aberration

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Aberrations Of Optical Systems

Author : W.T Welford
ISBN : 0852745648
Genre : Technology & Engineering
File Size : 65. 22 MB
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Although the subject of optical design as a branch of applied physics is over one hundred years old, the use of aberration theory has changed considerably. Aberrations of Optical Systems covers elementary optics and aberration theory of various optical systems, including the use of nonaxially symmetric systems and diffractive optical elements in complex designs, such as head-up displays and the increasing use of scanning systems with laser illumination. The book provides the complete range of mathematical tools, formulae, and derivations needed for understanding the process of optical design and for planning optical design programs. While the treatment is mainly based on geometrical optics, some excursions into physical optics are made, particularly in connection with the problems of optical tolerances.

Aberration

Author : Peter Kulas
ISBN : 1470155745
Genre :
File Size : 67. 70 MB
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Ayden, a gay teenager who can wield both telepathic and telekinetic abilities, is on the run with a fortune hunter that he is not sure he can trust. Panic over whether a fifteen year armistice will end as a megalomaniac ruler resumes his genocidal actions of the past surrounds Ayden at every turn and motivates everyone's desire to have him in their thrall. Ayden tries to sort out who he is, where he comes from, and how he fits into the chaotic world around him.For you see, Aberration is not a novel about a character who is gay and becomes a hero. It's a novel about a character who is gay and therefore can be the hero.

Aberration Corrected Imaging In Transmission Electron Microscopy

Author : Rolf Erni
ISBN : 9781783265305
Genre : Technology & Engineering
File Size : 84. 2 MB
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Aberration-Corrected Imaging in Transmission Electron Microscopy provides an introduction to aberration-corrected atomic-resolution electron microscopy imaging in materials and physical sciences. It covers both the broad beam transmission mode (TEM; transmission electron microscopy) and the scanning transmission mode (STEM; scanning transmission electron microscopy). The book is structured in three parts. The first part introduces the basics of conventional atomic-resolution electron microscopy imaging in TEM and STEM modes. This part also describes limits of conventional electron microscopes and possible artefacts which are caused by the intrinsic lens aberrations that are unavoidable in such instruments. The second part introduces fundamental electron optical concepts and thus provides a brief introduction to electron optics. Based on the first and second parts of the book, the third part focuses on aberration correction; it describes the various aberrations in electron microscopy and introduces the concepts of spherical aberration correctors and advanced aberration correctors, including correctors for chromatic aberration. This part also provides guidelines on how to optimize the imaging conditions for atomic-resolution STEM and TEM imaging. This second edition has been completely revised and updated in order to incorporate the very recent technological and scientific achievements that have been realized since the first edition appeared in 2010.

Aberration Theory Made Simple

Author : Virendra N. Mahajan
ISBN : 0819405361
Genre : Technology & Engineering
File Size : 75. 37 MB
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This book provides a clear, concise, and consistent exposition of what aberrations are, how they arise in optical imaging systems, and how they affect the quality of images formed by them. The emphasis of the book is on physical insight, problem solving, and numerical results, and the text is intended for engineers and scientists who have a need and a desire for a deeper and better understanding of aberrations and their role in optical imaging and wave propagation. Some knowledge of Gaussian optics and an appreciation for aberrations would be useful but is not required.

Optical Aberration Coefficients

Author : Hans Adolph Buchdahl
ISBN : UOM:39015017232417
Genre : Science
File Size : 82. 14 MB
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Partial Coherence And Aberration Effects On Speckle

Author :
ISBN :
Genre :
File Size : 84. 33 MB
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Fundamentals Of Practical Aberration Theory

Author : Yoshiya Matsui
ISBN : 9789814504393
Genre : Science
File Size : 90. 66 MB
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At present, although most of the optical design processes are automated with the aid of computer software, the fundamental question of how we can generate the initial optical configuration such that it can be dealt with by the computer remains. The answer can only be found in applying techniques based on the aberration theory. Previous works have explored this subject matter. None, however, has covered the full extent of first deriving the aberration theory and then illustrating with the help of various kinds of actual examples how it can be applied effectively to practical design problems. This book is significant in its attempt to put theory into practice for the first time to provide new insight and knowledge to its readers. Contents:Introduction:The Role of the Aberration TheoryParaxial Theory as the Basis for Aberration TheoryApplication of Paraxial Theory to Lens DesignDerivation of Aberration Theory:Characteristic Function of HamiltonOutline of the Herzberger TheoryPractical Aberration Theory and Its Formulae:Transformation of the Herzberger Aberration Theory into Practical FormNormalization of Aberration CoefficientsAberration Coefficients for a Thin Lens SystemIntrinsic Coefficients and the Characteristic MatrixCase Studies:Determination of the Initial Configuration of an Optical System and the Application of Aberration TheoryDetermination of a Configuration for a Telephoto-Type LensDetermination of Configuration in a TripletDesign of a Catadioptric SystemHelmholtz-Lagrange InvariantDerivation of Formulae for Calculating Aberration Coefficients for Individual Surfaces in an Optical SystemDerivation of Formulae Calculating Chromatic Aberration Coefficients for Individual Surfaces in an Optical SystemInitial Values of Paraxial Rays for Calculating Aberration Coefficients Readership: Optical designers and engineers. keywords:Optical Design;Lens Design;Paraxial Theory;Aberration Theory;Aberration Coefficient;Petzval Coefficient;Lateral Aberration;Longitudinal Aberration;Helmholtz-Lagrange Invariant;Thin Lens System

Spherical Aberration In Thin Lenses

Author : T. Townsend Smith
ISBN : UOM:39015086550970
Genre : Science
File Size : 38. 71 MB
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All Aberration

Author : Terese Svoboda
ISBN : 9780820334608
Genre : Poetry
File Size : 82. 81 MB
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These are poems of family, of romantic hope and disappointment, of parenthood, and of grief that move from a childhood in Nebraska in which a father strides into a ripe wheat field; to the parks and parking lots of New York City, the interchangeable landscapes of suburban America, and the more sensual environment of secluded water; to little traveled parts of Africa and the Pacific where our customs and passions are refracted into shapes that are sometimes beautiful, sometimes grotesque. Terese Svoboda writes of a world in which the reassuring simplicity remembered from childhood is difficult to recover. Outside of this vision of the past, all present life seems an aberration--an existence where violence can supplant love, families break apart, a child dies. All Aberration received a starred review in Publishers Weekly, a lead in Contemporary Poetry 1986 and a Notable Book nomination by the American Library Association. It was written during stays at Yaddo, MacDowell and Ossabaw, and received the benefit of a Creative Artists Public Service grant in 1982. Its poems first appeared in such magazines as Harper's, The Nation, Paris Review, and Ploughshares.

Aberration In Modern Poetry

Author : Lucy Collins
ISBN : 9780786489015
Genre : Literary Criticism
File Size : 33. 85 MB
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"This critical work considers the role played by elements that might be considered aberrational in a poet's oeuvre. With an introductory essay exploring the nature of aberration, these fourteen contributions investigate the work of major 20th-century poets from the U.S., Britain, Ireland, Australia and New Zealand"--Provided by publisher.

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