Book reviews - The optics of ray, wavefronts and caustics

This book deals with the geometrical optics as developed from Fermat??s principle of least time. It is concerned with the tracking of ray and wave fronts through homogeneous and inhomogeneous media and throughout optical systems. Among the many books that treat the subject of geometrical optics, most fail to prove, in the authors view, the concrete link with the underlying mathematical foundation on which geometrical optical technology has been erected. For this reason, the authors dwell in some detail on the mathematical background required for geometrical optics and on the optical interpretation and application of mathematical theorems.