Webinar Programs

A look into the world of Nonimaging Optics

The webinar will discuss why nominaging optics are the best option for illumination engineering (including solar energy concentration). The presentation starts with a very simple introduction to conservation of etendue (a basic concept in light energy transfer) and then proceeds to explore its consequences in illumination optics design. Why nonimaging optics used as collimators (for example in solid state lighting -using Light Emitting Diods, LEDs - flashlights) minimize size and overall volume, two decisive characteristics in minimizing cost and making these optics usable in demanding applications where space is limited. Why nonimaging optics used as concentrators (typically solar concentrators), maximize the entrance aperture size, thus maximizing energy collection. Why nonimaging optics maximize tolerances, making them more robust to errors in manufacturing and assembly. Finally, light sources may be heterogeneous and the presentation will briefly cover Kohler concepts that are able to handle these challenging light sources.

What You Will Learn:

A. Why nonimaging optics have the potential to minimize cost by:
  • minimizing optic size and volume in illumination (collimators)
  • maximizing collection aperture in solar energy concentration
  • maximizing tolerances to manufacturing and assembly errors
B. Handling heterogeneous sources

  • Julio Chaves, Optical designer, LPI
  • William James Cassarly, Senior Scientist, Synopsys.
  • Pablo Benítez, Associate Professor, UPM

Who Should Attend:
  • People in solid state lighting
  • People in solar energy concentration
  • Illumination engineers
  • Students

  • Beginner. All concepts are presented in simple terms and (hopefully) no nonimaging optics background is necessary to follow the presentation.

Seminar Information
Date Presented:
July 10, 2013 11:00 AM Eastern
1 hour
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A look into the world of Nonimaging Optics

Julio Chaves completed his undergraduate studies in physics engineering at the Instituto Superior Técnico (Higher Technical Institute), Universidade Técnica de Lisboa (Technical University of Lisbon), Lisbon, Portugal in 1995. He received his PhD in physics from the same Institute. Chaves did postgraduate work in Spain during 2002 at the Solar Energy Institute, Universidad Politécnica de Madrid (Technical University of Madrid). In 2003, he moved to California, United States, and joined Light Prescriptions Innovators, LLC (or LPI). In 2006, he moved back to Madrid, Spain, and since then has been working with LPI.

Chaves is the author of the book "Introduction to Nonimaging Optics" and main author of the chapter on "Solar concentrators" in the book "Illumination Engineering: Design with Nonimaging Optics". He developed new concepts such as stepped flow-line optics, ideal light confinement by caustics (caustics as flow lines), new Fresnel solar concentrators for multiple receivers, among others. He was the co-inventor of several patents and the coauthor of many papers in the field of nonimaging optics. He also participated in the early development of the simultaneous multiple surface design method in three-dimensional geometry.

Pablo Benítez got his PhD degree in Nonimaging Optics from UPM in 1998 and Bachelor degrees in Telecommunication Engineering from UPM and Mathematics from UCM, both in 1993. He has been an associate professor at UPM since 1999. His area of research ranges from optical design to manufacturing and applications, mainly concentrating on photo-voltaics and Solid State Lighting. He has coauthored the book "Nonimaging Optics" (Elsevier, 2004). He is co-inventor of the SMS optical design method, and in particular SMS3D for freeform optics design and freeform Köhler array devices

William Cassarly is a Senior Scientist with Synopsys (formerly Optical Research Associates). Before joining ORA 17 years ago, Cassarly worked at GE for 13 years, holds 47 US patents, and has worked extensively in the areas of illumination system design, sources, photometry, light pipes, and non-imaging optics. Bill was awarded the GE Corporate 'D. R. Mack Advanced Course Supervisor Award' for his efforts in the training of GE Engineers and is an SPIE Fellow.

Speaker Information
Pablo Benitez   [ view bio ]
William Cassarly   [ view bio ]
Julio Chaves   [ view bio ]
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