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Author: Robert Samuel Heath
Publisher:
ISBN:
Category : Geometrical optics
Languages : en
Pages : 386
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Author: Robert Samuel Heath
Publisher:
ISBN:
Category : Geometrical optics
Languages : en
Pages : 386
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Author: Robert Alfred Herman
Publisher:
ISBN: 9781332589784
Category : Science
Languages : en
Pages : 360
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Book Description
Excerpt from A Treatise on Geometrical Optics In this treatise one of my aims has been to introduce a new method of determining the properties of a symmetrical optical instrument, in which the angle of divergence of a small pencil, rather than any coordinate of its origin, has been adopted as the leading feature. By this method, which is implicitly contained in Cotes's well-known theorem of the apparent distance, all the cardinal properties, notably the power of the system, follow immediately from the application of a simple geometrical formula. Although that theorem dates from the middle of the eighteenth century, yet the present method needs the help of Helmholtz's theorem to render it complete; hence the priority of the proof of the existence of the cardinal points rests with Gauss. But the analytical method adopted by the latter tends, in my opinion, to disguise the essential fact that geometrical foci exist only as a first approximation; and in any particular case a lengthy calculation is necessary to obtain the final convergent of the continued fraction on which his results depend. The simplification that results from the use of the angle of divergence will, I think, be clear on reference to Chapter V. and to the chapter on Aberration. I have attempted to obviate as far as possible the difficulties of sign that arise in connection with the directions in which distances are to be measured by the convention that all lengths on the same straight line are to be treated as algebraical quantities, and, where an origin of light is the origin of measurement, by taking the direction in which the light travels as positive. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Robert Samuel Heath
Publisher:
ISBN:
Category : Geometrical optics
Languages : en
Pages : 264
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Author: William Steadman Aldis
Publisher:
ISBN:
Category : Geometrical optics
Languages : en
Pages : 212
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Author: R. S. Heath
Publisher:
ISBN: 9781332616183
Category : Science
Languages : en
Pages : 256
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Excerpt from An Elementary Treatise on Geometrical Optics The present work is essentially an abridgment of my larger treatise on Geometrical Optics, and is primarily intended for the use of students who require an exposition of the principles of Optics and their application in the use and construction of optical instruments, without very extended and complicated mathematical analysis. It is elementary, inasmuch as it uses no mathematics beyond trigonometry. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: William N. Griffin
Publisher:
ISBN:
Category : Ophthalmology
Languages : en
Pages : 210
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Author: William N. Griffin
Publisher:
ISBN: 9781331951797
Category : Science
Languages : en
Pages : 190
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Excerpt from Treatise on Optics 1. When a material object is presented before us, we become by vision sensible of its existence and figure. In such a case light is said to be propagated from the object to our eyes, and the science of Optics has for its design the examination of the circumstances of such propagation. The science is divided into Geometrical and Physical Optics. In Geometrical Optics the circumstances of the transmission and modification of light are computed on certain laws established by experiment; in Physical Optics these laws are accounted for on hypotheses of the structure of bodies, and of the matter filling the space in which they are placed. In a similar manner in Geometrical Astronomy the phenomena of heavenly bodies are calculated on observed laws which their apparent motions are found to obey; in Physical Astronomy these apparent laws are shewn to result from the hypothesis of Gravitation. The former branch of the science is the subject of the present treatise, wherein from certain laws established by experiment under simple circumstances, the course of light under more complex circumstances is computed, and the results applied to the construction of Optical Instruments. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Stephen Parkinson
Publisher:
ISBN:
Category : Geometrical optics
Languages : en
Pages : 388
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Author: Thomas Holmes Blakesley
Publisher: Forgotten Books
ISBN: 9780364053195
Category : Science
Languages : en
Pages : 142
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Excerpt from Geometrical Optics: An Elementary Treatise Upon the Theory, and Its Practical Application to the More Exact Measurement of Optical Properties The Colleges of the Technical Institute and the Royal Naval College are pervaded with it. The testing of optical apparatus, as instituted by the Royal Society at Kew, would be greatly improved by recognizing it, and the marked defects in the scales of our Ordnance Maps, in the production of which photographic processes are employed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Richard Potter
Publisher: Forgotten Books
ISBN: 9780260581624
Category : Science
Languages : en
Pages : 172
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Book Description
Excerpt from Elementary Treatise on Optics: Containing All the Requisite Propositions Carried to First Approximations; With the Construction of Optical Instruments, for the Use of Junior University Students In the present First Part of Geometrical Optics, the theory of optical instruments will be discussed, by taking the propositions to first approximations only; and in the Second Part the proposi tions will be discussed to second approximations, and the more corrected forms of some of the instruments treated of. This method involves the advantages of a more elementary treatise in the First Part, and a higher one in combining the two Parts. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
