WO2019006943A1 - 光束匀化的牙科用导光棒 - Google Patents

光束匀化的牙科用导光棒 Download PDF

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Publication number
WO2019006943A1
WO2019006943A1 PCT/CN2017/109654 CN2017109654W WO2019006943A1 WO 2019006943 A1 WO2019006943 A1 WO 2019006943A1 CN 2017109654 W CN2017109654 W CN 2017109654W WO 2019006943 A1 WO2019006943 A1 WO 2019006943A1
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light
guiding rod
light guide
guide rod
light guiding
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PCT/CN2017/109654
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English (en)
French (fr)
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程根
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沈阳雷卓激光医疗器械有限公司
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Publication of WO2019006943A1 publication Critical patent/WO2019006943A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device

Definitions

  • the present invention relates to the field of dental medical devices, and more particularly to a beam-aligned dental light guide bar.
  • the light coupling between the conventional light source and the light guiding rod is generally a direct way, that is, directly emitting light from the light source. Irradiation to the light incident end face of the light guide bar, but as shown in FIG. 11, the light beam emitted in this manner has a problem that the beam energy is concentrated at the center within the working distance, and there is no solution to the problem in the prior art. And this uneven distribution of light intensity is not conducive to dental treatment operations, affecting the therapeutic effect.
  • a beam homogenizing dental light guide comprising a light guide rod, a light collimating member, a housing and a laser handle, wherein the housing is sleeved on the laser handle and the free end is connected to the light guide rod in the housing a light collimating member is disposed between the light emitting end of the laser handle and the end of the light guiding rod, and the light emitted from the light emitting end of the laser handle is incident into the light guide through the light collimating member
  • the rod end face is densely arranged with a plurality of optical fibers inside the light guiding rod.
  • the light collimating member is a collimating lens.
  • the light collimating member is a parabolic mirror, and the light emitting end of the laser handle is passed through the middle of the parabolic mirror, and the light emitted from the light emitting end is reflected by the concave surface of the parabolic mirror. Injection into the end face of the light guiding rod.
  • the position of the end face of the fiber end of the light guiding end of the light guiding rod and the position of the end face of the fiber of the incident end face are not one-to-one correspondence.
  • the invention solves the problem that the light beam emitted by the light source is collimated into parallel light and then incident on the light guiding rod, so that the uneven distribution of the brightness of the outgoing beam under direct incident can be solved.
  • the brightness distribution of the light beam emitted by the light guiding rod of the invention is uniform, and the dental treatment operation is not affected, and the therapeutic effect is ensured.
  • Figure 1 is a schematic view showing the structure of the present invention
  • FIG. 3 is a schematic view of another embodiment of the present invention.
  • Figure 4 is a graph showing the cause of the non-uniform distribution of light intensity.
  • Figure 5 is a second analysis of the cause of the non-uniform distribution of light intensity.
  • Figure 6 is a third analysis of the cause of non-uniform distribution of light intensity.
  • Figure 7 is a fourth analysis of the cause of the non-uniform distribution of light intensity.
  • Figure 8 is a schematic view of the light spot
  • Figure 9 is a schematic view of a light guiding rod
  • Figure 10 is a schematic view of the end face of the light guiding rod of Figure 9;
  • Figure 11 is a schematic diagram of beam energy accumulation.
  • 1 is a light guide bar
  • 2 is a collimating lens
  • 3 is a housing
  • 4 is a laser handle
  • 5 is a parabolic mirror
  • 6 is incident light
  • 7 is an optical fiber
  • 8 is a refracted light
  • 9 is a reflected light
  • 10 is the outgoing beam
  • 11 is the spot.
  • the present invention includes a light guiding rod 1, a light collimating member, a housing 3, and a laser handle 4, wherein the housing 3 is fitted over the laser handle 4, and the free end is connected to the light guiding rod 1.
  • a light collimating member is disposed between the light emitting end of the laser handle 4 and the end of the light guiding rod 1, and the light collimating member is embedded in the housing 3. The light emitted from the light-emitting end of the laser handle 4 passes through the light collimating member and is incident into the end surface of the light guiding rod 1 in parallel.
  • the light collimating member may be a collimating lens 2, or as shown in FIG. 3, the light collimating member is a parabolic mirror 5, and the light emitting end of the laser handle 4 is provided by The central portion of the parabolic mirror 5 passes through, and the light emitted from the light-emitting end portion is reflected by the concave surface of the parabolic mirror 5 and then incident into the end surface of the light guiding rod 1 in parallel.
  • the light guide bar 1 is internally provided with a large number of optical fibers 7, and the position of the exit end face fiber 7 and the position of the incident end face fiber 7 may be non-one-to-one correspondence, and are randomly distributed.
  • the working principle of the invention is:
  • the light beam emitted by the light guide bar 1 in the prior art has a problem that the beam energy is concentrated at the center within the working distance.
  • the single light can be
  • the root fiber 7 is an elongated straight glass cylinder.
  • a pair of incident light rays 6 having an incident angle of ⁇ ( ⁇ 0) are incident from one end of the glass cylinder, and then enter the glass cylinder.
  • the incident ray 6 is refracted to form a refracted ray 8 having a refraction angle of ⁇ , and the refracted ray 8 is totally reflected on the sidewall of the glass cylinder to form a reflected ray 9, as shown in Fig.
  • the beam It only changes direction, but the shape does not change, but as shown in Figure 6, the refracted light 8 is fine.
  • a certain diameter cannot be regarded as infinitely thin light, so the above-mentioned refracted light 8 has different reflection angles at different points on the circumferential side wall of the glass cylinder, so the reflection does not only change the direction of the beam propagation, but also the refracted light of the beam from the parallel light. 8 becomes a divergent reflected light 9.
  • the structure of the light guiding rod 1 is to densely bond a plurality of optical fibers 7 together, regardless of whether the light source is an LED or a laser, because the light beam has a divergence angle when it is emitted, and the edge is further
  • the phenomenon of concentration is shown in Figure 11.
  • the present invention uses a light collimating member to convert the divergent light emitted from the light emitting end of the laser handle 4 into parallel collimated light, and allows the collimated beam to be incident on the end face of the vertical light guiding rod. This way the outgoing light will have the same beam shape as the incident light.
  • the light guide bar 1 of the prior art is mostly an image-type light guide bar, and a large number of optical fibers 7 are disposed therein, and the position and incidence of the exit end faces of each of the optical fibers 7 are incident.
  • the position of the end face is strictly corresponding, so even if the laser beam is collimated, the light intensity distribution of the beam after passing through the light guiding rod 1 remains the same as the original beam, which is a Gaussian distribution.
  • the position of the light-emitting rod 1 of the present invention and the position of the incident end-face optical fiber 7 may be non-one-to-one correspondence, and are randomly distributed, so that regardless of the distribution of the incident laser energy, after the randomization, the emitted light can be approximately uniform. distributed.
  • the present invention first performs a parallel laser oblique incidence test on a single optical fiber 7, and then performs theoretical reasoning and optical software simulation, and then passes through The actual installation of the light collimation component is verified, and it turns out that the problem of uneven distribution of the emitted beam brightness can be effectively solved.

Abstract

一种光束匀化的牙科用导光棒，包括导光棒（1）、光线准直件、壳体（3）和激光手柄（4），其中壳体（3）套装在激光手柄（4）上，且自由端与导光棒（1）相连，在壳体（3）内，在激光手柄（4）的发光端部与导光棒（1）端部之间设有光线准直件，且激光手柄（4）的发光端部射出的光线经光线准直件后平行射入导光棒（1）端面，导光棒（1）内部密集排布有多根光纤（7），光线准直件可以为一个准直透镜（2）。通过将光源出射的光线准直为平行光后，再入射到导光棒中，解决了直接入射情况下，导光棒出射光束亮度分布不均的问题。

Description

光束匀化的牙科用导光棒 技术领域
本发明涉及牙科医疗器械领域，具体地说是一种光束匀化的牙科用导光棒。
背景技术
在牙科的某些应用中，需要使用导光棒将LED光或激光光束传导到治疗区，传统的光源与导光棒之间的光耦合方式一般为直接方式，即直接将光源发射出的光照射到导光棒的进光端面，但如图11所示，这种方式出射的光束在工作距离内具有光束能量聚集在中心处的问题，而现有技术中还没有针对该问题的解决方案，并且这种光强的不均匀分布现象不利于牙科治疗作业，影响治疗效果。
发明内容
本发明的目的在于提供一种光束匀化的牙科用导光棒，通过将光源出射的光线准直为平行光后，再入射到导光棒中，可以解决直接入射情况下，导光棒出射光束亮度分布不均的问题。
本发明的目的是通过以下技术方案来实现的：
一种光束匀化的牙科用导光棒，包括导光棒、光线准直件、壳体和激光手柄，其中壳体套装在激光手柄上且自由端与导光棒相连，在所述壳体内，在所述激光手柄的发光端部与导光棒端部之间设有光线准直件，且激光手柄的发光端部射出的光线经所述光线准直件后平行射入所述导光棒端面，所述导光棒内部密集排布有多根光纤。
所述光线准直件为一个准直透镜。
所述光线准直件为一个抛物型反光镜，激光手柄的发光端部由所述抛物型反光镜中部穿过，所述发光端部射出的光线经过所述抛物型反光镜的凹面反射后平行射入所述导光棒端面。
所述导光棒出射端面的光纤端面位置和入射端面的光纤端面位置非一一对应。
本发明的优点与积极效果为：
1、本发明通过将光源出射的光线准直为平行光后，再入射到导光棒中，可以解决直接入射情况下，出射光束亮度分布不均的问题。
2、本发明导光棒射出光束亮度分布均匀，不会影响牙科治疗作业，保证治疗效果。
附图说明
图1为本发明的结构示意图，
图2为本发明的一个实施例示意图，
图3为本发明的另一个实施例示意图，
图4为光强非均匀分布成因分析图一，
图5为光强非均匀分布成因分析图二，
图6为光强非均匀分布成因分析图三，
图7为光强非均匀分布成因分析图四，
图8为光斑示意图，
图9为导光棒示意图，
图10为图9中的导光棒端面示意图，
图11为光束能量聚集示意图。
其中，1为导光棒，2为准直透镜，3为壳体，4为激光手柄，5为抛物型反光镜，6为入射光线，7为光纤，8为折射光线，9为反射光线，10为射出光束，11为光斑。
具体实施方式
下面结合附图对本发明作进一步详述。
如图1～3所示，本发明包括导光棒1、光线准直件、壳体3和激光手柄4，其中壳体3套装在激光手柄4上，且自由端与导光棒1相连，在所述壳体3内，在所述激光手柄4的发光端部与导光棒1端部之间设有光线准直件，且所述光线准直件嵌装于所述壳体3中，激光手柄4的发光端部射出的光线经过所述光线准直件后平行射入所述导光棒1端面。
如图2所示，所述光线准直件可以是一个准直透镜2，或者如图3所示，所述光线准直件为一个抛物型反光镜5，激光手柄4的发光端部由所述抛物型反光镜5中部穿过，所述发光端部射出的光线经过所述抛物型反光镜5的凹面反射后平行射入所述导光棒1端面。
所述导光棒1内部设有数量较多的光纤7，且出射端面光纤7的位置和入射端面光纤7位置可以非一一对应，为随机分布。
本发明的工作原理为：
如图11所示，现有技术中的导光棒1出射的光束在工作距离内具有光束能量聚集在中心处的问题，为说明该问题原因，如图4～8所示，可以先将单根光纤7类比为细长直玻璃圆柱体，如图4所示，从所述玻璃圆柱体的一端入射一束入射角为α(α≠0)平行的入射光线6，进入玻璃圆柱体后，入射光线6折射形成折射角为β的折射光线8，折射光线8会在玻璃圆柱体侧壁上发生全反射，形成反射光线9，如图5所示，如果是发生在平面上的反射，光束只会改变方向，但形体不会发生改变，但如图6所示，折射光线8再细也是具有 一定直径的，不可看做无限细的光线，所以上述折射光线8在玻璃圆柱体圆周侧壁上不同点处反射角不同，所以反射不只会改变光束传播方向，光束也会从平行光的折射光线8变为发散的反射光线9，经过多次全反射后，光束原来的平行状态会被彻底打乱，但其传播角度改变不大，仍然近似为β，这就如图7所示，导致最终从光纤7另一端射出的射出光束10为圆周分布，出射角近似为α，如图8所示，形成圆环状的光斑11。
而如图9～10所示，导光棒1的结构就是将无数根光纤7密集排布粘接在一起的，而无论光源是LED还是激光，由于光束射出时存在发散角，且越向边缘入射角α越大，并且由于光纤7直径非常小，可以将每一个穿透单一光纤7的光束看做是平行光，所以每一根光纤7的出射光斑都为圆环状分布，且入射角α越大，圆环半径越大，最终所有这些光纤对应的圆环型光斑光强叠加后，形成了在牙科导光棒1使用时的工作距离内(通常只有几厘米)，光强在圆心处集中的现象，如图11所示。
如图1～3所示，本发明利用一个光线准直件使激光手柄4的发光端部射出来的发散光变换为平行的准直光，并让该准直光束垂直导光棒端面入射，这样出射光将具有和入射光相同的光束形态。
如图1～3以及图9～10所示，现有技术中的导光棒1多为成像型导光棒，内部设有数量较多的光纤7，且每根光纤7出射端面位置与入射端面位置严格对应，所以即使激光光束经过准直化，穿透导光棒1后的光束光强分布仍然和原光束保持一致，为高斯分布。但本发明的导光棒1出射端面光纤7的位置和入射端面光纤7位置可以非一一对应，为随机分布，这样无论入射激光能量如何分布，经过随机化后，出射光线均可近似为均匀分布。
由于导光棒1内部的光纤7数量很多，很难通过实验等手段分析出上述成因，本发明是先对单一光纤7进行平行激光斜入射试验，然后进行理论推理和光学软件模拟后，再经过实际安装光线准直件进行验证，最终证明确实可以有效解决出射光束亮度分布不均的问题。

Claims (4)

  1. 一种光束匀化的牙科用导光棒，其特征在于：包括导光棒(1)、光线准直件、壳体(3)和激光手柄(4)，其中壳体(3)套装在激光手柄(4)上且自由端与导光棒(1)相连，在所述壳体(3)内，在所述激光手柄(4)的发光端部与导光棒(1)端部之间设有光线准直件，且激光手柄(4)的发光端部射出的光线经所述光线准直件后平行射入所述导光棒(1)端面，所述导光棒(1)内部密集排布有多根光纤(7)。
  2. 根据权利要求1所述的光束匀化的牙科用导光棒，其特征在于：所述光线准直件为一个准直透镜(2)。
  3. 根据权利要求1所述的光束匀化的牙科用导光棒，其特征在于：所述光线准直件为一个抛物型反光镜(5)，激光手柄(4)的发光端部由所述抛物型反光镜(5)中部穿过，所述发光端部射出的光线经过所述抛物型反光镜(5)的凹面反射后平行射入所述导光棒(1)端面。
  4. 根据权利要求1所述的光束匀化的牙科用导光棒，其特征在于：所述导光棒(1)出射端面的光纤(7)端面位置和入射端面的光纤(7)端面位置非一一对应。
PCT/CN2017/109654 2017-07-03 2017-11-07 光束匀化的牙科用导光棒 WO2019006943A1 (zh)

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CN112817117B (zh) * 2020-12-28 2022-10-21 西南技术物理研究所 一种带自准直调节功能的抛物面反射镜辅助装置

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