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Excerpt from Optical Measuring Instruments: Their Construction, Theory, and Use I accede with pleasure to the request that I should write a Foreword for the book of my colleague, Dr. Martin, on Optical Measuring Instruments. More especially do I do so, because it was at my invitation that he originally turned his attention to the subject, when the Department of Optical Engineering and Applied Optics was founded at the Imperial College. In Dr. Martin's book the student will find, brought together for the first time, descriptions of a number of well-selected typical instruments, which embody and exemplify in their design, construction, and use, optical principles and devices of great interest and of wide application - information which hitherto it has been very difficult if not impossible to obtain except by reference to the records of the Patent Office, or those of learned societies. This bringing together of cognate matter should be of great value and convenience to everyone interested in the application of optical measuring means to instruments of precision generally. The limitations, for measuring purposes, of the human eye were humorously brought out by a friend of mine - a famous inventor of range-finders - when, some years ago, he deplored the fact that nature had not seen fit to impress our retinas with stereoscopic scales, by means of which ranges could be accurately determined without any instrumental aid. 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.
Optical measurement techniques have been stimulated in recent years by the advent of lasers and also by modern electro-optical devices. Despite the considerable research and developments in this field, these techniques are not widely appreciated by engineers, who are often unaware of their versatility. This book provides a single comprehensive source giving the basic science and technology involved in the implementation of these latest methods, for use by industrial and research engineers, in the solution of measurement problems and the design of measurement systems. The book covers the most recent and useful innovations and emphasises applications to practical problems. The emphasis in each chapter has been placed on the transducer aspect, i.e. on the instrumentation necessary to perform specific tasks, so that all the necessary components-basic theory, practical details and devices, application to actual problems· are included, as well as information concerning probable sensitivity, accuracy, etc. Simple explanations of complex physical phenomena have been used instead of rigorous treatments, the latter usually being available from the references associated with each chapter. Engineers and applied scientists are often faced with the measurement of a wide range of parameters, e.g. dimension, displacement, strain, force, pressure, torque, fluid flow, fluid level, time dependent effects, etc., and optical methods may seem inappropriate at first glance, but all those mentioned are capable of evaluation using optics and most physical parameters are susceptible to this type of measurement.
Lasers and Optical Instrumentation covers B.E., M.E., and M. Sc. (Electronics) degree courses. The text covers basic principles of lasers, types of lasers and their characteristics, laser applications in engineering and medicine. Further the book includes extensive coverage of optoelectronic devices, fibre optic communication and fibre optic sensors. The book includes many solved problems throughout the text to support the theoretical concepts and help in understanding of underlying principles. Review questions have been included at the end of each chapter to practise and self-study. Spread in Ten Chapters the book broadly covers: " Characteristics of lasers, mode locking, Q-switching, powerful lasers, frequency stabilisation " Overview of applications of lasers in science, engineering and medicine; reliability and safety aspects " Laser interferometer, laser strain gauges, laser Doppler velocimeter, laser ranging, mechanical cutting, welding, scribing, holography " Applications of Raman spectroscopy " Application of laser devices, optical fibers etc., in fiber optic communications " Integrated optics, radiation source, transmission link, detector " Fibre optical sensors, non-intrusively, displacements, pressure, temperature, high currents, angular velocity " Future perspectives nanophotonics, quantum dots, photonic crystals
Optical instruments, Optics, Environmental testing, Optical measurement, Optical properties of materials, Mechanical properties of materials, Chemical properties, Electrical properties of materials, Performance