Why is the nominal criteria different from the value reported elsewhere?
This article is also available in Japanese. Question: Why is the nominal criteria in the tolerance output different from the value which is reported elsewhere in ZEMAX, such as the merit function or an analysis feature? There are a few reasons why the reported nominal criteria from the tolerancer may be different from that of the value reported elsewhere in ZEMAX: • When computing the nominal criteria in the tolerance analysis, ZEMAX considers any compensators which are defined. This means that ZEMAX optimizes for the smallest criteria value using the defined compensators as variables. The merit function or any analysis feature in ZEMAX on the other hand, is evaluated without any compensator adjustment. • Sampling methods and sampling sizes may be different. In constructing physically significant merit functions for a selected criterion, ZEMAX uses Gaussian Quadrature pupil sampling. Some analysis features in ZEMAX use Rectangular Array sampling, which may result in a slightly differen
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