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MEMS Mirrors

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ISBN: 9783038428671 9783038428688 Year: Pages: VI, 210 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Physics (General)
Added to DOAB on : 2018-05-04 13:32:54
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MEMS mirrors can steer, modulate and switch light, as well as control the wavefront for focusing or phase modulation. MEMS mirrors have found enormous commercial success in projectors, displays and fiberoptic communications. Micro-spectrometers based on MEMS mirrors are starting to appear in the consumer market. There are also many breakthroughs in applying MEMS mirrors for endoscopic imaging. Equally excitingly, a new wave of opportunities for MEMS mirrors is coming up, for example, micro-LiDAR for autonomous driving and robotics, optical cross connect (OXC) for cloud data centers, and optical scanners for virtual reality/augumented reality, just to name a few. Of course, there are a number of big challenges that researchers and engineers must overcome to fully utiltize MEMS mirrors’ potential: modeling and control are inherently complex due to the multiphysics, multi-DOF and nonlinear nature of the microactuators for MEMS mirrors; reliability is always a huge hurdle for commercilization; and the tradeoffs among the speed, aperture, and scan range are often overwhelming. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on: (1) novel designs, fabrication, control, and modeling of MEMS mirrors based on all kinds of actuation mechanisms; and (2) new developments of applying MEMS mirrors of any kind in consumer electronics, optical communications, industry, medicine, agriculture, space, or defense.

Piezoelectric MEMS

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ISBN: 9783038970057 9783038970064 Year: Pages: VIII, 168 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Electrical and Nuclear Engineering
Added to DOAB on : 2018-07-10 12:55:10
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Electromechanical transducers based on piezoelectric layers and thin films are continuously finding their way into micro-electromechanical systems (MEMS). Piezoelectric transducers feature a linear voltage response, no snap-in behavior and can provide both attractive and repulsive forces. This removes inherent physical limitations present in the commonly used electrostatic transducer approach, while maintaining beneficial properties such as low-power operation. In order to exploit the full potential of piezoelectric MEMS, interdisciplinary research efforts range from investigations of advanced piezoelectric materials over the design of novel piezoelectric MEMS sensor and actuator devices, to the integration of PiezoMEMS devices into full low-power systems. In this Special Issue, the current status of this exciting research field will be presented, covering a wide range of topics including, but not limited to:• Experimental and theoretical research on piezoelectric materials such as AlN, ScAlN, ZnO or PZT, PVDF with a strong focus on the application of MEMS devices.• Deposition and synthesis techniques for piezoelectric materials enabling integration of those materials into MEMS fabrication processes.• Modelling and simulation of piezoelectric MEMS devices and systems.• Piezoelectric MEMS resonators for measuring physical quantities such as mass, acceleration, yaw rate, pressure and viscosity or density of liquids.• Optical MEMS devices, such as scanning micro mirror devices and optical switches, based on piezoelectric MEMS.• Acoustic devices, such as SAW, BAW or FBARs and acoustic transducers, based on piezoelectric MEMS, such as microphones or loudspeakers.• Piezoelectric energy harvesting devices.• Specific packaging aspects of piezoelectric devices and systems.• Low and zero power systems, featuring low-power sensors combined with energy harvesting devices, at least one of which is based on piezoelectric MEMS.

Micromanipulation

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ISBN: 9783038975038 9783038975045 Year: Pages: 200 DOI: 10.3390/books978-3-03897-504-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Mechanical Engineering
Added to DOAB on : 2019-01-10 10:09:02
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Nowadays, we meet microsystems in a variety of devices used in modern life. They are used, for example, in medicine, biology, industry, home appliances, transport, and aerospace. One of the main problems in the technological development of microsystems is their actuation. Several solutions have been suggested, such as electrostatic, electrothermal, electromagnetic, or piezoelectric actuation, although a valid solution seems to be still out of our reach.Another crucial problem in designing, manufacturing, and operating microsystems for micromanipulation consists in the loss of some basic paradigms commonly used as a source of inspiration at the macroscale. The differences in designing at the two different scales may have either positive or negative effects. For example, an unthinkable structure in the day–life domain, as, for example, a long “cantilever” bridge over the Hudson river, would become possible after downscaling “everything” from road dimensions to the micro-world. Alternatively, a fantastic electric motor that works very well in our world, by virtue of the basic principles of electromagnetism, would become useless if scaled back to the micro cosmos.This book opens a small window on the world of research, presenting a group of papers that try to respond to the challenge of increasing the efficiency and functionality of modern microsystems. A final little section is also dedicated to the development of new teaching methods successfully adopted in some university courses.

State-Of-The- Art Sensors Technology in France 2016

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ISBN: 9783038426523 9783038426530 Year: Pages: 218 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Analytical Chemistry
Added to DOAB on : 2018-01-16 09:42:38
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This Special Issue aims to provide a comprehensive overview of state-of-the-art sensors technology in France. It includes research articles that consolidate our understanding of the state-of-the-art in this area and also four reviews on hot fields in sensor technology (nanomaterials, electronic tongue and optical fibre networks).

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