This book has been written to provide research workers with an introd- tion to several optical techniques for new applications. It is intended to be comprehensible to people from a wide range of backgrounds - no prior optical or physics knowledge has been assumed. However, sufficient technical details have been included to enable the reader to understand the basics of the techniques and to be able to read further from the ref- ences if necessary. The book should be as useful to postgraduate students and experienced researchers as those entering the bioengineering field, irrespective of whether they have a technical or clinical background. It has been prepared with an awareness of the inherent difficulties in und- standing aspects of optics which, in the past, have precluded practical application. The contents address a broad range of optical measurement techniques which have been used in biomechanics, techniques characterized as n- contacting and non-destructive. Theoretical outlines and practical advice on gaining entry to the fields of expertise are complemented by biomec- nical case studies and key literature references. The aim is to present each technique, to appraise its advantages and capabilities and thereby to allow informed selection of an appropriate method for a particular app- cation. It is anticipated that research workers will be assisted in est- lishing new methodologies and gain first-hand experience of the techniques.