Download or read book Tunable Micro lens System with Active Aberration Correction written by Philipp Waibel and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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:
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 (
Download or read book Fundamentals of Micro Optics written by Hans Zappe and published by Cambridge University Press. This book was released on 2010-09-30 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: From optical fundamentals to advanced applications, this comprehensive guide to micro-optics covers all the key areas for those who need an in-depth introduction to micro-optic devices, technologies, and applications. Topics covered range from basic optics, optical materials, refraction, and diffraction, to micro-mirrors, micro-lenses, diffractive optics, optoelectronics, and fabrication. Advanced topics, such as tunable and nano-optics, are also discussed. Real-world case studies and numerous worked examples are provided throughout, making complex concepts easier to follow, whilst an extensive bibliography provides a valuable resource for further study. With exercises provided at the end of each chapter to aid and test understanding, this is an ideal textbook for graduate and advanced undergraduate students taking courses in optics, photonics, micro-optics, microsystems, and MEMs. It is also a useful self-study guide for research engineers working on optics development.
Download or read book Tunable Liquid Micro optical Systems Based on Electrowetting written by Florian Krogmann and published by . This book was released on 2008 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Adaptive Optics written by Robert K. Tyson and published by CRC Press. This book was released on 2022-02-28 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Adaptive Optics describes the foundations, principles, and applications of adaptive optics (AO) and its enabling technologies. This leading textbook addresses the fundamentals of AO at the core of astronomy, high-energy lasers, biomedical imaging, and optical communications. Key Features: Numerous examples to explain and support the underlying principles Hundreds of new references to support the topics that are addressed End-of-chapter questions and exercises A complete system design example threaded through each chapter as new material is introduced
Download or read book Dynamically Variable Focal Length Microlens by Microfluidic and Electroactive Polymer Approaches microform written by Chen, Jackie Ching-Lung and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2004 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research is on a development of a variable focusing microlens system. The studies of modern researchers have thrown new light on this subject, which has aroused intense interest in making tunable focusing microlenses. The most well-known methods are liquid crystal and electrowetting. Both methods require electrodes immersed in the electrolyte solution, causing severe optical distortion, and require complicated fabrication processes. Few attempts have thus far been developed to make variable focusing lens using other approaches.
Download or read book Dynamically Variable Focal Length Microlens by Microfluidic and Electroactive Polymer Approaches written by Jackie Ching-Lung Chen and published by . This book was released on 2004 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research is on a development of a variable focusing microlens system. The studies of modern researchers have thrown new light on this subject, which has aroused intense interest in making tunable focusing microlenses. The most well-known methods are liquid crystal and electrowetting. Both methods require electrodes immersed in the electrolyte solution, causing severe optical distortion, and require complicated fabrication processes. Few attempts have thus far been developed to make variable focusing lens using other approaches.
Download or read book Tunable Liquid Optical Devices with Thermoelectric and Electrohydrodynamic Actuators written by Alireza Ousati Ashtiani and published by . This book was released on 2016 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of affordable miniaturized digital imaging devices has revolutionized many aspects of modern life. Most of these imaging devices still rely on old fashioned voice coil motors to displace the lens and form a sharp image. In order to decrease size and power consumption and increase focusing speed of small cameras, liquid tunable microlens alternatives have been proposed. Here, two types of focus tunable liquid microlenses are studied. The first type is a thermoelectrically actuated liquid microlens, and the second type uses an electrohydrodynamic actuator to move and center a liquid microlens. The first design demonstrates a sub-second response time, which makes it an agile device among thermally actuated microlenses. The second design harnesses an easy to fabricate, planar structure to realize a tunable microlens and center the liquid droplet. In both designs, focal length of the microlens has been measured. Moreover, optical aberrations of the thermally actuated microlens have been evaluated. In addition to liquid microlenses, a novel liquid tunable optical phase shifter is introduced. In this design, with the aid of an embedded electrowetting actuator, two liquid layers with different refractive indices are intermingled to create a tunable optical phase shifter that could be very useful in various optical imaging and instrumentation devices.
Download or read book Optics Letters written by and published by . This book was released on 2008 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Focus Tunable Microlens Arrays on Curvilinear Surfaces written by Difeng Zhu and published by . This book was released on 2011 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tunable Liquid Microlenses Formed from Dynamically Re configurable Double Emulsions written by Sara Nicole Nagelberg and published by . This book was released on 2015 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-scale optical components capable of on-demand reconfiguration of their internal morphology and composition would enable unprecedented control of light propogation on the microscale. Double emulsions formed from immiscible hydrocarbons and fluorocarbons offer a promising platform as reconfigurable micro-optical lenses. These droplet-based lenses can be reconfigured to strongly focusing, nearly transparent, or strongly scattering geometries. The dynamic variation of the lenses' optical interfaces can greatly enhance the lenses' ability to manipulate light. Finite Difference Time Domain and Raytracing techniques were used to characterize the optical properties of the drops and the simulations were verified experimentally immersing the lenses in an aqueous fluorescent medium in order to visualize their light manipulation capabilities. The lenses show a rapid response to external light stimuli or heat gradients and are susceptible to chemical triggers.
Download or read book Starting Systems for Zoom Optics with Tunable Lenses written by Beate Mitschunas and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Crystal Optical Device written by Leszek R. Jaroszewicz and published by MDPI. This book was released on 2020-01-03 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Special Issue “Liquid Crystal Optical Devices” discusses recent developments in the rapidly advancing subject of liquid crystals (LCs). The book is composed of several contributions from researchers in the field of liquid crystals that deal with the broadly with aspects of optical devices ranging from a theoretical viewpoints to practical implications of the properties of LCs. This is the first Special Issue devoted solely to recent advances in the rapidly expanding subject of LCs, a unique class of substances that combines both ordered structures with quasi-liquid-like properties. This Special Issue offers a broad perspective of the present state of the art in design and an up-to-date account of the most recent advances and progress in the field of LCs, providing thorough coverage of the demonstrated optical devices and the comprehensive analysis needed by professionals and engineers in the field of LC. The material is carefully structured, providing readers with a solid foundation of the principles, capabilities, use, and limitations of LC optical devices. In addition, this book covers the principles, recent advances and future developments of liquid crystal beam steering devices as well as recent advances in adaptive liquid crystal lenses.
Download or read book Metasurfaces Physics and Applications written by Sergey I. Bozhevolnyi and published by MDPI. This book was released on 2018-11-16 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Metasurfaces: Physics and Applications" that was published in Applied Sciences
Download or read book Robust and Compact Piezo Actuated Lenses with Dynamic Aberration Correction written by Hitesh Gowda Bettaswamy Gowda and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
