The answers are not obvious since a comprehensive, detailed source model would mean: how much light does the source send from each point, into each direction, at each wavelength? In engineering language a source model means knowing spectral radiance as function of location, direction and wavelength, which is a nightmarishly complex five-dimensional function. Therefore, the key is knowing how, when, and to what extent to simplify.

In this webinar hosted by the OSA NonImaging Optical Design Technical Group, Julius Muschaweck will explain what spectral radiance is and lay out the various options: point sources, extended sources, spatial and angular apodization, and volume sources. The webinar will discuss ray data sources, explain how they are generated, and how they should be used.

The webinar also will include live examples using LightTools software. Finally, Julius will talk about his "Christmas wish": merging multispectral ray data, near field goniometry data and a CAD model into a single file. This is possible today, but such high quality source models will become available only when LED vendors and software vendors are driven by their customers to provide them.

What You Will Learn:

• What source modeling is all about, what your options are, and how/why to choose one option over another
• What the inevitable simplifications do to your simulation results
• How to obtain ray data files & what you need to do with them before you can use them in your models

Who Should Attend:

• Engineers & scientists in industry who do optical design for illumination
• Optical scientists, who know a lot about classical optics but not enough about illumination optics
• Students of optics, who want a deeper understanding of illumination optics

About the Presenter: Julius Muschaweck, JMO GmbH

Julius Muschaweck, a German physicist, has been working on optical design for illumination for over twenty years. After a stay as Visiting Scholar at the University of Chicago with Prof. Roland Winston (well known as the originator of Nonimaging Optics), he was co-founder and CEO of OEC, an optical engineering service which pioneered freeform optics. Later, at OSRAM, where he held the position of Senior Principal Key Expert (the highest rank in the OSRAM/Siemens expert career), he coordinated the over 100 optical designers within OSRAM world-wide. He then joined ARRI, the leading movie camera and lamp head maker, as Principal Optical Scientist. Julius Muschaweck now works as an independent consultant, providing illumination optics solutions to industry clients, teaching courses on illumination optics, and writing about the subject. He is the author of over 25 scientific papers and the inventor of over 50 patent applications. He also loves to go hiking with his wife and their dog.