Translated from the French edition by the author and thoroughly updated, this book gives an introduction to modern optics at an advanced level. The unique approach, inspired by Richard Feynman, will benefit both students and lecturers alike. The book received the Arnulf-Francon Award of the French Optical Society for excellence in optics teaching. The author is Professor Emeritus at Institut National Polytechnique de Grenoble, France, and active optics consultant.