[ararar]

I thought they were going to talk about diffractive optic telescopes which require neither lenses or mirrors. See more here https://str.llnl.gov/str/March03/pdfs/03_03.2.pdf. Someone did not do their research! The aragoscope is mentioned in the Spacetime episode mentioned elsewhere here.

[planteen]

There is also a sensor stack for different wavelengths that is actually realized, not a pipe dream like the article makes it seem: https://en.wikipedia.org/wiki/Foveon_X3_sensor