QUASI-DISCRETE HANKEL TRANSFORM

A quasi-discrete Hankel transform (QDHT) is presented as a new and eff icient framework for numerical evaluation of the zero-order Hankel tra nsform. A discrete form of Parseval's theorem is obtained for the firs t time to the authors' knowledge, and the transform matrix is discusse d. It is shown that the S factor, defined as the products of a truncat ed radius, is critical to building the QDHT. (C) 1998 Optical Society of America.