Refined Ray Tracing inside Single- and Double-Curvatured Concave Surfaces - Balamati Choudhury - Bog

This book describes the ray tracing effects inside different quadric surfaces. Although numerically-specified surfaces and even non-uniform rational basis spline (NURBS) can be used for modeling such surfaces, for most practical EM applications, it is sufficient to model them as quadric surface patches and the hybrids thereof.