Temperature-measuring medical optical fiber with micro-spherical lens array
By using temperature measurement medical fibers with microspherical lens arrays in medical devices and combining grating sensors to detect temperature changes, traditional electronic sensors solve the problems of low accuracy and harm to human tissue in high-frequency radiation fields, and high-precision and low-damage temperature measurement is achieved.
Patent Information
- Application Number
- CN202421734421.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-22
AI Technical Summary
Traditional electronic sensors in existing medical devices are susceptible to interference in high-frequency radiation or ultrasonic fields, affecting the temperature measurement accuracy, and causing damage to human tissues with a large size.
A temperature measurement medical optical fiber with a microspherical lens array is adopted. A periodic grating and a detection head are arranged through one end of the optical fiber. The microspherical lens array is used to emit a divergent beam, and the temperature changes are detected in combination with the grating sensor to achieve accurate detection of the temperature at the detection head.
Improves the accuracy of temperature measurement, reduces damage to normal tissue, and is less susceptible to interference in high-frequency radiation or ultrasonic fields.
Smart Images
Figure CN222912919U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical device technologies, and in particular to a temperature-measuring medical optical fiber with a micro-spherical lens array. Background Art
[0002] Photodynamic therapy is mainly used for the treatment of malignant tumors clinically, and can effectively apply the photochemical reaction to cell tumors, thereby playing a role in eliminating tumor cells. Currently, the commonly used optical fibers for the treatment of tumors in body cavities are flat-cut optical fibers and lens optical fibers. The lens optical fiber is used more widely. Compared with the flat-cut optical fiber, the divergence angle of the lens optical fiber is larger, which is more conducive to the light beam irradiating more positions in the body cavity. The commonly used lens optical fibers include spherical optical fibers, conical optical fibers, columnar optical fibers, etc.
[0003] Cells in the human body are particularly sensitive to temperature. Therefore, it is generally considered that the suitable temperature for cancer treatment is in the range of 42 - 44 °C, and at this time, normal tissues are not significantly damaged. Since normal cells will also be severely damaged above 45 °C, 45 °C is taken as the safety "limit". How to accurately measure and control the temperature during the in-vivo cancer treatment process without damaging normal tissues requires that the temperature measurement and control during treatment have sufficiently high accuracy.
[0004] In view of the above related technologies, most of the sensors used in medical treatment are traditional electronic sensors, such as thermistors, thermocouples, etc. However, during the treatment process, there are often high-frequency radiations or ultrasonic fields, and electronic sensors are easily interfered by the electromagnetic field, affecting the temperature measurement effect and accuracy. Moreover, the size of traditional sensors is relatively large, so the damage to human tissues is relatively large and it is inconvenient to use. Content of the Utility Model
[0005] In order to facilitate the monitoring of the temperature when the optical fiber works, the present application provides a temperature-measuring medical optical fiber with a micro-spherical lens array.
[0006] The present application provides a temperature-measuring medical optical fiber with a micro-spherical lens array, adopting the following technical solution:
[0007] A temperature-measuring medical optical fiber with a micro-spherical lens array includes an optical fiber. One end of the optical fiber is provided with a periodic grating, and a fiber core connected to the periodic grating is arranged inside the optical fiber. The fiber core and the periodic grating are connected to form a grating sensor for detecting the temperature at the end of the optical fiber. A detection head is arranged at the end of the optical fiber where the periodic grating is opened, and a micro-spherical lens array is evenly arranged on the outer circle of the detection head.
[0008] By adopting the above technical solution, the optical fiber transmits energy to the detection head through part of the fiber core, and the light beam is diverged by the micro-spherical lens array on the detection head. After reflection, the light beam passes through the periodic grating again and is transmitted to the corresponding optical fiber for detection. When the temperature at the detection head changes, it drives the optical fiber to undergo a slight deformation, causing the data of the optical fiber emitted by the micro-spherical lens array to change after passing through the periodic grating, thereby facilitating the detection of the temperature at the detection head.
[0009] Optionally, the diameter of the optical fiber is 100 - 1000 micrometers.
[0010] By adopting the above technical solution, the applicable range of the periodic grating is defined.
[0011] Optionally, a connecting piece is fixedly connected to one end of the optical fiber far away from the detection head, a protective layer is fixedly connected to one end of the connecting piece close to the detection head, and the diameter of the protective layer gradually decreases along the direction from the connecting piece to the detection head.
[0012] By adopting the above technical solution, the connecting piece is used to connect the optical treatment mechanism, and at the same time, the protective layer protects the connection between the optical fiber and the connecting piece, reducing the probability of the optical fiber breaking.
[0013] Optionally, a protective cover is provided on the outside of the detection head. The protective cover is provided with a receiving groove adapted to the detection head. The detection head is located in the receiving groove. The optical fiber is also sleeved with a connecting ring for fixing the protective cover. The connecting ring is located between the protective layer and the detection head, and the optical fiber passes through the connecting ring and is slidably connected to the connecting ring.
[0014] By adopting the above technical solution, the optical fiber positions the protective cover through the connecting ring. When the detection head is located in the receiving groove, the protective cover protects the detection head, reducing the probability of damage to the micro-spherical lens array at the detection head.
[0015] Optionally, the inner diameter of the receiving groove is larger than the outer diameter of the detection head. When the detection head is located in the receiving groove, it does not contact the protective cover. A clamping ring is fixedly connected to one end of the connecting ring close to the protective cover. The clamping ring is made of an elastic material. The protective cover is provided with an annular groove communicated with the receiving groove. When the clamping ring is located in the annular groove, it fits with the inner wall of the annular groove.
[0016] By adopting the above technical solution, the connecting ring supports and positions the protective cover through the cooperation of the clamping ring and the annular groove, thereby preventing the protective cover from contacting the detection head, which is beneficial to reducing the probability of the protective cover extruding the detection head under the action of external force.
[0017] Optionally, an avoidance groove is provided on one side of the connecting ring close to the optical fiber. When the connecting ring is connected to the protective cover, the avoidance groove is aligned with the periodic grating.
[0018] By adopting the above technical solution, the connecting ring avoids the periodic grating through the avoidance groove, thereby reducing the probability that the connecting ring touches the side of the periodic grating and causes deformation of the periodic grating.
[0019] Optionally, a notch is opened on one side of the connecting ring. The notch penetrates the connecting ring along the axial direction of the connecting ring. A connecting edge is fixedly connected along the side edge of the notch. The connecting edge is located on the side of the connecting ring close to the protective layer. Openings are provided on one side of the two connecting edges close to each other.
[0020] By adopting the above technical solution, the opening is beneficial to improving the convenience when separating the two connecting edges. When moving the connecting edge, the connecting edge drives the connecting edge to unfold, thereby facilitating the separation of the connecting ring from the outside of the optical fiber.
[0021] Optionally, an anti-slip sleeve is fixedly connected to the side of the connecting ring close to the protective layer. An elastic ring is provided on the outer side of the anti-slip sleeve, and the elastic ring drives the anti-slip sleeve to squeeze the optical fiber.
[0022] By adopting the above technical solution, the elastic ring drives the anti-slip sleeve to fit the outer circle of the optical fiber, thereby reducing the probability that the connecting ring displaces along the optical fiber.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] The optical fiber transmits energy to the detection head through part of the fiber core, and the light beam is diverged by the micro-spherical lens array on the detection head. After reflection, the light beam passes through the periodic grating again and is transmitted to the corresponding optical fiber and detected. When the temperature at the detection head changes, it drives the optical fiber to undergo a small deformation, causing the data of the optical fiber emitted by the micro-spherical lens array passing through the periodic grating to change, thereby facilitating the detection of the temperature at the detection head;
[0025] The optical fiber positions the shield through the connecting ring. When the detection head is located in the accommodation groove, the detection head is protected by the shield, reducing the probability of damage to the micro-spherical lens array at the detection head;
[0026] The connecting ring supports and positions the shield through the cooperation of the snap ring and the annular groove, thereby preventing the shield from contacting the detection head, which is beneficial to reducing the probability that the shield squeezes the detection head under the action of external force. Description of the Drawings
[0027] Figure 1 is the overall structural schematic diagram of Embodiment 1.
[0028] Figure 2 is the schematic diagram of the light output energy distribution diagram of the spherical lens optical fiber.
[0029] Figure 3 is the schematic diagram of the light output energy distribution diagram of the spherical micro-lens array optical fiber.
[0030] Figure 4 It is a schematic diagram of the overall structure of Embodiment 2.
[0031] Figure 5 It is a schematic diagram designed to highlight the connection ring structure.
[0032] Explanation of reference numerals: 1. Optical fiber; 11. Periodic grating; 12. Detection head; 13. Micro-spherical lens array; 14. Connector; 15. Protective layer; 2. Shield; 21. Accommodating groove; 22. Annular groove; 3. Connection ring; 31. Snap ring; 32. Avoidance groove; 33. Notch; 34. Connection edge; 341. Opening; 35. Anti-slip sleeve; 36. Elastic ring. Specific implementation manners
[0033] The following further elaborates on the present application in conjunction with all the attached drawings.
[0034] An embodiment of the present application discloses a temperature-measuring medical optical fiber with a micro-spherical lens array. Embodiment 1
[0035] Referring to Figure 1 , a temperature-measuring medical optical fiber with a micro-spherical lens array includes an optical fiber 1, the diameter of the optical fiber 1 can be selected from 100 - 1000 microns, and in this embodiment, 600 microns is taken as an example for illustration. One end of the optical fiber 1 is provided with a detection head 12, and a micro-spherical lens array 13 is evenly arranged outside the detection head 12. A periodic grating 11 is provided at one end of the optical fiber 1 close to the detection head 12, and the periodic grating 11 is connected to the core to jointly form a grating sensor.
[0036] Referring to Figure 1 , in combination with Figure 2 and Figure 3 , when using an optical fiber 1 with a diameter of 600 microns and selecting a spherical lens with a diameter of 800 microns, the light-emitting divergence angle of the optical fiber 1 is 70 degrees, and the uniformity of the light spot is about 60%. Further, the diameter of the micro-spherical lens array 13 in this embodiment is 10 microns. When the diameter of the optical fiber 1 is 600 microns, after passing through the micro-spherical lens array 13, the light-emitting divergence angle increases to more than 90 degrees, and the uniformity of the light spot is greater than 80%.
[0037] Referring to Figure 1 , at the other end of the optical fiber 1, a connector 14 is fixedly connected. One end of the connector 14 close to the detection head 12 is provided with a protective layer 15, and its diameter gradually decreases along the direction from the connector 14 to the detection head 12 to adapt to optical fibers 1 with different diameters and at the same time reduce the probability of the optical fiber 1 breaking.
[0038] The implementation principle of Embodiment 1 of this application is as follows: The light beam diverged by the micro-spherical lens array 13 passes through the periodic grating 11 again after reflection and is detected by the grating sensor at the detection head 12. When the temperature at the detection head 12 changes, it will cause a slight deformation of the optical fiber 1, resulting in a change in the data of the light beam emitted by the micro-spherical lens array 13 after passing through the periodic grating 11, thereby achieving accurate temperature detection. Embodiment 2
[0039] Referring to Figure 4 and Figure 5 This embodiment is different from Embodiment 1 in that: A protective cover 2 is provided outside the detection head 12. An accommodation groove 21 adapted to the detection head 12 is provided on the protective cover 2. The detection head 12 is located in the accommodation groove 21, and a connecting ring 3 is sleeved on the optical fiber 1. The connecting ring 3 is located between the protective layer 15 and the detection head 12, and the optical fiber 1 is slidably connected to the connecting ring 3. A clamping ring 31 is fixedly connected to one end of the connecting ring 3 close to the protective cover 2. The clamping ring 31 is made of an elastic material. An annular groove 22 adapted to the clamping ring 31 is provided on the inner side of the protective cover 2. When the clamping ring 31 is located in the annular groove 22, the connecting ring 3 supports the protective cover 2. At this time, the detection head 12 and the arc-shaped inner wall do not contact each other, thereby realizing non-contact protection of the protective cover 2 and the detection head 12, and effectively preventing the protective cover 2 from squeezing the detection head 12.
[0040] Referring to Figure 4 and Figure 5 On one side of the connecting ring 3 close to the optical fiber 1, an avoidance groove 32 is provided to avoid the periodic grating 11, reduce the contact of the connecting ring 3 with the grating, and reduce the risk of grating deformation. A notch 33 is also provided on one side of the connecting ring 3. The notch 33 penetrates through the connecting ring 3. A connecting edge 34 is fixedly connected along the side of the notch 33. An opening 341 is provided on the side of the connecting edges 34 close to each other. When the connecting ring 3 needs to be disassembled, the opening 341 separates the two connecting edges 34, and then drives the connecting ring 3 to expand through the connecting edges 34, facilitating the separation and operation of the connecting ring 3. A non-slip sleeve 35 is fixedly connected to one side of the connecting ring 3 close to the protective layer 15. An elastic ring 36 is provided on the outer side of the non-slip sleeve 35. The elastic ring 36 drives the non-slip sleeve 35 to squeeze the optical fiber 1, increasing the friction between the connecting ring 3 and the optical fiber 1 and preventing the connecting ring 3 from displacing along the optical fiber 1.
[0041] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. A temperature measuring medical optical fiber with a micro-spherical lens array, comprising an optical fiber (1), characterized in that: A periodic grating (11) is provided at one end of the optical fiber (1), a fiber core connected to the periodic grating (11) is provided in the optical fiber (1), the fiber core and the periodic grating (11) are connected to form a grating sensor, the grating sensor is used to detect the temperature of the end of the optical fiber (1), a detection head (12) is provided at the end of the optical fiber (1) where the periodic grating (11) is provided, and a micro-spherical lens array (13) is evenly arranged at the outer circumference of the detection head (12).
2. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 1, characterized in that: The optical fiber (1) has a diameter of 100-1000 microns.
3. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 1, characterized in that: The end of the optical fiber (1) away from the detection head (12) is fixedly connected to a connector (14), and the end of the connector (14) close to the detection head (12) is fixedly connected to a protective layer (15), and the diameter of the protective layer (15) gradually decreases in the direction from the connector (14) to the detection head (12).
4. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 3, characterized in that: A protective cover (2) is provided on the outside of the detection head (12); the protective cover (2) is provided with a receiving groove (21) adapted to the detection head (12); the detection head (12) is located in the receiving groove (21); the optical fiber (1) is also sleeved with a connecting ring (3) for fixing the protective cover (2); the connecting ring (3) is located between the protective layer (15) and the detection head (12); the optical fiber (1) passes through the connecting ring (3) and is slidably connected to the connecting ring (3).
5. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 4, characterized in that: The inner diameter of the receiving groove (21) is larger than the outer diameter of the detection head (12); when the detection head (12) is located in the receiving groove (21), it does not contact the shield (2); one end of the connecting ring (3) close to the shield (2) is fixedly connected with a snap ring (31); the snap ring (31) is made of elastic material; the shield (2) is provided with an annular groove (22) connected with the receiving groove (21); when the snap ring (31) is located in the annular groove (22), it fits with the inner wall of the annular groove (22).
6. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 4, characterized in that: A side of the connecting ring (3) close to the optical fiber (1) is provided with an avoidance groove (32); when the connecting ring (3) is connected to the protective cover (2), the avoidance groove (32) is directly opposite to the periodic grating (11).
7. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 4, characterized in that: A cutout (33) is opened on one side of the connecting ring (3), and the cutout (33) penetrates the connecting ring (3) axially along the connecting ring (3). The connecting ring (3) is fixedly connected with a connecting edge (34) along the side of the cutout (33), and the connecting edge (34) is located on a side of the connecting ring (3) close to the protective layer (15), and openings (341) are provided on the sides of the two connecting edges (34) close to each other.
8. The temperature measuring medical optical fiber with a micro-spherical lens array according to claim 4, characterized in that: An anti-slip sleeve (35) is fixedly connected to one side of the connection ring (3) close to the protective layer (15), and an elastic ring (36) is arranged outside the anti-slip sleeve (35). The elastic ring (36) drives the anti-slip sleeve (35) to be squeezed toward the optical fiber (1).