M\u1ed9t tia laser \u0111\u1ec3 t\u1ea9y l\u00f4ng c\u00f3 b\u01b0\u1edbc s\u00f3ng duy nh\u1ea5t th\u00e2m nh\u1eadp s\u00e2u v\u00e0o da. Laser t\u1ea9y l\u00f4ng v\u1edbi c\u00e1c b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 b\u1edfi melanin.<\/figcaption><\/figure><\/div>\n\n\n\nNg\u01b0\u1eddi ta \u0111o b\u01b0\u1edbc s\u00f3ng t\u00ednh b\u1eb1ng nanomet (nm). B\u00e2y gi\u1edd, c\u00e1c ch\u1ea5t kh\u00e1c nhau trong c\u01a1 th\u1ec3 ch\u00fang ta h\u1ea5p th\u1ee5 c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng c\u1ee5 th\u1ec3. Ng\u01b0\u1eddi ta g\u1ecdi nh\u1eefng ch\u1ea5t n\u00e0y l\u00e0 chromophores. Chromophores l\u00e0 s\u1eafc t\u1ed1 \u0111en trong t\u00f3c, l\u00f4ng (melanin), oxyhaemoglobin trong m\u00e1u v\u00e0 n\u01b0\u1edbc.<\/strong><\/p>\n\n\n\n\u0110\u1ec3 t\u1ea9y l\u00f4ng b\u1eb1ng laser, th\u01b0\u1eddng h\u1ecd s\u1ebd quan t\u00e2m \u0111\u1ebfn melanin trong t\u00f3c. Melanin h\u1ea5p th\u1ee5 c\u00e1c b\u01b0\u1edbc s\u00f3ng trong kho\u1ea3ng 600-1100 nm. V\u00ec v\u1eady, c\u00f3 nhi\u1ec1u lo\u1ea1i laser chuy\u00ean nghi\u1ec7p c\u00f3 kh\u1ea3 n\u0103ng t\u1ea9y l\u00f4ng. <\/p>\n\n\n\n
C\u00e1c t\u1ebf b\u00e0o c\u00f3 melanin trong nang l\u00f4ng c\u1ee7a b\u1ea1n h\u1ea5p th\u1ee5 c\u00e1c xung \u0111i\u1ec7n laser. \u0110i\u1ec1u n\u00e0y chuy\u1ec3n th\u00e0nh nhi\u1ec7t l\u00e0m t\u1ed5n th\u01b0\u01a1ng nang l\u00f4ng. L\u00f4ng sau \u0111\u00f3 ng\u1eebng ph\u00e1t tri\u1ec3n v\u00e0 b\u01b0\u1edbc v\u00e0o giai \u0111o\u1ea1n ngh\u1ec9 ng\u01a1i. V\u00ec v\u1eady, ch\u00fang ta s\u1ebd th\u1ea5y s\u1ef1 t\u0103ng tr\u01b0\u1edfng ch\u1eadm h\u01a1n v\u00e0 cu\u1ed1i c\u00f9ng, nhi\u1ec1u s\u1ee3i l\u00f4ng m\u1ecdc \u00edt h\u01a1n.<\/p>\n\n\n\n
- C\u00f2n IPL \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng ho\u1eb7c m\u00e0u s\u1eafc kh\u00e1c nhau v\u00e0 kh\u00f4ng th\u1ec3 t\u1eadp trung nh\u01b0 m\u1ed9t tia laser. C\u00e1c b\u01b0\u1edbc s\u00f3ng cho IPL l\u00e0 500 \u0111\u1ebfn 1200 nanomet.<\/strong><\/li><\/ul>\n\n\n\n