Results 21 to 30 of about 3,100 (213)

Optimization of electrode geometry and piezoelectric layer thickness of a deformable mirror

EPJ Web of Conferences, 2013
Deformable mirrors are the most commonly used wavefront correctors in adaptive optics systems. Nowadays, many applications of adaptive optics to astronomical telescopes, high power laser systems, and similar fast response optical devices require large ...
Nováková Kateřina, Kruchenko Alexey V., Mokrý Pavel   +2 more
doaj   +1 more source

A magnetic liquid deformable mirror for high stroke and low order axially symmetrical aberrations [PDF]

, 2006
We present a new class of magnetically shaped deformable liquid mirrors made of a magnetic liquid (ferrofluid). Deformable liquid mirrors offer advantages with respect to deformable solid mirrors: large deformations, low costs and the possibility of very
Anna Ritcey, Denis Brousseau, Ermanno F. Borra, Hubert Jean-Ruel, Jocelyn Parent   +4 more
core   +2 more sources

Suppressing low-order eigenmodes with local control for deformable mirrors [PDF]

, 2012
To improve the mechanical characteristics of actively controlled continuous faceplate deformable mirrors in adaptive optics, a strategy for reducing crosstalk between adjacent actuators and for suppressing low-order eigenmodes is proposed.
Andersen, Torben, Heimsten, Rikard, MacMynowski, Douglas G., Owner-Petersen, Mette, Ruppel, Thomas   +4 more
core   +1 more source

Active shape correction of a thin glass/plastic X-ray mirror [PDF]

, 2014
Optics for future X-ray telescopes will be characterized by very large aperture and focal length, and will be made of lightweight materials like glass or plastic in order to keep the total mass within acceptable limits. Optics based on thin slumped glass
Barbera, M., Basso, S., Cicero, U. Lo, Civitani, M., Collura, A., Dell'Agostino, S., Lullo, G., Pelliciari, C., Riva, M., Salmaso, B., Sciortino, L., Spiga, D.   +11 more
core   +2 more sources

Multiplexing control of a multichannel piezoelectric deformable mirror

SPIE Proceedings, 2005
ABSTRACT Addressing of massive arrays of piezoelectric actuators is usually achieved by using separate high-voltage output drivers, one per channel. This approach applied to high-order adaptive optics systems results in complex, expensive and vulnerable to handling abuse driver electronics, hardly scalable to 10 3 -10 4 actuators.
Song, H. (author), Simonov, A.N. (author), Vdovin, G. (author)   +2 more
openaire   +3 more sources

Optimized actuators for ultrathin deformable primary mirrors [PDF]

, 2015
A novel design and selection scheme for surface-parallel actuators for ultrathin, lightweight mirrors is presented. The actuation system consists of electrodes printed on a continuous layer of piezoelectric material bonded to an optical-quality substrate.
Laslandes, Marie, Patterson, Keith, Pellegrino, Sergio   +2 more
core   +1 more source

Ultralightweight deformable mirrors [PDF]

, 2013
This paper presents a concept for ultralightweight deformable mirrors, based on a thin substrate of optical surface quality, coated with continuous active layers that provide separate modes of actuation at different length scales. This concept eliminates
Patterson, Keith, Pellegrino, Sergio
core   +1 more source

Thin deformable mirrors for a reconfigurable space telescope [PDF]

, 2012
As part of a small satellite technology demonstration that will utilize autonomous assembly, reconfiguration, and docking technology to form the primary mirror for the mission’s telescope payload, the mirror segments are required to modify and control ...
Bely P., Born M., Chen Q., de Blonk B., Hickey G., Klein R., Kuo C.P., Patterson K., Pearson D.D., Rodrigues G., Romeo R.C.   +10 more
core   +1 more source

SPICA infrared coronagraph for the direct observation of exo-planets

, 2010
We present a MIR coronagraph to target the direct observation of extrasolar planets for SPICA, in which a coronagraph is currently regarded as an option of the focal plane instruments. The primary target of the SPICA coronagraph is the direct observation
Abe, Abe, Aime, Aime, Beichman, Bifano, Borucki, Burrows, Burrows, Cash, Charbonneau, Charbonneau, Deming, Deming, Dyson, Désert, Enya, Enya, Enya, Enya, Enya, Enya, Enya, Green, Guyon, Guyon, Harrington, Haze, Henry, Hodapp, Horner, Kalas, Kaneda, Kaneda, Kasdin, Kasdin, Keigo Enya, Kenyon, Lyot, Marois, Mayor, Mulvihill, Murakami, Murakami, Nakagawa, Nakagawa, Onaka, Onaka, Pluzhnik, Richardson, Soummer, Stewart, Sugita, Swain, Swain, Tamura, Tanaka, Tanaka, Tinetti, Toomey, Traub, Traub, Trauger, Vanderbei, Vanderbei, Vanderbei, Werner   +66 more
core   +1 more source

Piezoelectric deformable mirror driven by unimorph actuator arrays on multi-spatial layers

Optics Express, 2023
In order to reduce the cost of the piezo actuator array deformable mirror (DM), a piezoelectric DM driven by unimorph actuator arrays on multi-spatial layers is proposed. The actuator density can be multiplied by increasing the spatial layers of the actuator arrays.
Xiaoshuai Han, Jianqiang Ma, Kaiye Bao, Yuguo Cui, Jiaru Chu   +4 more
openaire   +2 more sources