About Laser “Speckle“

The video shows a simulation of a phenomenon called “speckle“. It’s best known as the granular interference pattern observed if we shine a coherent light of a laser at a diffuser. You can also observe it from a medium that contains small scattering particles. The simulation shows that it is caused by small phase differences that are introduced in the light by non-uniformity of a medium The green laser speckle image is taken from Wikipedia (copyrights Steve Jurvetson) and shown here under the Creative Commons license 2.0 () Simulations made using the Python code suplied by @DiffractionLimited #physics #light