Principles-Laser Flashcards
What does Laser stand for
Light Amplification by Stimulated Emission of Radiation
Maxwell is credited for the concept that light is
EM wave
Plank is credited for
Photoelectric effect (PE)
Einstein is credited for
Quantum mechanics
Attenuation means
decrease in beam energy
Diffraction means
bending of wave
Extinction length means
How far wave goes
Interference means
optical effect which can occur when two or more light beams are superimposed
What are the three characteristics of a laser that distinguishes it from ordinary light
Monochromatic-one color
Coherent-crests, troughs lined up
Directed beams are collimated-narrow and concentrated
How does the light of a laser behave once emitted
STAR Scattered Transmitted Absorbed Reflected
What is a chromophore
An atom or group whose presence is responsible for the color of a compound.
What are the main three tissue chromophores found in the body
Hemoglobin
Melanin
Water
Which types of light are absorbed by hemoglobin, melanin, and water
water absorbs infrared light
hemoglobin absorbs visible light
melanin absorbs UV light
What are the four benefits of using a laser vs a scalpel
greater precision
rapid healing
preserves surrounding tissue
minimizes bleeding/edema
What are the classification assignments of lasers
class1 class 2 class 2a class 3a class 3b class 4
class 1 lasers are
not hazardous
used for laser printers
class 2 lasers are
conventional light sources
class 2a lasers are
not intended for viewing
used for bar code scanners
class 3a lasers are
possibly hazardous
used in laser light shows, laser pointers
class 3b lasers are
hazardous if viewed directly
used for spectrometry and light shows
class 4 lasers are
hazardous to eyes and skin
most surgical lasers
What are the two main regulation bodies for lasers
American National Standards Institution (ANSI)
Center for devices and Radiological health (CDRH)
What are four hazards associated with laser use on humans
atmospheric contamination via blum
perforation of vessels or structures
embolism
inappropriate energy transfers-burns
What color lense should be worn when using C02
Clear, plastic
