640nm Longpass Filter for IPL Rejuvenation

640nm Longpass Filter for IPL Rejuvenation The 640 nm long pass optical beauty filter for IPL (LP640) effectively blocks wavelengths below 640 nm, selectively transmitting yellow, red, and near-infrared light deep into the dermis. This process promotes the reduction of fine lines, improves skin texture and pore appearance, and contributes to long-term skin health. Compared to LP615, LP640 enables deeper and more gradual heating of the dermal layers, making it especially suitable for skin remodeling applications. The LP640 filter allows only red and near-infrared wavelengths above 640 nm to pass through. When intense pulsed light (IPL) is applied to the skin, this filtered light is absorbed by water and collagen in the dermis, generating heat that stimulates collagen regeneration. Clinical observations have shown that after a period of 3 to 6 months, the skin becomes thicker and exhibits a reduction in wrinkles. Therefore, LP640 serves as a dedicated filter for "deep skin rejuvenation."…