WO2015174555A1 - Discharge starting voltage and holding current supply unit, and skin treatment multi-wavelength laser device including same - Google Patents

Discharge starting voltage and holding current supply unit, and skin treatment multi-wavelength laser device including same Download PDF

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Publication number
WO2015174555A1
WO2015174555A1 PCT/KR2014/004249 KR2014004249W WO2015174555A1 WO 2015174555 A1 WO2015174555 A1 WO 2015174555A1 KR 2014004249 W KR2014004249 W KR 2014004249W WO 2015174555 A1 WO2015174555 A1 WO 2015174555A1
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voltage
unit
discharge starting
holding current
alexandrite
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PCT/KR2014/004249
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French (fr)
Korean (ko)
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이선우
김정수
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비손메디칼 주식회사
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Priority to PCT/KR2014/004249 priority Critical patent/WO2015174555A1/en
Publication of WO2015174555A1 publication Critical patent/WO2015174555A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating

Definitions

  • the present invention relates to a discharge starting voltage and holding current supply unit and a multi-wavelength laser device for treating the skin having the unit, and in particular, to supplying a discharge starting voltage and holding current for generating a discharge starting and holding current using a single transformer.
  • the discharge start voltage and the sustain current supplied to the laser resonator generate the discharge start voltage and the sustain current from the respective power generators and supply them to the laser resonator.
  • This example is shown in US Pat. No. 6,888,319.
  • the discharge start voltage is supplied from the discharge start voltage generators 22 and 24 to the laser resonator 18, and a holding current is supplied from the t source 26 to the laser resonator 18.
  • the discharge starting voltage and the holding current need not be supplied to the laser resonator at the same time. Therefore, generating the discharge start voltage and the sustain current from each power generator and supplying the laser resonator causes waste of unnecessary components.
  • the present invention provides a discharge starting voltage and holding current supply unit for generating a discharge starting voltage and a holding current using one transformer, and a multi-wavelength laser device for treating skin having the unit, in order to solve the above problems.
  • the switch driver for turning on / off the switching element and the supply according to the turn on / turn off of the switching element
  • a boost transformer for boosting the switching voltage
  • a rectifier for rectifying the secondary side voltage of the boost transformer
  • a discharge start voltage generator for generating a discharge start voltage from the rectified voltage of the rectifier
  • a rectified voltage of the rectifier and a rectified voltage of the rectifier.
  • a holding current generator for generating a holding current is provided.
  • the multi-wavelength laser apparatus for treating skin includes a switch driver for turning on / off a switching element, and a boost transformer for boosting a switching voltage supplied according to the turning on / off of the switching element. And a rectifier for rectifying the secondary side voltage of the boost transformer, a discharge start voltage generator for generating a discharge start voltage from the rectified voltage of the rectifier, and a holding current from the rectified voltage of the rectifier for generating a sustain current simultaneously. And a selector for selectively connecting the sustain current generator to be supplied and the discharge start voltage generated by the discharge start voltage generator to any one of a plurality of laser resonators.
  • the present invention can generate the discharge starting voltage and the holding current using one boost transformer, thereby preventing unnecessary waste of parts.
  • the present invention has a number of advantages in terms of cost or efficiency because it can output multiple wavelengths to one skin treatment laser device. For example, a skin disease or cosmetic improvement effect that cannot be covered by an alexandrite laser can be covered with an Nd: YAG laser.
  • the present invention can reduce production costs and reduce device volume by using only one high voltage supply circuit for laser output from an Alexandrite laser resonator or an Andy Yag laser resonator.
  • FIG. 1 is a block diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
  • FIGS. 2A and 2B show a circuit diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating a multi-wavelength laser device for treating skin according to an embodiment of the present invention.
  • FIG. 4 is a view showing the power supply unit shown in FIG.
  • FIG. 5 is a diagram illustrating in detail the high voltage generator illustrated in FIG. 4.
  • FIG. 1 is a block diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
  • the discharge starting voltage and the holding current supply unit generate a boosting unit 110, a filter unit 120, a switch driver 130, a boosting transformer 140, a rectifying unit 150, and a discharge starting voltage.
  • the unit 160 and the sustain current generating unit 170 are included.
  • the booster unit 110 boosts the commercial power to about 300V
  • the filter unit 120 removes noise from the boosted voltage
  • the switch driver 130 controls the switching element on / off, and boosts the transformer 140. Is boosted and outputted by the switching voltage supplied according to the turn-on / turn-off of the switching element, the rectifier 150 rectifies the secondary voltage of the boost transformer 140, the discharge start voltage generator 160 is rectifier 150 Generates a discharge starting voltage from the rectified voltage of (), and the sustain current generator 170 generates a sustain current from the rectified voltage of the rectifier 150.
  • FIGS. 2A and 2B show a circuit diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating a multi-wavelength laser device for treating skin according to an embodiment of the present invention.
  • the laser treatment apparatus for skin treatment includes a laser generating unit 10, a power supply unit 200, a UI unit 310, a cooling system unit 320, a handpiece unit 330, and a control unit. 340.
  • the laser generation unit 10 may be composed of an Andy Yag laser resonator 20, an Alexandrite laser resonator 30, an Andy Yag light detection module 40, and an Alexandrite light detection module 50.
  • the Andy Yag laser resonator 20 and the Alexandrite laser resonator 30 are described here as examples of multiple wavelengths.
  • the power supply unit 200 includes the high voltage generating unit 210, the switching unit 220, the discharge starting voltage and the holding current supply unit 230, the selecting unit 240, the transformer unit 250, and the reverse shown in FIG. 4.
  • the voltage prevention unit 260 may be formed.
  • the UI unit 310 includes an FPD display unit 312 for displaying the operation of the dual wavelength laser generation device, and a touch panel unit 314 on the FPD display unit for receiving a user's input.
  • the UI unit 310 may further include a chromaticity sensor 316 and a foot switch 318.
  • the chromaticity sensor 316 detects the skin condition of the user in real time.
  • the control unit 340 may automatically adjust the output of the laser according to the skin condition of the user detected by the chromaticity sensor 316.
  • Foot switch 318 is a user interface for ejecting cooling gas to alleviate pain when a user is undergoing a procedure.
  • the cooling system unit 320 is for adjusting the temperature of the coolant flowing in the alexandrite flash lamp 274 and the Andy Yag flash lamp 284.
  • the temperature of the coolant flowing in the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284 is appropriately 15 degrees to 25 degrees.
  • the cooling system unit 320 can minimize heat damage or heat feeling during laser irradiation of the skin.
  • the handpiece unit 330 is for directly irradiating a laser to the skin of the human body, and may include a rotary switch to adjust the spot size of the laser.
  • the control unit 340 receives input signals from the UI unit 310 and controls the selector 240 and the like.
  • the control unit 340 receives a selection signal for either the Alexandrite laser resonator 30 or the Andy Yag laser resonator 20 from the UI unit 310, the control unit 340 transmits a control signal according to the selection signal to the selection unit 240.
  • Output when a laser output request signal is input from the UI unit 310 (which may form part of the handpiece unit 330), the switching-on signal is output to the switching unit 220.
  • the control unit 340 may automatically adjust the output of the laser according to the skin condition of the user detected by the chromaticity sensor 316. In addition, the control unit 340 may automatically control the high voltage level in the high voltage generator 210 using the detection values of the Alexandrite light detection module 50 and the Andy Yag light detection module 40. In addition, the control unit 340 may control the cooling system unit 320 such that the temperature of the coolant flowing in the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284 is 15 degrees to 25 degrees.
  • FIG. 4 is a view showing the power supply unit shown in FIG.
  • the power supply unit 200 includes a high voltage generation unit 210, a switching unit 220, a discharge starting voltage and a sustain current supply unit 230, a selection unit 240, and a transformer unit 250. ) And a reverse voltage prevention unit 260.
  • the high voltage generator 210 generates and outputs a high voltage necessary for the alexandrite flash lamp 274 and the Andy Yag flash lamp 284.
  • One end of the high voltage output from the high voltage generator 210 is connected to one end of the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284, and the other end of the high voltage output from the high voltage generator 210 is switched.
  • the second and second diodes 220 are connected to the other end of the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284, respectively.
  • the voltage supplied to the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284 by the high voltage generator 210 may be equal to or less than the rated voltage of each flash lamp.
  • FIG. 5 is a diagram illustrating in detail the high voltage generator illustrated in FIG. 4.
  • the high voltage generator 210 includes a filtering part 410, an AC-DC conversion part 420, a high voltage generation part 430, and a capacitor bank 440.
  • the filtering part 410 is composed of filtering elements for removing noise of a power source, and the AC-DC conversion part 420 converts an AC voltage into a DC voltage, including current propagation rectification.
  • the high voltage generation part 430 converts the full-wave rectified DC voltage into a high voltage using a transformer or the like, and the capacitor bank 440 charges the high voltage converted in the high voltage generation part.
  • the high voltage charged in the capacitor bank is supplied to the Alexandrite flash lamp 274 or the Andy Yag flash lamp 284 when the switching unit 220 is turned on.
  • the switching unit 220 is for supplying a high voltage to the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284, and may be formed of an Insulated Gate Bipolar Transistor (IGBT).
  • IGBT Insulated Gate Bipolar Transistor
  • the discharge start voltage and sustain current supply unit supplies a discharge start to an Alexandrite coil (not shown) wound on the Alexandrite flash lamp 274 and an Andy Yag coil (not shown) wound on the Andy Yag flash lamp 284, and the Alexandrite flash For supplying the holding current to the lamp 274 and the Andy Yag flash lamp 284, it may be composed of the discharge starting voltage and the holding current supply unit shown in Figs.
  • the selector 240 is for supplying a discharge start voltage to any one of the alexandrite coil and the endylag coil, and may be formed of a relay.
  • the initial discharge current flows through the alexandrite flash lamp 274, and the discharge current continues to flow when the sustain current is supplied to the alexandrite flash lamp 274. Since the actual discharge of the alexandrite flash lamp 274 is maintained in the alexandrite flash lamp 274, the alexandrite flash lamp 274 emits light even when a high voltage below the rated voltage of the flash lamp is supplied by the operation of the switching unit 220. While pumping, the Andy Yag flash lamp 284 does not emit light, so the Andy Yag rod 122 is not pumped.
  • the transformer unit 250 includes an alexandrite transformer 252 for supplying a discharge starting voltage to the alexandrite coil and an Andy Yag transformer 254 for supplying a discharge starting voltage to the Andy Yag coil.
  • the reverse voltage preventing unit 260 may include a first diode 262 disposed in opposite directions at both ends of the alexandrite flash lamp 274 and a second diode disposed in a current direction between the switching unit 220 and the alexandrite flash lamp 274. 264.
  • the operation of the laser treatment apparatus for skin having the alexandrite laser resonator 30 and the Andy Yag laser resonator 20 is as follows.
  • the user wants to provide the alexandrite laser to the skin for permanent hair removal and tattoo removal of the hair, the user selects the alexandrite laser output menu through the UI unit 310, and the control unit 340 controls the control unit 340.
  • the Alexandrite laser resonator 30 signal is output to the selector 240 according to the Alexandrite laser selection signal input from 310.
  • the selector 240 selects the alexandrite laser resonator 30
  • the discharge start voltage and the discharge start voltage supplied from the sustain current supply unit 230 are supplied to the alexandrite laser resonator 30 and thus the discharge start voltage to the alexandrite coil. Is supplied. Thereafter, a sustain current is supplied to the alexandrite laser resonator 30 from the discharge starting voltage and the sustain current supply unit 230, and thus some actual discharge is maintained in the alexandrite coil.
  • the control unit 340 outputs a switching on signal to the switching unit 220.
  • the control unit 340 may control the switching-on signal such that the repetition rate of the alexandrite laser is 0.5 to 10 Hz and the pulse width is 50 ns.
  • an alexandrite rod (not shown) is pumped, and the pumped alexandrite laser is an alexandrite rear mirror (not shown) and an alexandrite output mirror (not shown). ) And is emitted through the alexandrite output mirror.
  • the alexandrite light detection module 50 detects a part of the alexandrite laser passing through the alexandrite reflector (not shown).
  • the control unit 340 adjusts the high voltage level of the high voltage generator 210 based on the detected value detected by the alexandrite light detection module 50.
  • the present invention can be used in a laser device for skin treatment, and particularly applicable to a multi-wavelength laser device for skin treatment.

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Abstract

The present invention relates to a discharge starting voltage and holding current supply unit, and a skin treatment multi-wavelength laser device including the same. The discharge starting voltage and holding current supply unit according to the present invention provides: a switch driving unit for controlling the turning on/off of a switching element; a booster transformer for boosting a switching voltage supplied according to the turning on/off of the switching element; a rectification unit for rectifying a secondary voltage of the booster transformer; a discharge starting voltage generation unit for generating a discharge starting voltage from a rectification voltage of the rectification unit; and a holding current generation unit for generating the holding current from the rectification voltage of the rectification unit.

Description

방전 시동 전압 및 유지 전류 공급 유닛과 이 유닛을 구비한 피부 치료용 다파장 레이저 장치Discharge starting voltage and holding current supply unit and multiwavelength laser device for skin treatment with the unit
본 발명은 방전 시동 전압 및 유지 전류 공급 유닛과 이 유닛을 구비한 피부 치료용 다파장 레이저 장치에 관한 것으로, 특히 방전 시동 및 유지 전류를 하나의 트랜스를 이용하여 생성하는 방전 시동 전압 및 유지 전류 공급 유닛과 이 유닛을 구비한 피부 치료용 다파장 레이저 장치에 관한 것이다.The present invention relates to a discharge starting voltage and holding current supply unit and a multi-wavelength laser device for treating the skin having the unit, and in particular, to supplying a discharge starting voltage and holding current for generating a discharge starting and holding current using a single transformer. A unit and a multi-wavelength laser device for treating skin having the unit.
레이저 공진기에 공급되는 방전 시동 전압 및 유지 전류는 각각의 전원 생성부로부터 방전 시동 전압 및 유지 전류를 생성하여 레이저 공진기에 공급한다. 이러한 예가 미국등록특허 제6,888,319호에 도시되어 있다. The discharge start voltage and the sustain current supplied to the laser resonator generate the discharge start voltage and the sustain current from the respective power generators and supply them to the laser resonator. This example is shown in US Pat. No. 6,888,319.
미국등록특허 제6,888,319호의 경우 방전 시동 전압이 방전 시동 전압 생성부(22 및 24)로부터 레이저 공진기(18)에 공급되고, 유지 전류가 짐머 소스(26)로부터 레이저 공진기(18)에 공급된다.In the case of US Patent No. 6,888,319, the discharge start voltage is supplied from the discharge start voltage generators 22 and 24 to the laser resonator 18, and a holding current is supplied from the zimmer source 26 to the laser resonator 18.
그러나 방전 시동 전압 및 유지 전류는 동시에 레이저 공진기에 공급될 필요가 없다. 따라서 각각의 전원 생성부로부터 방전 시동 전압 및 유지 전류를 생성하여 레이저 공진기에 공급하는 것은 불필요한 부품들의 낭비를 초래한다.However, the discharge starting voltage and the holding current need not be supplied to the laser resonator at the same time. Therefore, generating the discharge start voltage and the sustain current from each power generator and supplying the laser resonator causes waste of unnecessary components.
본 발명은 상술한 문제점을 해결하기 위해, 방전 시동 전압 및 유지 전류를 하나의 트랜스를 이용하여 생성하는 방전 시동 전압 및 유지 전류 공급 유닛과 이 유닛을 구비한 피부 치료용 다파장 레이저 장치를 제공하는 것을 목적으로 한다.SUMMARY OF THE INVENTION The present invention provides a discharge starting voltage and holding current supply unit for generating a discharge starting voltage and a holding current using one transformer, and a multi-wavelength laser device for treating skin having the unit, in order to solve the above problems. For the purpose of
상술한 목적을 달성하기 위해, 본 발명의 일실시예에 따른 방전 시동 전압 및 유지 전류 공급 유닛은, 스위칭 소자를 턴온/턴오프 제어하는 스위치 구동부와, 상기 스위칭 소자의 턴온/턴오프에 따라 공급된 스위칭 전압을 승압시키는 승압 트랜스와, 상기 승압 트랜스의 2차측 전압을 정류하는 정류부와, 상기 정류부의 정류 전압으로부터 방전 시동 전압을 생성하는 방전 시동 전압 생성부와, 및 상기 정류부의 정류 전압으로부터의 유지 전류를 생성하는 유지 전류 생성부를 제공한다.In order to achieve the above object, the discharge start voltage and the sustain current supply unit according to an embodiment of the present invention, the switch driver for turning on / off the switching element and the supply according to the turn on / turn off of the switching element A boost transformer for boosting the switching voltage, a rectifier for rectifying the secondary side voltage of the boost transformer, a discharge start voltage generator for generating a discharge start voltage from the rectified voltage of the rectifier, and a rectified voltage of the rectifier. A holding current generator for generating a holding current is provided.
본 발명의 일실시예에 따른 피부 치료용 다파장 레이저 장치는, 스위칭 소자를 턴온/턴오프 제어하는 스위치 구동부와, 상기 스위칭 소자의 턴온/턴오프에 따라 공급된 스위칭 전압을 승압시키는 승압 트랜스와, 상기 승압 트랜스의 2차측 전압을 정류하는 정류부와, 상기 정류부의 정류 전압으로부터 방전 시동 전압을 생성하는 방전 시동 전압 생성부와, 상기 정류부의 정류 전압으로부터 유지 전류를 생성하여 복수의 레이저 공진기에 동시에 공급하는 유지 전류 생성부와, 및 상기 방전 시동 전압 생성부에서 생성된 방전 시동 전압을 복수의 레이저 공진기 중 어느 하나에 선택적으로 연결하는 선택부를 제공한다.The multi-wavelength laser apparatus for treating skin according to an embodiment of the present invention includes a switch driver for turning on / off a switching element, and a boost transformer for boosting a switching voltage supplied according to the turning on / off of the switching element. And a rectifier for rectifying the secondary side voltage of the boost transformer, a discharge start voltage generator for generating a discharge start voltage from the rectified voltage of the rectifier, and a holding current from the rectified voltage of the rectifier for generating a sustain current simultaneously. And a selector for selectively connecting the sustain current generator to be supplied and the discharge start voltage generated by the discharge start voltage generator to any one of a plurality of laser resonators.
상술한 구성들에 의해, 본 발명은 하나의 승압 트랜스를 이용하여 방전 시동 전압 및 유지 전류를 생성함으로써, 불필요한 부품들의 낭비를 방지할 수 있다.With the above-described arrangements, the present invention can generate the discharge starting voltage and the holding current using one boost transformer, thereby preventing unnecessary waste of parts.
본 발명은 하나의 피부 치료용 레이저 장치로 다파장을 각각 출력할 수 있어 비용적인 측면이나 효율성 측면에서 많은 이점이 있다. 예를 들어, 알렉산드라이트 레이저가 커버할 수 없는 피부 질환이나 미용 개선 효과를 앤디야그(Nd:YAG) 레이저로 커버할 수 있다.The present invention has a number of advantages in terms of cost or efficiency because it can output multiple wavelengths to one skin treatment laser device. For example, a skin disease or cosmetic improvement effect that cannot be covered by an alexandrite laser can be covered with an Nd: YAG laser.
또한, 본 발명은 알렉산드라이트 레이저 공진기 또는 앤디야그 레이저 공진기로부터 레이저 출력을 위해 하나의 고전압 공급 회로만을 이용함으로 생산 비용을 절감하고 장치 부피를 감소시킬 수 있다. In addition, the present invention can reduce production costs and reduce device volume by using only one high voltage supply circuit for laser output from an Alexandrite laser resonator or an Andy Yag laser resonator.
도 1은 본 발명의 일실시예에 따른 방전 시동 전압 및 유지 전류 공급 유닛의 블록도를 도시한 도면이다.1 is a block diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
도 2a 및 2b는 본 발명의 일실시예에 따른 방전 시동 전압 및 유지 전류 공급 유닛의 회로도를 도시한 도면이다.2A and 2B show a circuit diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
도 3은 본 발명의 일실시예에 따른 피부 치료용 다파장 레이저 장치를 도시한 블록도이다.3 is a block diagram illustrating a multi-wavelength laser device for treating skin according to an embodiment of the present invention.
도 4는 도 3에 도시된 전원 공급 유닛을 도시한 도면이다.4 is a view showing the power supply unit shown in FIG.
도 5는 도 4에 도시된 고전압 생성부를 구체적으로 도시한 도면이다.FIG. 5 is a diagram illustrating in detail the high voltage generator illustrated in FIG. 4.
이하, 첨부된 도면을 참조하여 본 발명에 따른 이미지 복원 장치 및 방법의 바람직한 실시예를 설명한다. 참고로, 아래에서 본 발명을 설명함에 있어서, 본 발명의 구성요소를 지칭하는 용어들은 각각의 구성 요소들의 기능을 고려하여 명명된 것이므로, 본 발명의 기술적 구성요소를 한정하는 의미로 이해되어서는 안 될 것이다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the image restoration apparatus and method according to the present invention. For reference, in the following description of the present invention, terms referring to the components of the present invention are named in consideration of the function of each component, and should not be understood as a meaning of limiting the technical components of the present invention. Will be.
도 1은 본 발명의 일실시예에 따른 방전 시동 전압 및 유지 전류 공급 유닛의 블록도를 도시한 도면이다.1 is a block diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
도 1에 도시된 바와 같이, 방전 시동 전압 및 유지 전류 공급 유닛은 승압부(110), 필터부(120), 스위치 구동부(130), 승압 트랜스(140), 정류부(150), 방전 시동 전압 생성부(160) 및 유지 전류 생성부(170)를 포함한다.As shown in FIG. 1, the discharge starting voltage and the holding current supply unit generate a boosting unit 110, a filter unit 120, a switch driver 130, a boosting transformer 140, a rectifying unit 150, and a discharge starting voltage. The unit 160 and the sustain current generating unit 170 are included.
승압부(110)는 상용 전원을 300V 정도로 승압하며, 필터부(120)는 승압된 전압으로부터 노이즈를 제거하며, 스위치 구동부(130)는 스위칭 소자를 턴온/턴오프 제어하며, 승압 트랜스(140)는 스위칭 소자의 턴온/턴오프에 따라 공급된 스위칭 전압을 승압시켜 출력하며, 정류부(150)는 승압 트랜스(140)의 2차측 전압을 정류하며, 방전 시동 전압 생성부(160)는 정류부(150)의 정류 전압으로부터 방전 시동 전압을 생성하며, 그리고 유지 전류 생성부(170)는 정류부(150)의 정류 전압으로부터의 유지 전류를 생성한다.The booster unit 110 boosts the commercial power to about 300V, the filter unit 120 removes noise from the boosted voltage, the switch driver 130 controls the switching element on / off, and boosts the transformer 140. Is boosted and outputted by the switching voltage supplied according to the turn-on / turn-off of the switching element, the rectifier 150 rectifies the secondary voltage of the boost transformer 140, the discharge start voltage generator 160 is rectifier 150 Generates a discharge starting voltage from the rectified voltage of (), and the sustain current generator 170 generates a sustain current from the rectified voltage of the rectifier 150.
도 2a 및 2b는 본 발명의 일실시예에 따른 방전 시동 전압 및 유지 전류 공급 유닛의 회로도를 도시한 도면이다.2A and 2B show a circuit diagram of a discharge starting voltage and a holding current supply unit according to an embodiment of the present invention.
도 3은 본 발명의 일실시예에 따른 피부 치료용 다파장 레이저 장치를 도시한 블록도이다.3 is a block diagram illustrating a multi-wavelength laser device for treating skin according to an embodiment of the present invention.
도 3에 도시된 바와 같이, 피부 치료용 레이저 장치는 레이저 생성 유닛(10), 전원 공급 유닛(200), UI 유닛(310), 냉각 시스템 유닛(320), 핸드피스 유닛(330) 및 제어 유닛(340)을 포함한다.As shown in FIG. 3, the laser treatment apparatus for skin treatment includes a laser generating unit 10, a power supply unit 200, a UI unit 310, a cooling system unit 320, a handpiece unit 330, and a control unit. 340.
레이저 생성 유닛(10)은 앤디야그 레이저 공진기(20), 알렉산드라이트 레이저 공진기(30), 앤디야그 광 검출 모듈(40) 및 알렉산드라이트 광 검출 모듈(50)으로 이루어질 수 있다. 여기서 앤디야그 레이저 공진기(20) 및 알렉산드라이트 레이저 공진기(30)는 다파장의 예로써 설명된다.The laser generation unit 10 may be composed of an Andy Yag laser resonator 20, an Alexandrite laser resonator 30, an Andy Yag light detection module 40, and an Alexandrite light detection module 50. The Andy Yag laser resonator 20 and the Alexandrite laser resonator 30 are described here as examples of multiple wavelengths.
전원 공급 유닛(200)은 도 4에 도시된 고전압 생성부(210), 스위칭부(220), 방전 시동 전압 및 유지 전류 공급 유닛(230), 선택부(240), 변압기부(250), 역전압 방지부(260)로 이루어질 수 있다.The power supply unit 200 includes the high voltage generating unit 210, the switching unit 220, the discharge starting voltage and the holding current supply unit 230, the selecting unit 240, the transformer unit 250, and the reverse shown in FIG. 4. The voltage prevention unit 260 may be formed.
UI(User Interface) 유닛(310)은 이중 파장 레이저 생성 장치의 동작 등을 표시하기 위한 FPD 디스플레이부(312)와 사용자의 입력 등을 받아들이는 FPD 디스플레이부 상의 터치 패널부(314)로 이루어진다. The UI unit 310 includes an FPD display unit 312 for displaying the operation of the dual wavelength laser generation device, and a touch panel unit 314 on the FPD display unit for receiving a user's input.
또한, UI 유닛(310)은 색도 센서(316) 및 풋 스위치(318)를 더 포함할 수 있다. 색도 센서(316)는 실시간으로 피사용자의 피부 상태를 검출한다. 제어 유닛(340)은 색도 센서(316)에 의해 검출된 피사용자의 피부 상태에 따라 레이저의 출력을 자동으로 조정할 수 있다. 풋 스위치(318)는 피사용자가 시술을 받을 때 통증을 완화할 수 있도록 냉각 가스를 분출하기 위한 사용자 인터페이스이다.In addition, the UI unit 310 may further include a chromaticity sensor 316 and a foot switch 318. The chromaticity sensor 316 detects the skin condition of the user in real time. The control unit 340 may automatically adjust the output of the laser according to the skin condition of the user detected by the chromaticity sensor 316. Foot switch 318 is a user interface for ejecting cooling gas to alleviate pain when a user is undergoing a procedure.
냉각 시스템 유닛(320)은 알렉산드라이트 플래시 램프(274)와 앤디야그 플래시 램프(284)에 흐르는 냉각수의 온도를 조절하기 위한 것이다. 알렉산드라이트 플래시 램프(274)와 앤디야그 플래시 램프(284)에 흐르는 냉각수의 온도는 15도 내지 25도가 적절하다. 이 냉각 시스템 유닛(320)에 의해 피부의 레이저 조사시 열손상이나 열감을 최소화할 수 있다.The cooling system unit 320 is for adjusting the temperature of the coolant flowing in the alexandrite flash lamp 274 and the Andy Yag flash lamp 284. The temperature of the coolant flowing in the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284 is appropriately 15 degrees to 25 degrees. The cooling system unit 320 can minimize heat damage or heat feeling during laser irradiation of the skin.
핸드피스 유닛(330)은 인체의 피부에 레이저를 직접 조사하기 위한 것으로, 로터리 스위치 등을 구비하여 레이저의 스폿 크기를 조절할 수 있다. The handpiece unit 330 is for directly irradiating a laser to the skin of the human body, and may include a rotary switch to adjust the spot size of the laser.
제어 유닛(340)은 UI 유닛(310)으로부터 입력 신호들을 수신받아, 선택부(240) 등을 제어한다. 제어 유닛(340)은 UI 유닛(310)으로부터 알렉산드라이트 레이저 공진기(30) 및 앤디야그 레이저 공진기(20) 중 어느 하나에 대한 선택 신호가 입력되면, 선택부(240)에 선택 신호에 따른 제어 신호를 출력한다. 또한 UI 유닛(310)(핸드피스 유닛(330)의 일부를 이룰 수 있음)으로부터 레이저 출력 요청 신호가 입력되면, 스위칭부(220)에 스위칭 온 신호를 출력한다. The control unit 340 receives input signals from the UI unit 310 and controls the selector 240 and the like. When the control unit 340 receives a selection signal for either the Alexandrite laser resonator 30 or the Andy Yag laser resonator 20 from the UI unit 310, the control unit 340 transmits a control signal according to the selection signal to the selection unit 240. Output In addition, when a laser output request signal is input from the UI unit 310 (which may form part of the handpiece unit 330), the switching-on signal is output to the switching unit 220.
제어 유닛(340)은 색도 센서(316)에 의해 검출된 피사용자의 피부 상태에 따라 레이저의 출력을 자동으로 조정할 수 있다. 또한, 제어 유닛(340)은 알렉산드라이트 광 검출 모듈(50 및 앤디야그 광 검출 모듈(40)의 검출 값들을 이용하여 고전압 생성부(210)에서의 고전압 레벨을 자동으로 제어할 수 있다. 또한 제어 유닛(340)은 알렉산드라이트 플래시 램프(274)와 앤디야그 플래시 램프(284)에 흐르는 냉각수의 온도는 15도 내지 25도가 되도록 냉각 시스템 유닛(320)을 제어할 수 있다.The control unit 340 may automatically adjust the output of the laser according to the skin condition of the user detected by the chromaticity sensor 316. In addition, the control unit 340 may automatically control the high voltage level in the high voltage generator 210 using the detection values of the Alexandrite light detection module 50 and the Andy Yag light detection module 40. In addition, the control unit 340 may control the cooling system unit 320 such that the temperature of the coolant flowing in the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284 is 15 degrees to 25 degrees.
도 4는도 4는 도시된 전원 공급 유닛을 도시한 도면이다.4 is a view showing the power supply unit shown in FIG.
도 4에 도시된 바와 같이, 전원 공급 유닛(200)은 고전압 생성부(210), 스위칭부(220), 방전 시동 전압 및 유지 전류 공급 유닛(230), 선택부(240), 변압기부(250) 및 역전압 방지부(260)를 포함한다.As shown in FIG. 4, the power supply unit 200 includes a high voltage generation unit 210, a switching unit 220, a discharge starting voltage and a sustain current supply unit 230, a selection unit 240, and a transformer unit 250. ) And a reverse voltage prevention unit 260.
고전압 생성부(210)는 알렉산드라이트 플래시 램프(274) 및 앤디야그 플래시 램프(284)에 필요한 고전압을 생성하여 출력한다. 고전압 생성부(210)에서 출력된 고전압의 일단은 알렉산드라이트 플래시 램프(274) 및 앤디야그 플래시 램프(284)의 각각 일단에 연결되고, 또한 고전압 생성부(210)에서 출력된 고전압의 타단은 스위칭부(220)와 제2 다이오드를 통해 알렉산드라이트 플래시 램프(274) 및 앤디야그 플래시 램프(284)의 각각 타단에 연결된다. 고전압 생성부(210)에서 알렉산드라이트 플래시 램프(274) 및 앤디야그 플래시 램프(284)에 공급되는 전압은 각각의 플래시 램프의 정격 전압 이하일 수 있다.The high voltage generator 210 generates and outputs a high voltage necessary for the alexandrite flash lamp 274 and the Andy Yag flash lamp 284. One end of the high voltage output from the high voltage generator 210 is connected to one end of the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284, and the other end of the high voltage output from the high voltage generator 210 is switched. The second and second diodes 220 are connected to the other end of the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284, respectively. The voltage supplied to the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284 by the high voltage generator 210 may be equal to or less than the rated voltage of each flash lamp.
도 5는 도 4에 도시된 고전압 생성부를 구체적으로 도시한 도면이다.FIG. 5 is a diagram illustrating in detail the high voltage generator illustrated in FIG. 4.
도 5에 도시된 바와 같이, 고전압 생성부(210)는 필터링 파트(410), AC-DC 변환 파트(420), 고전압 생성 파트(430), 커패시터 뱅크(440)로 이루어진다. As shown in FIG. 5, the high voltage generator 210 includes a filtering part 410, an AC-DC conversion part 420, a high voltage generation part 430, and a capacitor bank 440.
필터링 파트(410)는 전원의 노이즈 등을 제거하기 위한 필터링 소자들로 이루어지며, AC-DC 변환 파트(420)는 전류 전파 정류를 포함하여 AC 전압을 DC 전압으로 변환한다. 고전압 생성 파트(430)는 전파 정류된 DC 전압을 변압기 등을 이용하여 고전압으로 변환하며, 커패시터 뱅크(440)는 고전압 생성 파트에서 변환된 고전압을 충전한다. 커패시터 뱅크에 충전된 고전압은 스위칭부(220)가 온되면 알렉산드라이트 플래시 램프(274) 또는 앤디야그 플래시 램프(284)에 공급된다.The filtering part 410 is composed of filtering elements for removing noise of a power source, and the AC-DC conversion part 420 converts an AC voltage into a DC voltage, including current propagation rectification. The high voltage generation part 430 converts the full-wave rectified DC voltage into a high voltage using a transformer or the like, and the capacitor bank 440 charges the high voltage converted in the high voltage generation part. The high voltage charged in the capacitor bank is supplied to the Alexandrite flash lamp 274 or the Andy Yag flash lamp 284 when the switching unit 220 is turned on.
스위칭부(220)는 알렉산드라이트 플래시 램프(274) 및 앤디야그 플래시 램프(284)에 고전압을 공급하기 위한 것으로, IGBT(Insulated Gate bipolar Transistor)로 이루어질 수 있다. The switching unit 220 is for supplying a high voltage to the Alexandrite flash lamp 274 and the Andy Yag flash lamp 284, and may be formed of an Insulated Gate Bipolar Transistor (IGBT).
방전 시동 전압 및 유지 전류 공급부는 알렉산드라이트 플래시 램프(274)에 감긴 알렉산드라이트 코일(미도시됨) 및 앤디야그 플래시 램프(284)에 감긴 앤디야그 코일(미도시됨)에 방전 시동을 공급하고, 알렉산드라이트 플래시 램프(274) 및 앤디야그 플래시 램프(284)에 유지 전류를 공급하기 위한 것으로, 도 1 및 도 2에 도시된 방전 시동 전압 및 유지 전류 공급 유닛으로 이루어질 수 있다.The discharge start voltage and sustain current supply unit supplies a discharge start to an Alexandrite coil (not shown) wound on the Alexandrite flash lamp 274 and an Andy Yag coil (not shown) wound on the Andy Yag flash lamp 284, and the Alexandrite flash For supplying the holding current to the lamp 274 and the Andy Yag flash lamp 284, it may be composed of the discharge starting voltage and the holding current supply unit shown in Figs.
선택부(240)는 알렉산드라이트 코일 및 앤디야그 코일 중 어느 하나에 방전 시동 전압을 공급하기 위한 것으로, 릴레이로 이루어질 수 있다. 선택부(240)에 의해 알렉산드라이트 코일에 방전 시동 전압이 공급되면, 알렉산드라이드 플래시 램프(274)는 초기 방전 전류가 흐르고, 알렉산드라이드 플래시 램프(274)에 유지 전류가 공급되면 방전 전류가 계속 흘러 약간의 실방전이 알렉산드라이트 플래시 램프(274)에서 유지되기 때문에, 스위칭부(220)의 동작에 의해 플래시 램프의 정격 전압 이하의 고전압이 공급되어도 알렉산드라이트 플래시 램프(274)는 발광하여 알렉산드라이트 로드(112)를 펌핑하나, 앤디야그 플래시 램프(284)는 발광하지 않으므로 앤디야그 로드(122)는 펌핑되지 않는다. The selector 240 is for supplying a discharge start voltage to any one of the alexandrite coil and the endylag coil, and may be formed of a relay. When the discharge starting voltage is supplied to the Alexandrite coil by the selector 240, the initial discharge current flows through the alexandrite flash lamp 274, and the discharge current continues to flow when the sustain current is supplied to the alexandrite flash lamp 274. Since the actual discharge of the alexandrite flash lamp 274 is maintained in the alexandrite flash lamp 274, the alexandrite flash lamp 274 emits light even when a high voltage below the rated voltage of the flash lamp is supplied by the operation of the switching unit 220. While pumping, the Andy Yag flash lamp 284 does not emit light, so the Andy Yag rod 122 is not pumped.
변압기부(250)는 알렉산드라이트 코일에 방전 시동 전압을 공급하기 위한 알렉산드라이트 변압기(252)와 앤디야그 코일에 방전 시동 전압을 공급하기 위한 앤디야그 변압기(254)를 포함한다.The transformer unit 250 includes an alexandrite transformer 252 for supplying a discharge starting voltage to the alexandrite coil and an Andy Yag transformer 254 for supplying a discharge starting voltage to the Andy Yag coil.
역전압 방지부(260)는 알렉산드라이트 플래시 램프(274)의 양단에 역방향으로 배치된 제1 다이오드(262)와 스위칭부(220)와 알렉산드라이트 플래시 램프(274) 사이에 전류 방향으로 배치된 제2 다이오드(264)를 포함한다.The reverse voltage preventing unit 260 may include a first diode 262 disposed in opposite directions at both ends of the alexandrite flash lamp 274 and a second diode disposed in a current direction between the switching unit 220 and the alexandrite flash lamp 274. 264.
도 1 내지 도 5에 도시된 알렉산드라이트 레이저 공진기(30)와 앤디야그 레이저 공진기(20)를 구비한 피부 치료용 레이저 장치의 동작은 다음과 같다.1 to 5, the operation of the laser treatment apparatus for skin having the alexandrite laser resonator 30 and the Andy Yag laser resonator 20 is as follows.
만약 털의 영구 제모 및 문신 제거 등을 위해 알렉산드라이트 레이저를 피부에 제공하고자 하는 경우 사용자는 UI 유닛(310)을 통해 알렉산드라이트 레이저 출력 메뉴를 선택하고 제어 유닛(340)은 제어 유닛(340)은 UI 유닛(310)으로부터 입력된 알렉산드라이트 레이저 선택 신호에 따라 선택부(240)에 알렉산드라이트 레이저 공진기(30) 신호를 출력한다.If the user wants to provide the alexandrite laser to the skin for permanent hair removal and tattoo removal of the hair, the user selects the alexandrite laser output menu through the UI unit 310, and the control unit 340 controls the control unit 340. The Alexandrite laser resonator 30 signal is output to the selector 240 according to the Alexandrite laser selection signal input from 310.
선택부(240)가 알렉산드라이트 레이저 공진기(30)를 선택하면, 방전 시동 전압 및 유지 전류 공급 유닛(230)로부터 공급된 방전 시동 전압이 알렉산드라이트 레이저 공진기(30)에 공급되고 따라서 알렉산드라이트 코일에 방전 시동 전압이 공급된다. 그 후 알렉산드라이트 레이저 공진기(30)에 방전 시동 전압 및 유지 전류 공급 유닛(230)로부터 유지 전류가 공급되고 따라서 알렉산드라이트 코일에 약간의 실방전이 유지된다. When the selector 240 selects the alexandrite laser resonator 30, the discharge start voltage and the discharge start voltage supplied from the sustain current supply unit 230 are supplied to the alexandrite laser resonator 30 and thus the discharge start voltage to the alexandrite coil. Is supplied. Thereafter, a sustain current is supplied to the alexandrite laser resonator 30 from the discharge starting voltage and the sustain current supply unit 230, and thus some actual discharge is maintained in the alexandrite coil.
그 후 UI 유닛(310)으로부터 레이저 출력 요청 신호가 입력되면, 제어 유닛(340)은 스위칭부(220)에 스위칭 온 신호를 출력한다. 이 경우 제어 유닛(340)은 알렉산드라이트 레이저의 반복 비율이 0.5~10Hz, 펄스폭이 50ns가 되도록 스위칭 온 신호를 제어할 수 있다. Thereafter, when the laser output request signal is input from the UI unit 310, the control unit 340 outputs a switching on signal to the switching unit 220. In this case, the control unit 340 may control the switching-on signal such that the repetition rate of the alexandrite laser is 0.5 to 10 Hz and the pulse width is 50 ns.
알렉산드라이트 챔버(111)에 고전압 생성부(210)로부터 고전압이 공급되면, 알렉산드라이트 로드(미도시됨)는 펌핑되고, 펌핑된 알렉산드라이트 레이저는 알렉산드라이트 리어 미러(미도시됨)와 알렉산드라이트 출력 미러(미도시됨) 사이에서 공진되고 알렉산드라이트 출력 미러를 통해 방출된다. When a high voltage is supplied to the alexandrite chamber 111 from the high voltage generator 210, an alexandrite rod (not shown) is pumped, and the pumped alexandrite laser is an alexandrite rear mirror (not shown) and an alexandrite output mirror (not shown). ) And is emitted through the alexandrite output mirror.
한편, 알렉산드라이트 광 검출 모듈(50)은 알렉산드라이트 반사경(미도시됨)을 투과한 알렉산드라이트 레이저의 일부를 검출한다. 제어 유닛(340)은 알렉산드라이트 광 검출 모듈(50에 검출된 검출값에 기초하여 고전압 생성부(210)의 고전압 레벨을 조정한다.Meanwhile, the alexandrite light detection module 50 detects a part of the alexandrite laser passing through the alexandrite reflector (not shown). The control unit 340 adjusts the high voltage level of the high voltage generator 210 based on the detected value detected by the alexandrite light detection module 50.
본 발명의 보호 범위는 이하 특허청구범위에 의하여 해석되어야 마땅할 것이다. 또한, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 본 발명의 본질적인 특성에서 벗어나지 않는 범위에서 다양한 수정 및 변형이 가능할 것인 바, 본 발명과 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.The protection scope of the present invention should be interpreted by the following claims. In addition, one of ordinary skill in the art to which the present invention pertains will be capable of various modifications and variations without departing from the essential characteristics of the present invention, all technical ideas within the scope equivalent to the present invention of the present invention It should be interpreted as being included in the scope of rights.
본 발명은 피부 치료용 레이저 장치에 이용할 수 있으며, 특히 피부 치료용 다파장 레이저 장치에 적용 가능하다.The present invention can be used in a laser device for skin treatment, and particularly applicable to a multi-wavelength laser device for skin treatment.

Claims (2)

  1. 스위칭 소자를 턴온/턴오프 제어하는 스위치 구동부와,A switch driver for turning on / off the switching element;
    상기 스위칭 소자의 턴온/턴오프에 따라 공급된 스위칭 전압을 승압시키는 승압 트랜스와,A boost transformer for boosting the supplied switching voltage according to the turning on / off of the switching element;
    상기 승압 트랜스의 2차측 전압을 정류하는 정류부와,A rectifier for rectifying the secondary voltage of the boost transformer;
    상기 정류부의 정류 전압으로부터 방전 시동 전압을 생성하는 방전 시동 전압 생성부와, 및A discharge starting voltage generation unit generating a discharge starting voltage from the rectified voltage of the rectifying unit, and
    상기 정류부의 정류 전압으로부터의 유지 전류를 생성하는 유지 전류 생성부를 포함하는 것을 특징으로 하는 방전 시동 전압 및 유지 전류 공급 유닛.And a sustain current generator for generating a sustain current from the rectified voltage of said rectifier.
  2. 서로 다른 레이저 파장을 출력하는 복수의 레이저 공진기와,A plurality of laser resonators for outputting different laser wavelengths,
    스위칭 소자를 턴온/턴오프 제어하는 스위치 구동부와,A switch driver for turning on / off the switching element;
    상기 스위칭 소자의 턴온/턴오프에 따라 공급된 스위칭 전압을 승압시키는 승압 트랜스와,A boost transformer for boosting the supplied switching voltage according to the turning on / off of the switching element;
    상기 승압 트랜스의 2차측 전압을 정류하는 정류부와,A rectifier for rectifying the secondary voltage of the boost transformer;
    상기 정류부의 정류 전압으로부터 방전 시동 전압을 생성하는 방전 시동 전압 생성부와, A discharge starting voltage generation unit generating a discharge starting voltage from the rectified voltage of the rectifying unit;
    상기 정류부의 정류 전압으로부터 유지 전류를 생성하여 복수의 레이저 공진기에 동시에 공급하는 유지 전류 생성부와, 및A holding current generating unit generating a holding current from the rectified voltage of the rectifying unit and simultaneously supplying the holding current to a plurality of laser resonators;
    상기 방전 시동 전압 생성부에서 생성된 방전 시동 전압을 복수의 레이저 공진기 중 어느 하나에 선택적으로 연결하는 선택부를 포함하는 것을 특징으로 하는 피부 치료용 다파장 레이저 장치.And a selector for selectively connecting the discharge start voltage generated by the discharge start voltage generator to any one of a plurality of laser resonators.
PCT/KR2014/004249 2014-05-13 2014-05-13 Discharge starting voltage and holding current supply unit, and skin treatment multi-wavelength laser device including same WO2015174555A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11162685A (en) * 1997-11-28 1999-06-18 Mitsubishi Electric Corp High-pressure discharge-lamp lighting device
KR20010006827A (en) * 1999-03-19 2001-01-26 가타오카 마사타카 Lighting device for discharge lamp
JP2001273996A (en) * 2000-01-18 2001-10-05 Ricoh Co Ltd Discharge lamp lighting device and image processing apparatus equipped with it
KR100639483B1 (en) * 2004-03-29 2006-10-26 주식회사 포스투포스 electrodeless discharge lamp electric source apparatus
KR101153382B1 (en) * 2012-02-24 2012-06-07 비손메디칼 주식회사 Laser apparatus for skin treatment having alexandrite laser resonator and nd:yag laser resonator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11162685A (en) * 1997-11-28 1999-06-18 Mitsubishi Electric Corp High-pressure discharge-lamp lighting device
KR20010006827A (en) * 1999-03-19 2001-01-26 가타오카 마사타카 Lighting device for discharge lamp
JP2001273996A (en) * 2000-01-18 2001-10-05 Ricoh Co Ltd Discharge lamp lighting device and image processing apparatus equipped with it
KR100639483B1 (en) * 2004-03-29 2006-10-26 주식회사 포스투포스 electrodeless discharge lamp electric source apparatus
KR101153382B1 (en) * 2012-02-24 2012-06-07 비손메디칼 주식회사 Laser apparatus for skin treatment having alexandrite laser resonator and nd:yag laser resonator

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