Page 14 - Chapter 3 - An Introduction to Laser/IPL Hair Removal

Chapter 3 – Fundamentals of Laser/IPL Hair Removal 1st Edition
Pain level – what is a good level? 147 Freezers and ice packs 147 Skin cooling 147 Contraindications 148 Timings 148 Post-treatment 148 Placement 149 Why do we get poor results? 150
Section 3.6 – Technology – Lasers & IPLs 153
The Technology – Lasers and IPLs 154
Diode Lasers 154
Triple wavelength diode lasers... 155 Diode laser power – why does it matter? 156
Triple Wavelength Diode Laser – what actually came out of it... 157
How do the hair removal lasers compare – a short review? 159
Diode Lasers – ‘SHR/in-motion’ vs ‘Stamping’ Techniques 160 Intense Pulsed Light Systems - What is an IPL? 162 Filtering the Flashlamp Output 166
How much energy is in each waveband? 167
IPL ‘Pulse Trains’ 168
Difference between IPL and Diode Laser hair removal 169
Comparison between Lasers and IPL Systems 170 Risk of unwanted damage in LHR 172
How do hair removal systems compare? 173
Wavelength 173 Pulsewidths 174 Fluences 174 Absorption 176 Skin colours 176 Cooling 177 Power Densities 178
Comparison between lasers and IPLs – Results from clinical studies 180
Unwanted Side Effects 181 Laser vs IPL – Some Myths... 181 IPL Light Energy – How Much Actually Reaches the Skin? 185 Advantages and Benefits of IPLs over Lasers 187
Manufacturers’ “Pre-sets” – Why are they usually useless? 188
What is actually coming out of these devices? 189
Conclusions 189
Section 3.7 – Glossary 190 APPENDICES 198 Appendix 1 - Summary of Light-Tissue Interactions 198 Appendix 2 – Thermal Diffusivity 200 Appendix 3 - Animations and Videos: 202 Appendix 4 - Calculating the Fluence (Energy Density) 204
________________________________________________________________________ 14 Chapter 3 Laser/IPL Hair Removal
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