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Fulltext: https://www.researchgate.net/publication/328536020_General_formula_for_bi-aspheric_singlet_lens_design_free_of_spherical_aberration/download https://w

• TheRealPomax 7y ago
  And to anyone who is averse to reading dense, long papers: it's only 4 pages long, and a quarter is pictures. It's heavy on the maths, because of course it has to be, but there isn't a single integral in the entire thing. It's remarkably accessible to anyone who took an introductory calculus course.
• JadeNB 7y ago
  Or on the arXiv: https://arxiv.org/abs/1811.03792 https://arxiv.org/abs/1811.03792 . It also looks like the first author wrote up a local article which seems to have substantially, umm, inspired the linked write up: https://transferencia.tec.mx/en/2019/02/21/eureka-they-find-the-formula-to-solve-an-old-optical-problem https://transferencia.tec.mx/en/2019/02/21/eureka-they-find-... .