Adaptive Optics Ophthalmologic Systems Using Dual Deformable Mirrors - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Adaptive Optics Ophthalmologic Systems Using Dual Deformable Mirrors write by . This book was released on 2007. Adaptive Optics Ophthalmologic Systems Using Dual Deformable Mirrors available in PDF, EPUB and Kindle. Adaptive Optics (AO) have been increasingly combined with a variety of ophthalmic instruments over the last decade to provide cellular-level, in-vivo images of the eye. The use of MEMS deformable mirrors in these instruments has recently been demonstrated to reduce system size and cost while improving performance. However, currently available MEMS mirrors lack the required range of motion for correcting large ocular aberrations, such as defocus and astigmatism. In order to address this problem, we have developed an AO system architecture that uses two deformable mirrors, in a woofer/tweeter arrangement, with a bimorph mirror as the woofer and a MEMS mirror as the tweeter. This setup provides several advantages, including extended aberration correction range, due to the large stroke of the bimorph mirror, high order aberration correction using the MEMS mirror, and additionally, the ability to ''focus'' through the retina. This AO system architecture is currently being used in four instruments, including an Optical Coherence Tomography (OCT) system and a retinal flood-illuminated imaging system at the UC Davis Medical Center, a Scanning Laser Ophthalmoscope (SLO) at the Doheny Eye Institute, and an OCT system at Indiana University. The design, operation and evaluation of this type of AO system architecture will be presented.
Modeling and Control of Magnetic Fluid Deformable Mirrors for Adaptive Optics Systems
Modeling and Control of Magnetic Fluid Deformable Mirrors for Adaptive Optics Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modeling and Control of Magnetic Fluid Deformable Mirrors for Adaptive Optics Systems write by Zhizheng Wu. This book was released on 2012-10-22. Modeling and Control of Magnetic Fluid Deformable Mirrors for Adaptive Optics Systems available in PDF, EPUB and Kindle. Modeling and Control of Magnetic Fluid Deformable Mirrors for Adaptive Optics Systems presents a novel design of wavefront correctors based on magnetic fluid deformable mirrors (MFDM) as well as corresponding control algorithms. The presented wavefront correctors are characterized by their linear, dynamic response. Various mirror surface shape control algorithms are presented along with experimental evaluations of the performance of the resulting adaptive optics systems. Adaptive optics (AO) systems are used in various fields of application to enhance the performance of optical systems, such as imaging, laser, free space optical communication systems, etc. This book is intended for undergraduate and graduate students, professors, engineers, scientists and researchers working on the design of adaptive optics systems and their various emerging fields of application. Zhizheng Wu is an associate professor at Shanghai University, China. Azhar Iqbal is a research associate at the University of Toronto, Canada. Foued Ben Amara is an assistant professor at the University of Toronto, Canada.
Introduction to Adaptive Optics
Introduction to Adaptive Optics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Introduction to Adaptive Optics write by Robert K. Tyson. This book was released on 2000. Introduction to Adaptive Optics available in PDF, EPUB and Kindle. Adaptive optics systems and components have achieved a level of sophistication and simplicity that goes beyond traditional applications in astronomy and the military and into developments in medicine, manufacturing, and communications. This book was written for those interested in the multidisciplinary technology and those who need a broad-brush explanation without wading through thousands of journal articles. It follows the structure of a one-day tutorial taught by the author, including humor and sidebars of historical material.
High-Resolution Adaptive Optics Scanning Laser Ophthalmoscope with Dual Deformable Mirrors
High-Resolution Adaptive Optics Scanning Laser Ophthalmoscope with Dual Deformable Mirrors - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook High-Resolution Adaptive Optics Scanning Laser Ophthalmoscope with Dual Deformable Mirrors write by . This book was released on 2006. High-Resolution Adaptive Optics Scanning Laser Ophthalmoscope with Dual Deformable Mirrors available in PDF, EPUB and Kindle. Adaptive optics scanning laser ophthalmoscope (AO SLO) has demonstrated superior optical quality of non-invasive view of the living retina, but with limited capability of aberration compensation. In this paper, we demonstrate that the use of dual deformable mirrors can effectively compensate large aberrations in the human retina. We used a bimorph mirror to correct large-stroke, low-order aberrations and a MEMS mirror to correct low-stroke, high-order aberration. The measured ocular RMS wavefront error of a test subject was 240 nm without AO compensation. We were able to reduce the RMS wavefront error to 90 nm in clinical settings using one deformable mirror for the phase compensation and further reduced the wavefront error to 48 nm using two deformable mirrors. Compared with that of a single-deformable-mirror SLO system, dual AO SLO offers much improved dynamic range and better correction of the wavefront aberrations. The use of large-stroke deformable mirrors provided the system with the capability of axial sectioning different layers of the retina. We have achieved diffraction-limited in-vivo retinal images of targeted retinal layers such as photoreceptor layer, blood vessel layer and nerve fiber layers with the combined phase compensation of the two deformable mirrors in the AO SLO.
Adaptive Optics for Vision Science
Adaptive Optics for Vision Science - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Adaptive Optics for Vision Science write by Jason Porter. This book was released on 2006-06-12. Adaptive Optics for Vision Science available in PDF, EPUB and Kindle. Leading experts present the latest technology and applications in adaptive optics for vision science Featuring contributions from the foremost researchers in the field, Adaptive Optics for Vision Science is the first book devoted entirely to providing the fundamentals of adaptive optics along with its practical applications in vision science. The material for this book stems from collaborations fostered by the Center for Adaptive Optics, a consortium of more than thirty universities, government laboratories, and corporations. Although the book is written primarily for researchers in vision science and ophthalmology, the field of adaptive optics has strong roots in astronomy. Researchers in both fields share this technology and, for this reason, the book includes chapters by both astronomers and vision scientists. Following the introduction, chapters are divided into the following sections: * Wavefront Measurement and Correction * Retinal Imaging Applications * Vision Correction Applications * Design Examples Readers will discover the remarkable proliferation of new applications of wavefront-related technologies developed for the human eye. For example, the book explores how wavefront sensors offer the promise of a new generation of vision correction methods that can deal with higher order aberrations beyond defocus and astigmatism, and how adaptive optics can produce images of the living retina with unprecedented resolution. An appendix includes the Optical Society of America's Standards for Reporting Optical Aberrations. A glossary of terms and a symbol table are also included. Adaptive Optics for Vision Science arms engineers, scientists, clinicians, and students with the basic concepts, engineering tools, and techniques needed to master adaptive optics applications in vision science and ophthalmology. Moreover, readers will discover the latest thinking and findings from the leading innovators in the field.
