Knight Optical’s ranges of custom light guides are available in a variety of materials. They currently offer BK7 or equivalent, Sapphire or equivalent and UV Fused Silica light guides, in an assortment of diameters and thicknesses.
Light guides serve as the key element in cosmetic laser, or intense pulsed light (IPL) applications. IPL is commonly used for the removal of unwanted hair, as well as a range of other cosmetic applications. IPL applications make use of a variety of wavebands to target different chromophores. For this reason, Knight Optical’s custom light guides are available in a choice of materials to suit your waveband requirement.
Knight Optical’s custom BK7 or equivalent light guides offer high internal reflection to minimize the loss of transmitted light. BK7 or equivalent can offer more than 90% transmission between 330 and 2000 nm, which makes this material suitable for IPL applications used to treat pigmentation, as the peak absorption of the human pigment melanin is 335 nm. BK7 or equivalent is also recommended for its high homogeneity and low bubble and inclusion content.
Knight Optical’s custom UV fused silica light guides also provide more than 90% transmission at 335 nm and work efficiently down to 185 nm, making them an excellent alternative to BK7 or equivalent for pigmentation treatment. In addition, Knight Optical’s custom fused silica light guides offer high thermal conductivity and an increased laser damage threshold, both of which are essential for cosmetic laser applications.
Knight Optical also provides custom sapphire light guides, a common alternative to BK7 and fused silica. Sapphire is an extremely hard material, which offers increased durability and resistance to damage. Sapphire also provides excellent transmission over the entire visible and SWIR range.
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