UVC LIGHT SOURCES P.K. Swain Heraeus Noblelight America Outline Hg based lamps Arc lamps • Low pressure lamp • Medium pressure lamp Electrode-less lamp Excimer lamp UVLED Lasers and Upconverting Phosphor P.K. Swain| Heraeus Noblelight America MERCURY-DISCHARGE TYPES Hg-low Amalgam- Medium pressure Lamps pressure Ps ~ 0.5 W/cm Ps ~ 4 W/cm Ps ~ 100 - 300 W/cm T~40°C ~30mW/cm² T~120°C ~200mW/cm² T~950°C 4-12W/cm² 1.00 1.00 254 nm, 0.75 . η=35% 0.75 a.u , 0.50 0.50 185 nm, η=10% Intensity Intensity, a.u. Intensity, 0.25 0.25 Varius Gesichtsbräunereinheit0.00 0.00 150 175 200 225 250 275 300 200 300 400 500 600 700 800 λ , nm λ, nm P.K. Swain| Heraeus Noblelight America LOW PRESSURE ARC LAMP / AMALGAM LAMP Integration Time: 3ms Distance: 70 cm 4000 3500 3000 2500 2000 Arb. Units Arb. 1500 1000 500 0 200 250 300 350 400 450 Wavelength (nm) P.K. Swain| Heraeus Noblelight America MEDIUM PRESSURE HG-LAMP P.K. Swain| Heraeus Noblelight America ELECTRODE-LESS MICROWAVE LAMP SYSTEM P.K. Swain| Heraeus Noblelight America ELECTRODE-LESS MICROWAVE LAMP BULB SPECTRA P.K. Swain| Heraeus Noblelight America BARRIER DISCHARGE LAMP (EXCIMER LAMPS) P.K. Swain| Heraeus Noblelight America SPECTRA OF DIFFERENT EXCIMER LAMPS P.K. Swain| Heraeus Noblelight America COMPARISON OF LED VS. HG BASED LAMPS Hg based lamps LED Contains Hg No Hg Delayed ignition Instant ignition Plasma discharge Solid state High energy Low energy consumption consumption IR radiation No IR radiation Broad band emission Monochromatic emission P.K. Swain| Heraeus Noblelight America DP-UVC (DIODE PUMP) LASERS P.K. Swain| Heraeus Noblelight America SUMMARY Lamp Arc Lamps Microwave Excimer UVC LEDs UVC Lasers Technology Lamps Lamps Technology High High Medium Low Low Maturity Cost High High Medium Low Low effectiveness Reliability Medium High Medium Low Low Energy Low Low Low Medium Medium Efficiency Environmental Low Low High High High Friendliness P.K. Swain| Heraeus Noblelight America THANK YOU FOR YOUR ATTENTION ! P.K. Swain| Heraeus Noblelight America.