Don’t buy cheap lasers!

Recently, a researcher in MD Hall purchased two inexpensive “pointing lasers” over the Internet to use in an experiment. ¬†Fortunately, before starting work with the lasers, the researcher consulted with the Laser Safety Advocate—who determined that the lasers were actually dangerous 1-watt infrared Class 4 lasers, and a serious threat to anyone in the room if they were used without controls. With a little 3-D printer magic, the LSA re-engineered the experimental apparatus so that the system was a safer Class 1, not even needing protective laser goggles. Read about the case in¬†Class 4 pointing lasers.