Determination of initial ray configurations for asymmetric systems

摘要

When rays are traced through an optical system, it is generally desired to send a ray from a specific object point through a specific point on the aperture stop. For retationally symmetric systems,-it is common to replace the aperture step itself by the Gaussian entrance pupil. The analog for this procedure is described here for the case of asymmetric systems. This first-order procedure for determining the initial configuration of a ray can be supplemented by a method that adds a second-order correction. This second-order method, which typically yields better estimates for initial ray configurations, is also described. Examples illustrating the use of these methods are given. # 1997 Optical Society of America [S0740-3232(97)01012-0]