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://ww

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