Download or read book Contribution to Liquid Lens Technology written by Maziar Ahmadi Zeidabadi and published by . This book was released on 2016 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interest on microfluidic systems based on electrowetting-on-dielectric (EWOD) and the miniaturization of such integrated devices, has increased significantly mainly due to the advent of mass market applications such as lab-on-chip, liquid lenses and reflective displays. The main objective of this work focuses on the scientific and technological challenges that the fabrication and optimization of liquid lens faces. Those are mainly related to the materials used and their associated fabrication techniques, in order to have stable devices with high performance for long term functionality. The work reported here contributes the research to reduce the actuation voltage and to increase stability and reliability of electrowetting devices such as liquid lenses at laboratory scale. We address various aspects related to liquid lenses: (a), improvement of the hydrophobic layer deposition process leading contact angle recovery enhancement, (b) investigation of the dielectric materials and deposition techniques to reduce the required applied voltage (c) specific design of electrodes for 2D movement of the liquid lens, and (d) investigation of nonaqueous liquids to improve the dynamic behavior and long term cycling functionality. (e) An attempt is made to develop behavioral models that can explain EWOD phenomena with an electronic circuit software.
Download or read book 2D Liquid Lens Based on EWOD written by Maziar Ahmadi Zeidabadi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: [ANGLÈS] This thesis presents the fabrication, development and characteristics of a liquid lens based on electrowetting. Essentially, when the lens is in liquid form, both its position and its curvature can be reversibly tuned through electrowetting. Variable focal length liquid microlenses are being used to create the next generation lenses for a wide variety of microelectromechanical systems (MEMS) and NEMS applications. In real-time operations, the application of a voltage causes the lens to change its focal length. The liquid lens recovers its initial focal length upon removal of the voltage. Taking a wettability mechanism approach, surface properties are determined by contact angles of different test liquids on the samples due to their unique surface energies [1]. To search out and examine the particularities, in an attempt to learn the facts about liquid lenses, electrowetting is incorporated into the design of a liquid lens in a certain fabrication plan. This electrowetting is considered to control and maintain the planar (2D) liquid lens shape and its position by applying potential between electrodes and ground through the conductive liquid. Based on this electrowetting, a planar liquid lens is designed, consisting of conductive liquid such as oil or water and substrate with specific pattern of electrodes. The conductive drop should be confined to the center position. The electrodes, covered by a hydrophobic layer, when applying electric potential on them (or some of them) help to change the shape and position of the droplet that forms the lens. The focal length of the lens also varies, according to different droplet dimensions.
Download or read book Introduction to Adaptive Lenses written by Hongwen Ren and published by John Wiley & Sons. This book was released on 2012-04-24 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents readers with the basic science, technology, and applications for every type of adaptive lens An adaptive lens is a lens whose shape has been changed to a different focal length by an external stimulus such as pressure, electric field, magnetic field, or temperature. Introduction to Adaptive Lenses is the first book ever to address all of the fundamental operation principles, device characteristics, and potential applications of various types of adaptive lenses. This comprehensive book covers basic material properties, device structures and performance, image processing and zooming, optical communications, and biomedical imaging. Readers will find homework problems and solutions included at the end of each chapter—and based on the described device structures, they will have the knowledge to fabricate adaptive lenses for practical applications or develop new adaptive devices or concepts for advanced investigation. Introduction to Adaptive Lenses includes chapters on: Optical lenses Elastomeric membrane lenses Electro-wetting lenses Dielectrophoretic lenses Mechanical-wetting lenses Liquid crystal lenses This is an important reference for optical engineers, research scientists, graduate students, and undergraduate seniors.
Download or read book A Liquid Lens Based on Electrowetting written by Jihwan Park and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Pattern Recognition and Computer Vision 5th Edition written by Chi-hau Chen and published by World Scientific. This book was released on 2015-12-15 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides an up-to-date and authoritative treatment of pattern recognition and computer vision, with chapters written by leaders in the field. On the basic methods in pattern recognition and computer vision, topics range from statistical pattern recognition to array grammars to projective geometry to skeletonization, and shape and texture measures. Recognition applications include character recognition and document analysis, detection of digital mammograms, remote sensing image fusion, and analysis of functional magnetic resonance imaging data, etc.
Download or read book A Study of Liquid Lenses written by Joseph John Jasper and published by . This book was released on 1933 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Optofluidics written by Aaron R. Hawkins and published by CRC Press. This book was released on 2010-03-19 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optofluidics is an emerging field that involves the use of fluids to modify optical properties and the use of optical devices to detect flowing media. Ultimately, its value is highly dependent on the successful integration of photonic integrated circuits with microfluidic or nanofluidic systems. Handbook of Optofluidics provides a snapshot of the s
Download or read book The Contact Lens Manual written by Andrew Gasson and published by Elsevier Health Sciences. This book was released on 2010-07-08 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Contact Lens Manual continues to meet the needs of a new generation of optometrists, dispensing opticians, contact lens practitioners and students who require clear and reliable information for fitting a complete range of contact lenses. The fourth edition of this best-selling classic, now in full colour throughout, provides the most up-to-date guidance in all aspects of today's lenses in a practical and easy to use manual. Featuring new developments in lens types, care regimes and current practices, this manual offers a complete package to help readers expand their lens knowledge, improve fitting and optimise patient care. - The authors use a down-to-earth practical approach to distil years of experience into one handy volume. - A bullet point style makes the information easily accessible. - Key information is presented so it can be quickly located. - Practical tips, clinical pearls, helpful advice, and warnings are presented in boxes so readers can see at a glance what to do. - Features updates to all chapters and lens types with a wealth of new information on silicone hydrogels, toric soft lenses, rigid gas-permeable fitting and patient after care. - Presents a new chapter on dry eyes with expert guidance on treatment and practical management advice. - Includes an expanded illustration programme and page design with full colour throughout including colour-coded sections and boxes to highlight key information for easier learning. - Electronic access to brand new video footage of lens and eye care regimes, along with over 100 clinical photographs, images from the book, simulations and calculation tools.
Download or read book Handbook of Charged Particle Optics written by Jon Orloff and published by CRC Press. This book was released on 2017-12-19 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing proliferation of nanotechnologies, powerful imaging technologies are being developed to operate at the sub-nanometer scale. The newest edition of a bestseller, the Handbook of Charged Particle Optics, Second Edition provides essential background information for the design and operation of high resolution focused probe instruments. The book’s unique approach covers both the theoretical and practical knowledge of high resolution probe forming instruments. The second edition features new chapters on aberration correction and applications of gas phase field ionization sources. With the inclusion of additional references to past and present work in the field, this second edition offers perfectly calibrated coverage of the field’s cutting-edge technologies with added insight into how they work. Written by the leading research scientists, the second edition of the Handbook of Charged Particle Optics is a complete guide to understanding, designing, and using high resolution probe instrumentation.
Download or read book Research Development written by and published by . This book was released on 1994-07 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress In Liquid Crystal Lc Science And Technology In Honor Of Kobayashi s 80th Birthday written by Hoi-sing Kwok and published by World Scientific. This book was released on 2013-04-04 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: The presence of liquid crystal displays (LCDs) marks the advances in mobile phones and television development over the last few decades. Japanese companies were the first to commercialize passive-matrix TNLCDs and, later on, high-resolution activematrix LCDs.Prof. Shunsuke Kobayashi has made essential contributions to Japan's prominence in LCD development throughout this period. He is well-known not only for his own groundbreaking research, but also for the training of many prominent figures in the display industry, both in Japan and in other countries.This book brings together many prominent researchers in the field of liquid crystal science and technology, to share with us the key developments in LCD over the last few decades. It comprises of five categories — from basic physics and chemistry of liquid crystals, to detailed descriptions of alignment technologies, wide viewing angle technologies, LC optics, and display applications.The Slottow-Owaki Prize is awarded for outstanding contributions to the education and training of students and professionals in the field of information displays. This year, the award recipient is Dr. Hoi-Sing Kwok, SID fellow and professor at Hong Kong University, for providing education and training in display technology to many students and professionals in Asia through the creation of a display research center at the Hong Kong University of Science and Technology.
Download or read book Fundamentals of Liquid Crystal Devices written by Deng-Ke Yang and published by John Wiley & Sons. This book was released on 2014-12-03 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid Crystal Devices are crucial and ubiquitous components of an ever-increasing number of technologies. They are used in everything from cellular phones, eBook readers, GPS devices, computer monitors and automotive displays to projectors and TVs, to name but a few. This second edition continues to serve as an introductory guide to the fundamental properties of liquid crystals and their technical application, while explicating the recent advancements within LCD technology. This edition includes important new chapters on blue-phase display technology, advancements in LCD research significantly contributed to by the authors themselves. This title is of particular interest to engineers and researchers involved in display technology and graduate students involved in display technology research. Key features: Updated throughout to reflect the latest technical state-of-the-art in LCD research and development, including new chapters and material on topics such as the properties of blue-phase liquid crystal displays and 3D liquid crystal displays; Explains the link between the fundamental scientific principles behind liquid crystal technology and their application to photonic devices and displays, providing a thorough understanding of the physics, optics, electro-optics and material aspects of Liquid Crystal Devices; Revised material reflecting developments in LCD technology, including updates on optical modelling methods, transmissive LCDs and tunable liquid crystal photonic devices; Chapters conclude with detailed homework problems to further cement an understanding of the topic.
Download or read book Progress in Liquid Crystal Science and Technology written by Hoi-Sing Kwok and published by World Scientific. This book was released on 2013 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: The presence of liquid crystal displays (LCDs) marks the advances in mobile phones and television development over the last few decades. Japanese companies were the first to commercialize passive-matrix TNLCDs and, later on, high-resolution activematrix LCDs.Prof. Shunsuke Kobayashi has made essential contributions to Japan''s prominence in LCD development throughout this period. He is well-known not only for his own groundbreaking research, but also for the training of many prominent figures in the display industry, both in Japan and in other countries.This book brings together many prominent researchers in the field of liquid crystal science and technology, to share with us the key developments in LCD over the last few decades. It comprises of five categories OCo from basic physics and chemistry of liquid crystals, to detailed descriptions of alignment technologies, wide viewing angle technologies, LC optics, and display applications."
Download or read book Optical MEMS Nanophotonics and Their Applications written by Guangya Zhou and published by CRC Press. This book was released on 2017-12-14 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers device design fundamentals and system applications in optical MEMS and nanophotonics. Expert authors showcase examples of how fusion of nanoelectromechanical (NEMS) with nanophotonic elements is creating powerful new photonic devices and systems including MEMS micromirrors, MEMS tunable filters, MEMS-based adjustable lenses and apertures, NEMS-driven variable silicon nanowire waveguide couplers, and NEMS tunable photonic crystal nanocavities. The book also addresses system applications in laser scanning displays, endoscopic systems, space telescopes, optical telecommunication systems, and biomedical implantable systems. Presents efforts to scale down mechanical and photonic elements into the nano regime for enhanced performance, faster operational speed, greater bandwidth, and higher level of integration. Showcases the integration of MEMS and optical/photonic devices into real commercial products. Addresses applications in optical telecommunication, sensing, imaging, and biomedical systems. Prof. Vincent C. Lee is Associate Professor in the Department of Electrical and Computer Engineering, National University of Singapore. Prof. Guangya Zhou is Associate Professor in the Department of Mechanical Engineering at National University of Singapore.
Download or read book Smart Mini Cameras written by Tigran V. Galstian and published by CRC Press. This book was released on 2013-09-24 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achieve the Best Camera Design: Up-to-Date Information on MCMs Miniature camera modules (MCMs), such as webcams, have rapidly become ubiquitous in our day-to-day devices, from mobile phones to interactive TV systems. MCMs—or "smart" cameras—can zoom, adjust their frame rate automatically with illumination change, focus at different distances, compensate for hand shake, and transform captured images. With contributions from academics and field engineers, Smart Mini-Cameras discusses the structure, operation principles, applications, and future trends of miniature mobile cameras. It compares this technology with traditional digital still cameras and explains the specific requirements of MCM components (imposed by the size or type of application) in terms of optical design, image sensor, and functionalities. The book describes the implementation of several active functionalities, including liquid crystal auto focus (AF) and optical image stabilization (OIS). It also explores how new technologies, such as the curved detector and transforming optics, are stimulating novel trends, including a miniature panoramic lens on mobile phones. By providing you with an understanding of the components and performance tradeoffs of MCMs, this book will help you achieve the best camera design. It also answers frequently asked questions, such as the importance of the number of megapixels in a mobile phone camera and the value of AF and OIS features.
Download or read book Laser Focus World written by and published by . This book was released on 2008 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Global electro-optic technology and markets." "Photonics technologies & solutions for technical professionals worldwide."
Download or read book Foundations of Optical System Analysis and Design written by Lakshminarayan Hazra and published by CRC Press. This book was released on 2022-02-06 with total page 775 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the incorporation of scientific approach in tackling problems of optical instrumentation, analysis and design of optical systems constitute a core area of optical engineering. A large number of software with varying level of scope and applicability is currently available to facilitate the task. However, possession of an optical design software, per se, is no guarantee for arriving at correct or optimal solutions. The validity and/or optimality of the solutions depend to a large extent on proper formulation of the problem, which calls for correct application of principles and theories of optical engineering. On a different note, development of proper experimental setups for investigations in the burgeoning field of optics and photonics calls for a good understanding of these principles and theories. With this backdrop in view, this book presents a holistic treatment of topics like paraxial analysis, aberration theory, Hamiltonian optics, ray-optical and wave-optical theories of image formation, Fourier optics, structural design, lens design optimization, global optimization etc. Proper stress is given on exposition of the foundations. The proposed book is designed to provide adequate material for ‘self-learning’ the subject. For practitioners in related fields, this book is a handy reference. Foundations of Optical System Analysis and Synthesis provides A holistic approach to lens system analysis and design with stress on foundations Basic knowledge of ray and wave optics for tackling problems of instrumental optics Proper explanation of approximations made at different stages Sufficient illustrations for facilitation of understanding Techniques for reducing the role of heuristics and empiricism in optical/lens design A sourcebook on chronological development of related topics across the globe This book is composed as a reference book for graduate students, researchers, faculty, scientists and technologists in R & D centres and industry, in pursuance of their understanding of related topics and concepts during problem solving in the broad areas of optical, electro-optical and photonic system analysis and design.
