Laser safety

Hazards of laser light

Laser light, because of its intensity and wavelength poses hazards not associated with light from conventional sources. SPI lasers are high power infrared lasers that can present a serious hazard to the eyes, the skin and can start fires. The risk of injury and fire is increased as the laser beam is not visible.

The greatest concern when using all lasers is eye safety. SPI lasers operate either in the 1060-1100nm wavelength region or around 1550 nm. They contain optical pumps that are themselves high power lasers operating between 900 and 1000 nm.

  • 900 – 1000 nm - Permanent damage to the retina of the eye
  • 1060 – 1100 nm - Permanent damage to the retina of the eye
  • > 1400 nm - Temporary damage to the cornea of the eye

Most SPI lasers are class 4 lasers (IEC/EN 60825-1). In addition to the direct beam, both specular reflections (reflections from mirror like surfaces) and diffuse reflections (reflections from matt surfaces) are also hazardous. Depending on the degree of collimation of the laser beam these hazards may operate over distances of many meters.

SPI laser beams can burn skin and clothing. They can ignite flammable substances such as solvents and paper.

  

Precautions

  • Observe all safety precautions in the Operating and Service Manuals.
  • SPI lasers are designed to be operated with all covers in place. Do not operate with covers removed. This may result in increased risk of injury from laser radiation or live electrical conductors.
  • Users are strongly recommended to enclose the laser beam where reasonably practicable.
  • Limit access to the laser to trained staff who are aware of the hazards.
  • Exercise extreme caution when using solvents in the vicinity of the laser. Keep quantities as small as possible and store in a suitable fireproof container.
  • If the laser beam is not fully enclosed, enclose the whole laser in a room with access controlled to trained staff that require access to the laser.
  • If the laser beam is not fully enclosed, those in the room should wear laser safety eyewear as described in the operating instructions.

  

Other laser safety sites