Narrow Spectrum Light (DPL) refers to a new type of optical skin rejuvenation technology with a spectral range of 500~600nm or 550~650nm. Different from the traditional photon skin rejuvenation technology (IPL, Intense Pulse Light), the narrow-spectrum light technology can excite a selected narrow-spectrum pulse light in the 100nm band. This band also includes the absorption peaks of melanin, oxygen and hemoglobin. The effective therapeutic energy can be precisely concentrated, and the problems of facial pigmentation and telangiectasia (red face syndrome) can be solved quickly and efficiently. DPL narrow-spectrum light skin rejuvenation is known as an epoch-making optical cosmetic skin rejuvenation technology because of its curative effect significantly surpassing photon skin rejuvenation, and the treatment cycle is significantly shortened. Scope of application of DPL machine 1.Remove or dilute facial pigment spots 2. Remove or improve facial redness (Red blood streaks on the skin are caused by skin thinning, discoloration, exposure of capillaries and veins, etc. Photons of specific wavelengths of photons can make the tiny blood vessels on the surface of the skin absorb energy to the maximum within a certain period of time, resulting in tiny blood vessels. Blood vessels coagulate or subside without damaging the skin, while stimulating the growth of collagen in the dermis of the skin, increasing the thickness and density of the epidermis, so that small blood vessels are no longer exposed, and the elasticity and resistance of the skin are significantly increased) 3. Treat facial acne and fade acne marks (The photothermal effect will promote the opening of the pores, allowing more oxygen to enter the pores, restricting or killing the Proteobacterium acnes, and has no effect on the surrounding normal skin tissue, helping the inflammatory acne to subside, and there is a brightening effect when the pores shrink. The role of the skin to eliminate or lighten the marks or scars left by acne) 4. Improve rough skin and dilute fine wrinkles The principle of DPL hair removal: After the melanin in the hair shaft selectively absorbs light energy, the light energy is converted into heat energy, and the heat is transmitted through the hair shaft to the isthmus of the hair follicle and the prominence of the hair follicle (hair papilla, hair growth point) to destroy the hair papilla. The blood vessels are heated and shrink, so as to achieve the effect of hair removal.