The latest edition of the author's classic work in the field of Physical Optics incorporating revisions to the text and illustrations as well as references to recent contributions to the literature. The historical introduction is followed by detailed information clearly presented on all aspects of the subject including Basic Properties of the Electromagnetic Field, Geometrical Theory of Optical Imaging, Elements of the Theory of Aberrations and the Optics of Crystals. Reviews of previous editions: `Principles of Optics still stands out as the central source of information for any serious student or research worker of optical science.' Applied Optics `It can be recommended without reserve as the one that every serious worker in optics should have on his bookshelf.' Optics and Laser `As a result of the rigor, completeness, and elegance in the presentation of classical optics by Born and Wolf, the Principles of Optics will very likely remain for many more years the unsurpassed reference book for the mature, experienced, and serious optical scientist and engineer.' Circuits and Systems