more sources

MEMS arrays for deformable mirrors

SPIE Proceedings, 1995
A new class of silicon-based deformable mirror for use in optical applications such as adaptive optical systems and optical correlators is being built. The mirror will be a massively parallel system of electrostatically controlled, interconnected microactuators that can be coordinated to achieve precise actuation and control at a macroscopic level. The
Thomas G. Bifano, R. Krishnamoorthy
openaire   +2 more sources

Shape memory composite deformable mirrors

SPIE Proceedings, 2009
This paper deals with some of the critical aspects regarding Shape Memory Composite (SMC) design: firstly some technological aspects concerning embedding technique and their efficiency secondarily the lack of useful numerical tools for this peculiar design.
RIVA, MARCO, BETTINI, PAOLO, DI LANDRO, LUCA ANGELO, SALA, GIUSEPPE   +3 more
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Congenital mirror hand deformity.

Genetic counseling (Geneva, Switzerland), 2012
Ulnar dimelia or commonly called mirror hand is a rare congenital anomaly of upper extremity characterized by duplication of ulna, absence of the radius with symmetrical polydactyly. This anomaly may be associated with shoulder dislocation, fibular dimelia, idiopathic scoliosis, cirrhosis, pyloric hypertrophy or polycystic kidney.
Arayici, S., Simsek, G. Kadioglu, Oncel, M. Y., Dilmen, U., Erdeve, O.   +4 more
openaire   +2 more sources