aplanatic lens

{{Short description|Optical device}}

An aplanatic lens is a lens that is free of both spherical and coma aberrations.{{citation|title=Introduction to Optics |volume=2 |first=F.L. |last=Pedrotti |publisher=Prentice Hall International |year=2005 |page=97}}. Aplanatic lenses can be made by combining two or three lens elements.{{citation |url=https://www.photonics.com/Articles/Understanding_Lenses_Aplanats_and_Achromats/a22346 |title=Understanding Lenses: Aplanats and Achromats |magazine=Photonics Spectra |date=July 2005 |first=Emily |last=Kubacki |accessdate=2019-12-10}}. A single-element aplanatic lens is an aspheric lens whose surfaces are surfaces of revolution of a cartesian oval.{{citation|title=Lenses and waves: Christiaan Huygens and the mathematical science of optics in the seventeenth century|volume=9|series=Archimedes, New studies in the history and philosophy of science and technology|first=Fokko Jan|last=Dijksterhuis|publisher=Springer-Verlag|year=2004|isbn=978-1-4020-2697-3|pages=13–14|url=https://books.google.com/books?id=cPFevyomPUIC&pg=PA13}}.