spherical aberration conquered?

[chambeshi]

https://petapixel.com/2019/07/05/goodbye-aberration-physicist-solves-2000-year-old-optical-problem/

Links to the original scientific articles in Applied Optics
 https://www.osapublishing.org/ao/abstract.cfm?uri=ao-57-31-9341

https://www.osapublishing.org/ao/abstract.cfm?uri=ao-58-4-1010

see pdf here https://www.researchgate.net/publication/328536020_General_formula_for_bi-aspheric_singlet_lens_design_free_of_spherical_aberration

It does not appear to consider the behaviour of different wavelengths

[ArthurDent]

Great news. Too bad the details are behind a paywall.