What factors affect the intensity of infrared light treatment?

The intensity of infrared light treatment is significantly influenced by the distance from the light source and the angle of incidence. The principle behind this is that the intensity of light diminishes as the distance from the source increases; this is often described by the inverse square law. In practical terms, the closer the light source is to the treatment area, the more intense the treatment will be. Furthermore, the angle at which the light hits the skin also plays a crucial role. When light is directed perpendicularly to the surface, it penetrates more effectively than when it approaches at an angle. This is because a light beam striking at an angle spreads its energy over a larger area, leading to a lower intensity at any given point.

While other factors like treatment duration, patient positioning, skin type, environmental conditions, age, and weight can influence overall treatment outcomes or comfort, they do not directly affect the technological aspects of how light intensity is measured or delivered. Therefore, focusing on the distance and angle of incidence offers a clear understanding of how to optimize the effects of infrared therapy.