Hc vin thc hin: Cao Th L Thanh V Hng Nguyn Huy Cng

Ni dung

I.Gii thiu chung1.Cu trc in hnh ca Laser 2.Nguyn l to tia Laser

1.Cu trc in hnh ca Laser+Ngun nui: cung cp nng lng cho h thng laser, c th l s dng 1 tia laser kch thch. +Bung cng hng: cha hot cht l dung dch mu, cu trc ca n quyt nh bc sng hot ng ca laser. +Gng phn x: khuych i tn hiu nh sng

Ngun nui+Dye laser lm bng cht hu c c: -Nng lng vng cm ln -t dn in =>Dng ngun bm l tia laser khc +Theo nh lut Stockes: nh sng pht ra c bc sng di hn bc sng nh sng m nguyn t hp th =>Dng laser c bc sng ngn lm ngun nui cho cht mu cho ra nh sng mu khc. VD: cht mu Rhodamine 6G Chloride trong dung mi Methanol pht ra nh sng mu vng khi c kch thch bi tia laser mu xanh l cy.

Hot cht ca laser lng+ L dung dch mu, gm: - Dung mi: nc, ru(methanol, etanol, glycerol) -Cht hu c: cu to chui a phn t, gm cc gc lin kt ni tip tun t nhau, nh (CH =)n.

+ Dye laser thng thuc 1 trong cc loi sau: -Cht mu Polymethine: to laser hoc hng ngoi gn (bc sng 0,7-1,5 micromet). VD:3,3' diethyl thiatricarbocyanine iodide, c th pht bc x HN c bc sng 0,81 micromet. - Cht mu Xanthene: to laser vng nh sng nhn thy. VD: rhodamine 6G,c th pht nh sng c bc sng 0,59 micromet. - Cht mu Coumarin: to laser vng mu xanh lc v lam (bc sng 0,4 -0,5 micromet) VD: coumarin 2,c th pht ra tia laser mu xanh lam c bc sng 0,45micromet.

2.Nguyn l to tia laser Da hin tng pht x cng bc to ra laser. Khi 1 photon ti va chm vo hot cht th ko theo l 1

photon khc bt ra bay theo cng hng vi photon ti. mt khc bung cng hng c 2 gng chn 2 u, 1 mt phn x ton phn cc photon khi bay ti, mt kia cho mt phn photon qua mt phn phn x li lm cho cc ht photon va chm lin tc vo hot cht laser nhiu ln to mt photon ln. V th cng chm laser c khuch i ln nhiu ln.

Cu trc in hnh v tin trnh hnh thnh tia LaserGng phn x 100%E2

Bung cng hng vi hot cht Laser

Gng phn x 70- 90%

E1

Ngun nui.E2

E1

E2 E1

Chm tia Laser.

II.c im Laser lng-Hot ng ch lin tc hoc ch xung +Ch lin tc:cng sut laser tng i khng i so vi thi gian. S o nghch mt (electron) cn thit cho hot ng laser c duy tr lin tc bi ngun bm nng lng u n. +Ch xung:cng sut laser lun thay i so vi thi gian, vi c trng l cc giai on ng v ngt cho php tp trung nng lng cao nht c th trong mt thi gian ngn nht c th. -ng dng trong y hc: +iu tr 1 s tn thng hoc khi u +iu tr trong nhn khoa +iu tr cc ri lon mch mu +Loi b vt so li (c bit so sau phu thut), hnh xm, vt nm

-u im: d dng to tia laser c bc sng (c mu) khc nhau, bng cch thay i cu trc dung dch mu( cht mu v nng dung dch, m ko thay i thnh phn cu to) => Ph pht x laser lng rt rng.

-Nhc im: gi thnh cao

H thng laser mu

Gii thiu my Demobem 2000

M t my Dermobeam 2000My DYE Laser dng iu tr cc thng tn v mch v da liu. +Dermobeam 2000 : -laser DYE dng xung (PDL), -iu tr bnh da liu nh: vt chm (PWS), ni mch mu di da vng mt c, vng khyu chn. ty nt rui, mn cc, mn cm, cc d tt trn da, -di rng cho la chn tn s v s ln xung. - vic la chn di xung ln hn so vi di thng thng l 450 s => kt qu iu tr l tng -s dng km vi h thng xt lm mt (Smartspray) gn trc tip vi u t => lm mt phn da iu tr laser xung trc v sau khi chiu. ng dng: -Da liu -Thm m -iu tr cc thng tn v mch -iu tr cc vt chm -Lm trng rng

Cc thng s k thut ca my Loi Laser:Pulsed DYE Bc sng:595 nm Mc nng lng ti m:Ln n 3 J Tn s:xung n - 0.5 Hz ti a di xung:T 0.5 - 40 ms Tiu im:5 mm - 7 mm iu khin in t:Vi x l Bng iu khin:LCD Chm tia dn ng:HeNe laser 1 mW (632.8 nm) Kch thc my:92 cm(H), 40 cm(W), 80 cm(D) Trng lng:90 kg

Ph kinPh kin theo my: 01 H thng xt lm lnh da (Smartspray) 01 Tay cm iu tr vi tiu im 05 mm v 07 mm 01 B cp quang 1.000 micron 01 Cng tc p chn 01 Tm ph my 02 Knh bo v mt cho Bc s v k thut vin 01 B cha kho 01 Va-li nhm ng ph kin my

H thng Laser mu