An f/3.5, 24-in. aerial-lens design has been evaluated heterochromatically to test the relative merits of geometric versus wave-optical transfer calculations. Both methods yielded substantially the same results for the lens under test. The geometric calculation required about
min of high-speed computer time while more than 3 h of equivalent computer time was required to make the diffraction calculations.
© 1965 Optical Society of America
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