What is wavelength penetration depth?
Wavelength penetration depth refers to how deeply different light wavelengths can travel into biological tissues.
In hair restoration therapy, red light at around 650 nm wavelength penetrates the epidermis and dermis layers effectively, reaching hair follicle structures without damaging deeper tissues.
Optimizing wavelength penetration depth ensures that therapeutic light energy reaches the intended targets — the scalp and follicular mitochondria — maximizing red light therapy effectiveness for hair growth stimulation.
Related terms
Photoreceptors
Light & Technology
Photoreceptors are specialized molecules or proteins that detect and respond to light energy.
Laser Diode
Light & Technology
A laser diode is a semiconductor device that emits light at a specific wavelength.
LED Therapy
Light & Technology
LED therapy uses light-emitting diodes to deliver low-energy light to the skin or scalp.
Intense Pulsed Light (IPL)
Light & Technology
Intense Pulsed Light (IPL) is a broad-spectrum light therapy that emits multiple wavelengths.
