Radiant Source Models
Near-field luminance models for real light sources
Radiant Source Models (RSMs) provide the most accurate method of modeling the near-field output of real light sources for use in optical and illumination design software. They are used for light source analysis to investigate fine scale performance for light source design and development and for optical and illumination design to create accurate performance simulations. RSMs can be used by optical and illumination design engineers to simulate virtually any type of light source, including LEDs, fluorescent lights, arc, tungsten halogen and HID lamps.
Complete Information for Light Source Performance Evaluation
It is often difficult or impossible for an engineer to obtain all of the data necessary to accurately model a light source with traditional means, such as combining various shapes in optical design software and applying estimated luminance values to each component. An RSM avoids this limitation by measuring the true luminance field (both angular and spatial distributions) of a representative light source using a state-of-the-art Source Imaging Goniometer (SIG) system.
Accurate Ray Sets Using Importance Sampling Improves Optical Design
Using ProSource, RSMs can be used to generate ray sets for export to optical design software with full control over the number of rays generated (from a few million rays for a rough design to tens of millions of rays for a final, detailed design), the angular range of the rays, the total luminous flux of the ray set, and the ray origin.
Try it Yourself!
Demonstration versions of selected RSMs and ProSource software are available as downloads (see the link to downloads to the right). The Radiant Source Model demo files contain a sample data set that enables visual inspection of the model but not ray set generation. Ray generation requires that you purchase a full RSM file and a ProSource software licence.
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Contract Radiant Source Model measurement services are available from Pro-Lite