丁香园AV

Safety guidelines for laser pointers:

• Choose laser pointers labeled as Class 2. 
• Avoid using green laser pointers due to high eye sensitivity to green light and risk of IR exposure.
• Choose a laser pointer that stays on only when you apply pressure with your fingers.  This will prevent the beam will never be left on by accident. 
• Only use laser pointers with a clear warning label.
• Never look directly into the laser beam or point it at another person.
• Never aim a laser pointer at surfaces that reflect light, such as mirrors or mirrored/shiny surfaces. 
• Do not use collecting optics such as lenses when using a laser pointer.

Please note that Class 3B or Class 4 handheld lasers are illegal in Canada according to recent legislative changes.

When engineering or other procedural/administrative controls are inadequate to eliminate potential exposure in excess of the applicable maximum permissible exposure (MPE), protective eyewear specifically designed for protection must be administratively required and their use enforced within the nominal hazard zone (NHZ) for Class 3B lasers and Class 4 lasers.

The principal investigator is responsible for ensuring that appropriate protective eyewear is available and worn by personnel within the Nominal Hazard Zone of Class 3B and Class 4 lasers.

The principal investigator must assure that the laser protective eyewear is clearly labeled with the optical density and the wavelength(s) for which protection is afforded.

Protective eyewear must be periodically cleaned and inspected for integrity (cracks, discoloration, etc.). Eyewear in suspicious condition should be tested for acceptability or discarded and replaced.

Please contact the Laser Safety Officer for help in choosing the appropriate eyewear.