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A Class 3R laser is considered safe if handled carefully, with restricted beam viewing. With a class 3R laser, the MPE can be exceeded, but with a low risk of injury. Visible continuous lasers in Class 3R are limited to 5 mW. For other wavelengths and for pulsed lasers, other limits apply.
The X-ray Shutter is the most important safety device on a diffractometer â¢ X-rays exit the tube through X-ray transparent Be windows.â¢ X-Ray safety shutters contain the beam so that you may work in the diffractometer without being exposed to the X-rays.