KR101782784B1 - Laser induced breakdown spectroscopy apparatus and highly sensitive handpiece - Google Patents

Laser induced breakdown spectroscopy apparatus and highly sensitive handpiece Download PDF

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Publication number
KR101782784B1
KR101782784B1 KR1020160023734A KR20160023734A KR101782784B1 KR 101782784 B1 KR101782784 B1 KR 101782784B1 KR 1020160023734 A KR1020160023734 A KR 1020160023734A KR 20160023734 A KR20160023734 A KR 20160023734A KR 101782784 B1 KR101782784 B1 KR 101782784B1
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South Korea
Prior art keywords
light
handpiece
elliptical cavity
focus
disposed
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KR1020160023734A
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Korean (ko)
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KR20170101053A (en
Inventor
변성현
민완기
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스페클립스 주식회사
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
    • 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
    • H01S3/0014—Monitoring arrangements not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
    • G01J2003/423—Spectral arrangements using lasers, e.g. tunable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/061—Sources
    • G01N2201/06113—Coherent sources; lasers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/08—Optical fibres; light guides

Abstract

The present invention provides a laser induced discharge spectroscopy device and a laser handpiece. This laser induced discharge spectroscopy apparatus comprises a pulse laser light source for outputting a pulsed laser beam; A handpiece which receives the pulsed laser beam and irradiates the pulsed laser beam on the object to be processed, and collects the generated radiation of the plasma; An optical fiber for transmitting the radiation light collected from the handpiece; A spectroscope for receiving a radiated light from the optical fiber and measuring a radiation spectrum according to a wavelength; And a processor for analyzing the radiation spectrum. The handpiece includes a handpiece body portion having an elliptical cavity therein; And a light collector disposed at a first focus of the elliptical cavity to collect the reflected radiation reflected from the elliptical cavity. The handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity, and the second focus of the elliptical cavity is disposed on the article to be treated.

Description

[0001] The present invention relates to a laser induced breakdown spectroscopy apparatus and a highly sensitive handpiece,

The present invention relates to a laser induced discharge spectroscopy apparatus, and more particularly, to a laser induced discharge spectroscopy apparatus including a handpiece that efficiently irradiates the skin and collects light emitted from the skin.

Laser Induced Breakdown Spectroscopy (LIBS) is a technique for analyzing an atomic emission spectroscopy of a substance to be irradiated by irradiating a laser beam onto a substance to be irradiated. Generally, a pulsed laser having a pulse duration of several fs to ns is condensed by a lens and irradiated to the target surface at the target surface. When the energy density at the target surface becomes 1 GW / cm 2 or more, a very small amount of the target surface is ablated and plasmaized. At this time, the electron emission spectrum of the emitted atoms is measured by a spectrometer. Since specific elements generate light of a specific wavelength, LIBS can grasp elemental components in real time. When the laser beam is directly applied to a bio sample or human skin, the energy density of the irradiated laser should be minimized in order to reduce the thermal damage of unnecessary biological tissue. Therefore, there is a need for a technique for efficiently collecting light emitted from a laser-induced plasma.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laser induced discharge spectroscopy with improved light collecting capability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a handpiece having improved light collection capability for laser induced discharge spectroscopy.

Disclosure of Invention Technical Problem [8] The present invention provides a laser induced discharge spectroscopy which can be used in a conventional laser skin treatment apparatus.

A laser induced discharge spectroscopy apparatus according to an embodiment of the present invention includes a pulse laser light source for outputting a pulsed laser beam; A handpiece which receives the pulsed laser beam and irradiates the pulsed laser beam on the object to be processed, and collects the generated radiation of the plasma; An optical fiber for transmitting the radiation light collected from the handpiece; A spectroscope for receiving a radiated light from the optical fiber and measuring a radiation spectrum according to a wavelength; And a processor for analyzing the radiation spectrum. The handpiece includes a handpiece body portion having an elliptical cavity therein; And a light collector disposed at a first focus of the elliptical cavity to collect the reflected radiation reflected from the elliptical cavity. The handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity, and the second focus of the elliptical cavity is disposed on the article to be treated.

According to an embodiment of the present invention, the handpiece body may include a light inlet connected to the elliptical cavity and through which the pulsed laser beam passes, and a light outlet through which the radiant light collected by the light collector is transmitted to the outside .

In one embodiment of the present invention, the cut surface may provide a plane in contact with the object to be processed.

In one embodiment of the present invention, the light inlet may be disposed obliquely with respect to the central axis of the elliptical cavity.

In one embodiment of the present invention, the light outlet may be disposed on the central axis of the elliptical cavity.

In one embodiment of the present invention, the cut surface may be cut so as to pass through the second focal point.

In one embodiment of the present invention, the angle between the light inlet and the central axis of the elliptical cavity may be between 5 and 45 degrees.

In one embodiment of the present invention, the light collecting portion includes a hemispherical lens having a spherical surface disposed at a first focal point of the elliptical cavity while looking at the second focal point; And a tapered optical fiber optic plate disposed in contact with the plane of the hemispherical lens.

In one embodiment of the present invention, one end of the tapered optical fiber optical plate is disposed in contact with a plane of the hemispherical lens, and the other end of the tapered optical fiber optical plate is disposed at the light outlet of the handpiece body.

According to an embodiment of the present invention, a focusing lens having a plane-convex structure may be further provided, which connects the other end of the tapered optical fiber plate and the optical fiber.

In one embodiment of the present invention, the handpiece body is in the form of a cylinder, the light inlet and the light outlet are disposed on the upper surface of the cylinder, and the cut surface is disposed on the lower surface of the cylinder.

In one embodiment of the present invention, the surface of the elliptical cavity may be coated with a metal.

In one embodiment of the present invention, the handpiece body portion includes a first body portion and a second body portion, and the first body portion may be made of a metal material or the elliptical surface of the elliptical cavity may be coated with a metal. The second body portion may have a surface cut perpendicularly to the center line at a first focus of the elliptical cavity, and may be formed of a transparent material.

A laser handpiece according to an embodiment of the present invention receives a laser beam from a laser light source and irradiates the laser beam to the object to collect the signal light generated from the object. The handpiece includes a handpiece body portion having an elliptical cavity therein; And a light collector disposed at a first focus of the elliptical cavity to collect the signal light reflected from the elliptical cavity. The handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity, and the second focus of the elliptical cavity is disposed on the article to be treated.

According to an embodiment of the present invention, the handpiece body may include a light inlet connected to the elliptical cavity and through which the pulsed laser beam passes, and a light outlet through which the radiant light collected by the light collector is transmitted to the outside . The cut surface may provide a plane in contact with the object to be processed. A spherical lens having a spherical surface disposed at a first focal point of the elliptical cavity while looking at the second focal point; And a tapered optical fiber optic plate disposed in contact with the plane of the hemispherical lens.

A laser induced discharge spectroscopy apparatus according to an embodiment of the present invention includes a handpiece for receiving a pulsed laser beam from a pulsed laser source and collecting radiated radiation of a plasma generated by irradiating the pulsed laser beam onto an object to be processed; An optical fiber for transmitting the radiation light collected from the handpiece; A spectroscope for receiving a radiated light from the optical fiber and measuring a radiation spectrum according to a wavelength; And a processor for analyzing the radiation spectrum. The handpiece includes a handpiece body portion having an elliptical cavity therein; And a light collector disposed at a first focus of the elliptical cavity to collect the reflected radiation reflected from the elliptical cavity. The handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity, and the second focus of the elliptical cavity is disposed on the article to be treated.

In one embodiment of the present invention, the handpiece further includes a parallel optical lens for converging the light that has been focused through the focusing lens into parallel light, and an auxiliary focusing lens for focusing the parallel light passing through the parallel optical lens can do.

According to one embodiment of the present invention, a handpiece with an elliptical cavity enhances light collection capability, minimizes the loss of a target specimen with less laser power, and provides stable, reproducible laser induced discharge spectroscopy .

According to an embodiment of the present invention, the laser induced discharge spectroscopy apparatus may be attached to a conventional laser skin treatment apparatus to perform laser induced discharge spectroscopy.

1 is a conceptual diagram illustrating a laser induced discharge spectroscopy apparatus according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a handpiece of the laser induced discharge spectroscopy apparatus of FIG.
3 is a conceptual diagram illustrating a laser induced discharge spectroscopy apparatus according to an embodiment of the present invention.
4 is a conceptual diagram illustrating a laser induced discharge spectroscopy apparatus according to another embodiment of the present invention.

Generally, a plasma generated by a laser focused by a focusing lens is generated when a minute crater is generated in the traveling direction of the laser. Therefore, the radiation emitted from the plasma or plasma is not perfectly radial, but has a high optical density in the laser advancing direction. For this reason, the plasma radiation is collected by the focusing lens in the same path as the incident path irradiated with the laser on the workpiece, and the plasma radiation is transmitted to the optical fiber by using a beam splitter such as a dichroic mirror.

However, in this conventional technique, loss of plasma radiation light can not be avoided in an area not covered by the focusing lens, and a method of recovering the lost light to the maximum is required in order to increase the sensitivity of the spectroscopic signal.

According to one embodiment of the present invention, in the elliptical cavity composed of the reflective surface, when the light collecting portion is disposed at the first focus and the object to be processed is disposed at the second focus, The object to be processed generates plasma radiated light. In this case, the plasma radiation is collected at the first focus through reflection, and the light collecting unit disposed at the first focus can collect plasma radiation efficiently to increase the signal sensitivity.

In particular, such a structure can increase the efficiency of light collection and the elliptical reflector tilts with respect to the incident beam. Thus, the optical path of the laser incident beam is separated from the optical path of the plasma radiated light. By the separation of the optical path, the LIBS signal can be extracted by replacing all or part of the handpiece of the conventional skin-beauty laser or adding the handpiece according to the present invention to the handpiece of the existing skin-beauty laser . Therefore, the handpiece according to an embodiment of the present invention can be attached to a conventional skin-beauty laser device and can inspect the condition of the skin by extracting the LIBS signal at the same time or at the same time as the skin-beauty treatment at an inexpensive price.

Increasing the efficiency of light collection by using this handpiece can reduce the energy of the light source (laser), and in particular, in the case of the pulsed laser, unnecessary thermal damage (thermal damage) to the skin can be minimized by reducing energy, Shot-to-shot variation of the laser is reduced and a uniform spectral signal can be obtained.

This handpiece can maximize reflected light, scattered light, and fluorescent light generated simultaneously with not only plasma light (LIBS signal) generated from the skin mounted on the beauty laser, but also physically generated, and can be transmitted to a light analysis module such as a spectroscope.

In addition, the present hand piece can be applied to a light source having a continuous spectrum such as white light. In this case, white light reflected on the skin can be maximized and extracted. In addition, it can be applied not only to pulse lasers including Nd: YAG lasers but also to various CW (conical wave) lasers including a UV region, a visible light region and an IR region. In this case, Raman scattering by skin tissues and molecules, fluorescence light excitation generated by specific molecules can be maximized and focused and transmitted to the optical analysis module. Also in this case, by increasing the light condensing efficiency, the energy of the light source of white light or continuous light can be reduced, and an additional expensive and complicated optical fiber structure for increasing the light condensing efficiency can be minimized.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following examples and results are provided so that the disclosure of the present invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Also, for convenience of explanation, the components may be exaggerated or reduced in size.

1 is a conceptual diagram illustrating a laser induced discharge spectroscopy apparatus according to an embodiment of the present invention.

2 is a cross-sectional view illustrating a handpiece of the laser induced discharge spectroscopy apparatus of FIG.

1 and 2, a laser induced discharge spectroscopy apparatus 100 includes a pulsed laser light source 110, a handpiece 120, an optical fiber 126, a spectroscope 136, and a processing unit 138 . The pulsed laser light source 110 outputs a pulsed laser beam. The handpiece 120 receives the pulse laser beam and irradiates the object 10 with the pulsed laser beam to collect the radiation of the generated plasma. The optical fiber 126 transmits the collected light from the handpiece 120. The spectroscope 136 receives the radiated light from the optical fiber 126 and measures a radiation spectrum according to the wavelength. The processing unit 128 analyzes the radiation spectrum. The handpiece 120 includes a handpiece body 122 having an elliptical cavity 123 therein; And a light collection unit (124) disposed at a first focus (F1) of the elliptical cavity to collect the reflected radiation reflected from the elliptical cavity. The handpiece body 122 has a cut surface that is not perpendicular to the central axis (or long axis) of the elliptic cavity 123 and the second focus F2 of the elliptical cavity 123 has a cut surface Is disposed in the water (10).

The pulsed laser light source 110 may output a pulsed laser. The pulsed laser light source 110 may be a CO2 laser, an Nd: YAG laser, an excimer laser, or an argon laser. The pulse width of the pulse laser light source 110 may have a pulse duration of several fs to ns, and the output of the pulsed laser light source may be 1 GW / cm2 or more. The pulse laser control unit 112 controls the pulse laser light source 110 and may generate a pulse signal and provide it to the spectroscope 136 when an optical output is generated.

The transmission optical system 140 may transmit the output light of the pulse laser light source 110 to the handpiece 120. The transmission optical system 140 may include a plurality of arms that are connected by a fiber optic cable or by a rotatable joint. The pulsed laser beam transmitted through the transmission optical system may be a parallel beam. In this case, the focusing lens 121 may focus the light to the second focus F2 of the elliptic cavity 123. [

The handpiece 120 may irradiate the object to be processed with the pulse laser beam transmitted through the transmission optical system. The user can grasp the handpiece 120 by hand and irradiate a laser beam to a desired position. The object 10 may be the skin of the human body. The handpiece 120 includes an elliptical cavity 123 therein. The inner surface or ellipsoidal surface of the elliptic cavity may be coated with a metal material to reflect plasma radiation. The elliptical cavity 123 has a first focus F1 and a second focus F2. The eccentricity of the elliptical cavity 123 may be 0.5 to 0.9. The plasma radar generated radially at the first focus converges to the second focus. The handpiece 120 may have a cylindrical shape. The central axis of the cylinder may be arranged to be inclined obliquely in the central axis direction of the elliptic cavity. When the point at which the laser induced plasma is generated is the second focus, the light of all the paths reflected by the elliptical cavity is condensed at the first focus. When the light collecting part 124 is disposed at the first focal point, the plasma radiant light can be efficiently collected. Accordingly, more light amount than the existing technique can be transmitted to the spectroscope, and the spectroscopic signal sensitivity can be increased.

The handpiece body 122 includes a light inlet 123a connected to the elliptical cavity 123 and through which the pulsed laser beam passes, and a light source 122 for transmitting radiant light collected by the light collector 124 to the outside And a light outlet 123c. The cut surface provides a plane in contact with the object 10 to be processed, and the cut surface can substantially undergo a second focus.

The light inlet 123a may be disposed obliquely with respect to the central axis (or major axis) of the elliptic cavity 123. [ Specifically, when the handpiece body has a cylindrical shape, the light inlet 123a is disposed on the upper surface of the cylinder, the cut surface is the lower surface of the cylinder, and the light outlet 123c is formed on the upper Plane. The light outlet 123c may be disposed to pass through the center axis of the elliptical cavity.

The angle between the straight line passing through the light inlet and the central axis of the elliptical cavity may be between 5 and 45 degrees. The cut surface may be perpendicular to a straight line passing through the light entrance.

Radial light is gathered around the first focal point. There is a need for an optical system to efficiently transfer collected light to a fiber of limited numerical aperture (NA) value without loss.

Specifically, the light collecting unit 124 may include a hemispherical lens and a tapered optical fiber optic plate. The hemispherical lens 124a may be disposed at the first focus of the elliptical cavity 123 while the spherical surface is looking at the second focus. The tapered optical fiber optic plate 124b is disposed in contact with the plane of the hemispherical lens 124a.

 Light converging at the first focus is refracted through the hemispherical lens 124a and the angle of incidence of the light incident on the tapered optical fiber plate 124b is narrowed. The tapered optical fiber optical plate 124b may have a tensile to several hundreds of optical fiber bundles compressed and tapered. Accordingly, the tapered optical fiber optical plate can receive light through one end having a large diameter, and can transmit light through the other end having a small diameter without any additional optical loss and distortion.

One end of the tapered optical fiber optical plate 124b is disposed in contact with the plane of the hemispherical lens and the other end of the tapered optical fiber optical plate is disposed in the light outlet 123c of the handpiece body.

The light transmitted through the other end of the tapered optical fiber optical plate 124b may be transmitted to the optical fiber 126 through the focusing lens 127. The focusing lens 127 may have a plane-convex structure, and a plane may be arranged to face the optical fiber. Thus, the radiation beam travels along the optical fiber without loss.

The optical fiber 126 may provide an optical path for transmitting the radiated light to the spectroscope 136. The optical fiber 126 may be a single mode optical fiber or a multimode optical fiber.

The beam splitter 132 may be connected to the optical fiber 132, branched, and provided to the spectroscope and the trigger signal generator. The beam splitter may be a beam splitter of a prism structure or a beam splitter using an optical fiber. The beam splitting ratio of the beam splitter may be a 10: 1 level.

The trigger signal generator 134 includes a photodiode and can generate a trigger signal, which is an electrical signal, according to incident light. The trigger signal may be provided to the spectroscope 136 to set the operation time of the optical device of the spectroscope.

The spectroscope 136 can analyze the spectrum of the incident radiation and convert it into a spectroscopic signal that is an electrical signal. The spectroscope includes a one-dimensional optical sensor array. The optical sensor array receives a synchronizing signal of the laser control unit 112 or a trigger signal of the trigger signal generating unit 134 and synchronously operates with a predetermined time delay. can do.

The processing unit 138 receives the spectroscopic signal of the spectroscope and analyzes the fluorescence or electron emission spectrum through a predetermined algorithm to grasp the elemental information and the chemical structure information of the tissue to determine the state of skin or skin cancer Can be calculated. The processing unit may process the wired or wireless network by receiving the spectroscopic signal and analyze the state of the skin.

3 is a conceptual diagram illustrating a laser induced discharge spectroscopy apparatus according to an embodiment of the present invention. A description overlapping with those described in Figs. 1 and 2 will be omitted.

3, the laser induced discharge spectroscopy apparatus 200 includes a pulsed laser light source 110, a handpiece 220, an optical fiber 126, a spectroscope 136, and a processing unit 138. The pulsed laser light source 110 outputs a pulsed laser beam. The handpiece 220 receives the pulsed laser beam and irradiates the pulsed laser beam on the object to be processed, and collects the radiated light of the generated plasma. The optical fiber 126 transmits the radiated light collected from the handpiece. The spectroscope 136 receives the radiated light from the optical fiber and measures a radiated spectrum according to the wavelength. The processing unit 138 analyzes the radiation spectrum. The handpiece includes a handpiece body portion 222 having an elliptical cavity therein; And a light collection unit (124) disposed at a first focus of the elliptical cavity to collect the reflected radiation reflected from the elliptical cavity. The handpiece body 220 has a cut surface that is not perpendicular to the central axis of the elliptical cavity 123 and the second focus of the elliptical cavity is disposed in the article to be treated.

The pulsed laser light source 110 can perform treatments such as normal skin beauty and tissue regeneration, and it is necessary to visually confirm points, nevi, and stains formed on the skin. Accordingly, the handpiece 220 may require a transparent optical window in the visible light region to accurately determine the position at which the incident beam is to be irradiated. To this end, the handpiece body 222 may include a transparent portion.

The handpiece body 222 may include a first body portion 222a and a second body portion 222b. The first body portion 222a may be formed of a metal or may be coated with an elliptical cavity. The cut surface of the elliptical cavity is disposed on the lower surface of the cylinder, and the light outlet 123c is disposed on the upper surface of the cylindrical body, And can be disposed on the upper surface of the cylinder.

The ellipsoidal cavity of the first body part 222a is coated with a metal to reflect the plasma radiated light to a first focus.

The second body part 222b may have a surface cut perpendicularly to the center line at a first focal point F1 of the elliptic cavity 123 and may be formed of a transparent material. Accordingly, the doctor or the user can check the correct position while visually observing the point, etc., and irradiate the laser beam.

4 is a conceptual diagram illustrating a laser induced discharge spectroscopy apparatus according to another embodiment of the present invention. Description of duplicate description to those described in Figs. 1 to 3 will be omitted.

Referring to FIG. 4, the laser induced discharge spectroscopy apparatus 300 includes a handpiece 320 for receiving a pulsed laser beam from a pulsed laser source and for collecting radiated pulses of the generated plasma by irradiating the pulsed laser beam to the processed object ); An optical fiber (126) for transmitting the radiated light collected from the handpiece; A spectroscope 136 for receiving a radiated light from the optical fiber and measuring a radiation spectrum according to the wavelength; And a processing unit 138 for analyzing the radiation spectrum. The handpiece 320 includes a handpiece body 122 having an elliptical cavity therein; And a light collection unit (124) disposed at a first focus of the elliptical cavity to collect the reflected radiation reflected from the elliptical cavity. The handpiece body 122 has a cut surface that is not perpendicular to the central axis of the elliptical cavity. The second focus of the elliptical cavity is disposed in the article to be treated (10).

 The laser induced discharge spectroscopy apparatus according to an embodiment of the present invention can be performed using a conventional laser skin treatment apparatus 101. [ Specifically, the conventional laser skin treatment apparatus 101 may include a pulse laser light source 110, a pulse laser control unit 112, a delivery optical system 140, and a skin treatment handpiece 150.

According to one embodiment of the present invention, the new handpiece 320 may be attached to the skin treatment handpiece 150 of a conventional laser skin treatment device. The skin treatment handpiece 150 focuses the laser beam on the focus through the focusing lens.

The LIBS handpiece 320 according to the present invention is continuously coupled to the conventional handpiece for skin treatment 150 and has a parallel optical lens 321a and a parallel optical lens 321a, And an auxiliary focusing lens 321b that focuses the parallel light that has passed through it. Accordingly, the auxiliary focusing lens 321b can focus the laser beam at the second focus F2 of the elliptical cavity 123. [

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And all of the various forms of embodiments that can be practiced without departing from the spirit of the invention.

110: Pulsed laser light source
112: laser control section
120: Handpiece
122: Handpiece body part
124:
126: Optical fiber
136: spectroscope
138:

Claims (17)

A pulse laser light source for outputting a pulsed laser beam;
A handpiece which receives the pulsed laser beam and irradiates the pulsed laser beam on the object to be processed, and collects the generated radiation of the plasma;
An optical fiber for transmitting the radiation light collected from the handpiece;
A spectroscope for receiving a radiated light from the optical fiber and measuring a radiation spectrum according to a wavelength; And
And a processor for analyzing the radiation spectrum,
The handpiece comprises:
A handpiece body portion having an elliptical cavity inside; And
And a light collecting portion disposed at a first focus of the elliptical cavity to collect the reflected light reflected from the elliptical cavity,
Wherein the handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity,
The cut surface passes through a second focus,
The cut surface does not pass the first focus and the second focus at the same time,
Wherein the second focus of the elliptical cavity is disposed in the article to be treated. The method according to claim 1,
Wherein the handpiece body portion includes a light inlet connected to the elliptical cavity and through which the pulsed laser beam passes, and a light outlet communicated to the outside with radiation radiated by the light collecting portion. Spectrocopy device. 3. The method of claim 2,
Wherein the cut surface provides a plane in contact with the object to be processed. 3. The method of claim 2,
Wherein the light entrance is arranged obliquely with respect to the central axis of the elliptical cavity. 3. The method of claim 2,
Wherein the light exit is located at a central axis of the elliptical cavity. 3. The method of claim 2,
And the cut surface is cut so as to pass through the second focal point. 3. The method of claim 2,
Wherein the angle between the light inlet and the central axis of the elliptical cavity is between 5 and 45 degrees. 3. The method of claim 2,
The light collecting unit includes:
A hemispherical lens having a spherical surface disposed at a first focal point of the elliptical cavity while facing the second focal point; And
And a tapered optical fiber optic plate disposed in contact with a plane of the hemispherical lens. 9. The method of claim 8,
Wherein one end of the tapered optical fiber optical plate is disposed in contact with a plane of the hemispherical lens,
And the other end of the tapered optical fiber optical plate is disposed at the light outlet of the handpiece body. 9. The method of claim 8,
Further comprising a focusing lens having a plane-convex structure connecting the other end of the tapered optical fiber optical plate and the optical fiber. 3. The method of claim 2,
The handpiece body portion is in the form of a cylinder,
Wherein the light inlet and the light outlet are disposed on an upper surface of the cylinder,
Wherein the cut surface is disposed on a lower surface of the cylinder. 3. The method of claim 2,
Wherein the surface of the elliptical cavity is coated with a metal. 9. The method of claim 8,
Wherein the handpiece body portion includes a first body portion and a second body portion,
The first body portion may be made of a metal material or an elliptic surface of the elliptic cavity may be coated with a metal,
Wherein the second body portion has a surface cut perpendicularly to a center line connecting the first focus and the second focus at a first focus of the elliptical cavity and is formed of a transparent material. . A laser handpiece for receiving a pulsed laser beam from a pulsed laser source and collecting radiated radiation of a plasma generated by irradiation of the pulsed laser beam in an object to be processed.
The laser handpiece comprises:
A handpiece body portion having an elliptical cavity inside; And
And a light collecting portion disposed at a first focus of the elliptical cavity to collect the reflected light reflected by the elliptical cavity,
Wherein the handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity,
The cut surface passes through a second focus,
The cut surface does not pass the first focus and the second focus at the same time,
Wherein the second focus of the elliptical cavity is disposed in the article to be treated. 15. The method of claim 14,
Wherein the handpiece body portion includes a light inlet connected to the elliptical cavity and through which the pulsed laser beam passes, and a light outlet communicated to the outside of the radiant light collected by the light collecting portion,
The cut surface providing a plane in contact with the object to be processed,
The light collecting unit includes:
A hemispherical lens having a spherical surface disposed at a first focal point of the elliptical cavity while facing the second focal point; And
And a tapered optical fiber optic plate disposed in contact with a plane of the hemispherical lens. A handpiece for receiving a pulsed laser beam from a pulsed laser source and collecting the generated plasma radiated light by irradiating the pulsed laser beam onto the object to be processed;
An optical fiber for transmitting the radiation light collected from the handpiece;
A spectroscope for receiving a radiated light from the optical fiber and measuring a radiation spectrum according to a wavelength; And
And a processor for analyzing the radiation spectrum,
The handpiece comprises:
A handpiece body portion having an elliptical cavity inside; And
And a light collecting portion disposed at a first focus of the elliptical cavity to collect the reflected light reflected from the elliptical cavity,
Wherein the handpiece body has a cut surface that is not perpendicular to the central axis of the elliptical cavity,
The cut surface passes through a second focus,
The cut surface does not pass the first focus and the second focus at the same time,
Wherein the second focus of the elliptical cavity is disposed in the article to be treated. 17. The method of claim 16,
Wherein the handpiece further comprises a parallel optical lens for focusing the parallel light through the collimating lens and for converting the emitted light into parallel light after focusing through the collimating lens, Scorpion device.
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