Page 124 - Chapter 3 - Fundamentals of Laser/IPL Hair Removal

Visible Radiation (light)
Watt Watt/cm2 Wavelength
YAG (Yttrium Aluminium Garnet)
Electromagnetic radiation which can be detected by the human eye. It is commonly used to describe wavelengths which lie in the range between 400 nm and 700-780 nm. The peak of the human spectral response is about 555 nm.
A unit of power (equivalent to one Joule per second) used to express laser power. It is names after the famous Scottish scientist James Watt.
A unit of intensity or irradiance used in measuring the amount of power per area of absorbing surface, or per area of CW laser beam. See more here...
The wavelength of light determines the colour we see with the eye. Visible light has wavelengths in the range 400 to 700 nanometres, with red light at the top end of this range. Infra-red light is invisible but we feel it as heat. Ultra-violet light is also invisible and caused melanocytes to produce excess melanin – a process known as “tanning”. See more here...
A widely used solid-state crystal which is composed of yttrium and aluminium oxides which is doped with a small amount of rare-earth elements such as neodymium, erbium and holmium.
Chapter 3 – Fundamentals of Laser/IPL Hair Removal 1st Edition
________________________________________________________________________ 124 Chapter 3 Laser/IPL Hair Removal
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