Journal ArticleDOI
Multilayered deformable mirror using PVDF films
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TLDR
A 1-D deformable mirror which uses multilayered PVDF piezoelectric films as the actuators is proposed and the principle of construction and several basic experimental results are presented.Abstract:
A 1-D deformable mirror which uses multilayered PVDF piezoelectric films as the actuators is proposed. First, a set of desired wave fronts is considered and the electrode shape of each film is designed so that the film generates one component of the set. In actual operation of the mirror a combination of the supply voltages is used to control the surface profile. The principle of construction and several basic experimental results are presented.read more
Citations
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Journal ArticleDOI
Intelligent structures for aerospace - A technology overview and assessment
TL;DR: In this paper, the authors present an overview and assessment of the technology leading to the development of intelligent structures, which are those which incorporate actuators and sensors that are highly integrated into the structure and have structural functionality, as well as highly integrated control logic, signal conditioning and power amplification electronics.
Journal ArticleDOI
Piezoelectric properties of PVDF/MWCNT nanofiber using near-field electrospinning
TL;DR: In this article, the authors used near-field electrospinning to fabricate polyvinylidene fluoride (PVDF) piezoelectric nanofibers mixed with multiwalled carbon nanotubes (MWCNT).
Journal ArticleDOI
Electrets: Dielectrics with Quasi-Permanent Charge or Polarization
TL;DR: A review of very recent electret work can be found in this paper, where a history-oriented introduction refers to important early studies of charge storage in insulators; a number of relevant surveys are listed for further information on previous electret research.
Book
Smart Structures Theory
Inderjit Chopra,Jayant Sirohi +1 more
TL;DR: In this article, the authors focus on smart materials, structures and systems, which are also referred to as intelligent, adaptive, active, sensory and metamorphic, and the purpose of these materials from the perspective of smart systems is their ability to minimize life-cycle cost and/or expand the performance envelope.
Journal ArticleDOI
Electron-beam poling of piezoelectric polymer electrets
TL;DR: In this article, the authors demonstrated that the thickness of the unpoled sample volume is proportional to the 1.5th power of the electron energy used and proposed a method for fabrication of polymer electrets with a polarization zone of predetermined thickness for flexure mode devices.
References
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Journal ArticleDOI
Active optics: A new technology for the control of light
TL;DR: Active optical systems as mentioned in this paper are those in which real-time control over optical wavefronts is employed to optimize system perference in the presence of random distrurbances, such as interference.
Journal ArticleDOI
The multidither principle in adaptive optics
TL;DR: A servo signal-to-noise analysis indicates how the optimum choice of dither magnitude depends on the system noise, and many modes of operating these systems are briefly reviewed.
Journal ArticleDOI
Bimorph piezoelectric flexible mirror
Ehud Steinhaus,S. G. Lipson +1 more
TL;DR: In this paper, a flexible mirror constructed from plates of glass and lead zirconium titanate (PZT) piezoelectric ceramic glued together is described, which is activated by a series of electrodes on the reverse side.
Journal ArticleDOI
Analysis of adaptive optical elements made from piezolectric bimorphs
TL;DR: In this paper, the deformation properties of an adaptive optical element made from a piezoelectric bimorph plate are analyzed and the fundamental relationship between the optical surface and the voltage distribution applied across the thickness of the plate is derived and the general solution for an infinite plate is also presented.
Journal ArticleDOI
Experimental studies of a deformable-mirror adaptive optical system*
James E. Pearson,S. Hansen +1 more
TL;DR: In this article, the measured characteristics of two different deformable mirror designs are presented, one exhibiting an exp(−αr1.5) characteristic and the other having an exp((−γr2.5)) characteristic.