Results 41 to 50 of about 644,059 (323)
The deformable mirror demonstration mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration [PDF]
Astronomical Telescopes + Instrumentation, 2018 Coronagraphs on future space telescopes will require precise wavefront correction to detect Earth-like exoplanets near their host stars. High-actuator count microelectromechanical system (MEMS) deformable mirrors provide wavefront control with low size ...
Gregory Allan +11 more
semanticscholar +1 more source
MEMS actuated deformable mirror [PDF]
SPIE Proceedings, 2006 This ongoing work concerns the creation of a deformable mirror by the integration of MEMS actuators with Nanolaminate foils through metal compression boning. These mirrors will use the advantages of these disparate technologies to achieve dense actuation of a high-quality, continuous mirror surface.
Papavasiliou, A. +4 more
openaire +2 more sources
Research on a Decoupling Algorithm for the Dual-Deformable-Mirrors Correction System
Applied Sciences, 2023 Wavefront distortion caused by atmospheric turbulence can be described as different types of aberrations, such as piston, tilt, defocusing, astigmatism, coma and so on.
Jingyuan Liang +3 more
doaj +1 more source
CIAO: An on-the-shelf adaptive optics system for astronomers [PDF]
EPJ Web of Conferences, 2023 Since 1990, adaptive optics are used in astronomy to remove the effects of atmospheric turbulence, and then retrieve diffraction-limited images, even in bad seeing conditions.
Dovillaire Guillaume, Leveder Cora
doaj +1 more source
Terahertz adaptive optics with a deformable mirror [PDF]
Optics Letters, 2018 We report on the wavefront correction of a terahertz (THz) beam using adaptive optics, which requires both a wavefront sensor that is able to sense the optical aberrations, as well as a wavefront corrector. The wavefront sensor relies on a direct 2D electro-optic imaging system composed of a ZnTe crystal and a CMOS camera.
Brossard, Mathilde +3 more
openaire +4 more sources
A Lorentz Force Actuated Continuous Deformable Polymer Mirror for Wavefront Control
Proceedings, 2017 This paper describes MEMS deformable polymer mirror system for adaptive optics application. This system employs a 4 µm thick SU-8 membrane with a stress balanced double side aluminum coating as a mirror element.
Byoungyoul Park +2 more
doaj +1 more source
Active Optics in Astronomy: Freeform Mirror for the MESSIER Telescope Proposal
Mathematical and Computational Applications, 2018 Active optics techniques in astronomy provide high imaging quality. This paper is dedicated to highly deformable active optics that can generate non-axisymmetric aspheric surfaces—or freeform surfaces—by use of a minimum number of actuators ...
Gerard Rene Lemaitre +2 more
doaj +1 more source
Sixty-Nine-Element Voice Coil Deformable Mirror for Visible Light Communication
Photonics, 2023 To overcome the atmospheric turbulence aberration, and improve the quality of light beam in visible light communication (VLC), a compact 69-element deformable mirror (DM) using micro voice coil actuators was designed based on systematic theoretical ...
Lv Jiang +6 more
doaj +1 more source
Deformable Mirrors developments at ESO [PDF]
, 2015 Already several deformable mirrors are in use at Paranal and more will come in the next years. With the next generation and telescope and associated instruments, adaptive optics become an integrated part of the telescope and provide as such the first layer of image correction.
Vernet, Elise, Stroebele, Sefan
openaire +3 more sources
Mode-Voltage Constrained Control for Adaptive Optics System
IEEE Photonics JournalIn the adaptive optics system of astronomical observation, the deformable mirror and the tip/tilt mirror are coupled during the correction process.
Ruitao Wang +7 more
doaj +1 more source