Archive for the ‘ The Science of Laser ’ Category

Laser v IPL

Friday, May 15th, 2009

Should I Chose IPL or Laser for treatment?

IPL is an acronym for Intense Pulsed Light and describes the method through which light therapy or treatment is delivered. To dispel a common belief, IPL is not a brand and is certainly not a type of laser as many are led to believe.

Regardless of type or brand all light based treatment devices rely on a very similar methodology. That is a theory known as selective photothermolysis which describes the process of selectively heating a target whilst causing minimal thermal damage to surrounding tissue.

Key difference between Laser and IPL

Lasers use a fixed wavelength of light to ensure the target is treated effectively whilst greatly minimising risk of heating/damaging other chromophores/tissue.

IPLs use filters to reduce the bandwidth of light emitted however a much broader spectrum of light is still absorbed during treatment. Many clinics chose IPL over laser as it is a substantially cheaper technology and a single device can often treat a myriad of conditions.

The simple answer is Laser is a much safer technology with research also suggesting more effective and thus cost effective method of achieving lasting cosmetic results.

Cosmetic/therapeutic Laser Theory

Sunday, January 25th, 2009

Ever wondered how the laser devices perform the miracle treatments they do. Please read the brief extract below.

Laser light (energy) has unique properties that allow it to be used therapeutically. Laser light is monochromatic (single wavelength), coherent (in phase, both in time and space), and collimated (light waves are parallel). These properties make possible the generation and delivery of high fluence (energy per area), which can interact with the skin. Additionally, the monochromaticity of laser light is essential for selective targeting of structures in the skin (chromophores), which preferentially absorb light of that wavelength. Commonly targeted chromophores in the skin, which each have their own unique absorption spectrum for laser light, include water, hemoglobin, melanin, and tattoo ink.

When laser light hits the skin, it may be reflected, transmitted, or absorbed. Absorbed energy is most responsible for the clinical effect because it is converted to thermal energy by absorption of heat by the intended targets (chromophores).

Copyright Laser Clinics Australia 2008.