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Proceedings Paper

New freeform NURBS imaging design code
Author(s): Michael P. Chrisp
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Paper Abstract

A new optical imaging design code for NURBS freeform surfaces is described, with reduced optimization cycle times due to its fast raytrace engine, and the ability to handle larger NURBS surfaces because of its improved optimization algorithms. This program, FANO (Fast Accurate NURBS Optimization), is then applied to an f/2 three mirror anastigmat design. Given the same optical design parameters, the optical system with NURBS freeform surfaces has an average r.m.s. spot size of 4 microns. This spot size is six times smaller than the conventional aspheric design, showing that the use of NURBS freeform surfaces can improve the performance of three mirror anastigmats for the next generation of smaller pixel size, larger format detector arrays.

Paper Details

Date Published: 17 December 2014
PDF: 6 pages
Proc. SPIE 9293, International Optical Design Conference 2014, 92930N (17 December 2014); doi: 10.1117/12.2073081
Show Author Affiliations
Michael P. Chrisp, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 9293:
International Optical Design Conference 2014
Mariana Figueiro; Scott Lerner; Julius Muschaweck; John Rogers, Editor(s)

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