Presentation on theme: "Basic Laser Safety version 2 last updated March 2014"— Presentation transcript:
1 Basic Laser Safety version 2 last updated March 2014
2 Course content What is the general nature of laser radiation? What are the laser health hazards?Why are there different laser classes and warning labels?What are the University’s laser hazard controls?What are the laser hazard controls for non-routine activities and emergencies?An Introduction to the University Laser Safety Standard
3 Course Aims Laser users will be able to: Describe laser radiation List parts of the body at riskIdentify laser injuries.Identify different class of lasersRecognise laser warning symbolsList common laser safety controlsFind to the University Laser Safety Standard
5 Source: HPA Radiation at Work Laser Information Poster.
6 Why is laser light different? Light emitted from laser is manmade. Laser beam properties:MonochromaticVery intenseLow divergenceCoherent.
7 Laser health effectsLasers that emit ultraviolet (UV) and infrared (IR) wavelengths can cause:Thermal effects in tissue - burnsPhotochemical effects – change cellsAcoustic transients – physical shock to tissueChronic (long time) exposure
8 Ultraviolet (UV): risk to eyes UV – Keratitis, cornea turns white (6 -12 hours after exposure), retina damageRetinal damage caused by a class 3 laser reflected off a mirror. Permanent vision damage.(Source:
9 Infrared (IR): risk to eyes IR – flash burns to the cornea and rapid temperature rises in absorbing tissues.
10 Skin – UV and IR Erythema – burnt skin Accelerated ageing of the skin Increased risk of skin cancerAbnormal pigmentation
11 Non-beam hazards Electrical Chemical, including fume production MechanicalFireX-rays and electromagnetic interferenceGo to the webpage: A guide to Laser and Non-Beam Hazards (insert final link)
12 Laser Classes7 class of laser based on power output and divergence properties.In the UK the classes are Arabic numbers. USA and other countries use Roman numerals.Go to the webpage: A guide to Laser and Non-Beam Hazards (insert final link)
13 Laser warning labelsAperture hazard warning label for class 3R, 3B and 4Laser hazard warning label
14 Laser Safety Controls Depends on the class of laser used Departmental local rules (3B and 4)Risk assessmentLaser scheme of work (3R, 3B and 4)Laser inventoryAuthorised usersDepartmental registration of usersTraining
15 Emergencies and non-routine activities What are the local arrangements for equipment break down, planned maintenance of equipment, cleaning and set up/down of experiment.Emergencies – what are the local arrangemetns for 1st aid, fires and accidentsReporting incidents. Go to the HSAS incident website and complete a form.
16 Emergencies and non-routine activities What are the local arrangements for equipment break down, planned maintenance of equipment, cleaning and set up/down of experiment.Emergencies – what are the local arrangements for 1st aid, fires and accidentsDo you know how to report incidents? Go to the HSAS incident website and complete a form.
17 Laser Safety StandardOnline – go an find it and find out what you need to do.Standard covers how the University expects laser safety to be managed.Control of Artificial Optical Radiation at Work Regulations and Management of Health and Saftey at Work Regulations.
18 Assessment 18 questions multi-choice and true or false format 30 minutes16 or more right is a PASSGOOD LUCK.