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A comment on Engineers produce a fisheye lens that’s completely flat. Parent comment

Re:Engineers produce a fisheye lens that’s completely flat by Learning2-2 on Saturday September 19, 2020 @02:45AM (#24525672)
Here is a video explaining the difference between a Fresnel lens and a photon sieve: Photon sieves used to visualise optical wave front propagation

https://www.youtube.com/watch?v=TshYfYIxR9E

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