CN113237850A - Optical fiber collimator for OCT (optical coherence tomography), manufacturing method and OCT equipment - Google Patents
Optical fiber collimator for OCT (optical coherence tomography), manufacturing method and OCT equipment Download PDFInfo
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- CN113237850A CN113237850A CN202110474346.5A CN202110474346A CN113237850A CN 113237850 A CN113237850 A CN 113237850A CN 202110474346 A CN202110474346 A CN 202110474346A CN 113237850 A CN113237850 A CN 113237850A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
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- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- 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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- 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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
- G02B6/322—Optical 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
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- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
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- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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Abstract
The invention discloses an optical fiber collimator for OCT, a manufacturing method and OCT equipment, wherein the optical fiber collimator comprises an optical fiber for transmitting light beams and an optical lens for collimating the light beams, one end of the optical lens is connected with one end of the optical fiber in a fusion welding mode, so that a fusion welding part is formed between the optical lens and the optical fiber, the other end of the optical lens is provided with an inclined surface, a light reflection structure is arranged on the inclined surface, and a light inlet/outlet surface is formed on the side surface of the optical lens adjacent to the inclined surface. The invention has the characteristics of short overall size, simple assembly process and difficult pollution of an optical path.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a self-focusing lens for OCT, an optical fiber collimator, a manufacturing method and OCT equipment.
Background
Optical interference Tomography (OCT) is an Optical imaging technique based on the principle of interference of weak coherent light, which obtains a two-dimensional or three-dimensional structure of biological tissue by detecting back-reflected or scattered signals of different tissues to incident weak coherent light.
The OCT optical scanning probe obtains images through internal optical fiber guide wire rotation scanning, and the probe axial motion can scan layer by layer while the optical fiber guide wire rotates, so that richer image information can be obtained. In OCT optical scanning probes, collimators are commonly used. The optical fiber collimator in the prior art is generally composed of a plurality of components such as a tail fiber, a lens, a prism and the like, and has the problems of long overall size (more than 10mm at present), complex assembly process, easy pollution to an optical path (the sealing performance cannot be ensured when an optical device is fixed, and the risk of pollution to the end face of the device before and after assembly).
Disclosure of Invention
In order to overcome the defects of the prior art, 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 possibility of contaminating the optical path.
The second purpose of the invention is to provide a method for manufacturing an optical fiber collimator for OCT.
It is a further object of the present invention to provide an OCT apparatus.
One of the purposes of the invention is realized by adopting the following technical scheme:
the optical fiber collimator for the OCT comprises an optical fiber for transmitting light beams and is characterized by further comprising an optical lens for collimating the light beams, wherein one end of the optical lens is connected with one end of the optical fiber in a fusion welding mode, so that a fusion welding part is formed between the optical lens and the optical fiber, the other end of the optical lens is provided with an inclined surface, a light reflection structure is arranged on the inclined surface, and a light inlet/outlet surface is formed on the side surface, adjacent to the inclined surface, of the optical lens.
In an alternative embodiment, the torque converter further comprises a metal protection tube, one end of which forms an open end for connecting a torque cable, and the other end of which forms a closed end; the optical lens is arranged in the metal protection tube, the inclined surface of the optical lens is positioned at the closed end of the metal protection tube, the fusion joint part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber penetrates through the open end of the metal protection tube and extends outwards; and the metal protection tube is provided with a light hole corresponding to the light inlet/outlet surface of the optical lens.
In an optional embodiment, glue is further filled between the inclined surface of the optical lens and the closed end of the metal protection tube, so that the optical lens is fixedly connected with the metal protection tube.
In an alternative embodiment, the closed end of the metal protection tube is formed in a hemispherical shape.
In an optional embodiment, a through hole communicated with the inner cavity of the metal protection tube is formed in the tube wall of the metal protection tube adjacent to the open end.
In an alternative embodiment, the tensile force that the fusion-bonded portion can bear is 10N or more, the return loss of the fusion-bonded portion is 60dB or more, and the insertion loss of the fusion-bonded portion is 0.2dB or less.
In an alternative embodiment, the optical lens includes a cylindrical self-focusing lens, one end of which forms the inclined surface; the light reflection structure is a light reflection film, and the reflectivity of the light reflection film to incident light is more than 99%.
In an optional implementation manner, an antireflection film is disposed on the light entrance/exit surface of the self-focusing lens, and the transmittance of the antireflection film to incident light is greater than 99%.
In an alternative embodiment, the inclined surface forms an angle α with the axis of the self-focusing lens, where α is 30 ° to 60 °.
The second purpose of the invention is realized by adopting the following technical scheme:
a method of making a fiber collimator for OCT, comprising:
and (3) fusion welding of the optical fiber and the optical lens: connecting one end of an optical lens and one end of an optical fiber in a fusion welding mode to form a fusion welding part between the optical lens and the optical fiber; the other end of the optical lens is made into an inclined plane, a light reflection structure is arranged on the inclined plane, and a light inlet/outlet surface is formed on the side surface of the optical lens adjacent to the inclined plane;
the metal protection pipe installation step: providing a metal protection pipe, wherein one end of the metal protection pipe forms an open end for connecting a torque cable, and the other end of the metal protection pipe forms a closed end; filling glue into the closed end of the metal protection tube, arranging an optical lens in the metal protection tube, wherein the inclined surface of the optical lens is positioned at the closed end of the metal protection tube, the fusion joint part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber penetrates through the open end of the metal protection tube and extends outwards; aligning the light hole on the metal protection tube with the light inlet/outlet surface of the optical lens, and finally bonding and fixing the inclined surface of the optical lens with glue.
The third purpose of the invention is realized by adopting the following technical scheme:
an OCT apparatus comprising a fiber collimator for OCT which is one of the objects of the present invention.
Compared with the prior art, the invention has the beneficial effects that:
1. one end of the optical lens is connected with one end of the optical fiber in a fusion welding mode, so that a fusion welding part is formed between the optical lens and the optical fiber, the optical fiber and the optical lens can bear certain tensile force after fusion welding, and meanwhile light transmitted in the optical fiber can enter the optical lens from the right end face or the light of the optical lens can enter the optical fiber. The other end of the optical Lens (such as a self-focusing Lens, G-Lens) is provided with an inclined plane, a light reflection structure is arranged on the inclined plane, and a light inlet/outlet surface is formed on the side surface of the optical Lens adjacent to the inclined plane. After the light beam entering the optical lens from the end face reaches the inclined plane and is reflected by the light reflection structure, the light beam enters/exits from the side face of the optical lens; or the light reflected from the light inlet/outlet surface can be reflected back to the optical lens through the light reflection structure and transmitted to the optical fiber from the other end surface. The collimator commonly used for the OCT probe needs to emit light from the side surface, compared with the structure of a tail fiber + G-Lens + prism adopted in the prior art, the design omits the tail fiber and the prism, shortens the length of the collimator, and compared with the original structure, the whole size can be shortened by about 50 percent and is shortened to about 5 mm; the assembly process is simplified, and only G-Lens needs to be fixed. Meanwhile, the welding mode avoids the pollution of the light path in the assembling process. In addition, the reflection light on the surface can be reduced by designing the antireflection film.
2. The invention also comprises a metal protection tube which plays a role in protecting the optical lens; in addition, the metal protection tube is provided with light holes corresponding to the light inlet/outlet surface of the optical lens, and the light holes enable light emitted from the side surface of the collimator not to be shielded by the tube wall of the metal protection tube.
3. Glue is filled between the inclined surface of the optical lens and the closed end of the metal protection tube, so that the optical lens is fixedly connected with the metal protection tube. Meanwhile, the filled glue can prevent the cavity from disturbing liquid to generate bubbles to influence a light path when the collimator rotates in a liquid environment.
4. The closed end of the metal protection tube of the invention is formed into a hemispherical shape. The hemispherical closed end is used for preventing the collimator from scratching other devices when rotating.
5. The pipe wall of the metal protection pipe adjacent to the open end is provided with a through hole communicated with the inner cavity of the metal protection pipe. In the practical application process, when after the torque cable is connected to the open end of metal protection pipe, it is fixed through glue between metal protection pipe and the torque cable, and the through-hole can drive the collimater rotation through the torque cable as point gluey hole or excessive gluey hole.
6. The manufacturing method of the invention connects one end of the optical lens with one end of the optical fiber in a welding mode, then arranges the optical lens in the metal protection tube, aligns the light hole on the metal protection tube with the light inlet/outlet surface of the optical lens, and finally bonds and fixes the inclined surface of the optical lens with the glue, thus completing the assembly and greatly simplifying the assembly process.
Drawings
FIG. 1 is a schematic structural diagram of a fiber collimator according to a first embodiment;
FIG. 2 is a schematic view of another angle structure of the fiber collimator according to the first embodiment;
FIG. 3 is a perspective view of an optical fiber and an optical lens according to a first embodiment;
FIG. 4 is a perspective view of an optical fiber and an optical lens according to another embodiment;
FIG. 5 is a cross-sectional view of an optical fiber and an optical lens according to a first embodiment;
FIG. 6 is a schematic diagram of a light beam simulation according to the first embodiment;
FIG. 7 is a perspective view of a fiber collimator according to a second embodiment;
FIG. 8 is a cross-sectional view of a fiber collimator according to a second embodiment;
fig. 9 is a perspective view of the metal protection tube of the second embodiment.
In the figure: 10. an optical fiber; 20. an optical lens; 21. an inclined surface; 22. a light inlet/outlet surface; 30. a fusion part; 40. a light reflecting structure; 50. an anti-reflection film; 60. a metal protection tube; 61. an open end; 62. a closed end; 63. a light-transmitting hole; 64. a through hole; 70. and (4) glue.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The first embodiment is as follows:
referring to fig. 1 to 4, an optical fiber collimator for OCT includes an optical fiber 10 for transmitting a light beam, and further includes an optical lens 20 for collimating the light beam, one end of the optical lens 20 is connected to one end of the optical fiber by welding, so that a welded portion 30 is formed between the optical lens 20 and the optical fiber 10, the other end of the optical lens 20 has an inclined surface 21, a light reflection structure 40 is disposed on the inclined surface 21, and a light entering/exiting surface 22 is formed on a side surface of the optical lens 20 adjacent to the inclined surface 21.
Specifically, the optical Lens 20 includes a cylindrical self-focusing Lens (G-Lens), one end of which is formed with 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%.
In the preferred embodiment of the present invention, the light incident/emergent surface 22 of the self-focusing lens is coated with the antireflection film 50, and the transmittance of the antireflection film 50 to incident light is greater than 99%. By designing the antireflection film 50, the reflected light from the surface can be reduced.
In a preferred embodiment of the present invention, referring to fig. 5, the inclined surface 21 forms an angle α with the axis of the self-focusing lens, where α is 30 ° -60 °. By changing the angle, the sample light scattered back in a specific direction can be collected, and considering the actual requirement, more preferably, α is 40 °.
In the preferred embodiment of the present invention, the axis of the optical fiber 10 is coaxial with the axis of the self-focusing lens.
In the embodiment, the right end face of the optical fiber and the left end face of the G-Lens are connected together in a fusion welding mode, the optical fiber and the left end face of the G-Lens can bear certain tensile force after fusion welding, and meanwhile light transmitted in the optical fiber can enter the G-Lens from the right end face or can enter the optical fiber. The right end of the G-Lens is ground or cut to form a certain angle, and the surface of the G-Lens is plated with a light reflection film, so that light beams entering the G-Lens from the end face can emit light from the side face of the light emitting direction shown in the figure 6 after reaching the right end face; or the light reflected from the light-emitting direction can be reflected back to the G-Lens through the light reflecting film and transmitted to the optical fiber from the left end face.
Example two:
referring to fig. 7-9, on the basis of the first embodiment, the present embodiment is characterized in that: the torque cable connector further comprises a metal protection pipe 60, wherein one end of the metal protection pipe 60 forms an open end 61 for connecting a torque cable, and the other end of the metal protection pipe forms a closed end 62; the optical lens 20 is arranged in the metal protection tube 60, the inclined surface 21 of the optical lens 20 is positioned at the closed end 62 of the metal protection tube, the fusion-spliced part 30 between the optical lens 20 and the optical fiber 10 is arranged in the metal protection tube 60, and the other end of the optical fiber passes through the open end 61 of the metal protection tube 60 and extends outwards; the metal protection tube 60 is provided with a light hole 63 corresponding to the light inlet/outlet surface 22 of the optical lens 20. The light holes 63 prevent the light emitted from the side surface of the collimator from being blocked by the tube wall of the metal protection tube 60, and the relative position of the collimator and the metal tube should be controlled during assembly to ensure the smooth light path. Preferably, the light-transmitting holes 63 are rectangular cuts, the length of the cuts is slightly greater than the axial length of the G-Lens grinding surface, and the depth of the cuts is equal to or slightly less than half of the outer diameter of the metal tube.
The metal protection tube 60 has a hollow thin-walled structure with an inner diameter corresponding to the outer diameter of the G-Lens, and a wall thickness of 0.03-0.5mm is usually selected according to the overall size requirement of the product. The total length of the protective metal tube 60 is related to the length of the G-Lens, and is typically 2-5mm longer than the G-Lens, leaving room for the assembled torque cable.
In the preferred embodiment of the present invention, glue 70 is further filled between the inclined surface 21 of the optical lens 20 and the closed end 62 of the metal protection tube 60, so that the optical lens 20 is fixedly connected to the metal protection tube 60. Meanwhile, the filled glue can prevent the cavity from disturbing liquid to generate bubbles to influence a light path when the collimator rotates in a liquid environment.
In the preferred embodiment of the present invention, the closed end 62 of the metal protection tube 60 is formed in a hemispherical shape. The hemispherical closed end 62 serves to prevent scratching of other components as the collimator is rotated.
In the preferred embodiment of the present invention, the wall of the metal protection tube 60 adjacent to the open end 61 is provided with a through hole 64 communicating with the inner cavity of the metal protection tube 60. Specifically, the aperture of the through hole 64 corresponds to half of the outer diameter of the metal pipe. In the practical application process, after the open end 61 of the metal protection pipe 60 is connected with the torque cable, the metal protection pipe 60 is fixed with the torque cable through glue, the through hole 64 is used as a glue dispensing hole or a glue overflowing hole, and the collimator can be driven to rotate through the torque cable.
In the preferred embodiment of the present invention, the welding parameters are properly adjusted according to different welding machine types, so as to ensure that the tension force that the welding part 30 can bear is more than 10N. The return loss of the weld 30 should be 60dB or more, and the higher the return loss, the better. The insertion loss of the fusion-bonded part 30 should be 0.2dB or less, and the lower the insertion loss, the better.
In other embodiments of the present invention, glue may be used to fix the optical fiber and the optical lens 20 instead of fusion splicing in some situations where the insertion return loss is not high. Spot parameters of the collimator: the position of the beam waist of the collimator and the size of the beam waist spot are usually taken into account for fitting a specific use scenario. In the structure in the prior art, the length of the G-Lens is fixed, the parameters are controlled by adjusting the distance between the light-emitting surface (tail fiber) of the optical fiber in the collimator and the G-Lens, but the invention can also be controlled by adjusting the length of the G-Lens in the collimator, thereby reaching the same parameters and saving the trouble of repeated adjustment.
Example three:
a method of making a fiber collimator for OCT, comprising:
and (3) fusion welding of the optical fiber and the optical lens: connecting one end of the optical lens and one end of the optical fiber in a fusion welding mode to form a fusion welding part between the optical lens and the optical fiber; the other end of the optical lens is made into an inclined plane, a light reflection structure is arranged on the inclined plane, and a light inlet/outlet surface is formed on the side surface of the optical lens adjacent to the inclined plane;
the metal protection pipe installation step: providing a metal protection pipe, wherein one end of the metal protection pipe forms an open end used for connecting a torque cable, and the other end of the metal protection pipe forms a closed end; filling glue into the closed end of the metal protection tube, arranging an optical lens in the metal protection tube, wherein the inclined surface of the optical lens is positioned at the closed end of the metal protection tube, the fusion joint part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber penetrates through the open end of the metal protection tube and extends outwards; aligning the light hole on the metal protection tube with the light inlet/outlet surface of the optical lens, and finally bonding and fixing the inclined surface of the optical lens with glue.
In the practical application process, the method further comprises the following steps of: after the open end of the metal protection pipe is connected with the torque cable, the metal protection pipe and the torque cable are fixed through glue, and the through hole is used as a glue dispensing hole or a glue overflowing hole.
Example four
The fourth embodiment discloses an OCT apparatus including the fiber collimator for OCT of the first or second embodiment. The OCT equipment is based on the interference principle of weak coherent light, and obtains optical imaging of a two-dimensional or three-dimensional structure of biological tissues by detecting back reflection or scattering signals of different tissues to incident weak coherent light.
The OCT apparatus mainly includes an OCT optical scanning probe in addition to the above-described fiber collimator. The OCT optical scanning probe obtains images through internal optical fiber guide wire rotation scanning, and the probe axial motion can scan layer by layer while the optical fiber guide wire rotates, so that richer image information can be obtained.
While only certain features and embodiments of the application have been illustrated and described, many modifications and changes may occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the scope and spirit of the invention in the claims.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The optical fiber collimator for the OCT comprises an optical fiber for transmitting light beams and is characterized by further comprising an optical lens for collimating the light beams, wherein one end of the optical lens is connected with one end of the optical fiber in a fusion welding mode, so that a fusion welding part is formed between the optical lens and the optical fiber, the other end of the optical lens is provided with an inclined surface, a light reflection structure is arranged on the inclined surface, and a light inlet/outlet surface is formed on the side surface, adjacent to the inclined surface, of the optical lens.
2. The fiber collimator for OCT of claim 1, further comprising a metal protection tube, one end of which forms an open end for connecting a torque cable and the other end of which forms a closed end; the optical lens is arranged in the metal protection tube, the inclined surface of the optical lens is positioned at the closed end of the metal protection tube, the fusion joint part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber penetrates through the open end of the metal protection tube and extends outwards; and the metal protection tube is provided with a light hole corresponding to the light inlet/outlet surface of the optical lens.
3. The fiber collimator for OCT of claim 2, wherein a glue is further filled between the inclined surface of the optical lens and the closed end of the metal protection tube, so that the optical lens is fixedly connected to the metal protection tube.
4. The fiber collimator for OCT of claim 2, wherein said closed end of said metallic protective tube is formed in a hemispherical shape;
and/or the first and/or second light sources,
and the pipe wall of the metal protection pipe adjacent to the open end is provided with a through hole communicated with the inner cavity of the metal protection pipe.
5. The fiber collimator for OCT of claim 1, wherein the fusion-spliced portion is capable of withstanding a tensile force of 10N or more, a return loss of the fusion-spliced portion is 60dB or more, and an insertion loss of the fusion-spliced portion is 0.2dB or less.
6. The fiber collimator for OCT of claim 1, wherein said optical lens comprises a cylindrical self-focusing lens, one end of which forms said inclined surface; the light reflection structure is a light reflection film, and the reflectivity of the light reflection film to incident light is more than 99%.
7. The fiber collimator for OCT as claimed in claim 6, wherein an antireflection film is disposed on the light entrance/exit surface of the self-focusing lens, and the transmittance of the antireflection film to incident light is greater than 99%.
8. The fiber collimator for OCT of claim 6, wherein the inclined surface forms an angle α with the axis of the self-focusing lens, the angle α being 30 ° -60 °.
9. A method of making a fiber collimator for OCT, comprising:
and (3) fusion welding of the optical fiber and the optical lens: connecting one end of an optical lens and one end of an optical fiber in a fusion welding mode to form a fusion welding part between the optical lens and the optical fiber; the other end of the optical lens is manufactured to form an inclined plane, a light reflection structure is arranged on the inclined plane, and a light inlet/outlet surface is formed on the side surface of the optical lens adjacent to the inclined plane;
the metal protection pipe installation step: providing a metal protection pipe, wherein one end of the metal protection pipe forms an open end for connecting a torque cable, and the other end of the metal protection pipe forms a closed end; filling glue into the closed end of the metal protection tube, arranging an optical lens in the metal protection tube, wherein the inclined surface of the optical lens is positioned at the closed end of the metal protection tube, the fusion joint part between the optical lens and the optical fiber is arranged in the metal protection tube, and the other end of the optical fiber penetrates through the open end of the metal protection tube and extends outwards; aligning the light hole on the metal protection tube with the light inlet/outlet surface of the optical lens, and finally bonding and fixing the inclined surface of the optical lens with glue.
10. An OCT apparatus characterized by comprising the optical fiber collimator for OCT according to any one of claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474346.5A CN113237850A (en) | 2021-04-29 | 2021-04-29 | Optical fiber collimator for OCT (optical coherence tomography), manufacturing method and OCT equipment |
| PCT/CN2021/094707 WO2022227144A1 (en) | 2021-04-29 | 2021-05-19 | Optical fiber collimator for oct, manufacturing method, and oct device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474346.5A CN113237850A (en) | 2021-04-29 | 2021-04-29 | Optical fiber collimator for OCT (optical coherence tomography), manufacturing method and OCT equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113237850A true CN113237850A (en) | 2021-08-10 |
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| CN202110474346.5A Pending CN113237850A (en) | 2021-04-29 | 2021-04-29 | Optical fiber collimator for OCT (optical coherence tomography), manufacturing method and OCT equipment |
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| CN (1) | CN113237850A (en) |
| WO (1) | WO2022227144A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2022227144A1 (en) | 2022-11-03 |
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