The video shows how the optical wave front of a laser beam can be shaped by means of DIY photon sieves. It also shows how the quality and sharpness of the focal point in a diffraction pattern can be influenced by the number of diffractive apertures in the photon sieve surface.

Contents:
00:00 General intro
00:43 Photon sieves explained
04:21 Manufacturing of photon sieves
06:27 Photon sieve diffraction series
10:05 Time-resolved visualizations explained

Many thanks to Michal Miler for bringing the photon sieve to my attention.

Reference to the article on achromatic photon sieves by Chiongxi Zhou:https://www.researchgate.net/publicat...

More on the maskless wafer stepper project (link to playlist) :    • DIY Maskless Wafer Stepper  
If you are interested in maskless wafer steppers or how to build one yourself, make sure you check out this great video by Sam Zeloof as well:    • Maskless Photolithography Stepper for...  

The royalty free slo mo clip of the water wave at the end of the video could be displayed thanks to the video published on the Jim Quiter channel:    • HD Slo mo Water Drop Royalty Free