"Version: 20251201"--Title page verso.Includes bibliographical references.1. Optical physics for laser materials processing -- 1.1. Electromagnetic theory of light propagation -- 1.2. Paraxial approximation -- 1.3. The eikonal equation--material polarization approach -- 1.4. The eikonal equation--Fermat's principle approach -- 1.5. Propagation of electromagnetic waves through matter. Lorentz os…