Sheppard Holt 16.1 Introduction The Eikonal and the Eikonal Equation Geometrical Optics as a Zero-wavelength Approximation Fermat's Principle and Snell's Laws Phase Analysis and Phase Synthesis Power Flow in Ray Tubes Power Distribution in the Aperture Power Distribution in the Focal Region Power Distribution in the Far Field Reflection from a Conducting Surf ace Ray Collimation and Off-focus Feeding Congruences and the Equal-path-length Law Focal Surfaces General Comments on Focal Surfaces 28 Appendix A: Principal Normal Radii of Curvature, Principal Directions, Principal Planes, and Lines of Curvature 30 Appendix В: Geometrical Optics Power Flow in a Source-free, Nonconducting, Isotropic, Homogeneous Medium 31 Problems 33 References 34 CHAPTER 17 REFLECTOR С J.
2 Foreword Preface v vii CONTENTS CHAPTER 16 WAVE FRONTS, RAYS, AND FOCAL SURFACES F.
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