22 September 2011 Designing with φ-polynomial surfaces
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Abstract
Recent advances have made it viable to fabricate optical surfaces that are not rotationally symmetric using a new generation of diamond-turning machines. This new fabrication capability allows for surfaces whose departure from a sphere varies both radially and azimuthally in the aperture to be machined into an optical surface. This new degree of freedom allows for the design of unobscured optical systems that are truly non-symmetric by tilting the optical surfaces themselves. With this new design degree of freedom, the aperture and field of view can be pushed to yield an order of magnitude increase in aerial coverage over current production while maintaining a compact solution. In one particular case, to be presented, a diffraction limited (< λ/10), long wave infrared (LWIR), F/1.9, 10° full field of view sensor telescope is designed by introducing these non-symmetric surfaces into the optical surface prescription.
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Kyle H. Fuerschbach, Jannick P. Rolland, Kevin P. Thompson, "Designing with φ-polynomial surfaces", Proc. SPIE 8167, Optical Design and Engineering IV, 81670Z (22 September 2011); doi: 10.1117/12.904944; https://doi.org/10.1117/12.904944
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