Results 261 to 270 of about 5,726 (305)

Cooled deformable mirror

SPIE Proceedings, 1992
This technical paper describes a new unique form of deformable mirror that was engineered, designed, and built at Hughes Danbury Optical Systems. This paper discusses the current state of the art, the requirements, configuration, and special features such as the choice of materials for the mirror, interchangeable actuators, cooling technique and ...
David Kittell, Carlo La Fiandra
openaire   +1 more source

Composite Deformable Mirror

SPIE Proceedings, 1989
A mathematical model for a spherical hexagon mirror is described along with the model verifications. A flat hexagon epoxy mirror with aluminum core is used in test procedures in addition to a flat aluminum honeycomb mirror. Deformable reflector concepts are discussed and piezoelectric actuators are analyzed.
C. P. Kuo, B. K. Wada
openaire   +1 more source

Continuously Deformable Mirrors

SPIE Proceedings, 1987
Low spatial and temporal frequency correction of optical wavefronts can be achieved with continuously deformable mirrors that are being developed by the Atomic Vapor Laser Isotope Separation (AVLIS) Program at Lawrence Livermore National Laboratory. These devices are simple in design, low in cost, require relatively few actuators, and are capable of ...
Richard H. Sawicki, William Sweatt
openaire   +1 more source

Dynamic response of ferrofluidic deformable mirrors

Applied Optics, 2008
Ferrofluids can be used to make deformable mirrors having highly interesting characteristics (e.g., extremely large strokes and low costs). Until recently, such mirrors were thought to be restricted to corrections of frequencies lower than 10 Hz, thus limiting their usefulness.
Jocelyn, Parent, Ermanno F, Borra, Denis, Brousseau, Anna M, Ritcey, Jean-Philippe, Déry, Simon, Thibault   +5 more
openaire   +2 more sources

Thermomechanical characterization of a membrane deformable mirror

Applied Optics, 2008
A membrane deformable mirror has been investigated for its potential use in high-energy laser systems. Experiments were performed in which the deformable mirror was heated with a 1 kW incandescent lamp and the thermal profile, the wavefront aberrations, and the mechanical displacement of the membrane were measured.
Kathleen A, Morse, Stuart L, McHugh, Jeff, Fixler   +2 more
openaire   +2 more sources

Deformable primary mirror for a space telescope

Applied Optics, 1982
A 4-m aperture deformable primary mirror has been designed with the mirror and its supports integrated into a single structure. The integrated active mirror's minimal weight makes it desirable for a space telescope as well as a terrestrial application.
J G, Hansen, R M, Richard, R R, Shannon
openaire   +2 more sources

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

Pulse compression by use of deformable mirrors

Optics Letters, 1999
An electrostatically deformable, gold-coated, silicon nitride membrane mirror was used as a phase modulator to compress pulses from 92 to 15 fs. Both an iterative genetic algorithm and single-step dispersion compensation based on frequency-resolved optical gating calibration of the mirror were used to compress pulses to within 10% of the transform ...
E, Zeek, K, Maginnis, S, Backus, U, Russek, M, Murnane, G, Mourou, H, Kapteyn, G, Vdovin   +7 more
openaire   +2 more sources

Push-pull electrostatic deformable mirrors

SPIE Proceedings, 2008
Deformable membrane mirrors have a lot of advantages if compared with other adaptive optics devices such as bimorph mirrors, liquid crystal modulators, and thermal mirrors. Their properties are good optical power, low cost, limited power consumption, achromaticity and a good dynamic behavior. Their use in technological applications is limited by the
S Bonora, F Frassetto, G Naletto, L Poletto   +3 more
openaire   +4 more sources

Deformable mirror using the PMN electrostrictor

Applied Optics, 1981
A simple deformable bimorphous mirror using the PMN electrostrictor has been made for refocusing a light beam. Parabolic deformation of the mirror has been measured by an interferometric technique on a cycle with rising and falling electric fields. In comparison with the hard PZT piezostrictor, the electrostrictor is found to be promising for practical
K, Uchino, Y, Tsuchiya, S, Nomura, T, Sato, H, Ishikawa, O, Ikeda   +5 more
openaire   +2 more sources