WO2019013425A1 - 레이저 장치 및 이 레이저 장치에서의 레이저 출력 제어 방법 - Google Patents
레이저 장치 및 이 레이저 장치에서의 레이저 출력 제어 방법 Download PDFInfo
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- WO2019013425A1 WO2019013425A1 PCT/KR2018/002995 KR2018002995W WO2019013425A1 WO 2019013425 A1 WO2019013425 A1 WO 2019013425A1 KR 2018002995 W KR2018002995 W KR 2018002995W WO 2019013425 A1 WO2019013425 A1 WO 2019013425A1
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- laser
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/0613—Apparatus adapted for a specific treatment
- A61N5/0616—Skin treatment other than tanning
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- 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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
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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
- A61B18/203—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 applying laser energy to the outside of the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/067—Radiation therapy using light using laser light
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00022—Sensing or detecting at the treatment site
- A61B2017/00057—Light
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00022—Sensing or detecting at the treatment site
- A61B2017/00106—Sensing or detecting at the treatment site ultrasonic
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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
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00452—Skin
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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
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00642—Sensing and controlling the application of energy with feedback, i.e. closed loop control
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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
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00779—Power or energy
- A61B2018/00785—Reflected power
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0626—Monitoring, verifying, controlling systems and methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/063—Radiation therapy using light comprising light transmitting means, e.g. optical fibres
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0635—Radiation therapy using light characterised by the body area to be irradiated
- A61N2005/0643—Applicators, probes irradiating specific body areas in close proximity
- A61N2005/0644—Handheld applicators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0664—Details
- A61N2005/0665—Reflectors
- A61N2005/0666—Reflectors for redirecting light to the treatment area
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0664—Details
- A61N2005/0667—Filters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/105—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using a laser alignment system
Definitions
- the present invention relates to a laser apparatus, and more particularly, to a laser apparatus having a laser output control unit and a laser output control method in the laser apparatus.
- the present invention has been supported by the National R & D Project of the Ministry of Industry, Trade and Industry as described below.
- a laser apparatus generates a laser beam having a predetermined wavelength and an energy density (energy per unit area) for surgical or cosmetic laser treatment and treatment, and irradiates the laser beam onto a target (for example, a skin to be treated / treated) through a handpiece.
- a tip 20 composed of a base portion 21, a support portion 22, and a guide portion 23 is attached to the distal end portion of the handpiece 10, for example, And the user irradiates the laser in a state in which the handpiece 10 stands vertically to the target (for example, the skin S) and the guide portion 23 is in contact with the skin S as shown in Fig. 1 .
- the height from the lower end of the base portion 21 of the tip 20 to the skin S is constantly H by the support portion 22 and the guide portion 23, And the laser output is set on the basis of this state.
- the laser device is designed to irradiate the laser with a collimated beam L1 having the same energy density (J / cm2) over the cross-sectional area of the laser
- the laser output from the laser 10 can be irradiated in a form such that the cross-sectional area of the laser increases or decreases according to the distance, for example, the shape of the laser L2 in FIG. 2 (a)
- the irradiated area A is changed according to the distance H, so that the energy density of the laser received by the actual skin is different from the energy density initially set.
- the actual energy density of the laser at the treatment site is set to a predetermined energy density It is important to always keep.
- a plurality of distance sensors are mounted on the distal end of the handpiece, the inclination and distance of the handpiece are calculated based on the distance value measured from the distance sensor, and the effective area of the target is calculated,
- a laser device capable of controlling the laser output so as to keep the energy density constant at all times.
- a laser output control method of a laser apparatus having a laser generator and a handpiece for irradiating a laser generated by the laser generator toward a target, Measuring a distance between the plurality of distance sensors and the target by a plurality of distance sensors disposed along the circumference of the plurality of distance sensors; Calculating an effective area, which is a region where the laser is actually irradiated to the target, based on the distance between the distance sensor and the target; And increasing or decreasing a laser output to irradiate the laser with the energy density set to the effective area at a predetermined energy density.
- a laser apparatus comprising: a laser generating unit for generating a laser; A controller for controlling an output of the laser generated by the laser generator; A handpiece for outputting the laser generated by the laser generator through one end; And a plurality of distance sensors attached along the periphery of the one end of the handpiece, wherein the control unit is configured to determine whether or not the laser is actually irradiated to the target based on the distance from the target measured by the plurality of distance sensors And a laser output is increased or decreased in order to irradiate the laser with a predetermined energy density to the effective area.
- the effective area of the target can be calculated based on the distance measurement value measured by the distance sensor mounted on the handpiece, and the laser output value for obtaining a constant energy density can be obtained from this,
- the target energy density can always be kept constant even if the tilting or the distance from the target changes.
- the at least one measured value measured by the distance sensor is greater than a preset predetermined distance value or the inclination of the handpiece is less than a predetermined angle.
- FIG. 1 is a view for explaining a handpiece of a conventional laser device
- Figure 2 shows an exemplary laser shape output from a handpiece
- 3 and 4 are views for explaining a handpiece according to an embodiment of the present invention.
- FIG. 5 is a block diagram of a laser device according to an embodiment of the present invention.
- FIG. 6 is a diagram showing an exemplary laser shape when the handpiece is tilted and irradiated
- FIG. 7 is a view for explaining a laser output control method according to an embodiment of the present invention.
- FIGS. 3 and 4 schematically illustrate a handpiece according to one embodiment of the present invention
- FIG. 5 shows a block diagram of an exemplary laser device including such a handpiece.
- a handpiece 10 is a member having a substantially cylindrical shape so that a user can hold the handpiece 10.
- An optical fiber 60 (see FIG. 3) is provided at one end And the laser generated in the laser generating unit 50 is guided to the handpiece 10 through the optical fiber 60 and then the other end of the handpiece 10 (the lower end in FIG. 3) As shown in FIG.
- a plurality of optical elements such as an optical fiber, a lens, and a mirror, necessary for guiding the laser, may be disposed inside the handpiece 10.
- the light output from the handpiece 10 may be any one of a collimated beam, a focused beam, and a defocused beam, and the laser energy density, wavelength, May vary depending on the specific implementation situation in which the laser device is used.
- the tip 20 may be attached to the lower end of the handpiece 10.
- the tip 20 may be detachably coupled to the handpiece 10.
- the tip 20 includes a base portion 21 coupled to a lower end of the handpiece 10, a support portion 22 extending downwardly from the base portion 21, And a semicircular guide portion 23 connected to the guide portion 23.
- the base portion 21 can be detachably coupled to the lower end of the handpiece 10, for example, by screwing.
- the support portion 22 serves to support the guide portion 23 so that the semicircular guide portion 23 can be disposed at a predetermined distance downward from the base portion 21.
- the guide part 23 may have a semicircular shape or a ring shape and is designed so that the laser output from the handpiece 10 passes through the central axis of the guide part 23. Therefore, the user can guide the center of the guide portion 23 and the target to be irradiated with the laser easily.
- the embodiment of the present invention is not limited to the configuration of the handpiece 10 and the tip 20 shown in the drawings, but can be modified in various configurations.
- a handpiece having no tip 20 may be used, although it has been described that the tip 20 is attached to the handpiece 10 in the drawings.
- the guide portion 23 of the tip 20 may be, for example, in an annular shape, and the tip 20 may not include the support portion 22 and the guide portion 23.
- the handpiece 10 further comprises a plurality of distance sensors 30.
- the distance sensors 30 are attached to the sides of the base portion 21 of the tip 20 at regular intervals.
- the distance sensor 30 may be disposed about the lower end of the handpiece 10.
- the tip 20 may not be attached to the handpiece 10 and a plurality of distance sensors 30 may be attached to the periphery of the lower end of the handpiece 10 at regular intervals have.
- the handpiece 10 may include two distance sensors 30, wherein the distance sensor 30 is positioned along the periphery of the lower end of the handpiece 10 (Along the circumference of the base portion 21).
- the handpiece 10 may include three distance sensors 30, in this case around the lower end of the handpiece 10 or along the circumference of the base portion 21 at 120 degree intervals Can be installed.
- the number of the distance sensors 30 is not particularly limited and three or four distance sensors 30 may be installed in a preferred embodiment.
- the distance sensor 30 may be, for example, an IR sensor or an ultrasonic sensor, or may be implemented as a sensor that measures distances according to various conventional methods.
- the handpiece 10 to which the tip 20 is attached is positioned vertically toward the patient's skin S as shown in Figure 3 and the skin S is removed from the base portion 21 of the tip 20,
- the distance to the skin S measured by the distance sensor 30 attached to the side surface of the base portion 21 is denoted by d.
- the distance d measured by each of the plurality of distance sensors 30 is d1, d2, d3, ... And so on.
- the laser device may include a handpiece 10, a distance sensor 30, a control unit 40, and a laser generating unit 50.
- the handpiece 10 and the distance sensor 30 have been described above with reference to FIGS. 3 and 4, and a description thereof will be omitted.
- the laser generation unit 50 is a device for generating a laser, and the control unit 40 can control the output of the laser generated by the laser generation unit 50.
- the laser generating unit 50 may include a conventionally known laser generating apparatus.
- the laser generating unit 50 includes components such as a known laser gain medium such as Nd: YAG, Alexandrite, and Ruby, a flash lamp, a reflector, a mirror, and a power supply unit can do.
- the flash lamp is disposed around the laser gain medium and can receive power from the power supply to illuminate the gain medium with excitation light.
- the reflector is arranged to surround the flash lamp so that the excitation light emitted from the flash lamp can be irradiated with the laser gain medium without being lost.
- the laser gain medium receives the excitation light from the flash lamp, the light is reciprocated between the mirrors of both sides, and amplification by induced emission can be generated to generate laser light.
- the laser generated in the laser generating unit 50 may be guided through the optical fiber 60, for example, to be transmitted to the handpiece 10 and output through one end of the handpiece 10.
- the laser beam may be delivered to the handpiece 10 in an alternative to the optical fiber 60.
- a light guiding arm having a plurality of mirrors may be disposed between the laser generating unit 50 and the handpiece 10, It may be transmitted to the handpiece 10, or any other known light guide means may be used.
- the control unit 40 can control the output of the laser generated by the laser generating unit 50. In one embodiment, the control unit 40 receives a distance measurement from the distance sensor 30 as a measurement signal and sends a control signal to the laser generator 50 to control the laser output .
- control unit 40 calculates the effective area, which is a region where the laser is actually irradiated to the target, based on the distance d to the target measured by the plurality of distance sensors 30, It is possible to control the laser output to increase or decrease to irradiate the laser at a predetermined energy density.
- the control unit 40 calculates the slope of the handpiece with respect to the target and the distance between the target and the handpiece based on the distance d to the measured target,
- the effective area of the target can be calculated based on the inclination and distance of the target.
- the control unit 40 may previously store information about the characteristics of the output laser, such as the output angle and diameter of the laser output from the handpiece 10, and the information about the inclination and distance of the handpiece And the effective area of the target can be calculated based on the calculated value.
- the control unit 40 controls the laser output so that the laser can be irradiated to the effective area of the target at a predetermined energy density.
- FIG. Assume that the handpiece 10 is tilted at a predetermined angle [theta] to the patient's target (skin S) as shown in Fig. 6 to irradiate the laser L. [ For convenience of explanation, the support portion 22 and the guide portion 23 of the tip 20 are omitted and only two distance sensors 31 and 32 are shown.
- the laser L actually designed to output the collimated beam at the handpiece 10 is not a complete collimated beam shape but has a predetermined output angle alpha and is spaced a predetermined distance h from the target I suppose.
- the distance h between the target and the handpiece 10 is set at the lowermost end of the handpiece 10 on the axis of the central axis C of the handpiece 10 (assuming that it is the same as the center axis of the laser L) And the distance from the target to the target.
- step S110 the distance between the distance sensors 31 and 32 and the target is measured.
- the 'distance between the distance sensor and the target' is a distance from each distance sensor 31 and 32 along a line parallel to the center axis (or the center axis of the laser L) C of the handpiece 10
- the skin S). 6 the first distance sensor 31 measures the distance d1 to the first point P1 of the skin S and the second distance sensor 32 measures the distance d2 to the second point P1 of the skin S, And the distance d2 from the center to the center P2 is measured.
- more distance sensors such as third and fourth distance sensors may be provided, and each distance sensor will measure distances d3, d4, ... to the skin.
- step S120 the effective area, which is a region irradiated with a laser beam on the target, is calculated based on the distances d1, d2, d3, ... between the distance sensors 31 and 32 and the target.
- 'effective area' means the area of the target (skin) where the laser L is actually irradiated, that is, the area indicated by 'A' in FIG.
- step S121 the slope? Of the handpiece 10 and the slope? Of the handpiece 10 are calculated based on the distances d1, d2, And calculates the distance h.
- the inclination [theta] means the inclination of the center axis (or the center axis of the laser L) C of the handpiece 10 with respect to the target (i.e., the skin S) May mean the distance between the lowermost end of the handpiece 10 and the target on the center axis C.
- the arrangement relationships among the plurality of distance sensors 31, 32, ... are known in advance, when the distances d1, d2, ... measured by the distance sensors 31, 32, (For example, the length of the major axis, the length of the minor axis, the area, and the like) passing through the plurality of points P1, P2, ... can be calculated, and thus the elliptical characteristics and the measured values d1, d2, ..., the degree to which the handpiece 10 is inclined with respect to the target and the distance from the target can be calculated.
- data relating to a relative arrangement relation between the plurality of distance sensors 31, 32, ... may be stored in advance in any storage means (for example, a memory)
- An elliptical characteristic passing through the points P1, P2,... Along the distances d1, d2, ... measured by the distance sensor may be stored in advance in the form of a lookup table, for example.
- the inclination [theta] and the distance h of the handpiece based on the elliptical characteristic may be stored in advance in the form of a lookup table, for example.
- the area to be irradiated with the laser L based on the inclination [theta] and the distance h, that is, the effective area A, is calculated in step S122 by calculating the inclination [theta] Can be calculated. That is, information including the output angle? And the cross-sectional area) of the laser L output from the handpiece 10 in advance, the laser characteristics and the slope? Of the handpiece and the distance? the effective area A can be calculated on the basis of the equation (h). In this case also, for example, the effective area A according to the characteristics (the output angle?, The cross sectional area, etc.) of the laser and the inclination? And the distance h of the handpiece may be stored in advance by a lookup table or the like And calculating the effective area A according to a predetermined equation using the laser characteristic and the slope (?) And the distance (h) of the handpiece as variables.
- the laser output can be increased or decreased in order to irradiate the laser L at the predetermined energy density to the effective area A in step S130.
- the predetermined energy density of the laser is, for example, an effective area (hereinafter referred to as " reference effective area ”) when the handpiece 10 is apart from the target (skin S)
- the predetermined distance h from the target and the reference effective area? To adjust the laser output to maintain the same energy density.
- the laser output control method for keeping the energy density of the target at the same level has been described in the exemplary method of FIG. 7, the laser output may be controlled by a method other than the above-described method.
- a method of calculating the effective area calculated by calculating the inclination (?) And the distance (h) of the handpiece from the distances d1, d2, ... measured by the distance sensor has been described.
- the effective area may be calculated without calculating the inclination (?) Or the distance (h) of the handpiece. It will therefore be appreciated by those skilled in the art that the method of Figure 7 is but one exemplary method of determining the effective area.
- a calculation operation for calculating the effective area based on the distances d1, d2, ... measured by the distance sensor may be executed in the control unit 40, but in an alternative embodiment, Or may be performed in a separate operation unit (not shown).
- the control unit 40 or the distance sensor 30 may transmit the distance measurement values d1, d2, ... to the operation unit and the calculation unit may calculate the effective area A and transmit the calculated effective area A to the control unit 40.
- the control unit 40 may control the temporary ON / OFF of the laser output based on the one or more distance values d1, d2, ... measured by the distance sensor. For example, when a user outputs a laser beam toward a person or object without directing the handpiece 10 toward the target S, there is a danger of an accident and the user tilts the handpiece 10 excessively, It may happen that the desired medical / cosmetic effect can not be obtained. Therefore, in order to solve such a problem, in one embodiment of the present invention, the control unit 40 can control the laser output to be turned on / off based on the distances d1, d2, ... measured by the distance sensor.
- the control unit 40 determines that the handpiece 10 It can be determined that the handpiece 10 is too far away from the target or the handpiece 10 is heading to something other than the target, and the laser output can be turned off.
- the control unit 40 can not obtain a desired medical / cosmetic effect because the handpiece 10 is excessively inclined toward the target And the laser output can be turned off.
- control unit 40 can notify the user of the temporary off of the laser output by turning on a warning sound or a warning lamp, and when the distance d1, d2, ... or the inclination? It is possible to notify the user by using lighting or the like.
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Abstract
Description
Claims (14)
- 레이저 생성부 및 이 레이저 생성부에서 생성되는 레이저를 타겟을 향해 조사하는 핸드피스를 구비한 레이저 장치의 레이저 출력 제어 방법으로서,레이저가 출력되는 핸드피스의 일 단부의 둘레를 따라 배치된 복수개의 거리센서에 의해 상기 복수개의 거리센서와 타겟 사이의 각각의 거리(d)를 측정하는 단계;상기 거리센서와 타겟 사이의 거리(d)에 기초하여, 타겟에 레이저가 실제로 조사되는 영역인 유효 면적을 산출하는 단계; 및상기 유효 면적에 기설정된 에너지밀도로 레이저를 조사하기 위해 레이저 출력을 증감하는 단계;를 포함하는 것을 특징으로 하는 레이저 출력 제어 방법.
- 제 1 항에 있어서,상기 복수개의 거리센서는 3개 이상의 거리센서이고, 이 복수개의 거리센서들이 핸드피스의 상기 일 단부의 둘레를 따라 일정 간격으로 배치된 것을 특징으로 하는 레이저 출력 제어 방법.
- 제 1 항에 있어서,상기 복수개의 거리센서 중 어느 하나와 타겟 사이의 측정된 거리가 기설정된 소정 거리 이상이면 레이저 출력을 중단하는 단계;를 더 포함하는 것을 특징으로 하는 레이저 출력 제어 방법.
- 제 1 항에 있어서, 상기 타겟의 유효 면적을 산출하는 단계는,측정된 복수개의 상기 거리(d)에 기초하여, 타겟에 대한 핸드피스의 기울기(θ) 및 타겟과 핸드피스 사이의 거리(h)를 산출하는 단계; 및상기 핸드피스의 기울기(θ) 및 거리(h)에 기초하여 상기 타겟의 유효 면적을 산출하는 단계;를 포함하는 것을 특징으로 하는 레이저 출력 제어 방법.
- 제 4 항에 있어서, 상기 타겟의 유효 면적을 산출하는 단계는,핸드피스에서 출력되는 레이저의 출력 각도(α) 및 직경에 기초하여, 상기 핸드피스의 기울기(θ) 및 거리(h)에 따른 타겟의 유효 면적을 산출하는 것을 특징으로 하는 레이저 출력 제어 방법.
- 제 4 항에 있어서,상기 산출된 핸드피스의 기울기(θ)가 기설정된 소정 각도 이하인 경우 레이저 출력을 중단하는 단계;를 더 포함하는 것을 특징으로 하는 레이저 출력 제어 방법.
- 제 1 항에 있어서,상기 핸드피스에서 출력되는 레이저가 콜리메이티드 빔, 포커스드 빔, 또는 디포커스드 빔인 것을 특징으로 하는 레이저 출력 제어 방법.
- 레이저 장치로서,레이저를 생성하는 레이저 생성부(50);상기 레이저 생성부에서 생성되는 레이저의 출력을 제어하는 제어부(40);상기 레이저 생성부에서 생성된 레이저를 일 단부를 통해 출력하는 핸드피스(10); 및상기 핸드피스의 상기 일 단부의 둘레를 따라 부착된 복수개의 거리센서(30);를 포함하고,상기 제어부는, 상기 복수개의 거리센서가 측정한 타겟과의 거리(d)에 기초하여, 타겟에 레이저가 실제로 조사되는 영역인 유효 면적을 산출하고, 이 유효 면적에 기설정된 에너지밀도로 레이저를 조사하기 위해 레이저 출력을 증감하도록 구성된 것을 특징으로 하는 레이저 장치.
- 제 8 항에 있어서,상기 복수개의 거리센서는 3개 이상의 거리센서이고, 이 복수개의 거리센서들이 핸드피스의 상기 일 단부의 둘레를 따라 일정 간격으로 배치된 것을 특징으로 하는 레이저 장치.
- 제 8 항에 있어서,상기 복수개의 거리센서 중 어느 하나와 타겟 사이의 측정된 거리가 기설정된 소정 거리 이상이면 상기 제어부가 레이저 출력을 중단시키는 것을 특징으로 하는 레이저 장치.
- 제 8 항에 있어서, 상기 제어부가, 상기 측정된 타겟과의 거리(d)에 기초하여 타겟에 대한 핸드피스의 기울기(θ) 및 타겟과 핸드피스 사이의 거리(h)를 산출하고, 상기 핸드피스의 기울기(θ) 및 거리(h)에 기초하여 상기 타겟의 유효 면적을 산출하도록 구성된 것을 특징으로 하는 레이저 장치.
- 제 11 항에 있어서, 상기 제어부가, 핸드피스에서 출력되는 레이저의 출력 각도(α) 및 직경에 기초하여, 상기 핸드피스의 기울기(θ) 및 거리(h)에 따른 타겟의 유효 면적을 산출하도록 구성된 것을 특징으로 하는 레이저 장치.
- 제 11 항에 있어서, 상기 산출된 핸드피스의 기울기(θ)가 기설정된 소정 각도 이하이면 상기 제어부가 레이저 출력을 중단시키는 것을 특징으로 하는 레이저 장치.
- 제 8 항에 있어서,상기 핸드피스에서 출력되는 레이저가 콜리메이티드 빔, 포커스드 빔, 또는 디포커스드 빔인 것을 특징으로 하는 레이저 장치.
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