Optical diffraction patterns and almost-holograms made with a MOPA laser engraving machine

Video Description

I use a Cloudray MOPA fiber laser to make diffraction gratings, multi-color images from bitmaps, and almost-holograms on stainless steel sheets. I inspect the gratings with an electron microscope, and also create images made from diffraction grating "pixels" where each pixel has controllable pitch and angle. Machine featured in the video: Cloudray GM-100 NEO — https://www.cloudraylaser.com/products/cloudray-litemarker-gm-series-neo-100w-autofocus-mopa-fiber-laser-engraver-with-built-in-camera https://github.com/benkrasnow/MOPA_Laser_Stainless_Colors https://github.com/benkrasnow/MOPA_Laser_Diffraction_Gratings Some interesting parallels to abrasion holograms. http://amasci.com/amateur/holo3.html Laser induced periodic structuring (with a polarized beam) https://www.mdpi.com/2079-4991/10/10/1950 https://www.patreon.com/c/AppliedScience