515nm Longpass Filter for IPL Pigmentation The 515nm long pass optical beauty filter for IPL (LP515) is a specialized longpass optical filter designed for intense pulsed light (IPL) systems. It is engineered to address superficial skin conditions by utilizing a 515nm cutoff wavelength, which effectively blocks shorter wavelengths while allowing the transmission of green, yellow, red, and near-infrared (NIR) light. The spectral characteristics of this filter are precisely calibrated to target epidermal melanin, making it highly effective for treating surface-level pigmentation. Additionally, its transmission spectrum partially overlaps with the absorption peaks of hemoglobin (542nm and 577nm), enabling it to address mild vascular concerns. The LP515 filter is particularly recommended for the treatment of epidermal pigmentation disorders such as ephelides (freckles) and solar lentigines (age spots), as well as for improving overall skin tone uniformity and reducing mild erythema associat…