Results 171 to 180 of about 3,113 (205)

Testing of thermally piezoelectric deformable mirror with buried functionality

SPIE Proceedings, 2014
Laser-induced mirror deformation and thermal lensing in optical high power systems shall be compensated by a thermally-piezoelectric deformable mirror (DM). In our device, the laser-induced thermal lensing is compensated by heating of the DM as previously described with compound loading.
C. Reinlein, M. Appelfelder, M. Goy, S. Gebhardt, N. Gutzeit   +4 more
openaire   +1 more source

Single Crystal Piezoelectric Actuators for Advanced Deformable Mirrors

Aerospace, 2004
In this paper, single crystal piezoelectric actuators are developed and demonstrated as a means of increasing actuator authority while maintaining strain precision for adaptive optics used large throw deformable mirror applications. Single crystal (PMN-PT crystal) stack actuators with foot print size of 5 mm × 5 mm and height varied from 16 mm to 21 mm
X. N. Jiang, P. W. Rehrig, W. S. Hackenberger, J. Moore, S. Chodimella, B. Patrick   +5 more
openaire   +1 more source

Piezoelectric deformable mirror based on monolithic PVDF membranes

SPIE Proceedings, 2011
Deformable mirrors using polyvinylidene fluoride (PVDF) membranes in a bimorph configuration have been previously investigated. Kratos Defense and Security Solutions, in partnership with Advanced Optical Systems, Inc. and NeXolve, Inc., have been evaluating the utility of unimorph PVDF films for fabrication of deformable mirrors.
Greg A. Finney, Kevin Spradley, Brandon Farmer, Lensey Smith, Brian Patrick   +4 more
openaire   +1 more source

Requirements for piezoelectric materials for deformable mirrors

Ferroelectrics, 1980
Abstract Deformable mirrors to correct wavefront errors in real time have emerged as a key component in adaptive optical systems being developed for a variety of applications. Piezoelectric materials, particularly lead zinconate titanate have proven to be the most desirable actuators for high speed, high element density, electrically controlled mirrors.
openaire   +1 more source

Piezoelectric deformable mirror technologies for astronomy at IOE, CAS

SPIE Proceedings, 2014
Institute of Optics & Electronics (IOE), Chinese Academy of Sciences (CAS) has more than 30 years’ experience on piezoelectric deformable mirror (DM) technologies research and developing since early 1980s. Several DMs of IOE have been used in many different application systems.
Chunlin Guan, Xinlong Fan, Xiaojun Zhang, Hong Zhou, Jinbo Mu, Lixia Xue, Kai Wei, Hao Xian, Changhui Rao, Yudong Zhang, Ning Ling   +10 more
openaire   +1 more source

Prototype Small Footprint Amplifier for Piezoelectric Deformable Mirrors

2011
Adaptive Optics (AO) systems of the Extremely Large Telescopes (ELT) will incorporate deformable mirrors with an order of magnitude larger number of piezoelectric actuators than the AO systems currently deployed. Simply scaling up the drive electronics offered commercially would substantially drive up the AO cost, pose unacceptably high demands for the
Caputa, Kris, Herriot, Glen, Niebergal, Joel, Zielinski, Adam   +3 more
openaire   +1 more source

Piezoelectric unimorph MEMS deformable mirror for ultra-large telescopes

SPIE Proceedings, 2005
This paper describes the results of our demonstration on a proof-of-concept piezoelectric unimorph-based deformable mirror (DM) with continuous single-crystal silicon membrane. A PZT unimorph actuator of 2.5 mm in diameter with optimized PZT/Si thickness and design showed a deflection of 5 μm at 50 V.
Yoshikazu Hishinuma, Eui-Hyeok Yang, Bruce M. Levine, Eric E. Bloemhof   +3 more
openaire   +1 more source

Experimental and simulation study of undesirable short-period deformation in piezoelectric deformable x-ray mirrors

Review of Scientific Instruments, 2012
To construct adaptive x-ray focusing optics whose optical parameters can be varied while performing wavefront correction, ultraprecise piezoelectric deformable mirrors have been developed. We computationally and experimentally investigated undesirable short-period deformation caused by piezoelectric actuators adhered to the substrate during mirror ...
Nakamori, Hiroki, Matsuyama, Satoshi, Imai, Shota, Kimura, Takashi, Sano, Yasuhisa, Kohmura, Yoshiki, Tamasaku, Kenji, Yabashi, Makina, Ishikawa, Tetsuya, Yamauchi, Kazuto   +9 more
openaire   +3 more sources

Characterization and training of a 19-element piezoelectric deformable mirror for lensing

Journal of Optical and Fiber Communications Research, 2010
Characterizing the fundamental response and operational parameters of a deformable mirror is a critical first step in the design of an adaptive optics system. This paper describes the characterization and training of a piezoelectric deformable mirror (PDM) to be implemented on a low order Adaptive Optics (AO) system at Short Wave Infrared (SWIR ...
Carlos O. Font, G. Charmaine Gilbreath, Blerta Bajramaj, David S. Kim, Freddie Santiago, Ty Martinez, Sergio R. Restaino   +6 more
openaire   +1 more source

Modelling and analysis of circular bimorph piezoelectric actuator for deformable mirror

Applied Mathematics and Mechanics, 2016
A theoretical model of a circular flexure-mode piezoelectric bimorph actuator is established. The circular bimorph structure, consisting of two flexible layers of piezoelectric material and a layer of metallic material in the middle, is powered to the flexural deformation.
Hairen Wang, Ming Hu, Zhenqin Li
openaire   +1 more source