Laser hair removal has transformed the beauty sector by providing a lasting answer to hair removal woes. But behind its effectiveness lies a fascinating story of science and technology.
As the laser beam penetrates the skin during a treatment session, it encounters various obstacles, including light scattering. This phenomenon causes the beam to spread outward, reducing its effectiveness. To counter this, experts in the field have developed innovative techniques, including using larger laser spots.
A recent investigation explored how beam scattering affects laser hair removal, specifically examining two commonly used lasers: Nd:YAG (1064 nm) and Alexandrite (755 nm). Researchers measured skin surface temperatures following laser irradiation, observing how they varied with different laser spot sizes and skin types.
What they found was intriguing. Despite using the same incoming laser beam fluence, the skin’s surface temperature increased with the laser spot size. This correlation aligned with a model that accounted for the spreading of the laser beam due to scattering, indicating a consistent spread of about 1.8 mm in diameter.
Understanding these scientific principles is crucial for optimising laser hair removal treatments for individuals with varying skin types and hair densities. By fine-tuning parameters such as laser spot size, practitioners can achieve more precise and effective results.
The journey of laser hair removal is not merely about aesthetics; it’s a testament to the ingenuity of scientific research and technological innovation. With advancements continuing to push the boundaries of what’s possible, the future of laser hair removal holds even more promise for individuals seeking a permanent solution to unwanted hair.
