阅读说明：本技术 一种紧凑型多波长激光针刺仪 (Compact multi-wavelength laser acupuncture appearance ) 是由 张小波 于 2020-12-18 设计创作，主要内容包括：本发明提供了一种紧凑型多波长激光针刺仪,通过提供多种整形系统,或对光路元件的具体位置进行了改进,缩短了光束传播路径,从而缩短了光学系统的长度,减小了光学系统的体积,使得整个光源系统紧凑,另一方面光路的缩短也使得光源系统可以集成更多的半导体激光单元,方便医生在临床治疗过程中多个穴位的配伍使用。(The invention provides a compact multi-wavelength laser acupuncture instrument, which shortens a light beam propagation path by providing various shaping systems or improving the specific positions of optical path elements, thereby shortening the length of an optical system, reducing the volume of the optical system and enabling the whole light source system to be compact.)

1. The compact multi-wavelength laser acupuncture instrument is characterized by comprising a plurality of laser arrays, a shaping system, a first lens, a grating, a second lens, an output coupling mirror, a multi-path optical fiber and an optical fiber sucker, wherein the laser arrays are composed of semiconductor laser light sources with different wavelengths; light beams emitted by the semiconductor laser light sources enter the diffraction grating after being collimated by the first lens after passing through the shaping system, the light beams are transmitted backwards through the diffraction grating at different diffraction angles after being diffracted by the grating, the light beams are collimated by the second lens to form a plurality of laser light beams which are parallel to each other and reach the output coupling lens, a part of light rays are reflected by the output coupling lens and then fed back to the light path to reach the corresponding emergent semiconductor light sources, laser oscillation is formed, wavelength locking is achieved, and the other part of light rays penetrate through the output coupling lens and then respectively enter one corresponding optical fiber in the plurality of optical fibers and then enter the corresponding optical fiber sucker.

2. The compact multi-wavelength laser acupuncture instrument of claim 1 wherein the first lens has a focal length F₁The shaping system enables the distance from the laser array to the first lens to be less than F₁。

3. The compact, multi-wavelength laser acupuncture instrument according to claim 2, wherein the shaping system includes a plurality of micro-converging lenses, one micro-converging lens being disposed behind each semiconductor laser light source for converging the light beam emitted from each semiconductor light source.

4. The compact multi-wavelength laser acupuncture instrument according to claim 3, wherein the shaping system includes a plurality of fast-axis and/or slow-axis collimating lenses disposed after each semiconductor laser light source, and a micro-converging lens.

5. The compact multi-wavelength laser acupuncture instrument according to claim 1, wherein the shaping system includes two converging lenses, and a distance between the first converging lens and the second converging lens is a sum of focal lengths of the first converging lens and the second converging lens.

6. The compact multi-wavelength laser acupuncture instrument is characterized by comprising a laser array, a first lens, a grating, a second lens, an output coupling mirror, a multi-path optical fiber and an optical fiber sucker, wherein the laser array is composed of a plurality of semiconductor laser light sources with different wavelengths, the first lens, the grating, the second lens, the output coupling mirror, the multi-path optical fiber and the optical fiber sucker are arranged along the advancing direction of a light path, and the output coupling mirror is part of theA reflective partially transmissive mirror; the light beams emitted by the semiconductor laser light sources are collimated by the first lens and then enter the diffraction grating, the light beams are diffracted by the grating and then transmitted backwards through the diffraction grating at different diffraction angles, the light beams are collimated by the second lens to form a plurality of laser light beams which are parallel to each other and reach the output coupling mirror, a part of light rays are reflected by the output coupling mirror and then fed back to the light path to reach the corresponding emergent semiconductor light sources, laser oscillation is formed, wavelength locking is achieved, and the other part of light rays penetrate through the output coupling mirror and then respectively enter one corresponding optical fiber in the plurality of optical fibers and then enter the corresponding optical fiber sucker; the focal length of the first lens is F₁The distance from the laser array to the first lens is equal to F₁The distance from the first lens to the grating is less than F₁So that the multiple beams of light emitted by the laser array are diffracted at different positions of the grating.

7. The compact multi-wavelength laser acupuncture instrument according to one of claims 1 to 6, wherein the diffraction grating is a planar diffraction grating or a multi-layer dielectric film grating, the diffraction grating being disposed obliquely with respect to an optical axis.

8. The compact multi-wavelength laser acupuncture instrument according to one of claims 1 to 6, wherein the diffraction grating has a grating constant d, and each laser beam satisfies a grating equation after being diffracted,

d(sinθ₁+sinθ₂)＝mλ，

where λ is the wavelength of each laser beam, θ₁The angle of incidence, θ, of the laser beam on the diffraction grating₂M represents a diffraction order, which is a diffraction angle after the laser beam is diffracted.

9. The compact, multi-wavelength laser acupuncture instrument according to one of claims 1 to 6, wherein the first lens has a positive power and the second lens has a negative power; and/or the focal length of the first lens is smaller than that of the second lens.

10. The compact multi-wavelength laser acupuncture instrument according to one of claims 1 to 6, wherein the multi-wavelength laser acupuncture instrument further comprises a plurality of driving circuits and a control circuit, each driving circuit is respectively connected with one semiconductor laser source in the laser array, and the control circuit is connected with the plurality of driving circuits and is used for driving one or more semiconductor laser sources to work.

Technical Field

The invention relates to the field of laser treatment, and particularly belongs to a laser acupuncture instrument.

Background

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. Acupuncture is a treatment method of traditional medicine, which means that different needles are used to stimulate the acupuncture points of the human body by certain manipulations, so as to stimulate the qi and blood of the meridians and regulate the overall functions. Since the discovery of the biostimulation effect of laser, more and more research has been focused on the effective stimulation of acupuncture points by using laser beams instead of needles.

In clinical treatment, 365 main acupuncture points of a human body are located at different subcutaneous depths respectively. According to the statistics of the shallowest needle inserting amount of the acupuncture points of clinical acupuncture, 52 percent of the acupuncture points are 12.5mm under the skin, 38.5 percent of the acupuncture points are 25nm under the skin, and 9.5 percent of the acupuncture points are 37.5mm under the skin. The acupoints on the head and face are generally shallow, the acupoints on the limbs are deeper than those on the head and face, and the acupoints on the abdomen and back are farthest from the skin and require deeper needle insertion. When laser acupuncture is used in clinic, the penetration depth of different wavelengths to human body is different. In the multi-wavelength laser acupuncture apparatus manufactured in the prior art, a plurality of semiconductor laser light sources with different wavelengths are gathered by using a diffraction grating, two ends of the grating pass through each semiconductor laser and an output coupling mirror in a light path, a laser cavity is formed outside each semiconductor laser unit, light beams emitted by each semiconductor laser are collimated by a lens and then pass through the diffraction grating, a part of transmitted light is reflected by the output coupling mirror and fed back to the light path, laser oscillation is formed, so that the wavelength is not locked, and the other part of light is transmitted through the output coupling mirror to be output so as to enter a corresponding path in a multi-path optical fiber and be used for irradiating acupuncture points. Therefore, a plurality of lasers with different wavelengths are integrated in one laser acupuncture instrument, and the requirements of multi-acupuncture point treatment and different acupuncture depths of different acupuncture points are met.

It should be noted that, doctors often select a plurality of acupuncture points to be compatible and acupuncture at the same time in the treatment process to improve the treatment effect, the number of acupuncture points in each treatment process may be 10-50 according to the difference of the state of an illness, age and the like, that is, the number of semiconductor laser light sources in the multi-wavelength laser acupuncture apparatus is 10-50. However, as shown in fig. 1 of the specification, a collimating lens is disposed behind a laser array composed of a plurality of semiconductor laser sources, light beams emitted by the laser array are focused and then incident on a diffraction grating, distances between the collimating lens and the laser array and distances between the collimating lens and the diffraction grating are both lens focal lengths, and when the laser array contains a larger number of light sources with different wavelengths, the laser beams emitted by the collimating lens will cause the volume of the whole optical path system to be too large, which is not favorable for packaging the optical path system of the multi-wavelength laser acupuncture.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a compact multi-wavelength laser acupuncture instrument, and the specific technical scheme is as follows.

A compact multi-wavelength laser acupuncture instrument comprises a plurality of laser arrays, a shaping system, a first lens, a grating, a second lens, an output coupling mirror, a multi-path optical fiber and an optical fiber sucker, wherein the laser arrays are composed of semiconductor laser light sources with different wavelengths; light beams emitted by the semiconductor laser light sources enter the diffraction grating after being collimated by the first lens after passing through the shaping system, the light beams are transmitted backwards through the diffraction grating at different diffraction angles after being diffracted by the grating, the light beams are collimated by the second lens to form a plurality of laser light beams which are parallel to each other and reach the output coupling lens, a part of light rays are reflected by the output coupling lens and then fed back to the light path to reach the corresponding emergent semiconductor light sources, laser oscillation is formed, wavelength locking is achieved, and the other part of light rays penetrate through the output coupling lens and then respectively enter one corresponding optical fiber in the plurality of optical fibers and then enter the corresponding optical fiber sucker.

Preferably, the first lens has a focal length of F₁The shaping system enables the distance from the laser array to the first lens to be less than F₁。

Preferably, the shaping system comprises a plurality of micro-converging lenses, and one micro-converging lens is correspondingly arranged behind each semiconductor laser light source and is used for converging the light beams emitted by each semiconductor light source.

Preferably, the shaping system comprises a plurality of fast-axis and/or slow-axis collimating mirrors arranged such that there is a fast-axis and/or slow-axis collimating mirror and a micro-converging lens after each semiconductor laser light source.

Preferably, the shaping system comprises two converging lenses, and the distance between the first converging lens and the second converging lens is the sum of the focal lengths of the first converging lens and the second converging lens.

A compact multi-wavelength laser acupuncture instrument comprises a laser array, a first lens, a grating, a second lens, an output coupling mirror, a multi-path optical fiber and an optical fiber sucker, wherein the laser array is composed of a plurality of semiconductor laser light sources with different wavelengths; the light beams emitted by a plurality of semiconductor laser light sources are collimated by the first lens and then enter the diffraction grating, the light beams are diffracted by the grating and then transmitted backwards through the diffraction grating at different diffraction angles, the light beams are collimated by the second lens to form a plurality of laser light beams which are parallel to each other and reach the output coupling mirror, and a part of light beams are reflected by the output coupling mirror and then fed back to the light path to reach the corresponding light beamsThe semiconductor light source is emitted to form laser oscillation so as to realize wavelength locking, and the other part of light penetrates through the output coupling mirror and then respectively enters one corresponding optical fiber in the multiple optical fibers and then enters the corresponding optical fiber sucker; the focal length of the first lens is F₁The distance from the laser array to the first lens is equal to F₁The distance from the first lens to the grating is less than F₁So that the multiple beams of light emitted by the laser array are diffracted at different positions of the grating.

Preferably, the diffraction grating is placed obliquely with respect to the optical axis.

Preferably, the diffraction grating is a planar diffraction grating, and the diffraction grating may be a multilayer dielectric film grating.

Wherein the grating constant of the diffraction grating is d, and each laser beam satisfies the grating equation d (sin theta) after being diffracted₁+sinθ₂)＝mλ，

Where λ is the wavelength of each laser beam, θ₁The angle of incidence, θ, of the laser beam on the diffraction grating₂M represents a diffraction order, which is a diffraction angle after the laser beam is diffracted.

The first lens has a positive optical power and the second lens has a negative optical power.

Preferably, the focal length of the first lens is smaller than the focal length of the second lens.

The multi-wavelength laser acupuncture apparatus further comprises a plurality of driving circuits and a control circuit, each driving circuit is respectively connected with one semiconductor laser source in the laser array, and the control circuit is connected with the plurality of driving circuits and used for driving one or more semiconductor laser sources to work.

According to the technical scheme, the invention provides various shaping systems, or the specific positions of optical path elements are improved, and the light beam propagation path is shortened, so that the length of the optical system is shortened, the volume of the optical system is reduced, the whole light source system is compact, and on the other hand, the light path is shortened, so that the light source system can integrate more semiconductor laser units, and a doctor can conveniently use a plurality of acupuncture points in a compatible manner in the clinical treatment process.

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, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a prior art block diagram of a multi-wavelength laser acupuncture apparatus;

FIG. 2 is a structural diagram of a multi-wavelength laser acupuncture apparatus according to a first embodiment of the present invention;

FIG. 3 is a structural diagram of a second embodiment of the multi-wavelength laser acupuncture apparatus provided by the present invention;

FIG. 4 is a structural diagram of a multi-wavelength laser acupuncture apparatus according to a third embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.

Example 1

As shown in FIG. 2, this embodiment shows a compact multi-wavelength laser acupuncture apparatus. The laser array comprises a laser array 1 consisting of a plurality of semiconductor laser light sources with different wavelengths, a shaping system 2, a first lens 3, a grating 4, a second lens 5, an output coupling mirror 6, a multi-path optical fiber 7 and an optical fiber sucker in sequence along the advancing direction of an optical path. Wherein the grating 4 is placed obliquely with respect to the optical axis, e.g. the angle between the grating 4 and the optical axis is 45 °, and the output coupling mirror is a 6 partially reflective partially transmissive mirror. The laser array 1 comprises a plurality of semiconductor laser light sources, and lasers lambda with three different wavelengths are involved₁、λ₂、λ₃It can be used for irradiating acupoints of head, face, limbs, back and abdomen. After being shaped by the shaping system 2, a plurality of semiconductor laser beams are collimated and focused by the first lens 3 respectively to enter the diffraction grating 4, and the grating 4 is a planar diffraction grating, such as a multilayer dielectric film grating. The grating constant of the diffraction grating is d, each laser beam satisfies the grating equation after being diffracted,

d(sinθ₁+sinθ₂)＝mλ，

where λ is the wavelength of each laser beam, θ₁The angle of incidence, θ, of the laser beam on the diffraction grating₂M represents a diffraction order, which is a diffraction angle after the laser beam is diffracted. And selecting proper incidence angles for each laser beam according to the formula, so that the laser beams are separated by different diffraction angles after passing through the grating and are continuously transmitted forwards.

Each light beam penetrates through the diffraction grating 3 at different diffraction angles to be transmitted backwards, and then is collimated by the second lens 4 to form a plurality of laser beams which are parallel to each other and reach the output coupling mirror 5, a part of the plurality of light beams is reflected by the output coupling mirror 5 and then fed back to the light path to reach the corresponding semiconductor light source, and an oscillation cavity is formed between each semiconductor light source and the output coupling mirror, so that the wavelength can stably oscillate in the oscillation cavity, and the wavelength can be locked; the other part of light penetrates through the output coupling mirror and then respectively enters one corresponding optical fiber in the multi-path optical fibers 6 and enters the corresponding optical fiber sucker for irradiating acupuncture points in clinic.

For the shaping system 2, the shaping system comprises a plurality of micro-converging lenses respectively arranged correspondingly behind each semiconductor laser light source and used for converging each semiconductor light beam, and the focal length of the first lens 3 is F₁By previously converging each laser beam, the distance between the laser array and the first lens 3 is made smaller than the focal length F thereof₁Therefore, the laser acupuncture instrument can integrate more laser light sources for acupuncture point compatibility when doctors treat, and the long path of the optical path system is prevented from being excessively increased due to the excessive integrated light sources, the optical path length is shortened, and the optical source system is more compact.

In addition, the shaping system can also comprise a plurality of fast-axis and/or slow-axis collimating lenses and micro-converging lenses, wherein the fast-axis and/or slow-axis collimating lenses and the micro-converging lenses are arranged behind each semiconductor laser light source, so that the fast-axis and slow-axis divergence angle of each laser beam can be corrected in addition to the convergence of the laser beams, the quality of the laser beams is improved, and the laser beams can be conveniently coupled into the optical fibers.

Wherein the first lens 3 has a positive focal power and the second lens 5 has a negative focal power.

In addition, the multi-wavelength laser acupuncture instrument further comprises a plurality of driving circuits, wherein each driving circuit is respectively connected with one semiconductor laser source in the laser array and is used for emitting laser with different wavelengths. The multi-wavelength laser acupuncture apparatus also comprises a control circuit, and the control circuit is connected with the plurality of driving circuits and is used for driving one or more semiconductor lasers to work.

According to the different depths of acupuncture points at different positions of a human body, the three wavelengths of laser in the acupuncture instrument are respectively 600nm-700nm, 800-830nm and 900nm-1000 nm.

In order to couple the plurality of light beams output by the output coupling mirror into the optical fiber more efficiently, the focal length of the first lens is larger than that of the second lens.

Example 2

In this embodiment 2, as shown in fig. 3, the shaping system includes two converging lenses 21 and 22, the distance between the first converging lens 21 and the second converging lens 22 is the sum of the focal lengths of the first converging lens and the second converging lens, and a beam shrinking system is formed by the two converging lenses for compressing the laser beam emitted by the laser array, so as to shorten the optical path length and reduce the volume of the light source system, and at the same time, more semiconductor laser sources can be integrated into the laser array, which is convenient for a doctor to use multiple acupuncture points in a compatible manner during treatment.

Example 3

As shown in fig. 4, a compact multi-wavelength laser acupuncture apparatus. The laser array comprises a laser array 1 consisting of a plurality of semiconductor laser light sources with different wavelengths, a first lens 3, a grating 4, a second lens 5 and an output coupler in sequence along the advancing direction of a light pathA combiner 6, a multi-path optical fiber 7 and an optical fiber sucker. Wherein the first lens 3 has a focal length F₁The distance between the first lens 3 and the laser array 1 is equal to the focal length F₁And the distance between the first lens 3 and the grating 4 is smaller than the focal length F₁And the plurality of light beams reach the grating before focusing, are diffracted at different positions of the grating, the emergent angle after diffraction still conforms to the grating equation, and the proper incident angle is selected, so that the light beams are emitted at different angles after diffraction.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.