ZEMAX Development Corporation thanks Opsira GmbH for providing the source data used in this article.

The most accurate way to model sources in ZEMAX is to use measured sources, like Radiant Imaging's Radiant Sources, and Opsira's Luca'Raymaker. Our article on how to model LEDs describes the use of Radiant Sources in detail. This article describes how to enter Opsira source data.