Results 251 to 260 of about 21,299 (296)

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
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Thermal Deformations of Solid Mirrors

Applied Optics, 1970
The tensor equations of elasticity including temperature terms in nonorthogonal coordinates are presented in a form suitable for the method of dynamic relaxation. A nonorthogonal coordinate system that includes a wide class of circular solid mirrors or lenses is described.
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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 ...
T.G. Bifano, R. Krishnamoorthy
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Discrete Actuator Deformable Mirror

Optical Engineering, 1981
A discrete actuator deformable surface device, which provides as much as 12 pm of surface deformation using ±1 kV, has been developed at Itek. The discrete actuator device, made from bonded layers of piezoelectric discs, has been continuously exercised for a period of several hundred hours.
J. H. Everson, R. E. Aldrich, N. P. Albertinetti   +2 more
openaire   +1 more source

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.
Tatiana Cherezova, Alexander Sobolev, Alexey Kudryashov, Yulia Sheldakova, Vadim Samarkin   +4 more
openaire   +1 more source

Modeling large deformable mirrors

SPIE Proceedings, 2008
Planned Extremely Large Telescopes will rely oil availability of large Deformable Mirror in the 2-3m class. Design and construction of such mirrors are challenging and call for powerful simulation tools. We present an evaluation model which is used to study performance of a large deformable mirror for three: actuator topologies. Back sensors topologies
Rikard Heimsten, Torben Andersen, Mette Owner-Petersen   +2 more
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Magnetic Fluid Deformable Mirrors

2012
The number of new adaptive optics applications has soared during the last decade, demonstrating the need for low-cost, high-stroke deformable mirrors with a large number of actuators. Magnetic fluid deformable mirrors (MFDMs) were proposed a few years ago as an alternative to conventional membrane deformable mirrors used in wavefront correctors. Though
Zhizheng Wu, Azhar Iqbal, Foued Ben Amara   +2 more
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Micromachined silicon deformable mirror

SPIE Proceedings, 1998
A new silicon deformable mirror design is presented which provides high reflectivity, an optical quality continuous surface, and high intensity handling capacity. Its features make it useful for a wide range of devices including telescopes, leasers, and photolithographic systems.
Justin D. Mansell, Robert L. Byer
openaire   +1 more source

Segmented bimorph deformable mirror

Journal of Physics E: Scientific Instruments, 1989
The efficient low-voltage bending properties of PZT bimorph wafers have been combined with conventional microelectronics techniques to produce a 37-hex-faceted deformable mirror 23 mm in diameter and 1 mm thick. Despite the high ratio of diameter to thickness, at 633 nm an overall flatness of better than one-half wave peak-to-valley (PV) and one-tenth ...
F Forbes, F Roddier, G Poczulp, C Pinches, G Sweeny, R Dueck   +5 more
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Bistable Deformable Mirror Device

Spatial Light Modulators and Applications, 1988
The bistable DMD is the digital version of a class of reflective, micromechanical spatial light modulators (SLMs) known as deformable mirror devices (DMDs). In its earliest form the DMD was a hybrid SLM consisting of a metalized polymer mirror bonded to an underlying silicon address circuit[1,2].
Larry J. Hornbeck, William E. Nelson
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