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Bimorph

About: Bimorph is a research topic. Over the lifetime, 3339 publications have been published within this topic receiving 51880 citations.


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Journal ArticleDOI
TL;DR: In this paper, a new electrical configuration for driving piezoelectric benders is described, which is compatible with parallel-polled, bimorph and multimorph benders.
Abstract: This article describes a new electrical configuration for driving piezoelectric benders. The ‘Biased Bipolar’ configuration is compatible with parallel-polled, bimorph and multimorph benders. The new configuration is similar to the standard three-wire drive method where the top electrode is biased with a DC voltage and the bottom electrode is grounded. However, the new configuration uses an alternate DC bias voltage and adjusted range for the central electrode which allows the full range of positive and negative electric fields to be utilized. Using this technique, the predicted deflection and force can be increased by a factor of 2.2 compared to the standard two wire configuration and 1.3 times for the standard three wire configuration. These predictions were verified experimentally where the measured factor of improvement in displacement and force was of 2.4 and 1.3 compared to the standard two-wire and three-wire configurations.

22 citations

Proceedings ArticleDOI
TL;DR: In this paper, the performance of a deformable mirror with 188 electrodes is reported for a new adaptive optics system at the Subaru Telescope equipped with a laser-guide-star (LGSAO).
Abstract: The performance of a deformable mirror with 188 electrodes is reported in this paper. The deformable mirrorhas been manufactured by CILAS for a new adaptive optics system at Subaru Telescope equipped with laser-guide-star. The type of deformable mirror is bimorph PZT with the blank diameter of 130 mm (beam size 90mm).Keywords: adaptive optics system, deformable mirror, bimorph 1. INTRODUCTION A project updating the adaptive optics (AO) system of Subaru Telescope 1,2 to a laser-guide-star adaptive optics(LGSAO) 3,4 is going on. One of the key components in the system is a deformable mirror (DM). The DM consistsof two PZT plates in the con“guration of bimorph and has 188 control electrodes in-between. An optical-qualityglass plate is glued on the mirror side of the DM and another glass plate on the other side (wiring side) tokeep symmetrical structure. Finite element analysis (FEA) had been performed to “nalize the speci“cation, bytaking account of trade-o between stroke and the size of each electrode, between resonance frequency and thediameter of blank (Ref.5). The DM has been manufactured by CILAS based on the speci“cation. In this paper,the performance of the DM is presented together with comparison between the test results and FEA.

22 citations

Journal ArticleDOI
22 Mar 2013
TL;DR: In this article, a super-polished adaptive bimorph mirror has been developed, which provides variable focal distance and local figure control in the sub-nm range, and has the potential to generate distortion-free beams and enable dynamical focusing and wavefront control.
Abstract: A novel super-polished adaptive bimorph mirror has been developed, which provides variable focal distance and local figure control in the sub-nm range. The optic has the potential to generate distortion-free beams and enable dynamical focusing and wavefront control. We present results of this optic, including ex-situ characterisation of the surface topography using the Diamond-NOM, and in-situ investigation using synchrotron light at Diamond's B16 Test beamline. The wavefront properties of the mirror have also been studied using at-wavelength metrology methods based on X-ray speckle tracking.

22 citations

Journal ArticleDOI
TL;DR: In this paper, a new concept of a microgripper using Lorentz force actuation and electrothermal bimorph actuation is presented, and a 210 µ m deflection of a 1000 µm-long finger was obtained at the input voltage of 1 V.
Abstract: A new concept of a microgripper using Lorentz force actuation and electrothermal bimorph actuation is presented here. Design, theoretical consideration, fabrication process and characterization results are presented. Many free-standing fingers, ranging from 200 µ m to 1000 µ m in length, have been fabricated successfully by the micromachining process. We have observed the low driving voltage performance and the flexible finger motion of the flexible microgripper (FMG) under the microscope. A 210 µ m deflection of a 1000-µm-long finger was obtained at the input voltage of 1 V.

22 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202358
2022116
202191
202090
2019123
2018117