https://www.thehenryford.org/collections/explore/artifact/134547
Bell Laboratories Helium-Neon Gaseous Optical Maser, 1963
This is a demonstration device to promote the helium-neon gaseous optical maser. "Maser" was an early term used by Bell Laboratories, who were interested in...
bell laboratorieshelium neonoptical masergaseous1963