CN214669715U - Optical fiber integrated lens for probe and endoscope imaging system - Google Patents
Optical fiber integrated lens for probe and endoscope imaging system Download PDFInfo
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- CN214669715U CN214669715U CN202120587254.3U CN202120587254U CN214669715U CN 214669715 U CN214669715 U CN 214669715U CN 202120587254 U CN202120587254 U CN 202120587254U CN 214669715 U CN214669715 U CN 214669715U
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Abstract
The utility model provides an optical fiber integrated lens for probe and endoscope imaging system, the optical fiber probe uses the combination of graded index optical fiber and ball lens at the end thereof to realize light focusing, the ball lens is located the end of the optical fiber probe, the ball lens comprises a reflecting surface, the reflecting surface is located the outer side of the ball lens; the graded index optical fiber is connected with the signal transmission optical fiber of the optical fiber probe. The technical scheme of the utility model, the integrated fiber lens obtained by combining the ball lens and the graded index fiber can focus light in the liquid environment with large refractive index (such as refractive index larger than 1), can realize large working distance and high resolution simultaneously, and is easy to manufacture and install; can be applied in the fields including but not limited to OCT imaging and photoacoustic imaging, fluorescence imaging and the like.
Description
Technical Field
The utility model relates to an endoscope technical field especially relates to an optic fibre integration lens and endoscope imaging system for probe.
Background
In the field of optical endoscopic imaging, particularly in the field of endoscopy using coherent optical tomography (hereinafter referred to as OCT), it is often necessary to use an optical fiber as a transmission medium for optical signals, and it is generally necessary to focus light at the end of the optical fiber. The conventional method for focusing light is to use a graded index fiber or a prism to achieve the convergence of the fiber, which requires a refractive prism to be bonded to the end of the fiber. However, due to the reflection of the end face, the end face of the optical fiber is usually required to be subjected to angle grinding to reduce the return light, but this method is difficult to realize the integrated assembly of the probe. Another way to achieve focusing of the optical fiber is to perform an end face machining on the end face of the optical fiber, and a special shape, such as a cone or a sphere, can be formed on the end face of the optical fiber to achieve focusing of the optical fiber. Then, a total reflection surface is ground at the tail end or a metal coating is used, so that light can be converged and emitted in the lateral direction. The united states patent US10791923B2 discloses that the focusing of light beams is realized by using a coreless fiber to fuse into a spherical light-emitting surface, and the innovation point of the patent is that the double-clad fiber is used to realize the optical path transmission of two channels, so that multi-mode imaging can be realized. This approach is generally applicable in air, i.e., where the difference in refractive index between the fiber and the air is sufficiently large. If such a scene occurs in a liquid (e.g., water) with a refractive index greater than 1, it is generally necessary to greatly reduce the radius of curvature of the fiber optic ball lens, which generally results in large aberrations of the imaging system. Also, such lenses generally have difficulty achieving higher resolution when achieving larger working distances. In addition, the 3D printing can be used for realizing the integrated fiber lens, but the method has higher cost and higher requirement on the processing precision of the light-emitting surface.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model discloses a probe is with optic fibre integration lens and endoscope imaging system, this lens have the advantage of integration for the fiber lens based on graded index optic fibre or prism, and for the traditional fiber lens based on ball lens, the refracting index to the environment is insensitive, can realize big working distance and high resolution simultaneously.
To this end, the technical scheme of the utility model is that:
an optical fiber integrated lens for a probe, wherein the optical fiber probe realizes light focusing by using a combination of a graded index optical fiber and a ball lens positioned at the tail end of the optical fiber probe, the ball lens is positioned at the tail end of the optical fiber probe and comprises a reflecting surface, and the reflecting surface is positioned at the outer side of the ball lens; the graded index optical fiber is connected with the signal transmission optical fiber of the optical fiber probe.
By adopting the technical scheme, after light enters the graded-index optical fiber through the signal transmission optical fiber, the light spot is enlarged, the divergence angle of the light beam is reduced or converged, the light with a smaller divergence angle is reflected by the reflecting surface of the ball lens, and the reflected light is converged at the side end of the optical fiber through the emergent surface of the ball lens, so that the light can be focused in a liquid environment with a large refractive index (such as the refractive index larger than 1).
Furthermore, an included angle is formed between the normal direction of the reflecting surface and the transmission direction of the optical fiber.
As a further improvement of the present invention, the signal transmission fiber is a single mode fiber, a double clad fiber or a multi-clad fiber.
As a further improvement of the present invention, the graded-index optical fiber is a graded-index lens, the outer diameter of the graded-index lens may be the same as or different from the outer diameter of the signal transmission optical fiber.
As a further improvement of the present invention, the signal transmission fiber is connected to the graded-index fiber by fusion splicing or adhesive. Wherein the connection through the adhesive is the solidification connection after the connection by adopting the optical glue.
As a further improvement of the present invention, the reflecting surface is obtained by grinding a rear film of the ball lens. Furthermore, the reflecting surface is plated with a reflecting film.
The utility model also discloses an endoscope imaging system, which comprises an optical fiber integrated lens, a spring tube, an outer sheath tube, a photoelectric slip ring/a light slip ring and a driving mechanism, wherein the probe is wrapped in the spring tube by the optical fiber integrated lens, and the spring tube is positioned in the outer sheath tube; the driving mechanism is connected with the spring tube, the spring tube is connected to the photoelectric slip ring/smooth ring, the optical fiber is connected with the photoelectric slip ring/smooth ring, and the driving mechanism drives the spring tube to rotate, so that the optical fiber integrated lens for the probe can realize the annular scanning of the biological tissue; the optical fiber integrated lens for a probe is the optical fiber integrated lens for a probe described above.
Further, the driving mechanism includes a motor.
As a further improvement of the present invention, the endoscopic imaging system comprises a laser light source, a first optical fiber coupler, a second optical fiber coupler, a first optical fiber circulator, a second optical fiber circulator, a reflector and a detector;
the photoelectric slip ring/smooth ring is connected with the first optical fiber circulator through the first optical fiber coupler; the laser light source is connected with the second optical fiber coupler through a transmission optical fiber, one output end of the second optical fiber coupler is connected with the first optical fiber circulator, the first optical fiber circulator is connected with the detector, the other output end of the optical fiber coupler is connected with the second optical fiber circulator, an optical signal of the reflector is transmitted to the detector through the second optical fiber circulator, and after the optical signal scattered or reflected back to the optical fiber integrated lens with the biological tissue is interfered by the optical signal which is reversely transmitted and reaches the detector through the first optical fiber circulator, the signal is transmitted to the computer. Further, the signal is processed to obtain an OCT image of the biological tissue.
Compared with the prior art, the beneficial effects of the utility model are that:
the technical scheme of the utility model, the integrated fiber lens obtained by combining the ball lens and the graded index fiber can focus light in the liquid environment with large refractive index (such as refractive index larger than 1), and can realize large working distance and high resolution simultaneously; and the optical fiber is easy to manufacture and install, and can be applied to the fields including but not limited to OCT imaging, photoacoustic imaging, fluorescence imaging and the like.
Drawings
Fig. 1 is a schematic structural diagram of an optical fiber integrated lens for a probe according to the present invention.
Fig. 2 is a schematic structural diagram of the OCT endoscope imaging system of the present invention.
The reference numerals include:
1-signal transmission optical fiber, 2-graded index optical fiber, 3-ball lens and 4-reflecting surface;
5-biological tissue, 6-optical fiber integrated lens, 7-annular scanning direction, 8-motor, 9-photoelectric slip ring/optical slip ring, 10-first optical fiber coupler, 11-first optical fiber circulator, 12-second optical fiber coupler, 13-laser light source, 14-reflector, 15-detector, 16-computer, 17-second optical fiber circulator.
Detailed Description
Preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, an optical fiber integrated lens for a probe, the optical fiber probe uses a combination of a graded index optical fiber 2 and a ball lens 3 at the end of the optical fiber probe to realize light focusing, the ball lens 3 is located at the end of the optical fiber probe, the ball lens 3 comprises a reflecting surface 4, and the reflecting surface 4 is located at the outer side of the ball lens 3; the graded index optical fiber 2 is connected with the signal transmission optical fiber 1 of the optical fiber probe. The graded index optical fiber 2 is used for bending the light transmission direction, and the reflecting surface 4 is used for bending the light transmission direction. The signal transmission optical fiber 1 and the graded index optical fiber 2 are connected through fusion welding or optical adhesive curing.
Further, the reflecting surface 4 is obtained by grinding a rear film of the ball lens 3. Preferably, the reflecting surface 4 may be further plated with a reflecting film.
Further, the graded index optical fiber 2 may be a graded index lens, and an outer diameter of the graded index lens is the same as or different from an outer diameter of the signal transmission optical fiber.
The signal transmission fiber 1 may be a single-mode fiber, a double-clad fiber or a multi-clad fiber, so as to realize multi-channel transmission and reception of a light path and realize optical multi-mode imaging.
By adopting the technical scheme of the embodiment, after the light passes through the graded-index optical fiber 2, the light spot is enlarged, the divergence angle of the light beam is reduced or converged, the light with a smaller divergence angle is reflected by the reflecting surface 4 of the ball lens 3, and the reflected light is converged at the side end of the signal transmission optical fiber 1 through the emergent surface of the ball lens 3, so that the light can be focused in the liquid environment with large refractive index (if the refractive index is larger than 1), and the large working distance and the high resolution can be realized at the same time.
Example 2
As shown in fig. 1 and 2, an endoscopic imaging system includes a fiber-optic integrated lens 6, a spring tube, an outer sheath tube, a motor 8, a laser light source 13, a first fiber coupler 10, a second fiber coupler 12, a first fiber circulator 11, a second fiber circulator 17, a reflector 14, and a detector 15. The optical fiber integrated lens 6 is wrapped in a spring tube, and the spring tube is wrapped and protected by an outer sheath tube; the spring tube is connected to the photoelectric slip ring/smooth ring 9, and the signal transmission optical fiber 1 in the spring tube is connected with the photoelectric slip ring/smooth ring 9. The motor 8 drives the spring tube to rotate, so that the optical fiber integrated lens 6 can circularly scan the biological tissue 5 to form a circular scanning direction 7. The optical fiber integrated lens 6 is the optical fiber integrated lens for a probe described in embodiment 1. Wherein, the spring tube and the sheath tube are not shown in the figure.
The photoelectric slip ring/smooth ring 9 is connected with a first optical fiber circulator 11 through a first optical fiber coupler 10; the laser light source 13 is connected with the second optical fiber coupler 12 through a transmission optical fiber, one output end of the second optical fiber coupler 12 is connected with the first optical fiber circulator 11, the first optical fiber circulator 11 is connected with the detector 15, the other output end of the second optical fiber coupler 12 is connected with the second optical fiber circulator 12, and an optical signal of the reflector 14 is transmitted to the detector 15 through the second optical fiber circulator 12.
The light scattered or reflected by the biological tissue 5 back to the fiber-optic integrated lens 6 is transmitted back through the first fiber-optic circulator 11 to the detector 15, and forms interference with the light signal from the reflector 14, and the signal is transmitted to the computer 16, and the OCT image of the biological tissue 5 is obtained through data processing.
The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the shape and structure of the present invention are within the protection scope of the present invention.
Claims (8)
1. The utility model provides a probe is with optic fibre integration lens which characterized in that: the optical fiber probe realizes light focusing by using a combination of a graded index optical fiber and a ball lens positioned at the tail end of the graded index optical fiber, wherein the ball lens is positioned at the tail end of the optical fiber probe and comprises a reflecting surface which is positioned at the outer side of the ball lens; the graded index optical fiber is connected with the signal transmission optical fiber of the optical fiber probe.
2. The optical fiber integrated lens for a probe according to claim 1, wherein: the signal transmission optical fiber is a single mode optical fiber, a double-clad optical fiber or a multi-clad optical fiber.
3. The optical fiber integrated lens for a probe according to claim 1, wherein: the graded index optical fiber is a graded index lens, and the outer diameter of the graded index lens is the same as or different from that of the signal transmission optical fiber.
4. The optical fiber integrated lens for a probe according to claim 1, wherein: the signal transmission optical fiber and the graded index optical fiber are connected through welding or adhesive.
5. The optical fiber integrated lens for a probe according to claim 1, wherein: the reflecting surface is obtained by grinding the rear film of the ball lens.
6. The optical fiber integrated lens for a probe according to claim 5, wherein: the reflecting surface is plated with a reflecting film.
7. An endoscopic imaging system characterized by: the photoelectric slip ring/optical slip ring optical fiber integrated lens comprises an optical fiber integrated lens, a spring tube, an outer sheath tube, a photoelectric slip ring/optical slip ring and a driving mechanism, wherein the optical fiber integrated lens is wrapped in the spring tube, and the spring tube is positioned in the outer sheath tube; the driving mechanism is connected with the spring tube, the spring tube is connected to the photoelectric slip ring/smooth ring, the optical fiber is connected with the photoelectric slip ring/smooth ring, and the driving mechanism drives the spring tube to rotate, so that the optical fiber integrated lens for the probe can realize the annular scanning of the biological tissue;
the optical fiber integrated lens for the probe according to any one of claims 1 to 6 is used as the optical fiber integrated lens for the probe.
8. The endoscopic imaging system of claim 7, wherein: the device comprises a laser light source, a first optical fiber coupler, a second optical fiber coupler, a first optical fiber circulator, a second optical fiber circulator, a reflector and a detector;
the photoelectric slip ring/smooth ring is connected with the first optical fiber circulator through the first optical fiber coupler; the laser light source is connected with the second optical fiber coupler through a transmission optical fiber, one output end of the second optical fiber coupler is connected with the first optical fiber circulator, the first optical fiber circulator is connected with the detector, the other output end of the optical fiber coupler is connected with the second optical fiber circulator, an optical signal of the reflector is transmitted to the detector through the second optical fiber circulator, and after the optical signal scattered or reflected back to the optical fiber integrated lens with the biological tissue is interfered by the optical signal which is reversely transmitted and reaches the detector through the first optical fiber circulator, the signal is transmitted to the computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120587254.3U CN214669715U (en) | 2021-03-23 | 2021-03-23 | Optical fiber integrated lens for probe and endoscope imaging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120587254.3U CN214669715U (en) | 2021-03-23 | 2021-03-23 | Optical fiber integrated lens for probe and endoscope imaging system |
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| CN214669715U true CN214669715U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114424931A (en) * | 2022-01-27 | 2022-05-03 | 苏州博动戎影医疗科技有限公司 | OCT probe assembly and imaging system comprising same |
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2021
- 2021-03-23 CN CN202120587254.3U patent/CN214669715U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114424931A (en) * | 2022-01-27 | 2022-05-03 | 苏州博动戎影医疗科技有限公司 | OCT probe assembly and imaging system comprising same |
| CN114424931B (en) * | 2022-01-27 | 2023-06-30 | 苏州博动戎影医疗科技有限公司 | OCT probe assembly and imaging system comprising same |
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