CN112156375B - Multi-wavelength laser therapeutic instrument - Google Patents
Multi-wavelength laser therapeutic instrument Download PDFInfo
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- CN112156375B CN112156375B CN202010998347.5A CN202010998347A CN112156375B CN 112156375 B CN112156375 B CN 112156375B CN 202010998347 A CN202010998347 A CN 202010998347A CN 112156375 B CN112156375 B CN 112156375B
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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
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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
- A61B18/22—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 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
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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
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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
- A61B2018/2015—Miscellaneous features
- A61B2018/202—Laser enclosed in a hand-piece
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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
- A61B2018/2035—Beam shaping or redirecting; Optical components therefor
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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
- A61B2018/2065—Multiwave; Wavelength mixing, e.g. using four or more wavelengths
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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
- A61B18/22—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 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
- A61B2018/2205—Characteristics of fibres
- A61B2018/2211—Plurality of fibres
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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
- A61N2005/0664—Details
Abstract
The invention provides a multi-wavelength laser therapeutic instrument, which comprises a semiconductor laser array, a collimation system, a plurality of optical fibers and a plurality of optical fiber needles; the semiconductor laser array comprises a plurality of semiconductor lasers with different emergent light wavelengths, and the semiconductor lasers are arranged along the vertical direction of emergent light; the collimation system comprises a plurality of first fast axis collimation mirrors, a second fast axis collimation mirror and a slow axis collimation mirror; the emergent end of each semiconductor laser is respectively provided with a first fast axis collimating lens, and the laser emitted by the plurality of semiconductor lasers passes through the first fast axis collimating lens, then shares a second fast axis collimating lens to carry out fast axis collimation again, and passes through a slow axis collimating lens to carry out collimation; the multi-path optical fiber is formed by arranging a plurality of optical fibers from top to bottom in a direction perpendicular to the light emergent direction; the plurality of semiconductor lasers respectively correspond to one path of optical fiber and one optical fiber needle head, and emergent light enters one of the plurality of paths of optical fibers and the corresponding optical fiber needle head respectively after being collimated by the collimating system. The multi-wavelength laser therapeutic apparatus has the characteristics of selectable wavelength, small volume, easiness in packaging, high beam quality and the like.
Description
Technical Field
The invention relates to the field of laser therapy, and particularly belongs to a laser therapeutic apparatus.
Background
The history of acupuncture in China is very popular, and people in ancient times begin to use acupuncture to treat diseases as early as thousands of years ago. In the 60's of the 20 th century, after Mester proposed that weak lasers had biostimulation, the biostimulation effect of low intensity lasers was gradually demonstrated. When weak lasers are used for human therapy, the treatment wavelengths used for different conditions are often different; and the combined action of different wavelengths often has incomparable treatment effect of a single laser wave band.
At present, the application of weak laser in clinic includes the following according to the different laser wave bands: (1) For treating ulcerated wound, sterilizing and debriding, 300nm-450nm ultraviolet light or blue light is adopted; (2) The medicine is used for light acupuncture and moxibustion and treating various diseases suitable for acupuncture and moxibustion treatment, such as: the facial paralysis, cardiovascular and cerebrovascular diseases, etc. adopt red light of 600nm-700 nm; (3) The method adopts 800nm-830nm near infrared semiconductor laser in promoting wound healing, promoting nerve repair and the like; (4) Used for treating pain diseases such as herpes zoster, scapulohumeral periarthritis, and arthralgia, and adopts 900-1000nm near infrared semiconductor laser to irradiate focus; (5) 1400nm-1500nm semiconductor laser has strong tissue absorption rate and high cutting efficiency, and heat can be concentrated in the tissue with small volume to rapidly vaporize and decompose the tissue, so that the tissue is suitable for minimally invasive surgery. The conventional laser therapeutic apparatus has single output wavelength and can only be suitable for treating a certain disease, and in clinical application in hospitals, laser therapeutic apparatuses with different wave bands are required to be configured aiming at different diseases.
Patent CN205626738U discloses a semiconductor laser rehabilitation instrument based on a three-wavelength laser, which adopts a beam combining mirror formed by gluing two isosceles right triangular prisms to combine the emergent light of three semiconductor lasers with different wave bands into a beam coupled into an optical fiber, thereby forming an optical fiber output laser with a plurality of wavelength combinations. In the technology, three semiconductor lasers respectively form an optical path in space, and then a beam combining mirror is used for combining the optical paths into a beam which is output by using a single optical fiber, so that the size of a light source system is increased, and more importantly, the requirements on optical path design, beam quality after beam combining and packaging of the beam combining light source system are higher after the beam combining technology is used, so that the beam combining technology faces a plurality of problems to be solved, and a plurality of inconveniences exist in daily use.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a multi-wavelength semiconductor laser therapeutic instrument.
The technical scheme of the invention is summarized as follows:
a multi-wavelength laser therapeutic instrument comprises a semiconductor laser array, a collimation system, a plurality of optical fibers and a plurality of optical fiber needles; the semiconductor laser array comprises a plurality of semiconductor lasers with different emergent light wavelengths, and the semiconductor lasers are arranged along the vertical direction of emergent light; the collimation system comprises a plurality of first fast axis collimation mirrors, a second fast axis collimation mirror and a slow axis collimation mirror; the emergent end of each semiconductor laser is respectively provided with a first fast axis collimating lens, and the laser emitted by the plurality of semiconductor lasers passes through the first fast axis collimating lens, then shares a second fast axis collimating lens to carry out fast axis collimation again, and passes through a slow axis collimating lens to carry out collimation; the multi-path optical fiber is formed by arranging a plurality of optical fibers from top to bottom in a direction perpendicular to the light emergent direction; the plurality of semiconductor lasers respectively correspond to one path of optical fiber and one optical fiber needle head, and emergent light enters one of the plurality of paths of optical fibers and the corresponding optical fiber needle head respectively after being collimated by the collimating system.
The multi-wavelength laser therapeutic instrument comprises a plurality of driving circuits, wherein each driving circuit is respectively connected with the semiconductor lasers with different emergent light wavelengths and is used for emitting laser with different wavelengths.
The multi-wavelength laser therapeutic instrument comprises a control circuit, wherein the control circuit is connected with the plurality of driving circuits and is used for driving one or more semiconductor lasers to work.
The wavelength of the semiconductor laser can be 300nm-450nm, 600nm-700nm, 800-830nm, 900nm-1000nm and 1400nm-1500nm.
The first fast axis collimating lens, the second fast axis collimating lens and the slow axis collimating lens are cylindrical lenses.
The size of a fast axis light emitting area of each laser is 1 mu m, the size of a slow axis light emitting area of each laser is 50 mu m, the distance between the lasers is 1000 mu m, the fast axis divergence angle is smaller than 40 degrees, and the slow axis divergence angle is smaller than 10 degrees.
The focal length of the first fast axis collimating mirror is 360 mu m, the focal length of the second fast axis collimating mirror is 650 mu m, and the focal length of the slow axis collimating mirror is 10mm.
The fast axis divergence angle of the light spot shaped by each semiconductor laser is 9.0mrad, the size of the light spot is 1.67mm, the size of the slow axis is 1.65mm, and the divergence angle is 9.0mrad.
According to the technical scheme, the invention can realize the following technical effects:
(1) The invention is provided with a plurality of semiconductor lasers with different wavelengths, correspondingly provides a plurality of paths of optical fibers, and couples the lasers with different wavelengths into one path of the plurality of paths of optical fibers respectively, thereby obtaining laser beams with different wavelengths at the outlet of each path of optical fiber, and using different wavelengths or wavelength combinations aiming at different diseases during treatment so as to meet the treatment requirements of the diseases.
(2) The invention sets multi-path optical fiber corresponding to a plurality of semiconductor lasers with different wavelengths, each beam of light enters into the corresponding optical fiber, thereby avoiding the combination of a plurality of beams of light entering into the same optical fiber. In the prior art, a plurality of laser beams enter a single optical fiber through various beam combining technologies, a beam combining system needs to meet the requirements of collimation of each light beam, the shape of a combined beam spot, power density distribution, a divergence angle, convenience for coupling into the optical fiber and the like, the requirements on the beam combining system are complex, the difficulty of light path design is greatly increased, the use of light path elements is increased, and higher requirements are provided for the packaging of a light source system. The invention avoids the arrangement of a beam combining system, so that the structure of the light source system is simple and the packaging difficulty is reduced; meanwhile, because each wavelength has the corresponding optical fiber output, single-path output of different wavelengths can be realized, the mutual interference influence of a plurality of wavelength light beams after combination is avoided, and the light beam quality of each wavelength laser is ensured, thereby ensuring the treatment effect.
(3) The invention jointly uses the combination of a set of collimation system and a multi-path optical fiber structure for a plurality of semiconductor lasers, firstly, fast and slow axis collimation is carried out on each laser with different wavelengths, then laser beams enter the multi-path optical fibers, and light beams emitted by each semiconductor laser respectively enter one path of optical fiber correspondingly, thereby realizing the unified shaping and beam splitting output of the multi-path laser. The method avoids the independent use of a set of fast and slow axis collimating lens for each semiconductor laser, thereby not only reducing the system cost, but also greatly reducing the system volume.
(4) The invention provides a specially designed collimation system for a plurality of semiconductor lasers with different wavelengths, shapes the emitted light beam of the semiconductor laser, solves the problem of different divergence degrees of fast and slow axes of the semiconductor laser caused by the waveguide structure of the semiconductor laser, can meet the output of a plurality of light beams, and simultaneously improves the quality of the light beams.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a main light path diagram of a multi-wavelength laser therapeutic apparatus according to the present invention. Wherein 1 is a semiconductor laser, 2 is a first fast axis collimating lens, 3 is a second fast axis collimating lens, 4 is a slow axis collimating lens, and 5 is a multi-path optical fiber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a multi-wavelength laser therapeutic apparatus comprises a semiconductor laser array, a collimation system, a multi-path optical fiber 5 and a plurality of optical fiber needles; the semiconductor laser array comprises a plurality of semiconductor lasers 1 with different emergent light wavelengths, and the semiconductor lasers 1 are arranged along the vertical direction of emergent light; the collimation system comprises a plurality of first fast axis collimation mirrors 2, a second fast axis collimation mirror 3 and a slow axis collimation mirror 4; the emergent end of each semiconductor laser 1 is respectively provided with a first fast axis collimating lens 2, and the laser emitted by a plurality of semiconductor lasers passes through the first fast axis collimating lens 2, then shares a second fast axis collimating lens 3 to carry out fast axis collimation again, and passes through a slow axis collimating lens 4 to carry out collimation; the multi-path optical fiber is formed by arranging a plurality of optical fibers from top to bottom in a direction perpendicular to the light emergent direction; each semiconductor laser 1 corresponds to one path of optical fiber and one optical fiber needle head, and emergent light enters one of the multiple paths of optical fibers and the corresponding optical fiber needle head respectively after being collimated by the collimating system.
The semiconductor laser array comprises 5 semiconductor lasers 1, the wavelength of each laser is different, the fast-axis and slow-axis light emitting parameters are slightly different, the size of a fast-axis light emitting area of each laser is 1 micrometer, the size of a slow-axis light emitting area of each laser is 50 micrometers, the distance between the lasers is 1000 micrometers, the fast-axis divergence angle is smaller than 40 degrees, and the slow-axis divergence angle is smaller than 10 degrees. Respectively carrying out fast axis collimation on each semiconductor laser 1 by using a first fast axis collimating lens 2 with a focal length of 360 mu m, continuously carrying out fast axis compression on light beams of each semiconductor laser 1 by using a fast axis collimating lens 3 with a focal length of 650 mu m in a unified manner, and obtaining a plurality of semiconductor laser beams with a fast axis divergence angle of 9.0mrad and a fast axis direction light spot size of 1.67mm after compression; and (3) using a slow axis collimating mirror 4 with the focal length of 10mm to perform slow axis collimation on each semiconductor laser beam, wherein the size of a slow axis of the collimated light beam is 1.65mm, and the divergence angle is 9.0mrad. The first fast axis collimating lens 2, the second fast axis collimating lens 3 and the slow axis collimating lens 4 are cylindrical lenses. The collimating system designed by the invention can share one collimating system for a plurality of semiconductor beams with different wavelengths, uniformly collimate the fast axis and the slow axis, improve the divergence angle of the beams, change the emergent light spots from an ellipse to a circle, ensure uniform light intensity distribution, further compress each beam in space and facilitate the respective coupling of the emergent light spots into corresponding optical fibers in multiple paths in the next step. Namely, the uniform shaping and beam splitting output of a plurality of semiconductor lasers with different wavelengths are realized.
In addition, the multi-wavelength laser therapeutic apparatus further comprises a plurality of driving circuits, and each driving circuit is respectively connected with the plurality of semiconductor lasers with different emergent light wavelengths and used for emitting laser with different wavelengths. The multi-wavelength laser therapeutic apparatus also comprises a control circuit, wherein the control circuit is connected with the plurality of driving circuits and is used for driving one or more semiconductor lasers to work.
The wavelength of the semiconductor laser can be 300nm-450nm, 600nm-700nm, 800-830nm, 900nm-1000nm and 1400nm-1500nm according to specific treatment requirements.
The invention can realize the following technical effects:
(1) The semiconductor lasers with different wavelengths are arranged and correspondingly provided with a plurality of multi-path optical fibers, the lasers with different wavelengths are respectively coupled into one path of the multi-path optical fibers, so that laser beams with different wavelengths are obtained at the outlet of each path of optical fiber, and different wavelengths or wavelength combinations are used for different symptoms during treatment so as to meet the treatment requirements of the symptoms.
(2) The invention is provided with a plurality of optical fibers corresponding to a plurality of semiconductor lasers with different wavelengths, and each beam of light respectively enters the corresponding optical fiber, thereby avoiding the combination of a plurality of beams of light entering the same optical fiber. In the prior art, a plurality of laser beams enter a single optical fiber through various beam combining technologies, a beam combining system needs to meet the requirements of collimation of each light beam, the shape of a combined beam spot, power density distribution, a divergence angle, convenience for coupling into the optical fiber and the like, the requirements on the beam combining system are complex, the difficulty of light path design is greatly increased, the use of light path elements is increased, and higher requirements are provided for the packaging of a light source system. The invention avoids the arrangement of a beam combining system, so that the structure of the light source system is simple and the packaging difficulty is reduced; meanwhile, because each wavelength has the corresponding optical fiber output, single-path output of different wavelengths can be realized, the mutual interference influence of a plurality of wavelength light beams after combination is avoided, and the light beam quality of each wavelength laser is ensured, thereby ensuring the treatment effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A multi-wavelength laser therapeutic instrument comprises a semiconductor laser array, a collimation system, a plurality of optical fibers and a plurality of optical fiber needle heads; the semiconductor laser array comprises a plurality of semiconductor lasers with different emergent light wavelengths, and the plurality of semiconductor lasers are arranged along the vertical direction of emergent light;
the collimating system comprises a plurality of first fast-axis collimating mirrors, a second fast-axis collimating mirror and a slow-axis collimating mirror; the emergent end of each semiconductor laser is respectively provided with a first fast axis collimating lens, and the laser emitted by the plurality of semiconductor lasers passes through the first fast axis collimating lens, then shares a second fast axis collimating lens to carry out fast axis collimation again, and passes through a slow axis collimating lens to carry out collimation;
the multi-path optical fiber is formed by arranging a plurality of optical fibers from top to bottom in a direction perpendicular to the light emergent direction;
the plurality of semiconductor lasers respectively correspond to one path of optical fiber and one optical fiber needle head, and emergent light enters one of the plurality of paths of optical fibers and the corresponding optical fiber needle head respectively after being collimated by the collimating system;
the first fast axis collimating lens, the second fast axis collimating lens and the slow axis collimating lens are cylindrical lenses;
the size of a fast axis light emitting area of each laser is 1 mu m, the size of a slow axis light emitting area of each laser is 50 mu m, the divergence angle of the fast axis is less than 40 degrees, the divergence angle of the slow axis is less than 10 degrees, and the distance between the lasers is 1000 mu m;
the focal length of the first fast axis collimating mirror is 360 mu m, the focal length of the second fast axis collimating mirror is 650 mu m, and the focal length of the slow axis collimating mirror is 10mm.
2. A multiple wavelength laser treatment apparatus according to claim 1, including a plurality of driver circuits, each driver circuit being connected to a respective one of the semiconductor lasers for emitting laser light of a different wavelength.
3. A multiple wavelength laser treatment apparatus according to claim 2, including a control circuit connected to said plurality of driving circuits for driving one or more semiconductor lasers to operate.
4. A multi-wavelength laser therapeutic apparatus according to claim 3, wherein the wavelength of said semiconductor laser is 300nm-450nm, 600nm-700nm, 800-830nm, 900nm-1000nm or 1400nm-1500nm.
5. A multiple wavelength laser treatment device according to claim 4, wherein the shaped semiconductor lasers each have a spot size of 9.0mrad for fast axis divergence, 1.67mm for slow axis divergence, and 9.0mrad for slow axis divergence.
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