Simplified Design of Freeform Optics for Beam Shaping and Illumination Applications

Hosted By: NonImaging Optical Design Technical Group

13 June 2017, 9:00 - 10:00

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In this webinar hosted by the OSA NonImaging Optical Design Technical Group, Dr. Zexin Feng of Beijing Institute of Technology will present his talk discussing simplified design of freeform optics for beam shaping and illumination applications. Freeform optics design for producing a prescribed irradiance distribution from a given light source is a very difficult inverse problem. The complexity can be greatly simplified under the paraxial approximation and thin lens approximation, and Geometrical and physical optical design methods can be combined to create high-precision beam profiles. For those cases when the paraxial approximation and thin lens approximation cannot be applied, a ray mapping approach can be used to flexibly construct a variety of freeform optical structures that can produce challenging irradiance distributions in the framework of geometrical optics.

What You Will Learn: 

  • A general introduction to the inverse optical design problem
  • An overview of different design strategies based on geometrical and physical optics
  • Explanation of the ray mapping approach to design freeform surfaces

Who Should Attend:

  • Researchers and optical designers from academia and industry that are interested in (freeform) illumination optics


Dr. Zexin Feng, Beijing Institute of Technology

Dr. Zexin Feng currently focuses on freeform optics design for illumination, beam shaping and imaging applications. He received his Ph.D. in Electronic Science and Technology from Tsinghua University in June, 2012. He stayed as a post-doctor in the field of Optical Engineering at Tsinghua University until April, 2014. Afterwards, he went to the USA and performed two years of postdoctoral work at College of Optical Sciences, University of Arizona. He is now an assistant professor of School of Optoelectronics, Beijing Institute of Technology.