design and development of the frequency-doubled q-switched nd: yag laser system for tattoos removal
DESCRIPTION
設計發展倍頻Q-開關銣:雅鉻雷射系統應用於除刺青TRANSCRIPT
Q-:DESIGN AND DEVELOPMENT OF THE FREQUENCY-DOUBLED Q-SWITCHED ND: YAG LASER SYSTEM FOR TATTOOS REMOVAL(DY-01-01-04-98) Chih-Yen Lin Shih-Yu Tzeng Yu-Wei Chiang 2 2 1 I-Ku Kuo Cheng- Hao Huang Kao-Chi Chung 1 Institute of Biomedical Engineering, National Cheng Kung University 2 Kera Harvest Inc. Q-:1,064 nm 520 ns 532 nm 1,064/532 nmQ: Q- : 1 2 handpiece 3 4 Q : Abstract 0.110m [2] Q-Q- 5100 ns selective photothermolysisQ- shock waves Q- [3]Q-:1,064 nm[4] 520 ns [5]532 nm 1,064/532 nmQ-: 1 1 1
Q-Switched Nd YAG laser 1,064 nmis used mainly in the treatment of tattoos. This laser with an impulse duration of 5 20 ns makes a deep penetration to reach the papillary dermis. It is well absorbed by dark and blueblack colours and dermal pigment. If the frequency is doubled, a wavelength of 532 nm in the green spectrum is used to remove light-coloured tattoos yellow and red and epidermal melanin. The purpose was to design and develop the the frequency-doubled 1,064/532 nm Q-switched Nd: YAG laser system for tattoos removal. The prototype design consists of a laser source, laser beam delivery and handpiece, laser control interface, security mechanism. Finally, the laser system is calibrated through energy meter and profile meter. Keywords: Q-Switched, Nd: YAG Laser, Tattoos 24 9 12[1]
1 fluenceJ/cm2 2 10 J/cm2 3 thermal relaxation time 4 A B CQ- 5100 nsD 1,064/532 nm
Handpiece 34567 mm
1 Q-: Max pulse energy at 1064 nm at 532 nm Pulse duration Max. repetition rate Beam diameter Beam divergence
Handpiece 3 4 A. B.
1,000 mJ 500 mJ 1014 ns 1/5 Hz 8 mm 0.5 mradQ
1,064nm 532nm Energy meterProfile meter a Handpiece 34567 mm 246810 J/cm2b Profile meter Energy meter c (d) e
45
2 Handpiece 360
1,064/532 nm
[1] Laumann AE, Derick AJ, (2006) J Am Acad Dermatol , 55: 413421. [2] Ferguson JE, Andrew SM, Jones CJ, August PJ (1997) Br J Dermatol , 137: 405410. [3] Sanjeev Aurangabadkar, Venkataram Mysore (2009) Indian J Dermatol Venereol Leprol, 75:111-26. [4] Brunner F, Hafner R, Giovanoli R et al. (1987) Hautarzt, 38: 61014. [5] Anderson RR, Margolis RJ, Watenabe S et al. (1989) J Invest Dermatol, 93: 2832.
Q 45
Handpiece
Handpiece
Q-: DY-01-01-04-98