SOLUTION FOR FIRST-ORDER DESIGN OF A 2-CONJUGATE ZOOM SYSTEM

The first-order solution is analyzed with particularly initial conditi ons for a two-conjugate zoom system that consists of three lenses. We find the solution ranges of system parameters with the conditions in w hich the object/image and pupil magnifications of the middle lens are taken to be 1 and -1 or -1 and 1, and the system magnification is 1 or -1 at the mean position of zooming. Several examples are given to dem onstrate this analysis. (C) 1997 Society of Photo-Optical Instrumentat ion Engineers.