Laser Hair Removal Devices

Laser Hair Removal Devices



Laser Hair Removal Devices
There are several different types of​ laser hair removal devices available today .​
These are alexandrite lasers,​ diode lasers,​ ruby lasers,​ and NeoDymium Yttrium Aluminum Garnets,​ which is​ commonly referred to​ as​ Nd:YAGs.
Alexandrite lasers became available for​ use in​ laser hair removal in​ 1997 when they were cleared by the​ FDA .​
Alexandrite lasers produce light beams in​ the​ red spectrum of​ visible light .​
Their wavelength is​ 755 nanometers which is​ very effective but only safe on​ light skin .​
Generally,​ alexandrite lasers are considered long pulsed and because of​ this produce greater depth penetration .​
Five different types of​ the​ alexandrite laser are available .​
These include the​ Apogee,​ GentleLase,​ Epicare,​ Epitouch Alex,​ and Ultrawave II-III.
The FDA also cleared diode lasers for​ use in​ 1997 as​ an​ effective method of​ permanent hair reduction .​
Diode lasers produce a​ wavelength of​ 800 nanometers with pulse widths of​ 5-400 milliseconds .​
This type of​ laser has proved successful in​ the​ treatment of​ ingrown eyelashes and works very well on​ dark hair .​
The Light SheerXC is​ a​ diode laser that is​ extremely powerful .​
Other diode lasers include EpiStar,​ Apex-800,​ Iridex,​ and Mediostar.
Ruby lasers were also cleared by the​ FDA for​ laser hair removal in​ 1997,​ however,​ they did not prove as​ effective .​
Clinical research showed that the​ laser damage did not extend far enough down into the​ hair shafts to​ result in​ permanent laser hair removal .​
Originally there were five types of​ ruby lasers,​ of​ which only two are still available for​ commercial use .​
a​ Ruby lasers operate on​ a​ shorter wavelength system of​ only 694 nanometers .​
NeoDymium Yttrium Aluminum Garnets have a​ longer wavelength which makes them more effective for​ longer term,​ and according to​ some people,​ even permanent laser hair removal .​
There are two types of​ Nd:YAGs lasers .​
These are the​ Q switched and the​ long pulse .​
All Nd:YAGs produce a​ wavelength of​ 1064 nanometers .​
The Q,​ switched NeoDymium Yttrium Aluminum Garnets has a​ very short pulse of​ about one nanosecond .​
Long pulse NeoDymium Yttrium Aluminum Garnets have a​ pulse of​ about a​ millisecond and can be used on​ all skin types.
The pulse duration,​ or​ pulse width,​ of​ lasers used for​ hair removal is​ the​ timing of​ the​ light energy .​
It is​ usually measured in​ milliseconds .​
Most lasers used for​ hair removal have a​ maximum pulse duration in​ the​ 20 to​ 40 millisecond range .​
Longer pulse widths are generally considered more effective and produce fewer side effects.
Each type of​ laser produces a​ specific spot size which is​ measured in​ millimeters .​
the​ spot size is​ the​ size,​ or​ width,​ of​ the​ beam of​ light at​ the​ laser sends out .​
a​ spot size of​ seven to​ 10 mm is​ considered acceptable for​ laser hair removal.
Most lasers have three main parts,​ an​ energy source,​ and active medium,​ and an​ optical cavity,​ also known as​ a​ resonator .​
The energy source is​ a​ device that supplies energy to​ the​ active medium .​
Laser hair removal devices use electricity as​ their energy source .​
The element of​ the​ active medium contains atoms that can both absorb and store the​ energy .​
the​ optical cavity is​ the​ part of​ the​ laser that contains the​ active medium .​
Lasers are defined by the​ elements they use .​




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