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Laser Safety

Laser Safety. Andras Kis Zettl group safety talk 11/16/2006. Laser Components. L ight A mplification by S timulated E mission of R adiation. Associated hazards: Laser Beam: eye injury, burns, skin cancer (UV), fire hazard

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Laser Safety

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  1. Laser Safety Andras Kis Zettl group safety talk 11/16/2006

  2. Laser Components • Light Amplification by Stimulated Emission of Radiation • Associated hazards: • Laser Beam: eye injury, burns, skin cancer (UV), fire hazard • Active medium: toxic chemicals or gases (organic dyes, BeO in Ar lasers, HF, HeCd, HeHg, HeSe) • Excitation source: high voltage, water cooling

  3. Human Eye - laser beam can be focused by cornea and the lens to a very tight spot on the retina 400-1400 nm <400, >1400 nm Retinal damage <400, >1400 nm Burns, cataracts

  4. Eye Injury

  5. Eye Injury From A Pulsed Laser

  6. Skin Burns • CO2 laser reflected from a metal surface

  7. Types of laser eye exposure

  8. Laser hazard classes • Classification by wavelength and output power, according to their ability to produce damage

  9. Labels on setups Class II Class IIIa with expanded beam Class IIIa with small beam Class IIIb Class IV

  10. Safety measures • Be informed • Eyewear for classes IIIb, IV for everybody in the room • Beam paths above >200 mW should be guided through tubes • Highest risk during alignment, optical setup modification

  11. IIIb and IV requirements • EHS 280 Laser Safety Training • EHS 281 Laser Safety Retraining (every 3 years) • On the Job Training – provided by PI/supervisor & documented in the Activity Hazard Document • Laser eye exams Links: UCB laser safety LBL laser safety

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