NALI Section 2 Word Scramble
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| Term | Definition |
| eye damage can be effected from? | the laser wavelengths |
| wavelength | DISTANCE from one wave top to the next. |
| frequency | # of waves passed PER TIME INTERVAL |
| what does LASER stand for? | light amplification by stimulated emission of radiaion |
| monochromatic | all light produced by the laser is of ONE WAVELENGTH OR COLOR |
| coherence | all waves are IN PHASE with each other |
| nanometer | nm is one billionth of a meter |
| what is light? | the color or light determined by FREQUENCY or WAVELENGTH |
| what are the 4 components of a laser? | the LASER MEDIUM, SOLID, LIQUID, AND GAS |
| Optical cavity/ resonator | surrounds LASER MEDIUM and contains the AMPLIFICATION PROCESS |
| Power supply | 'pump' that EXCITES ATOMS and creates POPULATION INVERSION |
| Delivery system | a ARTICULATING ARM w/ mirrored joints to DELIVER light to TARGET |
| how do lasers work? | produces PURE HIGH ENERGY, DIRECTED LIGHT |
| whats the anatomy of a laser? | mirrors align with photons; traveling PARALLEL allows TRANSMISSION of laser light |
| what are the 3 special properties of laser light? | monochromatic collimated coherence |
| what does STAR stand for? | SCATTERED, TRANSMISSION, ABSORPTION, REFLECTION |
| selective photothermolysis? | target chromophore ABSORBS light energy and CONVERTS the LIGHT into HEAT. |
| thermal relaxation time (TRT) | time for target chromophore to dissipate 63% incident thermal energy |
| thermal damage time (TDT) | time for entire target including primary chromophore ex. melanin |
| what is fluence and what is it measured by? | amount of ENERGY delivered. measured in Joules/cm2 |
| pulse duration | measured as TIME INTERVALS between PULSES EX. microsecond, nanosecond, picosecond |
| pulse duration is determined by? | TARGET SIZE; smaller targets need SHORTER pulse durations |
| optical density | degree to which PROTECTIVE EYEWEAR to use. |
| joule is the measurement of? | ENERGY |
| collimation | different wavelengths travel all directions "not parallel" |
| how does light interact with tissue? | wavelength |
| light of a specific wavelength is selectively absorbed by? | target chromophore |
| exposure (pulse width) | less than THERMAL RELAXATION TIME of the chromophore |
| sufficient fluence (energy) | reaches the chromophore to DESIRED EFFECT |
| chromophores | target of LASERS ex. water |
| what 4 components of skin that absorb light? | MELANIN,HEMOGLOBIN, INTRACELLULAR WATER, TATTOO INK |
Created by:
alliefoster
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