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:
Light projection apparatus.. en Three vignettes demonstrating light projection apparatus Courtesy of the National Library of Medicine Images from the History of Medicine IHM nlm nih gov Also showcased in the book Hidden Treasure New York NY Blast Books HMD call number WZ Zo Zahn Johann Oculus artificialis teledioptricus