Results 11 to 20 of about 3,100 (213)

Analysis of a discrete-layout bimorph disk elements piezoelectric deformable mirror [PDF]

Journal of Astronomical Telescopes, Instruments, and Systems, 2018
We introduce a discrete-layout bimorph disk elements piezoelectric deformable mirror (DBDEPDM), driven by the circular flexural-mode piezoelectric actuators. We formulated an electromechanical model for analyzing the performance of the new deformable mirror. As a numerical example, a 21-actuators DBDEPDM with an aperture of 165 mm was modeled.
Wang, Hairen, Chen, Ziguang, Yang, Shengfeng, Hu, Lin, Hu, Ming   +4 more
openaire   +3 more sources

An active piezoelectric plane X-ray focusing mirror with a linearly changing thickness [PDF]

Journal of Synchrotron Radiation
X-ray mirrors for synchrotron radiation are often bent into a curved figure and work under grazing-incidence conditions due to the strong penetrating nature of X-rays to most materials.
Naxi Tian, Hui Jiang, Jianan Xie, Shuai Yan, Dongxu Liang, Zhisen Jiang   +5 more
doaj   +2 more sources

Thermal deformation compensation scheme to the sub-nanometre level of a piezoelectric offset mirror for MHz repetition rate free-electron laser [PDF]

Journal of Synchrotron Radiation
Free-electron laser (FEL) facilities operating at MHz repetition rates can emit lasers with average powers reaching hundreds of watts. Partial absorption of this power induces thermal deformation of a few micrometres on the mirror surface.
Baoning Sun, Qinming Li, Chuan Yang, Kai Hu, Zhongmin Xu, Xiaohao Dong, Weiqing Zhang, Xueming Yang   +7 more
doaj   +2 more sources

Ultrathin monolithic bimorph mirror using polarization-inverted lithium niobate wafer [PDF]

Scientific Reports
Deformable mirrors (DMs) serve diverse applications and have been adopted in X-ray optics recently. DMs are being used in various X-ray optical systems with variable parameters, with piezoelectric bimorph mirrors favored the most.
Takato Inoue, Junya Yoshimizu, Toma Ueyama, Maaya Kano, Yoshiki Kohmura, Makina Yabashi, Satoshi Matsuyama   +6 more
doaj   +2 more sources

Design and Simulation of a 19-Electrode MEMS Piezoelectric Thin-Film Micro-Deformable Mirror for Ophthalmology [PDF]

Micromachines
This study presents a numerical simulation-based investigation of a MEMS (micro-electromechanical systems)technology-based deformable mirror employing a piezoelectric film for fundus examination in adaptive optics.
Yisen Hu, Hongbo Yin, Maoying Li, Tianyu Bai, Liang He, Zhimin Hu, Yuanlin Xia, Zhuqing Wang   +7 more
doaj   +2 more sources

Picometre-level surface control of a closed-loop, adaptive X-ray mirror with integrated real-time interferometric feedback [PDF]

Journal of Synchrotron Radiation
We provide a technical description and experimental results of the practical development and offline testing of an innovative, closed-loop, adaptive mirror system capable of making rapid, precise and ultra-stable changes in the size and shape of ...
Ioana-Theodora Nistea, Simon G. Alcock, Andrew Foster, Vivek Badami, Riccardo Signorato, Matteo Fusco   +5 more
doaj   +2 more sources

Scalable stacked array piezoelectric deformable mirror for astronomy and laser processing applications [PDF]

Review of Scientific Instruments, 2014
A prototype of a scalable and potentially low-cost stacked array piezoelectric deformable mirror (SA-PDM) with 35 active elements is presented in this paper. This prototype is characterized by a 2 μm maximum actuator stroke, a 1.4 μm mirror sag (measured for a 14 mm × 14 mm area of the unpowered SA-PDM), and a ±200 nm hysteresis error.
Krystian L, Wlodarczyk, Emma, Bryce, Noah, Schwartz, Mel, Strachan, David, Hutson, Robert R J, Maier, David, Atkinson, Steven, Beard, Tom, Baillie, Phil, Parr-Burman, Katherine, Kirk, Duncan P, Hand   +11 more
openaire   +3 more sources

Soft Robotics and Advanced Technologies for Minimally Invasive Bioprinting: The Future of Internal Organ Repair. [PDF]

Adv Sci (Weinh)
This review examines the evolution of bioprinting toward minimally invasive in situ strategies for internal organ regeneration. It defines the technological roadmap from handheld systems to advanced minimally invasive bioprinting platforms, positioning soft robotics as a core enabler.
Vu DT, Phan NA, Ngo ST, Phan MT, Truong TA, Nguyen CC, Phan PT, Phan HP, Do TN, Thai MT.   +9 more
europepmc   +2 more sources

Robust control of a bimorph mirror for adaptive optics system [PDF]

, 2008
We apply robust control technics to an adaptive optics system including a dynamic model of the deformable mirror. The dynamic model of the mirror is a modification of the usual plate equation. We propose also a state-space approach to model the turbulent
Arzelier, Denis, Baudouin, Lucie, Guignard, Fabien, Prieur, Christophe   +3 more
core   +3 more sources

Calibration of force actuators on an adaptive secondary prototype [PDF]

, 2008
In the context of the Large Binocular Telescope project, we present the results of force actuator calibrations performed on an adaptive secondary prototype called P45, a thin deformable glass with magnets glued onto its back.
Brousseau, Brusa, del Vecchio, Divoux, Fernandez, Riccardi, Riccardi, Riccardi   +7 more
core   +1 more source