ZEMAX® lens design program, the one used in this book [Practical Computer-Aided Lens Design by Gregory Hallock Smith], is available for sale from Focus Software at
www.focus-software.com.
CODE V® lens design program is available for lease from Optical Research Associates at
www.opticalres.com.
OSLO LT® is available at
www.sinopt.com as a free download (4MB) and is full-featured except that it limits the user to 10 surfaces.
SYNOPSYS® lens design program (SYNthesis of OPtical SYStems) is a powerful Windows lens design program with a downloadable trial version available at
www.gwi.net/osd