WO2022227144A1 - 一种用于oct的光纤准直器、制作方法以及oct设备 - Google Patents

一种用于oct的光纤准直器、制作方法以及oct设备 Download PDF

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Publication number
WO2022227144A1
WO2022227144A1 PCT/CN2021/094707 CN2021094707W WO2022227144A1 WO 2022227144 A1 WO2022227144 A1 WO 2022227144A1 CN 2021094707 W CN2021094707 W CN 2021094707W WO 2022227144 A1 WO2022227144 A1 WO 2022227144A1
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Prior art keywords
protection tube
optical fiber
metal protection
optical lens
optical
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PCT/CN2021/094707
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English (en)
French (fr)
Inventor
字德明
耿科
李百灵
高峻
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广州永士达医疗科技有限责任公司
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Publication of WO2022227144A1 publication Critical patent/WO2022227144A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/45Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0062Arrangements for scanning
    • A61B5/0066Optical coherence imaging
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11Anti-reflection coatings
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/32Optical coupling means having lens focusing means positioned between opposed fibre ends
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/32Optical coupling means having lens focusing means positioned between opposed fibre ends
    • G02B6/322Optical coupling means having lens focusing means positioned between opposed fibre ends and having centering means being part of the lens for the self-positioning of the lightguide at the focal point, e.g. holes, wells, indents, nibs
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue

Definitions

  • the invention relates to the technical field of medical devices, in particular to a self-focusing lens for OCT, an optical fiber collimator, a manufacturing method and an OCT device.
  • OCT Optical Coherence Tomography
  • one of the objectives of the present invention is to provide an optical fiber collimator for OCT, which has the characteristics of short overall size, simple assembly process, and less contamination of the optical path.
  • Another object of the present invention is to provide a method for fabricating an optical fiber collimator for OCT.
  • the third object of the present invention is to provide an OCT device.
  • An optical fiber collimator for OCT comprising an optical fiber for transmitting a light beam, and characterized in that it also includes an optical lens for collimating the light beam, one end of the optical lens and one end of the optical fiber are welded together connected so that a fusion part is formed between the optical lens and the optical fiber, the other end of the optical lens has an inclined surface, the inclined surface is provided with a light reflection structure, and the optical lens is opposite to the inclined surface Adjacent sides form light entry/exit surfaces.
  • it also includes a metal protection tube, one end of the metal protection tube forms an open end for connecting the torque cable, and the other end forms a closed end; the optical lens is arranged on the metal protection tube.
  • the inclined surface of the optical lens is located at the closed end of the metal protection tube, the welding part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber passes through the metal protection tube
  • the open end of the protection tube protrudes outward; the metal protection tube is provided with a light-transmitting hole at a position corresponding to the entrance/exit surface of the optical lens.
  • glue is also filled between the inclined surface of the optical lens and the closed end of the metal protection tube, so that the optical lens and the metal protection tube are fixedly connected.
  • the closed end of the metal protection tube forms a hemispherical shape.
  • a through hole communicating with the inner cavity of the metal protection tube is opened on the tube wall adjacent to the open end of the metal protection tube.
  • the tensile force that the welding part can bear is more than 10N
  • the return loss of the welding part is more than 60dB
  • the insertion loss of the welding part is less than 0.2dB.
  • an anti-reflection film is provided on the entrance/exit surface of the self-focusing lens, and the transmittance of the anti-reflection film to incident light is greater than 99%.
  • a method for making an optical fiber collimator for OCT comprising:
  • the step of welding the optical fiber and the optical lens connecting one end of the optical lens and one end of the optical fiber by welding, so that a welding part is formed between the optical lens and the optical fiber; the other end of the optical lens is made with an inclined surface, A light reflection structure is arranged on the inclined surface, and the side surface adjacent to the inclined surface on the optical lens forms an entrance/exit surface;
  • the third purpose of the present invention adopts the following technical scheme to realize:
  • An OCT device comprising an optical fiber collimator for OCT which is one of the objects of the present invention.
  • One end of the optical lens of the present invention is connected with one end of the optical fiber by welding, so that a welding part is formed between the optical lens and the optical fiber.
  • the transmitted light may enter the optical lens from the right end face or enable the light of the optical lens to enter the optical fiber.
  • the other end of the optical lens eg: self-focusing lens, G-Lens
  • has an inclined surface the inclined surface is provided with a light reflection structure, and the side surface of the optical lens adjacent to the inclined surface forms a light entry/exit surface .
  • the light entering/exiting surface of the side of the optical lens; or the light reflected from the entering/exiting surface can be reflected back through the light reflecting structure. into the optical lens and transmitted to the fiber from the other end face.
  • the collimator usually used for OCT probe needs to emit light from the side.
  • this design saves the pigtail and prism, and shortens the length of the collimator.
  • the overall size can be shortened by about 50% to about 5mm; the assembly process is simplified, and the G-Lens only needs to be fixed.
  • the welding method avoids the contamination of the optical path during the assembly process.
  • the reflected light on the surface can be reduced.
  • the present invention also includes a metal protection tube, which protects the optical lens; in addition, the metal protection tube is provided with a light-transmitting hole at the position corresponding to the entrance/exit surface of the optical lens, and the light-transmitting hole enables the light emitted from the side of the collimator. Not blocked by the wall of the metal protective tube.
  • the closed end of the metal protection tube of the present invention forms a hemispherical shape.
  • the hemispherical closed end is used to prevent scratching of other components when the collimator is rotated.
  • the wall of the metal protection tube of the present invention adjacent to the open end is provided with a through hole communicating with the inner cavity of the metal protection tube.
  • the metal protection tube and the torque cable are fixed by glue, and the through hole is used as a glue dispensing hole or a glue overflow hole. Drive the collimator to rotate.
  • one end of the optical lens is connected with one end of the optical fiber by welding, and then the optical lens is arranged in the metal protection tube, and the light-transmitting hole on the metal protection tube faces the light inlet/outlet of the optical lens. Finally, the inclined surface of the optical lens is bonded and fixed with glue to complete the assembly, which greatly simplifies the assembly process.
  • FIG. 1 is a schematic structural diagram of a fiber collimator according to Embodiment 1;
  • FIG. 2 is a schematic structural diagram of another angle of the optical fiber collimator of the first embodiment
  • FIG. 3 is a perspective view of the optical fiber and the optical lens of the first embodiment
  • FIG. 5 is a cross-sectional view of the optical fiber and the optical lens according to the first embodiment
  • connection should be understood in a broad sense, for example, a fixed connection can be made, or an intermediary can be used.
  • the connection between the media can be the internal connection of two elements or the interaction relationship between the two elements.
  • an optical fiber collimator for OCT includes an optical fiber 10 for transmitting a light beam, and an optical lens 20 for collimating the light beam, one end of the optical lens 20 and one end of the optical fiber are welded
  • the other end of the optical lens 20 has an inclined surface 21, and the inclined surface 21 is provided with a light reflection structure 40, and the optical lens 20 is adjacent to the inclined surface 21.
  • the side surfaces form light entry/exit surfaces 22 .
  • the optical lens 20 includes a cylindrical self-focusing lens (G-Lens), and one end of the self-focusing lens forms an inclined surface 21; the light reflection structure 40 is a light reflection film, and the reflectivity of the light reflection film to incident light is greater than 99 %.
  • G-Lens cylindrical self-focusing lens
  • the light reflection structure 40 is a light reflection film, and the reflectivity of the light reflection film to incident light is greater than 99 %.
  • an anti-reflection film 50 is coated on the entrance/exit surface 22 of the self-focusing lens, and the transmittance of the anti-reflection film 50 to incident light is greater than 99%.
  • the axis of the optical fiber 10 is coaxial with the axis of the self-focusing lens.
  • the right end face of the optical fiber and the left end face of the G-Lens are connected together by welding, and the two can withstand a certain degree of tensile force after welding, and the light transmitted in the optical fiber can enter the G-Lens from the right end face or make the G-Lens -The light of the Lens can enter the fiber.
  • the right end of the G-Lens is ground or cut to form a certain angle, and the surface is coated with a light-reflecting film, so that the light beam entering the G-Lens from the end face reaches the right end face, and can emit light from the side of the light-emitting direction shown in Figure 6; or The light reflected from the light-emitting direction can be reflected back into the G-Lens through the light-reflecting film, and transmitted to the optical fiber from the left end face.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the feature of this embodiment is that it further includes a metal protection tube 60.
  • One end of the metal protection tube 60 forms an open end 61 for connecting the torque cable, and the other end of the metal protection tube 60 forms an open end 61 for connecting the torque cable.
  • a closed end 62 is formed; the optical lens 20 is arranged in the metal protection tube 60 , the inclined surface 21 of the optical lens 20 is located at the closed end 62 of the metal protection tube, and the welding part 30 between the optical lens 20 and the optical fiber 10 is arranged in the metal protection tube 60 Inside, the other end of the optical fiber protrudes outward through the open end 61 of the metal protection tube 60 ;
  • the light-transmitting holes 63 prevent the light emitted from the side of the collimator from being blocked by the tube wall of the metal protection tube 60. During assembly, care should be taken to control the relative position of the collimator and the metal tube to ensure a smooth optical path.
  • the light-transmitting hole 63 is a rectangular cut, the length of the cut is slightly larger than the axial length of the G-Lens grinding surface, and the depth of the cut is equal to or slightly less than half of the outer diameter of the metal tube.
  • the closed end 62 of the metal protection tube 60 is formed into a hemispherical shape.
  • the hemispherical closed end 62 is used to prevent scratching of other components when the collimator is rotated.
  • a through hole 64 communicating with the inner cavity of the metal protection tube 60 is formed on the wall of the metal protection tube 60 adjacent to the open end 61 .
  • the diameter of the through hole 64 is equivalent to half of the outer diameter of the metal tube.
  • glue bonding can also be used instead of fusion splicing to fix the optical fiber and the optical lens 20 .
  • Spot parameters of the collimator usually pay attention to the position of the beam waist of the collimator and the size of the beam waist spot to fit the specific usage scenario.
  • the length of the G-Lens is fixed, and the above parameters are controlled by adjusting the distance between the optical fiber light-emitting surface (pigtail) and the G-Lens (lens) in the collimator. By adjusting the length of the G-Lens in the collimator to control, the same parameters can be achieved, eliminating the trouble of repeated adjustment.
  • a method for fabricating an optical fiber collimator for OCT comprising:
  • the steps of welding the optical fiber and the optical lens connect one end of the optical lens and one end of the optical fiber by welding, so that a welding part is formed between the optical lens and the optical fiber; the other end of the optical lens is made with an inclined surface, and the inclined surface is provided with an inclined surface.
  • Light reflection structure, the side adjacent to the inclined surface on the optical lens forms the light entry/exit surface;
  • Metal protection tube installation steps provide a metal protection tube, one end of the metal protection tube forms an open end for connecting the torque cable, and the other end forms a closed end; fill the closed end of the metal protection tube with glue, and set the optical lens on the In the metal protection tube, the inclined surface of the optical lens is located at the closed end of the metal protection tube, the welding part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber protrudes out through the open end of the metal protection tube; Align the light-transmitting hole on the metal protection tube with the light-in/out-light surface of the optical lens, and finally fix the inclined surface of the optical lens with glue.
  • the fourth embodiment discloses an OCT device including the optical fiber collimator for OCT according to the first embodiment or the second embodiment.
  • OCT equipment is based on the principle of weak coherent light interference, and obtains the optical imaging of the two-dimensional or three-dimensional structure of biological tissue by detecting the back-reflection or scattering signals of different tissues to the incident weakly coherent light.
  • the OCT equipment mainly includes an OCT optical scanning probe.
  • the OCT optical scanning probe obtains images by rotating and scanning the internal optical fiber guide wire.
  • the optical fiber guide wire rotates, the axial movement of the probe can perform layer-by-layer scanning, which can obtain more abundant image information.

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Abstract

一种用于OCT的光纤准直器、制作方法以及OCT设备,光纤准直器包括用于传输光束的光纤(10),还包括用于准直光束的光学透镜(20),所述光学透镜(20)的一端与所述光纤(10)的一端通过熔接的方式连接、使得所述光学透镜(20)与所述光纤(10)之间形成熔接部(30),所述光学透镜(20)的另一端具有倾斜面(21),所述倾斜面(21)上设有光反射结构(40),所述光学透镜(20)上与所述倾斜面(21)相邻的侧面形成进/出光面(22)。该用于OCT的光纤准直器、制作方法以及OCT设备具有整体尺寸短、组装工艺简单、光路不易受污染的特点。

Description

一种用于OCT的光纤准直器、制作方法以及OCT设备 技术领域
本发明涉及医疗器械技术领域,具体涉及一种用于OCT的自聚焦透镜、光纤准直器、制作方法以及OCT设备。
背景技术
光学干涉断层成像技术(Optical Coherence Tomography ,OCT)是一种基于弱相干光干涉原理,通过检测不同组织对入射的弱相干光的背向反射或散射信号得到生物组织的二维或三维结构的光学成像技术。
OCT光学扫描探头通过内部光纤导丝旋转扫描得到图像,在光纤导丝旋转的同时探头轴向运动可以进行逐层扫描,能获取更加丰富的图像信息。在OCT光学扫描探头中,常用到准直器。现有技术中的光纤准直器通常由尾纤、透镜、棱镜等多个部件组成,存在整体尺寸较长(目前为10mm以上)、组装工艺复杂、光路易受污染(固定光器件时密封性不能保证,器件端面在组装前后都存在被污染的风险)的问题。
技术问题
为了克服现有技术的不足,本发明的目的之一在于提供一种用于OCT的光纤准直器,它具有整体尺寸短、组装工艺简单、光路不易受污染的特点。
本发明的目的之二在于提供一种用于OCT的光纤准直器的制作方法。
本发明的目的之三在于提供一种OCT设备。
技术解决方案
本发明的目的之一采用如下技术方案实现:
一种用于OCT的光纤准直器,包括用于传输光束的光纤,其特征在于,还包括用于准直光束的光学透镜,所述光学透镜的一端与所述光纤的一端通过熔接的方式连接、使得所述光学透镜与所述光纤之间形成熔接部,所述光学透镜的另一端具有倾斜面,所述倾斜面上设有光反射结构,所述光学透镜上与所述倾斜面相邻的侧面形成进/出光面。
一种可选的实施方式中,还包括金属保护管,所述金属保护管的一端形成用于连接扭矩线缆的敞口端,其另一端形成封闭端;所述光学透镜设置于所述金属保护管内,所述光学透镜的倾斜面位于金属保护管的封闭端,所述光学透镜与所述光纤之间的熔接部设置于所述金属保护管内,所述光纤的另一端穿过所述金属保护管的敞口端向外伸出;所述金属保护管上对应光学透镜的进/出光面的位置开设有透光孔。
一种可选的实施方式中,所述光学透镜的倾斜面与所述金属保护管的封闭端之间还填充有胶水,使得所述光学透镜与所述金属保护管固定连接。
一种可选的实施方式中,所述金属保护管的封闭端形成半球状。
一种可选的实施方式中,所述金属保护管的邻近敞口端的管壁上开设有与金属保护管的内腔连通的通孔。
一种可选的实施方式中,所述熔接部能够承受的拉力为10N以上,熔接部的回损在60dB以上,熔接部的插损在0.2dB以下。
一种可选的实施方式中,所述光学透镜包括圆柱形的自聚焦透镜,所述自聚焦透镜的一端形成所述倾斜面;所述光反射结构为光反射膜,所述光反射膜对入射光的反射率大于99%。
一种可选的实施方式中,所述自聚焦透镜的进/出光面上设置有增透膜,所述增透膜对入射光的透射率大于99%。
一种可选的实施方式中,所述倾斜面与自聚焦透镜的轴线之间呈夹角α,α=30°-60°。
本发明的目的之二采用如下技术方案实现:
一种用于OCT的光纤准直器的制作方法,其特征在于,包括:
光纤与光学透镜熔接步骤:将光学透镜的一端与光纤的一端通过熔接的方式连接、使得所述光学透镜与所述光纤之间形成熔接部;所述光学透镜的另一端制成有倾斜面,在倾斜面上设置有光反射结构,所述光学透镜上与所述倾斜面相邻的侧面形成进/出光面;
金属保护管安装步骤:提供金属保护管,所述金属保护管的一端形成用于连接扭矩线缆的敞口端,其另一端形成封闭端;在金属保护管的封闭端填充胶水,将光学透镜设置于所述金属保护管内,所述光学透镜的倾斜面位于金属保护管的封闭端,所述光学透镜与所述光纤之间的熔接部设置于所述金属保护管内,所述光纤的另一端穿过所述金属保护管的敞口端向外伸出;将金属保护管上的透光孔与光学透镜的进/出光面对齐,最后将光学透镜的倾斜面与胶水粘接固定。
本发明的目的之三采用如下技术方案实现:
一种OCT设备,其包括本发明目的之一的用于OCT的光纤准直器。
有益效果
相比现有技术,本发明的有益效果在于:
1、本发明的光学透镜的一端与光纤的一端通过熔接的方式连接、使得所述光学透镜与所述光纤之间形成熔接部,光纤与光学透镜熔接后能承受一定程度的拉力,同时光纤内传输的光可从右端面进入光学透镜或使光学透镜的光能够进入光纤内。光学透镜(例如:自聚焦透镜,G-Lens)的另一端具有倾斜面,所述倾斜面上设有光反射结构,所述光学透镜上与所述倾斜面相邻的侧面形成进/出光面。使从端面进入光学透镜中的光束到达倾斜面后,通过光反射结构反射后,从光学透镜的侧面的进/出光面;或使从进/出光面反射回来的光能够通过光反射结构反射回到光学透镜中,并从另一端面传输至光纤。通常用于OCT探头的准直器需要侧面出光,相比现有技术中采用尾纤+G-Lens+棱镜的结构,此设计省去了尾纤和棱镜,缩短了准直器长度,相比原来的结构,整体尺寸可缩短约50%,缩短至约5mm;简化了组装工序,只需固定G-Lens。同时熔接的方式避免了光路在组装过程中被污染。另外,通过设计增透膜,能够减少表面的反射光。
2、本发明还包括金属保护管,对光学透镜起到保护作用;另外金属保护管上对应光学透镜的进/出光面的位置开设有透光孔,透光孔使准直器侧面发出的光不会被金属保护管的管壁遮挡。
3、本发明的光学透镜的倾斜面与金属保护管的封闭端之间还填充有胶水,使得光学透镜与金属保护管固定连接。同时,填充胶水可以避免准直器在液体环境中旋转时,空腔扰动液体产生气泡影响光路。
4、本发明的金属保护管的封闭端形成半球状。半球状的封闭端用于防止准直器转动时划伤其它器件。
5、本发明的金属保护管的邻近敞口端的管壁上开设有与金属保护管的内腔连通的通孔。实际应用过程中,当所述金属保护管的敞口端连接扭矩线缆后,金属保护管与扭矩线缆之间通过胶水固定,通孔作为点胶孔或溢胶孔,通过扭矩线缆能够带动准直器旋转。
6、本发明的制作方法将光学透镜的一端与光纤的一端通过熔接的方式连接,然后将光学透镜设置于金属保护管内,将金属保护管上的透光孔与光学透镜的进/出光面对齐,最后将光学透镜的倾斜面与胶水粘接固定,即可完成组装,大大简化了组装工序。
附图说明
图1为实施例一的光纤准直器的结构示意图;
图2为实施例一的光纤准直器的另一角度的结构示意图;
图3为实施例一的光纤与光学透镜的立体图;
图4为实施例一的光纤与光学透镜的另一角度的立体图;
图5为实施例一的光纤与光学透镜的剖示图;
图6为实施例一的光束模拟示意图;
图7为实施例二的光纤准直器的立体图;
图8为实施例二的光纤准直器的剖示图;
图9为实施例二的金属保护管的立体图。
图中:10、光纤;20、光学透镜;21、倾斜面;22、进/出光面;30、熔接部;40、光反射结构;50、增透膜;60、金属保护管;61、敞口端;62、封闭端;63、透光孔;64、通孔;70、胶水。
本发明的最佳实施方式
下面,结合附图以及具体实施方式,对本发明做进一步描述,需要说明的是,在不相冲突的前提下,以下描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例。除特殊说明的之外,本实施例中所采用到的材料及设备均可从市场购得。所述实施例的实例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的,仅用于解释本申请,而不能理解对本申请的限制。
在本申请的描述中,需要理解的是,术语“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或者位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或者暗示所指的装置或者元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。在本申请的描述中,“多个”的含义是两个或两个以上,除非是另有精确具体地规定。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“相连”、“连通”、“连接”应作广义理解,例如,可以使固定连接,也可以是通过中介媒介间相连,可以是两个元件内部的连通或者两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
实施例一:
参照图1-4,一种用于OCT的光纤准直器,包括用于传输光束的光纤10,还包括用于准直光束的光学透镜20,光学透镜20的一端与光纤的一端通过熔接的方式连接、使得光学透镜20与光纤10之间形成熔接部30,光学透镜20的另一端具有倾斜面21,倾斜面21上设有光反射结构40,光学透镜20上与倾斜面21相邻的侧面形成进/出光面22。
具体地,光学透镜20包括圆柱形的自聚焦透镜(G-Lens),自聚焦透镜的一端形成倾斜面21;光反射结构40为光反射膜,光反射膜对入射光的反射率为大于99%。
在本发明较佳的实施例中,自聚焦透镜的进/出光面22上镀有增透膜50,增透膜50对入射光的透射率为大于99%。通过设计增透膜50,能够减少表面的反射光。
在本发明较佳的实施例中,参照图5,倾斜面21与自聚焦透镜的轴线之间呈夹角α,α=30°-60°。通过改变角度大小,可以采集特定方向上散射回来的样品光,考虑实际需求,更优选地,α=40°。
在本发明较佳的实施例中,光纤10的轴线与自聚焦透镜的轴线同轴。
本实施例中,光纤右端面与G-Lens左端面通过熔接的方式连接在一起,两者熔接后能承受一定程度的拉力,同时光纤内传输的光可从右端面进入G-Lens或使G-Lens的光能够进入光纤内。G-Lens右端研磨或切割形成一定角度,并在表面镀有光反射膜,使从端面进入G-Lens中的光束到达右端面后,能从图6中所示的出光方向侧面出光;或使从出光方向反射回来的光能够通过光反射膜反射回到G-Lens中,并从左端面传输至光纤。
实施例二:
参照图7-9,在实施例一的基础上,本实施例的特点是:还包括金属保护管60,金属保护管60的一端形成用于连接扭矩线缆的敞口端61,其另一端形成封闭端62;光学透镜20设置于金属保护管60内,光学透镜20的倾斜面21位于金属保护管的封闭端62,光学透镜20与光纤10之间的熔接部30设置于金属保护管60内,光纤的另一端穿过金属保护管60的敞口端61向外伸出;金属保护管60上对应光学透镜20的进/出光面22的位置开设有透光孔63。透光孔63使准直器侧面发出的光不会被金属保护管60的管壁遮挡,组装时应注意控制准直器与金属管的相对位置,保证光路畅通。优选地,透光孔63为矩形切口,切口长度略大于G-Lens研磨面的轴向长度,切口深度等于或略小于金属管外直径的一半。
金属保护管60的整体为中空的薄壁结构,内径与G-Lens外径相当,壁厚视产品整体尺寸要求而定,通常在0.03-0.5mm之间。金属保护管60总长与G-Lens长度相关,通常比G-Lens长2-5mm,给组装扭矩线缆留出空间。
在本发明较佳的实施例中,光学透镜20的倾斜面21与金属保护管60的封闭端62之间还填充有胶水70,使得光学透镜20与金属保护管60固定连接。同时,填充胶水可以避免准直器在液体环境中旋转时,空腔扰动液体产生气泡影响光路。
在本发明较佳的实施例中,金属保护管60的封闭端62形成半球状。半球状的封闭端62用于防止准直器转动时划伤其它器件。
在本发明较佳的实施例中,金属保护管60的邻近敞口端61的管壁上开设有与金属保护管60的内腔连通的通孔64。具体地,通孔64的孔径与金属管外直径的一半相当。实际应用过程中,当金属保护管60的敞口端61连接扭矩线缆后,金属保护管60与扭矩线缆之间通过胶水固定,通孔64作为点胶孔或溢胶孔,通过扭矩线缆能够带动准直器旋转。
在本发明较佳的实施例中,根据不同的熔接机类型,适当调节熔接参数,应保证熔接部30能够承受的拉力为10N以上。熔接部30的回损应在60dB以上,且越高越好。熔接部30的插损应在0.2dB以下,且越低越好。
在本发明另外一些实施例中,在一些对插回损要求不高的场合也可用胶水粘接的方式来代替熔接固定光纤和光学透镜20。准直器的光斑参数:通常会关注准直器的束腰位置与束腰光斑的大小,用于契合具体使用场景。现有技术中的结构,G-Lens的长度是固定的,通过调节准直器中光纤出光面(尾纤)与G-Lens(透镜)的距离,来控制上述参数,而此发明还可以通过调节准直器中G-Lens的长度来控制,可以达到相同的参数,省去了反复调节的麻烦。
实施例三:
一种用于OCT的光纤准直器的制作方法,包括:
光纤与光学透镜熔接步骤:将光学透镜的一端与光纤的一端通过熔接的方式连接、使得光学透镜与光纤之间形成熔接部;光学透镜的另一端制成有倾斜面,在倾斜面上设置有光反射结构,光学透镜上与倾斜面相邻的侧面形成进/出光面;
金属保护管安装步骤:提供金属保护管,金属保护管的一端形成用于连接扭矩线缆的敞口端,其另一端形成封闭端;在金属保护管的封闭端填充胶水,将光学透镜设置于金属保护管内,光学透镜的倾斜面位于金属保护管的封闭端,光学透镜与光纤之间的熔接部设置于金属保护管内,光纤的另一端穿过金属保护管的敞口端向外伸出;将金属保护管上的透光孔与光学透镜的进/出光面对齐,最后将光学透镜的倾斜面与胶水粘接固定。
实际应用过程中,还包括扭矩线缆组装步骤:金属保护管的敞口端连接扭矩线缆后,金属保护管与扭矩线缆之间通过胶水固定,通孔作为点胶孔或溢胶孔。
实施例四
实施例四公开一种包括上述实施例一或实施例二的用于OCT的光纤准直器的OCT设备。OCT设备为基于弱相干光干涉原理,通过检测不同组织对入射的弱相干光的背向反射或散射信号得到生物组织的二维或三维结构的光学成像。
OCT设备除包括上述的光纤准直器外,主要包括OCT光学扫描探头。OCT光学扫描探头通过内部光纤导丝旋转扫描得到图像,在光纤导丝旋转的同时探头轴向运动可以进行逐层扫描,能获取更加丰富的图像信息。
虽然仅仅已经对本申请的某些部件和实施例进行了图示并且描述,但是在不实际脱离在权利要求书中的范围和精神的情况下,本领域技术人员可以想到许多修改和改变(例如,各个元件的大小、尺寸、结构、形状和比例、安装布置、材料使用、颜色、取向等的变化)。
最后应说明的是:上述实施方式仅为本发明的优选实施例方式,不能以此来限定本发明保护的范围,本领域的技术人员在本发明的基础上所做的任何非实质性的变化及替换均属于本发明所要求保护的范围。

Claims (10)

  1. 一种用于OCT的光纤准直器,包括用于传输光束的光纤,其特征在于,还包括用于准直光束的光学透镜,所述光学透镜的一端与所述光纤的一端通过熔接的方式连接、使得所述光学透镜与所述光纤之间形成熔接部,所述光学透镜的另一端具有倾斜面,所述倾斜面上设有光反射结构,所述光学透镜上与所述倾斜面相邻的侧面形成进/出光面。
  2. 根据权利要求1所述的用于OCT的光纤准直器,其特征在于,还包括金属保护管,所述金属保护管的一端形成用于连接扭矩线缆的敞口端,其另一端形成封闭端;所述光学透镜设置于所述金属保护管内,所述光学透镜的倾斜面位于金属保护管的封闭端,所述光学透镜与所述光纤之间的熔接部设置于所述金属保护管内,所述光纤的另一端穿过所述金属保护管的敞口端向外伸出;所述金属保护管上对应光学透镜的进/出光面的位置开设有透光孔。
  3. 根据权利要求2所述的用于OCT的光纤准直器,其特征在于,所述光学透镜的倾斜面与所述金属保护管的封闭端之间还填充有胶水,使得所述光学透镜与所述金属保护管固定连接。
  4. 根据权利要求2所述的用于OCT的光纤准直器,其特征在于,所述金属保护管的封闭端形成半球状;
    或/和,
    所述金属保护管的邻近敞口端的管壁上开设有与金属保护管的内腔连通的通孔。
  5. 根据权利要求1所述的用于OCT的光纤准直器,其特征在于,所述熔接部能够承受的拉力为10N以上,熔接部的回损在60dB以上,熔接部的插损在0.2dB以下。
  6. 根据权利要求1所述的用于OCT的光纤准直器,其特征在于,所述光学透镜包括圆柱形的自聚焦透镜,所述自聚焦透镜的一端形成所述倾斜面;所述光反射结构为光反射膜,所述光反射膜对入射光的反射率大于99%。
  7. 根据权利要求6所述的用于OCT的光纤准直器,其特征在于,所述自聚焦透镜的进/出光面上设置有增透膜,所述增透膜对入射光的透射率大于99%。
  8. 根据权利要求6所述的用于OCT的光纤准直器,其特征在于,所述倾斜面与自聚焦透镜的轴线之间呈夹角α,α=30°-60°。
  9. 一种用于OCT的光纤准直器的制作方法,其特征在于,包括:
    光纤与光学透镜熔接步骤:将光学透镜的一端与光纤的一端通过熔接的方式连接、使得所述光学透镜与所述光纤之间形成熔接部;所述光学透镜的另一端制作形成倾斜面,在倾斜面上设置有光反射结构,所述光学透镜上与所述倾斜面相邻的侧面形成进/出光面;
    金属保护管安装步骤:提供金属保护管,所述金属保护管的一端形成用于连接扭矩线缆的敞口端,其另一端形成封闭端;在金属保护管的封闭端填充胶水,将光学透镜设置于所述金属保护管内,所述光学透镜的倾斜面位于金属保护管的封闭端,所述光学透镜与所述光纤之间的熔接部设置于所述金属保护管内,所述光纤的另一端穿过所述金属保护管的敞口端向外伸出;将金属保护管上的透光孔与光学透镜的进/出光面对齐,最后将光学透镜的倾斜面与胶水粘接固定。
  10. 一种OCT设备,其特征在于,其包括权利要求1-8任一项所述的用于OCT的光纤准直器。
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