IPL AND LASER TECHNOLOGY
HOW IT WORKS
This is a term used to describe the entire range of light radiation, from gamma rays to radio waves. When we can see light radiation it encompasses an array of colours that make up optical or visible light.This is measured in wavelengths, also known as nanometres (nm). Electromagnetic waves can not only be described by their wavelength, but also by their energy and frequency. The electromagnetic spectrum includes, from longest wavelength to shortest: 1. Radio waves 2. Microwaves 3. Infrared 4. Optical 5. Ultraviolet 6. X-rays 7. Gamma-rays. Visible light waves are the only electromagnetic waves we can see. We see these as the colours of the rainbow. Each individual colour has a different wavelength, measured in (nm). Red has the longest wavelength (low associated energy) Violet the shortest (high associated energy). When all the waves are seen together, they make white light.
The Electromagnetic Spectrum
For IPL VISIBLE LIGHT is used & Nd:YAG uses NEAR INFRARED
Different wavelengths are associated with different colours For example; separate filter cuts Each colour has different depths of penetration with an optimal target structure For example; Blue light = Acne as most superficial
A laser creates light by energy being put into material. This can be electricity or another light source. This energy makes the material go into an ‘excited state’. Every material is made up of atoms which hold electrons. This newly ‘excited state’ means electrons in the material have extra energy, and will eventually lose that energy. When they lose the energy they will release a PHOTON (a particle of light). The type of optical gain medium used will set what colour (wavelength, nm) will be produced. The release of photons is the "Emission of Radiation" part of laser.
Light Amplification by Stimulated Emission of Radiation
This is the principle upon which light based treatments work: the Selective Heating through the Absorption of Light. Allows us to target specific structures (selective). The treatment needs to reach a temperature of 70OC to ensure permanent denaturing of proteins, e.g. destroying the hairs capability of regrowth if hair is the target structure. We also refer to our target structure as These are tiny substructures that are able to absorb light. They are spectrally selective, meaning they have a preference to absorb different wavelengths of light. For treatment to be successful there must be a chromophore to treat. Having an optimal target structure helps minimises possible side effects.
PHOTO – THERMO-LYSIS (Light – Heat – Destroy)
There are three main chromophores: Melanin, Blood & Water