Adding keystone distortion, in addition to anamorphism, to an off-axis asphere dramatically improves the ability of the surface to correct aberrations.
© 2010 OSA, SPIE
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.1250) Optical design and fabrication : Aspherics
(220.2740) Optical design and fabrication : Geometric optical design
J. R. Rogers, "A Comparison of Anamorphic and Keystone-Distorted Surface Types for Aberration Correction," in International Optical Design Conference and Optical Fabrication and Testing , OSA Technical Digest (CD) (Optical Society of America, 2010), paper IMC2.
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