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A Green Laser Pointer Hazard



Jemellie Galang, Alessandro Restelli, Edward W. Hagley, Charles W. Clark


An inexpensive green laser pointer was found to emit 20 mW of infrared radiation during normal use. This is potentially a serious hazard that would not be noticed by most users of such pointers. We find that the problem derives from an unsafe design, and describe a simple method of testing for it using common household items.
Technical Note (NIST TN) - 1668
Report Number


green laser pointer, infrared radiation, hazard
Created August 2, 2010, Updated February 19, 2017