Page 218 - Chapter 3 - Laser/IPL Hair Removal

Chapter 3 – Fundamentals of Laser/IPL Hair Removal 2nd Edition
The results from the two studies above suggest that the SHR/in-motion technique is perfectly valid and may be useful but that it must be applied correctly otherwise unwanted damage will occur.
Intense Pulsed Light Systems - What is an IPL?
Intense Pulse Light Systems (IPLs) are much more flexible compared with lasers. They do not generate coherent light like lasers – instead their light is much more similar to camera flashguns. They produce a high intensity flash of light of many wavelengths. Some systems produce a range of pulse durations.
IPL systems work in exactly the same way as lasers but can be much ‘gentler’ on skin. Their powers are considerably lower and hence they induce much less in the way of damagetosurroundingtissues,ifappliedcorrectly. In addition, they are much safer to operate since there is little risk of damage to the eye, unlike lasers. (What are the differences between lasers and IPLs? Watch this video.)
All IPL systems produce filtered light. This is easy since all it requires is a filter to block parts of the spectrum. The remainder of the light can then progress through the filter to the skin. However, in some systems too much of the red is allowed through which can lead to thermal damage in the tissue.
Figure 116 – Spectral output of a Xenon lamp - unfiltered
________________________________________________________________________ 218 Chapter 3, Ed. 2.0 Laser/IPL Hair Removal
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