This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Airypattern.svg Vectorized version of Image Airypattern Created in Adobe Illustrator and then edited to incorporate gradient stops calculated in Chipmunk Basic see below for source code Sakurambo en ' Positions of st zeros in bj data data data data data data data data data data ' dim zero for to read