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Optimization of WFOV telescopes using NURBS-based Freeforms
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Abstract
Freeform optics offer the next evolution in classical design by enabling asymmetric bending of surface shapes to enhance aberration correction. MIT-Lincoln Laboratory has been developing a unique method for design by natively optimizing these shapes as NURBS surfaces, treating them as variable point clouds rather than polynomial expansions. The flexibility of NURBS allows them to take on any shape, allowing a system to reach its best optimized state. Recently, Lincoln Lab has added capability for optimizing afocal systems, including prototyping a reflective, wide field of view 150mm aperture telescope with diffraction limited performance. In this presentation, we will show the process for working with NURBS raytracing, from concept through assembly, integration, & testing of a system and how it is adapted for focal and afocal systems.
Speakers Bio
Dr. James Johnson has worked on all manner of optics from 1mm to 8.4m in size. He is a Technical Staff member at MIT Lincoln Laboratory in the Optical Engineering Group. He holds a B.S. from Purdue University in Applied Physics and an M.S. & Ph.D. from the University of Arizona’s College of Optical Sciences where he helped with the fabrication of the first Giant Magellan Telescope mirror and Rubin Observatory primary/tertiary monolith. His current work focuses on novel optical designs in the UV-LWIR, freeform optical systems, and advanced metrology. Prior to joining MITLL, he worked at UTC Aerospace Systems (Goodrich ISR) developing high-altitude ISR cameras. He holds 7 U.S. Patents, more than a dozen peer-reviewed papers and proceedings, and is a member of Optica and a Senior Member of SPIE.
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