Comment on 'Color astrophotography with a 100 mm-diameter f/2 polymer flat lens', Appl. Phys. Lett. 126, 051701 (2025)

G. K. Skinner, J. F. Krizmanic

It is argued that the lens described in the paper commented upon has a focussing efficiency of less than 0.03% and an angular resolution for broadband radiation that is an order of…