High Risk lasers must only be operated inside Designated Laser Areas under the direction of the Laser Responsible Officer (LRO).
All work involving High Risk lasers must be covered by risk assessments and Standing Orders.
High Risk laser beam paths must take account of the basic open beam path design principles for low risk laser plus the restricted open beam path design principles:
- Main and hazardous secondary beams are enclosed
- Lasers and optics that define the beam path are securely mounted
- Beam paths are as short as reasonably practicable with a minimum number of directional changes
- Open beam paths are clear of surfaces producing hazardous reflections
- Open beam paths not crossing walkways
Deviations from the basic and restricted beam path design principles will only be permitted after a thorough risk assessment has been made and with the approval of the LRO.
If access to the laser is uncontrolled then the key must be withdrawn from the switch when the laser is not in use and stored in a safe place.
Watches, rings and other items of jewellery that might specularly reflect a laser beam must be removed or covered.
Other items with shiny surfaces must be kept away from open beam paths. Optical benches must be kept free from clutter (N.B. Many surfaces which appear visually dull will be highly specularly reflecting for infrared radiation).
The individual who adjusts or introduces an optical component into a beam path is responsible for identifying and terminating each and every stray beam coming from that component.
Laser safety eyewear must be worn if the standing orders and LRO so instruct.
