Optical methods, stimulated by the advent of inexpensive and reliable lasers, are assuming an increasingly important role in the field of engineering metrology. This book is aimed at industrial development engineers who wish to take advantage of optical methods. Requiring only a basic knowledge of optics, the text provides a compendium of practical information prepared by leaders in the field. All of the contributors have considerable practical experience in the application of optical methods to metrology. The book covers all of the major optical methods in use including traditional optical, laser-based and fibre optics techniques. A wide range of applications, ranging from measurement of distance and displacement in large-scale civil engineering projects to measurements of small manufactured components, are covered.