CN107019488B - OCT probe and manufacturing method thereof - Google Patents
OCT probe and manufacturing method thereof Download PDFInfo
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- CN107019488B CN107019488B CN201610677877.3A CN201610677877A CN107019488B CN 107019488 B CN107019488 B CN 107019488B CN 201610677877 A CN201610677877 A CN 201610677877A CN 107019488 B CN107019488 B CN 107019488B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0062—Arrangements for scanning
- A61B5/0066—Optical coherence imaging
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Abstract
The invention provides an OCT probe which comprises a probe body, wherein the probe body is a coreless optical fiber, the end face of the coreless optical fiber is a reflecting surface, the reflecting surface is a curved surface reflecting surface, the side face of the coreless optical fiber is a light-emitting window, the light-emitting window is a plane light-emitting window, the projection of the curved surface reflecting surface at the plane light-emitting window is positioned in the plane light-emitting window, the curved surface reflecting surface is intersected with the plane light-emitting window, the outer surface of the coreless optical fiber is wrapped with a metal layer, and the outer surface of the plane light-emitting window is not wrapped with the metal layer. The invention also provides a manufacturing method of the OCT probe. The invention has the advantages that the light loss caused by refraction can be reduced by polishing a curved surface reflecting surface on the end surface of the coreless optical fiber and polishing a plane light-emitting window on the side surface of the coreless optical fiber, and the focusing and imaging effects are optimized.
Description
Technical Field
The present invention relates to probes, and more particularly, to an OCT probe and a method of manufacturing the same.
Background
Optical coherence tomography (Optical Coherence Tomography, OCT), namely, by utilizing near infrared light and an optical interference principle, the back reflection or scattering signals of different depth layers of biological tissues facing the incident near infrared light are detected, and a two-dimensional or three-dimensional structural image of the biological tissues can be obtained through scanning. In recent years, although it has been found that it has advantages such as no damage and high resolution in vascular imaging and in intra-luminal tissue (stomach) examination, it has been difficult to realize large-scale application due to problems such as complicated manufacturing process and poor imaging effect.
Most OCT probes currently on the market use two implementations:
1. and bonding a section of self-focusing optical fiber and the right-angle prism with the single-mode optical fiber by using an ultraviolet curing adhesive bonding mode. Although the structure is simple, the assembly process is complex, and the product quality is difficult to ensure. In addition, the refractive index of the optical fiber, the self-focusing lens, the right angle prism and the glue are different, so that the connection surfaces of the optical fiber, the self-focusing lens, the right angle prism and the glue can generate back reflection of light, and the interference is caused to the biological tissue image.
2. The coreless fiber is cut to a predetermined length by fusion-splicing the coreless fiber to a single-mode fiber, and then firing the end of the coreless fiber distal from the single-mode fiber into a ball lens. Finally, a total reflection surface is formed on the ball lens by laser or mechanical mode, so as to achieve the purpose of side light emission. The working distance of the probe can be adjusted by controlling the radius of curvature of the ball lens. And the coreless optical fiber is directly welded on the single-mode optical fiber, so that the problem of back reflection of light is avoided. But the manufacturing process is difficult, the production equipment is expensive, and mass production is difficult to realize.
Therefore, to expand the application field, it is critical to reduce the back reflection light, optimize the focusing and imaging effects, and reduce the difficulty and cost of the manufacturing process, and the structure of the OCT probe must be improved.
Disclosure of Invention
The invention provides an OCT probe and a manufacturing method thereof in order to solve the problems of complex structure, serious back reflection light, high manufacturing process difficulty and expensive production equipment of the front end of the existing OCT probe.
The invention provides an OCT probe which comprises a probe body, wherein the probe body is a coreless optical fiber, the end face of the coreless optical fiber is a reflecting surface, the reflecting surface is a curved surface reflecting surface, the side face of the coreless optical fiber is a light-emitting window, the light-emitting window is a plane light-emitting window, the projection of the curved surface reflecting surface at the plane light-emitting window is positioned in the plane light-emitting window, the curved surface reflecting surface is intersected with the plane light-emitting window, the outer surface of the coreless optical fiber is wrapped with a metal layer, and the outer surface of the plane light-emitting window is not wrapped with the metal layer.
As a further improvement of the invention, the planar light exit window is parallel to the axis of the coreless fiber.
As a further improvement of the present invention, the plane light exit window intersects with the axis of the coreless fiber at an acute angle.
As a further improvement of the present invention, the angle between the curved reflecting surface and the axis of the coreless optical fiber is between 45 degrees and 48 degrees.
As a further improvement of the invention, the curved reflecting surface is a sphere or an aspherical surface.
As a further improvement of the invention, the OCT probe further comprises an outer sheath, an inner sheath and a single-mode fiber, wherein one end of the coreless fiber far away from the curved surface reflecting surface is welded with the single-mode fiber, the inner sheath wraps the coreless fiber and the single-mode fiber, the outer sheath wraps the inner sheath, the inner sheath comprises a torque spring ring and a probe end sheath, the torque spring ring is in hot melting connection with the probe end sheath, the probe end sheath is positioned at one end of the coreless fiber, and the outer surface of the single-mode fiber is wrapped with a metal layer.
The invention also provides a manufacturing method of the OCT probe, which comprises the following steps:
s1, fusing a coreless optical fiber to a single-mode optical fiber;
s2, cutting the coreless optical fiber to a preset length;
s3, grinding one end face of the coreless optical fiber far away from the single-mode optical fiber into a curved reflecting surface;
s4, metallizing the coreless optical fiber and the single-mode optical fiber, and plating a metal layer on the outer surfaces of the coreless optical fiber and the single-mode optical fiber;
s5, grinding the side surface of the coreless optical fiber corresponding to the curved surface reflecting surface into a plane light-emitting window;
s6, penetrating the single-mode fiber and the coreless fiber into the torque spring ring;
s7, fixing the probe end sheath on the tail end of the torque spring ring in a hot melt mode, wherein the probe end sheath and the coreless optical fiber are positioned at the same end;
s8, outer jackets are arranged outside the torque spring ring and the probe tail end jacket.
As a further improvement of the present invention, in step S3, the angle of the curved reflecting surface to the axis of the coreless fiber is ground to be between 45 degrees and 48 degrees.
As a further improvement of the present invention, in step S3, the curved reflective surface is ground to be spherical or aspherical.
As a further improvement of the present invention, in step S4, the outer surface of the coreless optical fiber or the single-mode optical fiber is coated with a silver layer or an aluminum layer, and then coated with a chromium layer.
The beneficial effects of the invention are as follows: through the scheme, the curved surface reflecting surface is polished on the end face of the coreless optical fiber, and the plane light-emitting window is polished on the side face of the coreless optical fiber, so that the light loss caused by refraction can be reduced, the focusing and imaging effects are optimized, the front end structure of the OCT probe is simple, the back reflected light is reduced, the manufacturing process difficulty is low, and the production cost is low.
Drawings
Fig. 1 is a schematic diagram of an OCT probe of the present invention.
Fig. 2 is a schematic view of a probe body of an OCT probe of the present invention.
Fig. 3 is another schematic view of the probe body of an OCT probe of the present invention.
Detailed Description
The invention is further described with reference to the following description of the drawings and detailed description.
As shown in fig. 1, an OCT probe includes a probe body, the probe body is a coreless optical fiber 3, the end face of the coreless optical fiber 3 is a reflecting surface, the reflecting surface is a curved surface reflecting surface 1, the side surface of the coreless optical fiber 3 is a light emitting window, the light emitting window is a plane light emitting window 2, the projection of the curved surface reflecting surface 1 at the plane light emitting window 2 is all located in the plane light emitting window 2, the curved surface reflecting surface 1 intersects with the plane light emitting window 2, the outer surface of the coreless optical fiber 3 is wrapped with a metal layer, the outer surface of the plane light emitting window 2 is not wrapped with the metal layer, and the OCT probe penetrates into a blood vessel wall 8 to perform imaging work.
As shown in fig. 2, the planar light exit window 2 is parallel to the axis of the coreless fiber 3.
As shown in fig. 3, the plane light exit window 2 intersects with the axis of the coreless fiber 3 at an acute angle, which is approximately between 5 degrees and 15 degrees.
As shown in fig. 1 to 3, the angle between the curved reflecting surface 1 and the axis of the coreless fiber 3 is between 45 degrees and 48 degrees.
As shown in fig. 1 to 3, the curved reflecting surface 1 is a spherical surface or an aspherical surface.
As shown in fig. 1 to 3, the OCT probe further includes an outer sheath 7, an inner sheath and a single-mode fiber 4, where one end of the coreless fiber 3 away from the curved reflective surface 1 is welded to the single-mode fiber 4, the inner sheath wraps the coreless fiber 3 and the single-mode fiber 4, the outer sheath 7 wraps the inner sheath, the inner sheath includes a torsion spring ring 6 and a probe end sheath 5, the torsion spring ring 6 is in hot-melt connection with the probe end sheath 5, the probe end sheath 5 is located at one end of the coreless fiber 3, and the outer surface of the single-mode fiber 4 is also wrapped with a metal layer.
As shown in fig. 1 to 3, a method for manufacturing an OCT probe includes the steps of:
s1, welding a coreless optical fiber 3 to a single-mode optical fiber 4;
s2, cutting the coreless optical fiber 3 to a preset length;
s3, grinding an end face, away from the single-mode optical fiber 4, of the coreless optical fiber 3 into a curved reflecting face 1;
s4, metallizing the coreless optical fiber 3 and the single-mode optical fiber 4, and plating a metal layer on the outer surfaces of the coreless optical fiber 3 and the single-mode optical fiber 4;
s5, grinding the side surface of the coreless optical fiber 3 corresponding to the curved surface reflecting surface 1 into a plane light-emitting window 2;
s6, penetrating the single-mode fiber 4 and the coreless fiber 3 into the torque spring ring 6;
s7, fixing the probe end sheath 5 at the end of the torque spring ring 6 in a hot melt mode, wherein the probe end sheath 5 and the coreless optical fiber 3 are positioned at the same end;
s8, an outer sheath 7 is additionally arranged outside the torque spring ring 6 and the probe end sheath 5.
In step S3, the angle between the curved reflecting surface 1 and the axis of the coreless fiber 3 is polished to be between 45 degrees and 48 degrees.
In step S3, the curved reflective surface 1 is polished to be spherical or aspherical.
In step S4, a layer of silver or a layer of aluminum is first plated on the outer surfaces of the coreless optical fiber 4 and the single-mode optical fiber 5, and then a layer of chromium is plated.
The OCT probe and the manufacturing method thereof provided by the invention have the following advantages:
1. by polishing a curved surface reflecting surface 1 on the end surface of the coreless fiber 3 and polishing a plane light-emitting window 2 on the side surface of the coreless fiber 3, the loss of light caused by refraction can be reduced, and the focusing and imaging effects are optimized.
2. The integrated design of the probe body and the single-mode fiber 4 is adopted, so that the manufacturing process is simplified, the mass production is easy, and the cost is reduced.
3. The probe body and the single-mode optical fiber 4 are metallized, so that the fragile optical fiber is well protected, and breakage can be prevented in the using process.
The OCT probe and the manufacturing method thereof provided by the invention can simplify the manufacturing process, increase the stability of components and optimize the focusing of light, and are suitable for OCT imaging of blood vessels, esophagus and other cavities.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (7)
1. An OCT probe, characterized by: the probe comprises a probe body, wherein the probe body is a coreless optical fiber, the end face of the coreless optical fiber is a reflecting surface, the reflecting surface is a curved surface reflecting surface, the side face of the coreless optical fiber is a light-emitting window, the light-emitting window is a plane light-emitting window, the projection of the curved surface reflecting surface at the plane light-emitting window is positioned in the plane light-emitting window, the curved surface reflecting surface is intersected with the plane light-emitting window, the outer surface of the coreless optical fiber is wrapped with a metal layer, and the outer surface of the plane light-emitting window is not wrapped with the metal layer; the plane light-emitting window is parallel to the axis of the coreless optical fiber or intersects with the axis of the coreless optical fiber at an acute angle.
2. The OCT probe of claim 1, wherein: the included angle between the curved surface reflecting surface and the axis of the coreless optical fiber is 45-48 degrees.
3. The OCT probe of claim 1, wherein: the curved reflecting surface is a sphere or an aspheric surface.
4. The OCT probe of claim 1, wherein: the OCT probe further comprises an outer sheath, an inner sheath and a single-mode fiber, one end of the coreless fiber, far away from the curved surface reflecting surface, is welded with the single-mode fiber, the inner sheath wraps the coreless fiber and the single-mode fiber, the outer sheath wraps the inner sheath, the inner sheath comprises a torque spring ring and a probe tail end sheath, the torque spring ring is in hot melting connection with the probe tail end sheath, the probe tail end sheath is located at one end of the coreless fiber, and a metal layer wraps the outer surface of the single-mode fiber.
5. A method of manufacturing an OCT probe, comprising the steps of:
s1, fusing a coreless optical fiber to a single-mode optical fiber;
s2, cutting the coreless optical fiber to a preset length;
s3, grinding one end face of the coreless optical fiber far away from the single-mode optical fiber into a curved reflecting surface; wherein, the angle between the curved surface reflecting surface and the axis of the coreless optical fiber is ground to be 45-48 degrees;
s4, metallizing the coreless optical fiber and the single-mode optical fiber, and plating a metal layer on the outer surfaces of the coreless optical fiber and the single-mode optical fiber;
s5, grinding the side surface of the coreless optical fiber corresponding to the curved surface reflecting surface into a plane light-emitting window;
s6, penetrating the single-mode fiber and the coreless fiber into the torque spring ring;
s7, fixing the probe end sheath on the tail end of the torque spring ring in a hot melt mode, wherein the probe end sheath and the coreless optical fiber are positioned at the same end;
s8, outer jackets are arranged outside the torque spring ring and the probe tail end jacket.
6. The method of manufacturing an OCT probe according to claim 5, wherein: in step S3, the curved reflective surface is polished to be spherical or aspherical.
7. The method of manufacturing an OCT probe according to claim 5, wherein: in step S4, a layer of silver or a layer of aluminum is plated on the outer surfaces of the coreless optical fiber and the single-mode optical fiber, and then a layer of chromium is plated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677877.3A CN107019488B (en) | 2016-08-17 | 2016-08-17 | OCT probe and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677877.3A CN107019488B (en) | 2016-08-17 | 2016-08-17 | OCT probe and manufacturing method thereof |
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| CN107019488A CN107019488A (en) | 2017-08-08 |
| CN107019488B true CN107019488B (en) | 2023-07-28 |
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| CN201610677877.3A Active CN107019488B (en) | 2016-08-17 | 2016-08-17 | OCT probe and manufacturing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109061805A (en) * | 2018-07-23 | 2018-12-21 | 深圳永士达医疗科技有限公司 | A kind of collimator and optical catheter connection structure |
| CN109124588A (en) * | 2018-09-25 | 2019-01-04 | 南开大学 | A kind of OCT probe for mouth disease inspection |
| CN109186647B (en) * | 2018-10-10 | 2024-01-02 | 武汉昊衡科技有限公司 | Device and method for eliminating reflection of optical fiber end face |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5192247B2 (en) * | 2008-01-29 | 2013-05-08 | 並木精密宝石株式会社 | OCT probe |
| CN204072038U (en) * | 2014-09-02 | 2015-01-07 | 乐普（北京）医疗器械股份有限公司 | OCT endoscopic imaging probe and OCT imaging catheter |
| CN105411509B (en) * | 2014-09-02 | 2017-11-10 | 乐普（北京）医疗器械股份有限公司 | OCT endoscopic imaging probes and its manufacture method and OCT image conduit |
| CN206315075U (en) * | 2016-08-17 | 2017-07-11 | 深圳英美达医疗技术有限公司 | A kind of OCT probe |
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Address after: 518000 area 01, 8 / F, building B, haikexing strategic emerging industrial park, No.16 Baoshan Road, intersection of Jinlong Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen City, Guangdong Province Applicant after: INNERMEDICAL Co.,Ltd. Address before: 518000 room 1501, Pioneer Park, Lishan road University Town, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: INNERMEDICAL Co.,Ltd. |
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