Developing analytic models of system stray light performance (even ones with very limited fidelity) results in complicated equations with many terms. For this reason, most nontrivial stray light problems today are analyzed by ray tracing in stray light analysis software. A list of these programs is included in this chapter. These programs have many features and can be difficult to use. This chapter provides guidance in the most efficient ways of using them to perform stray light analysis and design. As mentioned previously, this chapter will not go into the details of how to use a given software package; for this information, please contact the software vendor.
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