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Download or read book Large Aperture Liquid Crystal Lenses with Tunable Lens Powers and Applications written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Amit Kumar Bhowmick
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Continuously Tunable Large Aperture Liquid Crystal-Based Lens For De-Focus And Astigmatism Correction written by Amit Kumar Bhowmick and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In imaging system, de-focus and astigmatism are the most common optical aberrations, and finding non-mechanical approach of correcting these aberrations is of great interest. Although non-mechanical correction of de-focus has been widely studied, astigmatism correction remains relatively unexplored. Motivated by this gap, this Ph.D. thesis focuses on the development of a new type of gradient refractive index (GRIN) liquid crystal (LC) lenses capable of non-mechanical correction of both astigmatism and de-focus. The proposed device consists of a stack of three electrically tunable cylindrical lenses that implement a concentric stripe electrode and segmented phase profile design. This system offers several advantages, including a simple, low-cost structure, a large aperture size (50 mm), low voltage drive, and a compact design. Compared to conventional mechanical approaches, this non-mechanical solution has significant potential for various applications such as wavefront correction in large telescopes, microscopy, augmented reality/virtual reality, and prescription eyeglasses. In the second part of the thesis, challenges associated with concentric electrode-based large aperture (50 mm) LC lenses with segmented phase profile designs are investigated, including haze-related and diffraction-related issues. Effective solutions are provided to enhance the optical quality of these lenses (reduction of fringing field effect with an insulator layer and inclusion of black mask). By addressing these challenges, a 50 mm aperture size electrically focus tunable LC spherical lens with enhanced optical quality is developed. The proposed tunable lenses exhibit lightweight (
Author : Hongwen Ren
Publisher : John Wiley & Sons
ISBN 13 : 1118018990
Total Pages : 286 pages
Book Rating : 4.1/5 (18 download)
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.
Author : Cheng-Chung Lee
Publisher : Springer
ISBN 13 : 9401793921
Total Pages : 543 pages
Book Rating : 4.4/5 (17 download)
Download or read book The Current Trends of Optics and Photonics written by Cheng-Chung Lee and published by Springer. This book was released on 2014-11-25 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optics and photonics offer new and vibrant approaches to meeting the challenges of the 21st century concerning energy conservation, education, agriculture, personal health and the environment. One of the most effective ways to address these global problems is to provide updated and reliable content on light-based technologies. Optical thin films and meta-materials, lasers, optical communications, light-emitting diodes, solar cells, liquid crystal technology, nanophotonics and biophotonics all play vital roles in enriching our lives. We hope to raise readers’ awareness of how optical technologies are now promoting sustainable development and providing reliable solutions to basic human needs. Furthermore, in order to broaden new research fields, we hope to inspire them to pursue further cutting-edge breakthroughs on the basis of the accomplishments that have already been made.
Author : Hongrui Jiang
Publisher : MDPI
ISBN 13 : 3038420506
Total Pages : 156 pages
Book Rating : 4.0/5 (384 download)
Download or read book Microlenses written by Hongrui Jiang and published by MDPI. This book was released on 2018-10-08 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Microlenses" that was published in Micromachines
Author : Patrick Forrest Brinkley
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (32 download)
Download or read book Performance Characteristics of a High Resolution Liquid Crystal Lens written by Patrick Forrest Brinkley and published by . This book was released on 1988 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrés Márquez
Publisher : MDPI
ISBN 13 : 303921828X
Total Pages : 172 pages
Book Rating : 4.0/5 (392 download)
Download or read book Liquid Crystal on Silicon Devices written by Andrés Márquez and published by MDPI. This book was released on 2019-11-19 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid Crystal on Silicon (LCoS) has become one of the most widespread technologies for spatial light modulation in optics and photonics applications. These reflective microdisplays are composed of a high-performance silicon complementary metal oxide semiconductor (CMOS) backplane, which controls the light-modulating properties of the liquid crystal layer. State-of-the-art LCoS microdisplays may exhibit a very small pixel pitch (below 4 μm), a very large number of pixels (resolutions larger than 4K), and high fill factors (larger than 90%). They modulate illumination sources covering the UV, visible, and far IR. LCoS are used not only as displays but also as polarization, amplitude, and phase-only spatial light modulators, where they achieve full phase modulation. Due to their excellent modulating properties and high degree of flexibility, they are found in all sorts of spatial light modulation applications, such as in LCOS-based display systems for augmented and virtual reality, true holographic displays, digital holography, diffractive optical elements, superresolution optical systems, beam-steering devices, holographic optical traps, and quantum optical computing. In order to fulfil the requirements in this extensive range of applications, specific models and characterization techniques are proposed. These devices may exhibit a number of degradation effects such as interpixel cross-talk and fringing field, and time flicker, which may also depend on the analog or digital backplane of the corresponding LCoS device. The use of appropriate characterization and compensation techniques is then necessary.
Author : Guangya Zhou
Publisher : CRC Press
ISBN 13 : 1498741347
Total Pages : 447 pages
Book Rating : 4.4/5 (987 download)
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 447 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.
Author : Deng-Ke Yang
Publisher : John Wiley & Sons
ISBN 13 : 1118752007
Total Pages : 588 pages
Book Rating : 4.1/5 (187 download)
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.
Author : Mark Warner
Publisher : Oxford University Press
ISBN 13 : 9780199214860
Total Pages : 423 pages
Book Rating : 4.2/5 (148 download)
Download or read book Liquid Crystal Elastomers written by Mark Warner and published by Oxford University Press. This book was released on 2007-04-05 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is a primer for liquid crystals, polymers, rubber and elasticity. It is directed at physicists, chemists, material scientists, engineers and applied mathematicians at the graduate student level and beyond.
Author : Shri Singh
Publisher : Springer Nature
ISBN 13 : 303152621X
Total Pages : 676 pages
Book Rating : 4.0/5 (315 download)
Download or read book Handbook of Liquid Crystals—Volume II written by Shri Singh and published by Springer Nature. This book was released on with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A A Fuki
Publisher : CRC Press
ISBN 13 : 9789056990367
Total Pages : 200 pages
Book Rating : 4.9/5 (93 download)
Download or read book Geometrical Optics of Weakly Anisotropic Media written by A A Fuki and published by CRC Press. This book was released on 1998-02-25 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores recent developments in QIA and describes the application of the theory to different branches of wave physics, from plasma physics, quantum physics, and ionospheric radio wave propagation to acoustics, optics, and astrophysics. This is an up-to-the-minute exposition of the latest developments in an important new area, written by authors of outstanding reputation. A rich source of both theoretical methods and practical applications, it covers a wide range of problems of general physical significance. Until recently, there was no effective method for describing waves in weakly anisotropic inhomogeneous media. The method of quasi-isotropic approximation (QIA) of geometrical optics was developed to overcome this problem. The QIA approach bridges the gap between geometrical optics of isotropic media (Rytov method) and that of anisotropic media (Courant-Lax approach), thus providing a complete picture of the geometrical optics of inhomogeneous media.
Author : Donald C. O'Shea
Publisher : SPIE Press
ISBN 13 : 9780819451712
Total Pages : 266 pages
Book Rating : 4.4/5 (517 download)
Download or read book Diffractive Optics written by Donald C. O'Shea and published by SPIE Press. This book was released on 2004 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the reader with the broad range of materials that were discussed in a series of short courses presented at Georgia Tech on the design, fabrication, and testing of diffractive optical elements (DOEs). Although there are not long derivations or detailed methods for specific engineering calculations, the reader should be familiar and comfortable with basic computational techniques. This text is not a 'cookbook' for producing DOEs, but it should provide readers with sufficient information to assess whether this technology would benefit their work, and to understand the requirements for using the concepts and techniques presented by the authors.
Author : Thomas Kallard
Publisher :
ISBN 13 :
Total Pages : 406 pages
Book Rating : 4.3/5 (97 download)
Download or read book Liquid Crystal Devices written by Thomas Kallard and published by . This book was released on 1973 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pengpeng Zhao
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (993 download)
Download or read book Liquid Tunable Aspherical Lenses written by Pengpeng Zhao and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Huikai Xie
Publisher : MDPI
ISBN 13 : 3039213032
Total Pages : 176 pages
Book Rating : 4.0/5 (392 download)
Download or read book Optical MEMS written by Huikai Xie and published by MDPI. This book was released on 2019-08-06 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue Optical MEMS that was published in Micromachines
Author : Hans P. Zappe
Publisher : Cambridge University Press
ISBN 13 : 1107032458
Total Pages : 477 pages
Book Rating : 4.1/5 (7 download)
Download or read book Tunable Micro-optics written by Hans P. Zappe and published by Cambridge University Press. This book was released on 2016 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive survey of state-of-the-art tunable micro-optics, covering advances in materials, components and systems.
