Download or read book Application of Phase Retrieval to the Measurement of Optical Surfaces and Wavefronts written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Application of phase retrieval to the measurement of optical surfaces and wavefronts.
Download or read book Application of Phase Retrieval to the Measurement of Optical Surfaces and Wavefronts written by Gregory R. Brady and published by . This book was released on 2008 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced theory of optical wave propagation and interferometric sensors for topography measurement written by Markus C. Schake and published by BoD – Books on Demand. This book was released on 2014-01-01 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manuscript provides a compendium for the application of the nonuniform wave model to standard problems of two beam interference and addresses common educational issues associated with wave propagation at attenuating interfaces. It also reports scientific advances in interferometric applications focusing on an interferometric point sensor with optical path length modulation and an areal measuring RGB-interferometer for fast topography measurements in the sub millisecond regime.
Download or read book Handbook of Optical Systems Volume 5 written by Bernd D¿rband and published by John Wiley & Sons. This book was released on 2012-05-14 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: The state-of-the-art full-colored handbook gives a comprehensive introduction to the principles and the practice of calculation, layout, and understanding of optical systems and lens design. Written by reputed industrial experts in the field, this text introduces the user to the basic properties of optical systems, aberration theory, classification and characterization of systems, advanced simulation models, measuring of system quality and manufacturing issues. In this Volume Volume 5 topics comprise the methods of measuring the properties of optical systems. The different fundamental techniques, such as propagation measurement and polarimetry, are introduced and discussed in detail and clarity. The presentation allows the reader, after having devised an optical system, to perform the measurements best suited to ascertain that the system fulfills the specific needs and requirements. The following chapters provide a survey on materials, coatings and surfaces of optical components, and combine this with a treatment of light and radiation. The book thus serves as a one-stop reference for metrology of optical systems. Other Volumes Volume 1: Fundamentals of Technical Optics Volume 2: Physical Image Formation Volume 3: Aberration Theory and Correction of Optical Systems Volume 4: Survey of Optical Instruments
Download or read book Phase Retrieval Using Power Measurements written by Jamal Arif and published by . This book was released on 2013 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Optical signals have two basic components that are power and phase, which can be demonstrated in both time and frequency domains. The common diagnostics which are available in the market only measure power component in time or frequency domain. However in certain areas phase measurements are also required. The phase retrieval techniques are used to calculate phase measurements from different methods. There are a number of applications where phase measurements are required like astronomy, wavefront sensing technique (James Webb space telescope), x-ray crystallography, fiber optic telecommunications etc. Various phase retrieval algorithms have been used in retrieving phase measurements in temporal and frequency domains. Gerchberg Saxton Algorithm technique is an iterative phase retrieval technique which has been used in phase retrieval methods. This iterative process involves iterative Fourier transformation back and forth between the object and Fourier domains with applications of the measured data or known constraints in each domain. We worked on developing an iterative phase retrieval technique keeping Gerchberg Saxton Algorithm as the basis of it and were able to successfully demonstrate phase retrieval in both temporal and spectral forms for a) Gaussian pulses having a wide range of initial educated guess phase; b) Chirped Gaussian pulses having various amounts of chirp; c) Chirped Super Gaussian pulses having various amounts of chirp. A metrics system was denied on which phase retrieval technique's success was based showing minimization of power, phase and instantaneous frequency metrics. During the study we found that chirped super Gaussian pulses of order 4 converge better than the chirped Gaussian pulses and also explored a way to choose a good educational phase without knowledge of the actual phase. Thus, this research provided a new foundation for further research on phase retrieval techniques of Gaussian and chirped Gaussian pulses."--Abstract.
Download or read book Large and Middle scale Aperture Aspheric Surfaces written by Shengyi Li and published by John Wiley & Sons. This book was released on 2017-01-18 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete all-in-one reference to aspheric fabrication and testing for optical applications This book provides a detailed introduction to the manufacturing and measurement technologies in aspheric fabrication. For each technology, both basic theory and practical applications are introduced. The book consists of two parts. In the first part, the basic principles of manufacturing technology for aspheric surfaces and key theory for deterministic subaperture polishing of aspheric surfaces are discussed. Then key techniques for high precision figuring such as CCOS with small polishing pad, IBF and MRF, are introduced, including the basic principles, theories and applications, mathematical modeling methods, machine design and process parameter selection. It also includes engineering practices and experimental results, based on the three kinds of polishing tools (CCOS, IBF and MRF) developed by the author’s research team. In the second part, basic principles of measurement and some typical examples for large and middle-scale aspheric surfaces are discussed. Then, according to the demands of low cost, high accuracy and in-situ measurement methods in the manufacturing process, three kinds of technologies are introduced, such as the Cartesian and swing-arm polar coordinate profilometer, the sub-aperture stitching interferometer and the phase retrieval method based on diffraction principle. Some key techniques are also discussed, including the basic principles, mathematical modeling methods, machine design and process parameter selection, as well as engineering practices and experimental results. Finally, the team’s research results about subsurface quality measurement and guarantee methods are also described. This book can be used as a reference for scientists and technologists working in optical manufacturing, ultra-precision machining, precision instruments and measurement, and other precision engineering fields. A complete all-in-one reference to aspheric fabrication and testing for optical applications Presents the latest research findings from the author’s internationally recognized leading team who are at the cutting edge of the technology Brings together surface processing and measurement in one complete volume, discussing problems and solutions Guides the reader from an introductory overview through to more advanced and sophisticated techniques of metrology and manufacturing, suitable for the student and the industry professional
Download or read book Advances in Optical Surface Metrology by Phase and Prescription Retrieval written by Aaron M. Michalko and published by . This book was released on 2020 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents advances in the application of phase retrieval techniques to optical metrology of spherical and freeform surfaces. We explore metrology configurations using transverse translation-diverse phase retrieval (TTDPR), in which translating subaperture illumination is projected on the test surface. The wavefront aberration, and from it surface error, can be reconstructed from measured reflected intensities. TTDPR is advantageous for freeform surface metrology due to its relatively simple hardware requirements and demonstrated accuracy in other fields. Through simulations we probe TTDPR performance as a function of various parameters including illumination beam softness, detector signal-to-noise ratio and position uncertainty of the illumination. We report on the laboratory measurement of a concave spherical test surface using TTDPR, which agrees with an interferometric measurement to 0:006[lambda] root-mean-square (RMS) with certain terms removed. We report on measurements of a concave freeform using TTDPR. Freeform surface reconstructions from two disjoint datasets agree to 13 nm RMS, or 0:02[lambda] RMS at [lambda] = 632:8nm. Next we explore configurations suitable for metrology of convex surfaces. We explore a configuration using converging source illumination and a moving test surface. We discuss a suitable algorithm, prescription retrieval, with which we directly reconstruct surface prescription terms from measured intensities using combined ray-tracing and diffraction modeling. A prescription retrieval algorithm is demonstrated through simulation and ultimately a convex surface measurement using the technique is demonstrated"--Pages xi-xii.
Download or read book Compressive Phase Retrieval written by Lei Tian (Ph. D.) and published by . This book was released on 2013 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recovering a full description of a wave from limited intensity measurements remains a central problem in optics. Optical waves oscillate too fast for detectors to measure anything but time{averaged intensities. This is unfortunate since the phase can reveal important information about the object. When the light is partially coherent, a complete description of the phase requires knowledge about the statistical correlations for each pair of points in space. Recovery of the correlation function is a much more challenging problem since the number of pairs grows much more rapidly than the number of points. In this thesis, quantitative phase imaging techniques that works for partially coherent illuminations are investigated. In order to recover the phase information with few measurements, the sparsity in each underly problem and ecient inversion methods are explored under the framework of compressed sensing. In each phase retrieval technique under study, diffraction during spatial propagation is exploited as an effective and convenient mechanism to uniformly distribute the information about the unknown signal into the measurement space. Holography is useful to record the scattered field from a sparse distribution of particles; the ability of localizing each particles using compressive reconstruction method is studied. When a thin sample is illuminated with partially coherent waves, the transport of intensity phase retrieval method is shown to be eective to recover the optical path length of the sample and remove the eect of the illumination. This technique is particularly suitable for X-ray phase imaging since it does not require a coherent source or any optical components. Compressive tomographic reconstruction, which makes full use of the priors that the sample consists of piecewise constant refractive indices, are demonstrated to make up missing data. The third technique, known as the phase space tomography (PST), addresses the correlation function recovery problem. Implementing the PST involves measuring many intensity images under spatial propagation. Experimental demonstration of a compressive reconstruction method, which finds the sparse solution by decomposing the correlation function into a few mutually uncorrelated coherent modes, is presented to produce accurate reconstruction even when the measurement suers from the 'missing cone' problem in the Fourier domain.
Download or read book Advanced Optical Instruments and Techniques written by Daniel Malacara Hernández and published by CRC Press. This book was released on 2017-11-22 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Optical Instruments and Techniques includes twenty-three chapters providing processes, methods, and procedures of cutting-edge optics engineering design and instrumentation. Topics include biomedical instrumentation and basic and advanced interferometry. Optical metrology is discussed, including point and full-field methods. Active and adaptive optics, holography, radiometry, the human eye, and visible light are covered as well as materials, including photonics, nanophotonics, anisotropic materials, and metamaterials.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Metrology and Optoacoustics in Nondestructive Evaluation of Materials written by Zinoviy Nazarchuk and published by Springer Nature. This book was released on 2023-05-23 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes the description, modeling and realization of new optical metrology techniques for technical diagnostics of materials. Special attention is paid to multi-step phase shifting interferometry with arbitrary phase shifts between interferograms, phase shifting and correlation digital speckle pattern interferometry, optical-digital speckle correlation, and digital image correlation, as well as dynamic speckle patterns analysis. Optoacoustic techniques can be treated as a separate branch of optical metrology and can solve many problems of technical diagnostics, including detection and localization of subsurface defects in laminated composite materials. The utility of such techniques can be increased by illumination of the object via acoustic waves at certain frequencies. Hence, an effective theoretical approach to the modeling of an elastic wave field interaction with an interphase defect, and to defect visualization using dynamic speckle patterns, is also included in this book. The experimental proof of the proposed approaches was achieved using a specially created hybrid optical-digital system for detection of different subsurface defects. This book is intended for engineers, researchers and students engaged in the field of nondestructive evaluation of materials and technical diagnostics of structural elements, hybrid optical systems, speckle metrology and optoacoustic imaging techniques.
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 2004 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digital Holography and Wavefront Sensing written by Ulf Schnars and published by Springer. This book was released on 2014-09-19 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly practical and self-contained guidebook explains the principles and major applications of digital hologram recording and numerical reconstruction (Digital Holography). A special chapter is designated to digital holographic interferometry with applications in deformation and shape measurement and refractive index determination. Applications in imaging and microscopy are also described. Spcial techniques such as digital light-in-flight holography, holographic endoscopy, information encrypting, comparative holography, and related techniques of speckle metrology are also treated
Download or read book Adaptive Optics for Industry and Medicine written by Christopher Dainty and published by Imperial College Press. This book was released on 2008 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume presents the very latest developments in non-astronomical adaptive optics. This international workshop, the sixth in a biennial series, was the largest ever held and boasted significant involvement by industry. Adaptive optics is on the verge of being used in many products; indeed, at this meeting, the use of adaptive optics in DVD players was disclosed for the first time. Sample Chapter(s). Liquid Crystal Lenses For Correction Of Presbyopia (586 KB). Contents: Wavefront Correctors and Control: Liquid Crystal Lenses for Correction of Presbyopia (G Li & N Peyghambarian); Woofer-Tweeter Adaptive Optics (T Farrell & C Dainty); Wavefront Sensors: A Fundamental Limit for Wavefront Sensing (C Paterson); Direct Diffractive Image Simulation (A P Maryasov et al.); Adaptive Optics in Vision Science: A Study of Field Aberrations in the Human Eye (A V Goncharov et al.); Characterization of an AO-OCT System (J W Evans et al.); Adaptive Optics in Optical Storage and Microscopy: Commercialization of the Adaptive Scanning Optical Microscope (ASOM) (B Potsaid et al.); Towards Four Dimensional Particle Tracking for Biological Applications (H I Campbell et al.); Adaptive Optics in Lasers: New Results in High Power Lasers Beam Correction (A Kudryashov et al.); Adaptive Optics Control of Solid-State Lasers (W Lubeigt et al.); Adaptive Optics in Communication and Atmospheric Compensation: Fourier Image Sharpness Sensor for Laser Communications (K N Walker & R K Tyson); Adaptive Optics System for a Small Telescope (G Vdovin et al.); and other papers. Readership: Industry- and university-level researchers in optics and laser physics.
Download or read book Fourier Ptychographic Imaging written by Guoan Zheng and published by Morgan & Claypool Publishers. This book was released on 2016-06-30 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates the concept of Fourier ptychography, a new imaging technique that bypasses the resolution limit of the employed optics. In particular, it transforms the general challenge of high-throughput, high-resolution imaging from one that is coupled to the physical limitations of the optics to one that is solvable through computation. Demonstrated in a tutorial form and providing many MATLAB® simulation examples for the reader, it also discusses the experimental implementation and recent developments of Fourier ptychography. This book will be of interest to researchers and engineers learning simulation techniques for Fourier optics and the Fourier ptychography concept.
Download or read book Refractometry written by Maksymilian Pluta and published by . This book was released on 1995 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1996 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
