CN216411073U - Optical probe for detecting immersion liquid - Google Patents
Optical probe for detecting immersion liquid Download PDFInfo
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- CN216411073U CN216411073U CN202122552709.0U CN202122552709U CN216411073U CN 216411073 U CN216411073 U CN 216411073U CN 202122552709 U CN202122552709 U CN 202122552709U CN 216411073 U CN216411073 U CN 216411073U
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Abstract
The utility model discloses an optical probe for detecting immersion liquid, which comprises an optical probe, and a light source, a spectroscope, a coupling lens, an optical fiber sensor and a photoelectric detector which are sequentially arranged along a light path; the optical fiber sensor is fixed with the optical probe, the optical fiber sensor is a multimode optical fiber, a fiber core is arranged in the multimode optical fiber, one end of the optical fiber sensor, which is far away from the coupling objective lens, is plated with a permeability reducing film, and the refractive index of the permeability reducing film is higher than that of the fiber core. The principle of optical fiber coating and reflection is utilized, and the end of the optical fiber sensor is coated with the antireflection film, so that part of light is transmitted at the end, and part of light can return to the spectroscope along the original light path and then is collected by the photoelectric detector; then, the collected light energy is compared by combining the common knowledge that the refractive index of the air is different from that of the liquid, and when the optical probe is in an immersion liquid state, the energy of the returned light is obviously reduced compared with that in the air, so that whether the optical probe is in the immersion liquid state or not can be obviously judged.
Description
Technical Field
The utility model belongs to the field of microscopic endoscopes, and particularly relates to an optical probe for detecting immersion liquid.
Background
In a micro-endoscope system, a micro optical probe is an important part and is the only part which is in direct contact with the internal environment of a human body in each part of the whole system.
Various environments exist in the human body, taking the digestive tract as an example, and various secretions such as gastric acid, bile and the like exist in the stomach, colon, duodenum and pancreatic bile duct. The existence of these environments puts high requirements on acid and alkali resistance and corrosion resistance on the micro optical probe. Meanwhile, the micro-optical probe is not disposable and needs to be used on different patients, so that the micro-optical probe must be soaked for disinfection after being used once, and cross infection is avoided.
The micro optical probe has a complex structure and a plurality of elements, and some bonded elements exist. The adhesive strength of these adhesive joints is reduced by the corrosion of the liquid in the human body and the corrosion of the disinfectant, and when the adhesive strength is reduced to a certain value, there are risks of adhesive failure, falling of the adhesive, and the like, which may cause serious medical accidents.
In order to avoid the occurrence of upper risk and even medical accidents, the micro optical probe is subjected to corrosion and disinfection tests in the development stage, the use and disinfection environment is simulated, the times and time of safe use of the micro optical probe can be determined, and when the times of use are less than the safe times and the total use duration is less than a specified value, the use of the probe is absolutely safe. When the use times reach the safe times or the total use duration is greater than a specified value, the software system pops up a prompt on the user interface, and even limits the use of the miniature optical probe.
Therefore, it is very important to record the actual usage of the micro-optical probe, detect whether the probe is immersed in the liquid, and collect the corresponding data to specify the safe usage times and time of the micro-optical probe after shipment.
SUMMERY OF THE UTILITY MODEL
In view of the above drawbacks and needs of the prior art, the present invention provides an optical probe for detecting immersion liquid, which is aimed at solving the technical problem of actually detecting and recording the usage of a micro-optical probe.
In order to achieve the above object, according to one aspect of the present invention, there is provided an optical probe for detecting immersion liquid, including an optical probe, and a light source, a spectroscope, a coupling lens, and an optical fiber sensor sequentially disposed along a light path, where the spectroscope includes two light splitting paths, the optical fiber sensor is located on one of the light splitting paths, and a photodetector is disposed on the other light splitting path of the spectroscope;
the optical fiber sensor is fixed with the optical probe, the optical fiber sensor is a multimode optical fiber, a fiber core is arranged in the multimode optical fiber, one end, far away from the coupling lens, of the optical fiber sensor is plated with a permeability reducing film, and the refractive index of the permeability reducing film is higher than that of the fiber core.
In the technical scheme, the principle of optical fiber coating and reflection is utilized, and the end of the optical fiber sensor is coated with the antireflection film, so that part of light is transmitted at the end, and part of light can return to the spectroscope along the original light path and then is collected by the photoelectric detector; then, the collected light energy is compared by combining the common knowledge that the refractive index of the air is different from that of the liquid, and when the optical probe is in an immersion liquid state, the energy of the returned light is obviously reduced compared with that in the air, so that whether the optical probe is in the immersion liquid state or not can be obviously judged. The scheme can be applied to the conventional confocal micro-endoscope, two-photon micro-endoscope, multi-photon micro-endoscope and the like, and is used for carrying out immersion detection on the optical probe in the endoscope system.
Preferably, the thickness of the permeability-reducing film is 0.01mm to 1 mm.
Preferably, the refractive index of the antireflection film ranges from 1.6 to 2.5.
Preferably, one end of the optical fiber sensor close to the coupling lens is provided with an optical fiber plug.
Preferably, the device further comprises a housing, and the light source, the spectroscope, the coupling lens and the photodetector are fixed in the housing.
Preferably, an optical fiber connector is connected between the housing and the optical fiber sensor, the housing and the optical fiber sensor are optically conducted through the optical fiber connector, one end of the optical fiber connector, which is close to the coupling lens, receives light focused by the coupling lens, and one end of the optical fiber connector, which is close to the optical fiber sensor, is adapted to the optical fiber plug.
Preferably, the light source provides infrared light of a wavelength in the range of 800nm to 2000 nm.
Preferably, the coupling lens is a single spherical lens, or a lens group.
Preferably, a pipe is arranged on the peripheral side of the optical probe, and the optical probe and the optical fiber sensor are wrapped in the pipe.
Preferably, the pipe is a sleeve or a heat shrink tube.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a schematic structural diagram of an optical fiber sensor;
FIG. 3 is a schematic cross-sectional view of an optical probe and fiber optic sensor;
FIG. 4 is a schematic view of a prior art endoscope system;
FIG. 5 is a schematic flow chart of the immersion liquid detection method of the present application.
In the figure, 1, a light source; 2. a beam splitter; 3. a coupling lens; 4. a photodetector; 5. an optical fiber splice; 6. an optical fiber sensor; 7. an optical probe; 8. a fiber core; 9. a permeability reducing membrane; 10. a pipeline; 11. an endoscope host; 12. a computer system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the present invention provides an optical probe for detecting immersion liquid, including an optical probe 7, and a light source 1, a spectroscope 2, a coupling lens 3, and an optical fiber sensor 6 sequentially arranged along a light path, where the spectroscope 2 includes two light splitting paths, the optical fiber sensor 6 is located on one of the light splitting paths, and a photodetector 4 is arranged on the other light splitting path of the spectroscope 2; the optical fiber sensor 6 is fixed with the optical probe 7, the optical fiber sensor 6 is a multimode optical fiber, a fiber core 8 is arranged in the multimode optical fiber, a permeability reducing film 9 is plated on one end, far away from the coupling lens 3, of the optical fiber sensor 6, and the refractive index of the permeability reducing film 9 is higher than that of the fiber core 8.
The principle of optical fiber coating and reflection is utilized, the reflectivity of a light beam on the interface of two substances is related to the difference of the refractive indexes of the two substances, and the larger the difference of the refractive indexes of the two substances is, the higher the reflectivity of the light on the two interfaces is. Therefore, the end of the multimode optical fiber far away from the coupling lens 3 is plated with the antireflection film 9 with the refractive index higher than that of the fiber core 8, so that more light energy can be returned and then detected by the photoelectric detector 4. Since the refractive index of air is smaller than that of liquid, when the optical probe 7 is in the immersion state, the refractive index of the side of the antireflection film 9 away from the fiber core 8 is larger than that of the optical probe 7 in the air, and therefore, when the photodetector 4 detects the returned light energy, it is found that the returned light energy is smaller than that in the air, and therefore, whether the optical probe 7 is in the immersion state can be judged according to the returned light energy detected by the photodetector 4.
Moreover, the diameter of the multimode fiber core 8 is generally 50 μm, the volume is small, the volume of the optical probe 7 is not obviously increased after the multimode fiber core 8 is fixedly integrated with the optical probe 7, and the optical probe 7 can still move and image in a narrow channel in a human body.
Specifically, light emitted by the light source 1 passes through the spectroscope 2, the coupling lens 3 and the optical fiber sensor 6 in sequence, then is partially transmitted out of the optical fiber sensor 6 at the position of the antireflection film 9, is partially reflected, returns to the coupling lens 3 along the optical fiber sensor 6, reaches the spectroscope 2, and is finally detected by the photoelectric detector 4 through another light splitting path of the spectroscope 2. The permeability reducing film 9 can be made of materials such as aluminum oxide, magnesium oxide and the like with refractive index higher than that of the optical fiber, and is plated at the tail end of the optical fiber sensor 6 by adopting the processes such as a chemical deposition method, a thermal evaporation method and the like, the thickness is 0.01mm-1mm, and the refractive index range of the permeability reducing film is 1.6-2.5.
One end of the fiber sensor 6 near the coupling lens 3 is provided as a fiber plug, for example in the form of ST, SC, FC, LC, etc.
The light source device further comprises a shell, and the light source 1, the spectroscope 2, the coupling lens 3 and the photoelectric detector 4 are fixed in the shell, so that each part can be conveniently and quickly fixed. An optical fiber connector 5 is connected between the housing and the optical fiber sensor 6, light transmission is performed between the housing and the optical fiber sensor 6 through the optical fiber connector 5, one end of the optical fiber connector 5, which is close to the coupling lens 3, receives light focused by the coupling lens 3, one end, which is close to the optical fiber sensor 6, is adapted to an optical fiber plug thereof, the end is in a standard connector form, such as FC/SC/APC, and the middle part of the whole optical fiber connector 5 is also a multimode optical fiber.
The light source 1 provides infrared light with a wavelength in the range of 800nm-2000nm, the infrared light source 1 is a modulated pulsed laser with a modulation frequency of tens of hertz to hundreds of hertz.
The infrared light emitted by the light source 1 is transmitted by the spectroscope 2, focused by the coupling lens, enters the optical fiber connector 5 at a large divergence angle, enters the optical fiber sensor 6 through the optical fiber plug until the total reflection film is totally reflected, returns along the optical fiber sensor 6, then reaches the spectroscope 2 through the optical fiber connector 5 and the coupling lens 3 in sequence, and is reflected by the spectroscope 2 by 90 degrees and then reaches the photoelectric detector 4. The detection surface of the optical fiber sensor 6 is perpendicular to the central line of the light reflected by the spectroscope 2. Of course, the beam splitter 2 may also be disposed at an angle within 10 ° to 80 ° with the infrared light emitted from the light source 1. The ratio of the light intensity of the transmitted light to the reflected light by the beam splitter 2 is generally 5:5, and may also be 7: 3 or 9: 1, and the intensity of the transmitted light is generally equal to or greater than the intensity of the reflected light.
The function of the coupling lens 3 is to focus the light beam, and it may be a single spherical lens or a lens group with optical design.
The photodetector 4 may be an avalanche photodiode, a photodiode, or the like.
As shown in fig. 3, the diameter of the optical probe 7 is usually less than 2mm, a pipe 10 is provided on the peripheral side of the optical probe 7, and the optical probe 7 and the optical fiber sensor 6 are enclosed in the pipe 10. The pipe 10 may be a sleeve or a heat shrinkable tube, and specifically, is wrapped in two ways:
the sleeve is arranged on the periphery of the optical probe 7, the inner diameter of the sleeve is larger than the outer diameter of the optical probe 7, one end of the optical fiber sensor 6, which is provided with the total reflection film, is attached to one end of the optical probe 7, which is used for detection, in parallel, so that the optical probe 7 and the optical fiber sensor 6 are wrapped in the sleeve, and the fixation of the optical probe 7 and the optical fiber sensor 6 is realized.
Or, a heat shrink tube is arranged on the periphery of the optical probe 7, one end of the optical fiber sensor 6, which is provided with the total reflection film, is attached to one end of the optical probe 7, which is used for detection, in parallel, and then the optical probe 7 and the optical fiber sensor 6 are covered by the heat shrink tube.
In either case, the end of the optical fiber sensor 6, at which the optical fiber plug is provided, is remote from the optical probe 7 so as to be connected to the coupling lens 3. The shell can be further integrated in the endoscope host 11 of the existing endoscope system, and the optical fiber sensor 6 is integrated with the optical probe 7, and the middle of the optical fiber sensor and the optical probe is connected and conducted through the optical fiber connector 5, so that the structural change of the existing endoscope system is small, and the research and development design cost is lower.
As shown in fig. 4, the conventional endoscope system includes an optical probe 7 and an endoscope main unit 11, wherein the endoscope main unit 11 is further connected to a computer system 12. As shown in fig. 5, in the present application, the light emitted from the light source 1 can be recorded by the computer system 12 for data such as power thereof, and the computer system 12 can also record data of the photodetector 4, so that when the detected light energy of the photodetector 4 is greatly reduced compared with the light source 1, the computer system 12 can determine that the optical probe 7 is in an immersion state (i.e. a disinfection state or a state of imaging in a human body), otherwise, the optical probe is in an non-immersion state. When the optical probe 7 is in the immersion state, the computer system 12 can be used for recording the time when the light energy is greatly reduced, so that the immersion time is obtained, the disinfection time is usually 30-60 minutes, and the imaging time is usually less than 30 minutes, so that whether the optical probe 7 is in the disinfection state or the imaging use state can be judged according to the immersion time. When the computer system 12 judges that the endoscope is in the imaging use state, various parameters of the endoscope host 11 can be automatically optimized, the image quality and the use experience of medical staff are improved, when the computer judges that the endoscope is in the disinfection state, the current disinfection time is recorded, the disinfection frequency is recorded, the disinfection condition of the optical probe 7 is favorably analyzed, the relation between the performance of the optical probe 7 and the disinfection frequency and time is evaluated, and powerful data support is provided for further improving the production process and the reliability of the optical probe 7 by research and development personnel.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An optical probe for detecting immersion liquid is characterized by comprising an optical probe, a light source, a spectroscope, a coupling lens and an optical fiber sensor, wherein the light source, the spectroscope, the coupling lens and the optical fiber sensor are sequentially arranged along light paths, the spectroscope comprises two light splitting light paths, the optical fiber sensor is positioned on one light splitting light path, and a photoelectric detector is arranged on the other light splitting light path of the spectroscope;
the optical fiber sensor is fixed with the optical probe, the optical fiber sensor is a multimode optical fiber, a fiber core is arranged in the multimode optical fiber, one end, far away from the coupling lens, of the optical fiber sensor is plated with a permeability reducing film, and the refractive index of the permeability reducing film is higher than that of the fiber core.
2. The probe of claim 1, wherein the thickness of the reduced-permeability membrane is 0.01mm to 1 mm.
3. The probe of claim 2, wherein the refractive index of the antireflection film is in the range of 1.6 to 2.5.
4. The probe of claim 1, wherein an end of the fiber optic sensor proximate the coupling lens is configured as a fiber optic plug.
5. The probe of claim 4, further comprising a housing, wherein the light source, beam splitter, coupling lens, and photodetector are secured within the housing.
6. The probe of claim 5, wherein a fiber connector is connected between the housing and the fiber sensor, and light is transmitted between the housing and the fiber sensor through the fiber connector, and the fiber connector receives light focused by the coupling lens at an end close to the coupling lens and is matched with the fiber plug at an end close to the fiber sensor.
7. The probe of claim 1, wherein the light source provides infrared light of a wavelength in the range of 800nm to 2000 nm.
8. The probe of claim 7, wherein the coupling lens is a single spherical lens, or a lens group.
9. The probe of claim 1, wherein a circumference of the optical probe is provided with a conduit, the optical probe and the optical fiber sensor being encased within the conduit.
10. The probe of claim 9, wherein the tubing is a sleeve or a heat shrink tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122552709.0U CN216411073U (en) | 2021-10-22 | 2021-10-22 | Optical probe for detecting immersion liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122552709.0U CN216411073U (en) | 2021-10-22 | 2021-10-22 | Optical probe for detecting immersion liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216411073U true CN216411073U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122552709.0U Active CN216411073U (en) | 2021-10-22 | 2021-10-22 | Optical probe for detecting immersion liquid |
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|---|---|
| CN (1) | CN216411073U (en) |
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2021
- 2021-10-22 CN CN202122552709.0U patent/CN216411073U/en active Active
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