Page 126 - Chapter 3 - Fundamentals of Laser/IPL Hair Removal
P. 126
Chapter 3 – Fundamentals of Laser/IPL Hair Removal 1st Edition
Chromophores
Target chromophores will absorb some of the incoming light energy and may heat up as a consequence.
Reactions
The main tissue reactions are:
photo-chemical, photo-thermal, photo-ablation, photo-mechanical.
Absorption
When a photon of light interacts with an electron around an atom, the photon’s energy can be ‘taken’ by the electron causing it to be ‘excited’ – this process is absorption.
Scattering
If an electron has absorbed a photon’s energy, then it will, after a short time, fall back into its original orbit around the nucleus. As it does it releases the energy it took from the photon. If the conditions are right, that energy will emerge as a new photon, in a different direction to the original one – this is a scattered photon.
________________________________________________________________________ 126 Chapter 3 Laser/IPL Hair Removal
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