Optical measuring device and monitoring apparatus

Abstract

The utility model discloses an optical measuring device and monitoring equipment. Optical measuring device includes optical path module subassembly box, and optical path module subassembly box includes light source coupling subassembly, multicore optical fiber, power monitoring spare and external optical fiber coupling subassembly, one end of multicore optical fiber is light source coupling end, and the branch of other end is monitoring end and external optical fiber coupling end, light source coupling subassembly is used to make the light beam that a plurality of different wavelength's light source emits enter light source coupling end through optical device coupling, external optical fiber coupling end with external optical fiber coupling subassembly is connected, and monitoring end with power monitoring spare is connected. The above-mentioned optical measuring device can achieve simple assembly and higher consistency.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to an optical measuring device and a monitoring device. Background Technology

[0002] In related technologies, monitoring equipment includes a blood oxygenation measurement system that measures blood oxygen saturation. The blood oxygenation measurement system comprises an optical path module assembly box and an external measurement fiber optic module. The monitoring instrument uses the optical path module assembly box to couple a specific wavelength light beam through a series of optical devices into the external measurement fiber optic module. After entering the bloodstream, the reflected fiber energy is returned to the optical path module assembly box via the external measurement fiber optic module, converted into an electrical signal, and fed back to the internal system of the monitoring equipment to calculate the specific parameters of mixed venous blood oxygen saturation.

[0003] Currently, the optical path module assembly box mainly uses optical fiber 1 to couple the light from the light source into an external optical fiber via a collimator. Simultaneously, an optical fiber 2 for receiving reflected light needs to be inserted at the coupling surface of the collimator. Optical fiber 2 is connected to an optical receiver for monitoring the output power of the light source. However, since both optical fibers 1 and 2 are large-core plastic optical fibers (core diameter > 500µm), they need to be concentrated at the receiving surface of collimator 2, resulting in the two fibers having to be placed side-by-side, reducing the coupling efficiency of collimator 2. Furthermore, optical fiber 2 receives only a portion of the reflected light from optical fiber 1 at the collimator interface, leading to lower efficiency and instability. Utility Model Content

[0004] This utility model provides an optical measuring device and a monitoring device to solve at least one of the above-mentioned technical problems.

[0005] This utility model provides an optical measurement device for blood oxygen saturation, used in monitoring equipment. The optical measurement device includes an optical path module assembly box, which includes a light source coupling assembly, a multi-core optical fiber, a power monitoring device, and an external optical fiber coupling assembly. One end of the multi-core optical fiber is a light source coupling end, and the other end branches into a monitoring end and an external optical fiber coupling end; The light source coupling assembly is used to couple light beams emitted by various light sources of different wavelengths into the light source coupling end through optical devices. The external optical fiber coupling end is connected to the external optical fiber coupling assembly, and the monitoring end is connected to the power monitoring device.

[0006] In the aforementioned optical measurement device, a multi-core optical fiber can split the light beam from the light source coupling assembly into two beams, one entering the monitoring end and the other the external optical fiber coupling end. These two beams can be output to the power monitoring device and the external optical fiber coupling assembly, respectively. The use of multi-core optical fiber avoids the defects of using large-diameter optical fibers side by side on the coupling end face, which can cause the coupling surface to be out of axis. It can guide light into the symmetrical and parallel coupling end face at a fixed incident angle, which greatly improves the coupling efficiency. Moreover, by using a fixed ratio of optical fiber cores, the ratio of the beam entering the monitoring end can be fixed, which can achieve simple assembly and high consistency.

[0007] In some embodiments, the light source coupling assembly includes at least one light output terminal, and the number of light source coupling terminals is equal to the number of light output terminals.

[0008] In some embodiments, the light source coupling assembly includes a first light source and a second light source, and the optical device includes a beam splitter and a first lens group. The beam splitter is used to reflect a first light beam emitted by the first light source into the first lens group and to transmit a second light beam emitted by the second light source into the first lens group. The first lens group is used to couple the first beam and the second beam into the coupling end of the light source.

[0009] In some embodiments, the optical detection device includes a control component electrically connected to the power monitoring device and an electrical connection to the light source coupling component. The control component is used to receive a power signal output by the power monitoring device and adjust the output power of the light source according to the power signal and a preset power.

[0010] In some embodiments, the external fiber coupling assembly includes a second lens group for adjusting the area of ​​the light spot output by the external fiber coupling assembly to be equal to the cross-sectional area of ​​the external fiber.

[0011] In some embodiments, the external fiber optic coupling assembly further includes an optical receiver for receiving a reflected beam transmitted through the external fiber and outputting an electrical signal based on the reflected beam, wherein the reflected beam is formed by the measurement sample reflecting the beam output by the external fiber optic coupling assembly.

[0012] In some embodiments, the splitting ratio of the external optical fiber coupling end is K1, and the splitting ratio of the monitoring end is K2, where K1:K2 is greater than 1.

[0013] In some embodiments, the incident beam half-width angle of the multi-core optical fiber is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.966. The beam half-width angle of the emitted light from the multi-core optical fiber is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.966.

[0014] In some embodiments, the optical measuring device includes a first connector, a second connector, and a third connector, wherein the first connector is located at the light source coupling end, the second connector is located at the monitoring end, and the third connector is located at the external optical fiber coupling end; The light source coupling assembly is connected to the light source coupling end through the first connector, the power monitoring device is connected to the monitoring end through the second connector, and the external optical fiber coupling assembly is connected to the external optical fiber coupling end through the third connector; The first lens group of the optical device includes a first convex lens, which includes an incident light surface and an exit light surface facing away from each other. The incident light surface is convex, and the exit light surface is planar. The incident light surface faces the beam splitter of the optical device. The second lens group of the external fiber coupling assembly includes a second convex lens and a third convex lens. Both the second and third convex lenses include a convex surface and a plane. Along the direction away from the external fiber coupling end, the second and third convex lenses are arranged in sequence. The optical axis of the second convex lens coincides with the optical axis of the third convex lens. The plane of the second convex lens faces the external fiber coupling end. The convex surface of the second convex lens is opposite to the convex surface of the third convex lens. The plane of the third convex lens faces the external fiber.

[0015] The monitoring device provided by this utility model includes the optical measuring device of any of the above embodiments.

[0016] In the aforementioned monitoring equipment, multi-core optical fibers can split the light beam from the light source coupling assembly into two beams, one entering the monitoring end and the other the external optical fiber coupling end. These two beams can be output to the power monitoring device and the external optical fiber coupling assembly, respectively. The use of multi-core optical fibers avoids the defects of using large-core fibers side by side on the coupling end face, which can cause the coupling surface to be out of axis. It can guide light into the symmetrical and parallel coupling end face at a fixed incident angle, which greatly improves the coupling efficiency. Moreover, by using a fixed ratio of fiber cores, the ratio of the beam entering the monitoring end can be fixed, which can achieve simple assembly and high consistency.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the optical measuring device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the optical measuring device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the multi-core optical fiber and the connector according to an embodiment of the present invention.

[0020] Explanation of key component reference numerals: Optical measuring device 100, optical path module assembly box 12, light source coupling assembly 14, multi-core optical fiber 16, power monitoring component 18, external optical fiber coupling assembly 20, light source coupling end 22, monitoring end 24, external optical fiber coupling end 26, first light source 28, second light source 30, beam splitter 32, first lens group 34, first convex lens 36, control component 38, second lens group 40, second convex lens 42, third convex lens 44, light receiver 46, first connector 48, second connector 50, third connector 52, first external optical fiber 200, second external optical fiber 201. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] Please refer to Figure 1 This utility model provides an optical measurement device 100 for blood oxygen saturation monitoring equipment. The optical measurement device 100 includes an optical path module assembly box 12, which includes a light source coupling assembly 14, a multi-core optical fiber 16, a power monitoring component 18, and an external optical fiber coupling assembly 20.

[0027] One end of the multi-core optical fiber 16 is a light source coupling end 22, and the other end branches into a monitoring end 24 and an external optical fiber coupling end 26. The light source coupling assembly 14 is used to couple light beams emitted by various light sources of different wavelengths into the light source coupling end 22 through optical devices. The external optical fiber coupling end 26 is connected to the external optical fiber coupling assembly 20, and the monitoring end 24 is connected to the power monitoring device 18.

[0028] In the aforementioned optical measurement device 100, the multi-core optical fiber 16 can split the light beam output from the light source coupling assembly 14 into two beams, one entering the monitoring end 24 and the other entering the external optical fiber coupling end 26. These two beams can be output to the power monitoring component 18 and the external optical fiber coupling assembly 20, respectively. The use of the multi-core optical fiber 16 avoids the defects of using large-diameter optical fibers side by side on the coupling end face, which causes the coupling surface to be out of axis. It can guide the light into the symmetrical and parallel coupling end face at a fixed incident angle, which greatly improves the coupling efficiency. Moreover, by using a fixed ratio of optical fiber cores, the ratio of the beam entering the monitoring end 24 can be fixed, which can achieve simple assembly and high consistency.

[0029] Specifically, the optical measuring device 100 can be applied to monitoring equipment, one of the functions of which is the measurement of blood oxygen saturation (such as mixed venous oxygen saturation). Mixed venous oxygen saturation can refer to the oxygen saturation of pulmonary artery blood, which can dynamically reflect changes in oxygen balance and tissue hypoxia.

[0030] The monitoring equipment also includes a main unit, and the optical measuring device 100 can be fixedly mounted on or detachably mounted on the main unit. The optical measuring device 100 includes an optical path module assembly box 12, which mainly realizes the emission, monitoring and reception of light beams.

[0031] Multicore fiber (MCF) is an optical fiber containing multiple independent cores within a common cladding. This invention does not limit the number of cores; in some examples, the multicore fiber 16 may contain 2, 7, 19, or other cores. Optionally, the multicore fiber 16 can be a multicore plastic optical fiber, which is made of polymers (such as polymethyl methacrylate, PMMA). Optionally, the multicore fiber 16 can also be a multicore glass optical fiber. Multicore glass optical fiber can be composed of multiple small-diameter (50µm) glass fiber filaments (cores), allowing for flexible branching of the fiber filaments into multiple pathways according to a specified number of cores. Furthermore, the output beam angle at the fiber port can be controlled by adjusting the fiber material.

[0032] One end of the multi-core optical fiber 16 is a light source coupling end 22, which can serve as an incident end to receive the light beam emitted by the light source coupling assembly 14. The other end of the multi-core optical fiber 16 is divided into two branches: one branch is a monitoring end 24, and the other branch is an external optical fiber coupling end 26.

[0033] The monitoring terminal 24 is connected to the power monitoring device 18, enabling the power monitoring device 18 to receive the emitted light beam output from the monitoring terminal 24. The power monitoring device 18 can output an electrical signal that characterizes the power of the emitted light beam, thereby enabling power monitoring of the light beam emitted by the light source coupling assembly 14. The power monitoring device 18 includes, but is not limited to, a photodiode.

[0034] The external fiber optic coupling end 26 is connected to the external fiber optic coupling assembly 20, allowing the external fiber optic coupling assembly 20 to receive the emitted light beam from the external fiber optic coupling end 26. The external fiber optic coupling assembly 20 can couple the received light beam to the external fiber optic cable, which then transmits the light beam to the measurement sample. Please refer to... Figure 1 The external optical fiber that transmits the emitted beam can be the first external optical fiber 200.

[0035] The light source coupling assembly 14 may include multiple light sources and optical devices. The multiple light sources emit light of different wavelengths, thereby enabling more effective measurement of blood oxygen saturation. The optical devices can couple the light beams emitted by multiple light sources of different wavelengths into the light source coupling end 22 of the multi-core optical fiber 16. The optical devices include, but are not limited to, beam splitters, lenses, etc. The light sources include, but are not limited to, light-emitting diodes (LEDs).

[0036] The coupling mentioned in this invention can refer to the process of efficiently transmitting a light beam from one medium to another, which is called optical coupling.

[0037] This invention uses a multi-core optical fiber 16 as the beam transmission medium. The fiber filaments inside the multi-core optical fiber 16 are uniformly distributed, and the beam collected at the light source coupling end 22 of the multi-core optical fiber 16 is evenly distributed to two branch interfaces: the external optical fiber coupling end 26 and the monitoring end 24. Optionally, the number of fiber filaments in each branch can be fixed, and the beam energy to be allocated to each interface can be directionally distributed.

[0038] In related technologies, collecting the reflected light from the interface of the external fiber optic coupling end through a plastic optical fiber and then feeding it into the light source power measurement interface not only affects the coupling efficiency of the external fiber optic coupling end but also causes significant consistency deviations in the measuring instruments. This invention not only allows the light beam from the light source to be efficiently coupled into the matching first external optical fiber 200 with a smaller aperture by connecting it to the external fiber optic coupling assembly 20 at a fixed angle, but also orients the light beam from the light source coupling end 22 and proportionally distributes it to the monitoring end 24 for power monitoring of the light source output, maintaining consistency deviations among the various optical path module component boxes 12.

[0039] Optionally, each interface of the multi-core fiber 16 is equipped with a metal connector of a fixed size, which makes it easier to design the structure of the coupling end, facilitates production and assembly, and improves the stability of the product after use.

[0040] In some implementations, please refer to Figure 1 The light source coupling component 14 includes at least one light output terminal, and the number of light source coupling terminals 22 is equal to the number of light output terminals.

[0041] Therefore, it can be adapted to different light source coupling component 14 structures to meet the needs of multiple scenarios.

[0042] Specifically, in one implementation, please refer to... Figure 1 The light source coupling assembly 14 includes a light output end, and the multi-core optical fiber 16 includes a light source coupling end 22. The emitted light beam output from the light source coupling assembly 14 can be output from the light output end and coupled into the multi-core optical fiber 16 through the light source coupling end 22.

[0043] In one embodiment, in an access scheme compatible with multiple light sources, there may be two light sources corresponding to one optical output end and one light source coupling end 22. In one embodiment, a multi-core optical fiber 16 can be used, with one end of the multi-core optical fiber 16 split to form multiple light source coupling ends 22, each receiving a beam of light output from a corresponding optical output end. In one embodiment, multiple multi-core optical fibers 16 can be used, with one end of each multi-core optical fiber 16 forming a light source coupling end 22, or one or more ends of the multi-core optical fibers 16 forming a light source coupling end 22, and one or more ends of the multi-core optical fibers split to form multiple light source coupling ends 22, each receiving a beam of light output from a corresponding optical output end.

[0044] In some implementations, please refer to Figure 1 The light source coupling assembly 14 includes a first light source 28 and a second light source 30. The optical device includes a beam splitter 32 and a first lens group 34. The beam splitter 32 is used to reflect the first light beam emitted by the first light source 28 into the first lens group 34 and to transmit the second light beam emitted by the second light source 30 into the first lens group 34. The first lens group 34 is used to couple the first beam and the second beam into the light source coupling end 22.

[0045] Therefore, the structure of the light source coupling component 14 is simple and the cost is low.

[0046] Optionally, both the first light source 28 and the second light source 30 can be light-emitting diodes (LEDs).

[0047] Beam splitter 32 is located at the intersection of the output optical path of the first light source 28 and the output optical path of the second light source 30. The first beam emitted by the first light source 28 is incident on beam splitter 32 and reflected by beam splitter 32 into the first lens group 34. The second beam emitted by the second light source 30 is incident on beam splitter 32 and transmitted through beam splitter 32 into the first lens group 34. Optionally, the first beam reflected by beam splitter 32 coincides with the second beam transmitted through beam splitter 32, which can improve coupling efficiency.

[0048] The first lens group 34 can couple the first beam and the second beam into the light source coupling end 22. Figure 1 In this design, the first lens group 34 includes a first convex lens 36. The first convex lens 36 has an incident light surface and an exit light surface facing away from each other. The incident light surface is convex, and the exit light surface is planar. The incident light surface faces the beam splitter 32. Therefore, the first lens group 34 has a simple structure and low cost. It is understood that the configuration of the first lens group 34 is not limited to a convex lens, but can also be other types of lenses. The number of lenses included in the first lens group 34 is not limited to one, but can also be two or more, and this utility model does not impose any limitation.

[0049] In some implementations, please refer to Figure 1 and Figure 2 The optical measurement device 100 includes a control component 38, which is electrically connected to a power monitoring component 18 and to a light source coupled to a light source coupling component 14. The control component 38 is used to receive the power signal output by the power monitoring component 18 and adjust the output power of the light source according to the power signal and a preset power.

[0050] Therefore, the power of the light source can be adjusted to meet the requirements.

[0051] Specifically, the power monitoring device 18 can receive the light beam output from the monitoring end 24 and output a corresponding power signal. The control component 38 can be electrically connected to the power monitoring device 18 to receive the power signal output by the power monitoring device 18. The control component 38 can be electrically connected to the light source of the light source coupling component 14 to control the output power of the light source.

[0052] The preset power can be a pre-calibrated or pre-set and stored power, which can be specifically limited according to measurement requirements. During the use of the optical measuring device 100, changes in ambient temperature, attenuation of the light source, and changes in the assembly structure of the optical measuring device 100 may cause instability in the output power of the light source, causing the output power of the light source to deviate from the preset power.

[0053] The control component 38 can acquire the power of the emitted light from the light source coupling component 14 through the power monitoring component 18 and compare the power of the emitted light from the light source coupling component 14 with a preset power. When the power of the emitted light from the light source coupling component 14 is equal to or the difference between them is within a set range, the control component 38 can maintain the current output power of the light source. When the difference between the power of the emitted light from the light source coupling component 14 and the preset power is outside the set range, the control component 38 can adjust the current output power of the light source so that the current output power of the light source is equal to or the difference between them is within the set range. The set range can be specifically set according to actual needs, and this utility model does not limit it.

[0054] Optionally, the control component 38 can adjust the output power of the light source by adjusting parameters such as the current and voltage of the light source. Figure 2 In this process, the control component 38 can control the output power of at least one of the first light source 28 and the second light source 30.

[0055] In some implementations, please refer to Figure 1 The external fiber optic coupling assembly 20 includes a second lens group 40, which is used to adjust the area of ​​the light spot output by the external fiber optic coupling assembly 20 to be equal to the cross-sectional area of ​​the external fiber optic cable.

[0056] This allows for efficient coupling of the light beam into the matching external optical fiber.

[0057] Alternatively, in one implementation, please combine Figure 1 The second lens group 40 includes a second convex lens 42 and a third convex lens 44. Both the second convex lens 42 and the third convex lens 44 include a convex surface and a flat surface. Along a direction away from the external fiber coupling end 26, the second convex lens 42 and the third convex lens 44 are arranged sequentially, with the optical axis of the second convex lens 42 coinciding with the optical axis of the third convex lens 44. The flat surface of the second convex lens 42 faces the external fiber coupling end 26 of the multi-core optical fiber 16, and the convex surface of the second convex lens 42 is opposite to the convex surface of the third convex lens 44. The flat surface of the third convex lens 44 faces the first external optical fiber 200. Thus, the second lens group 40 can shape the light spot with a simple structure. It is understood that in other embodiments, the configuration of the second lens group 40 is not limited to convex lenses, but can also be other types of lenses. The second lens group 40 may include one, three, or more lenses.

[0058] Since the beam output from the external fiber coupling end 26 is a geometrically symmetrical cylindrical beam, the resulting light spot is a geometrically symmetrical circular light spot. The first external fiber 200 is a geometrically symmetrical cylinder with a geometrically symmetrical circular cross-section. The second lens group 40 is used to adjust the area of ​​the light spot output from the external fiber coupling component 20 to be equal to the cross-sectional area of ​​the first external fiber 200, so that the circular beam output from the external fiber coupling component 20 can be efficiently coupled into the matching first external fiber 200 with a smaller aperture.

[0059] In some implementations, please refer to Figure 1 The external fiber optic coupling assembly 20 also includes an optical receiver 46, which is used to receive the reflected beam transmitted by the external fiber optic cable and output an electrical signal according to the reflected beam. The reflected beam is formed by the measurement sample reflecting the beam output by the external fiber optic coupling assembly 20.

[0060] This allows for the detection of the measured samples, thus meeting measurement requirements.

[0061] Specifically, please combine Figure 1The external optical fiber transmitting the reflected light beam can be a second external optical fiber 201. In one embodiment, the measurement sample is a mixed vein. The external optical fiber coupling assembly 20 can couple the light beam output from the external optical fiber coupling end 26 into the first external optical fiber 200. The other end of the first external optical fiber 200 can face the measurement sample. The light beam (hereinafter referred to as the measurement beam) is emitted from the other end of the first external optical fiber 200 and illuminates the measurement sample, which can reflect the measurement beam. Optionally, the reflected measurement beam can be received by the second external optical fiber 201 and transmitted to the optical input end of the optical receiver 46.

[0062] The optical receiver 46 can output a corresponding electrical signal based on the reflected measurement beam. This electrical signal can be input to the control component 38 or other control components, which will then calculate the specific parameters of the mixed venous oxygen saturation. The optical receiver 46 may include, but is not limited to, a photodiode.

[0063] In some implementations, the splitting ratio of the external fiber coupling end 26 is K1, and the splitting ratio of the monitoring end 24 is K2, where K1:K2 is greater than 1.

[0064] This ensures, to a certain extent, the energy of the beam used to measure the sample, thus improving the accuracy of the measurement.

[0065] Specifically, the end of the multi-core optical fiber 16 furthest from the light source coupling assembly 14 can branch to form an external optical fiber coupling end 26 and a monitoring end 24. The number of optical fibers contained in the external optical fiber coupling end 26 and the monitoring end 24 can be related to the beam splitting ratio. The beam splitting ratio of the external optical fiber coupling end 26 and the monitoring end 24 can be adjusted by adjusting the number of optical fibers contained in the external optical fiber coupling end 26 and the monitoring end 24.

[0066] Since the beam emitted from the external fiber coupling end 26 is used to measure the sample, in order to ensure the energy of the beam used to measure the sample to a certain extent and improve the accuracy of the measurement, the splitting ratio K1 of the external fiber coupling end 26 is greater than the splitting ratio K2 of the monitoring end 24, that is, K1:K2 is greater than 1.

[0067] In some implementations, K1:K2 = 0.95:0.05, 0.9:0.1, or 0.85:0.15.

[0068] Therefore, you can choose flexibly according to your needs.

[0069] In one embodiment, K1:K2=0.95:0.05, that is, of the beam energy output by the light source coupling component 14, 95% is used to output to the first external optical fiber 200 via the external optical fiber coupling end 26, and 5% is used to output to the power monitoring component 18 via the monitoring end 24.

[0070] In one embodiment, K1:K2=0.9:0.1, that is, of the beam energy output by the light source coupling component 14, 90% is used to output to the first external optical fiber 200 via the external optical fiber coupling end 26, and 10% is used to output to the power monitoring component 18 via the monitoring end 24.

[0071] In one embodiment, K1:K2=0.85:0.15, that is, of the beam energy output by the light source coupling component 14, 85% is used to output to the first external optical fiber 200 via the external optical fiber coupling end 26, and 15% is used to output to the power monitoring component 18 via the monitoring end 24.

[0072] It is understood that in other implementations, K1:K2 can be other values, and are not limited to the values ​​mentioned above.

[0073] In some embodiments, the incident beam half-width angle of the multi-core fiber 16 is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.966. The beam half-width angle of the multi-core fiber 16 is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.966.

[0074] Therefore, the parameters of the multi-core fiber 16 meet the requirements, which is beneficial to improving the measurement accuracy.

[0075] Specifically, one end of the multi-core optical fiber 16 is a light source coupling end 22, which can serve as an incident end. The half-width angle of the incident light beam at the incident end is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.966, making the light source coupling end 22 of the multi-core optical fiber 16 compatible with most light source coupling components 14. The light beam output from the light source coupling component 14 can be efficiently coupled into the light source coupling end 22 of the multi-core optical fiber 16.

[0076] The incident beam half-width angle is θ1, 30°≤θ1≤75°, corresponding to a numerical aperture NA1, 0.5≤NA1≤0.966. In some examples, θ1 = 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, or other angles greater than or equal to 30° and less than or equal to 75°. NA1 = 0.5, 0.6, 0.7, 0.8, 0.9, 0.95, 0.966, or other values ​​greater than or equal to 0.5 and less than or equal to 0.966.

[0077] The other end of the multi-core optical fiber 16 branches into a monitoring end 24 and an external optical fiber coupling end 26, which can serve as output ends. The half-width angle of the emitted light from the output end is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.966. This allows the monitoring end 24 of the multi-core optical fiber 16 to be used with most power monitoring devices 18, and the external optical fiber coupling end 26 to be used with most of the first external optical fibers 200. The beam output from the monitoring end 24 can be efficiently coupled into the power monitoring device 18, and the beam output from the external optical fiber coupling end 26 can be efficiently coupled into the first external optical fiber 200.

[0078] The half-width angle of the emitted beam is θ2, where 30° ≤ θ2 ≤ 75°, corresponding to a numerical aperture of NA2, where 0.5 ≤ NA2 ≤ 0.966. In some examples, θ2 = 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, or other angles greater than or equal to 30° and less than or equal to 75°. NA2 = 0.5, 0.6, 0.7, 0.8, 0.9, 0.95, 0.966, or other values ​​greater than or equal to 0.5 and less than or equal to 0.966. Optionally, θ2 = θ1, and NA2 = NA1.

[0079] In some implementations, please refer to Figure 1 and Figure 2 The optical measurement device 100 includes a first connector 48, a second connector 50 and a third connector 52. The first connector 48 is located at the light source coupling end 22, the second connector 50 is located at the monitoring end 24, and the third connector 52 is located at the external optical fiber coupling end 26.

[0080] The light source coupling assembly 14 is connected to the light source coupling end 22 through the first connector 48, the power monitoring component 18 is connected to the monitoring end 24 through the second connector 50, and the external optical fiber coupling assembly 20 is connected to the external optical fiber coupling end 26 through the third connector 52.

[0081] This makes the structural assembly of the light source coupling end 22, the monitoring end 24, and the external optical fiber coupling end 26 more stable and simple, reducing the consistency deviation of each component.

[0082] Specifically, the light source coupling assembly 14 may include a connection structure that mates with the first connector 48. The light source coupling end 22 may be pre-assembled with the first connector 48. During assembly, the first connector 48 with one end containing the multi-core optical fiber 16 is mated with the connection structure of the light source coupling assembly 14, thereby achieving the mating of the light source coupling assembly 14 and the light source coupling end 22.

[0083] The power monitoring component 18 may include a connection structure that mates with the second connector 50. The monitoring end 24 may be pre-assembled with the second connector 50. During assembly, the second connector 50 with one end containing the multi-core optical fiber 16 is mated with the connection structure of the power monitoring component 18, thereby achieving the connection between the power monitoring component 18 and the monitoring end 24.

[0084] The external fiber optic coupling assembly 20 may include a connection structure that mates with the third connector 52. The external fiber optic coupling end 26 may be pre-assembled with the third connector 52. During assembly, the third connector 52 with one end containing the multi-core fiber 16 is mated with the connection structure of the external fiber optic coupling assembly 20, thereby achieving the mating of the external fiber optic coupling assembly 20 and the external fiber optic coupling end 26.

[0085] Optionally, the first connector 48, the second connector 50, and the third connector 52 are all metal connectors, and the size of the metal connectors can be fixed.

[0086] The monitoring device provided by this utility model includes the optical measuring device 100 of any of the above embodiments.

[0087] In the aforementioned monitoring equipment, the multi-core optical fiber 16 can split the light beam from the light source coupling assembly 14 into two beams, one entering the monitoring end 24 and the other entering the external optical fiber coupling end 26. These two beams can be output to the power monitoring component 18 and the external optical fiber coupling assembly 20, respectively. The use of the multi-core optical fiber 16 avoids the defects of using large-diameter optical fibers side by side on the coupling end face, which causes the coupling surface to be out of axis. It can guide the light into the symmetrical and parallel coupling end face at a fixed incident angle, which greatly improves the coupling efficiency. Moreover, by using a fixed ratio of optical fiber cores, the ratio of the beam entering the monitoring end 24 can be fixed, which can achieve simple assembly and high consistency.

[0088] Specifically, one of the functions of monitoring equipment is the measurement of blood oxygen saturation (such as mixed venous oxygen saturation). Mixed venous oxygen saturation can refer to the oxygen saturation of pulmonary artery blood, which can dynamically reflect changes in oxygen balance and tissue hypoxia.

[0089] The monitoring equipment also includes a main unit, and the optical measuring device 100 can be fixedly mounted on or detachably mounted on the main unit. The optical measuring device 100 includes an optical path module assembly box 12, which mainly realizes the emission, monitoring and reception of light beams.

[0090] In summary, the optical measuring device 100 and the monitoring equipment of this utility model have at least the following beneficial effects: 1) The use of multi-core fiber 16 improves optical path coupling efficiency, reduces the output power of the light source, and increases the output power of the external fiber, making the test more accurate. Furthermore, because the output power of the light source is reduced, the required beam can be emitted at the upper limit of the light source's output power, and there is sufficient redundancy when the output power needs to be adjusted upwards. Operating the light source at a lower output power also extends its lifespan and improves its operational stability. 2) By using connectors to connect the components, the structural assembly of the light source coupling end 22, the external optical fiber coupling end 26 and the monitoring end 24 is more stable and simple, reducing the consistency deviation of each component. 3) The multi-core fiber 16 design, which can be bundled and split, is compatible with multi-source access schemes. Two light sources can be coupled to one light source coupling end 22, or more light sources can be used, increasing the light source coupling end 22, and then combined into the final external fiber coupling end 26 through the multi-core fiber 16, while maintaining the uniformity of the output light distribution.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An optical measuring device for blood oxygen saturation, used in monitoring equipment, characterized in that, The optical measurement device includes an optical path module assembly box, which includes a light source coupling assembly, a multi-core optical fiber, a power monitoring device, and an external optical fiber coupling assembly. One end of the multi-core optical fiber is a light source coupling end, and the other end branches into a monitoring end and an external optical fiber coupling end; The light source coupling assembly is used to couple light beams emitted by various light sources of different wavelengths into the light source coupling end through optical devices. The external optical fiber coupling end is connected to the external optical fiber coupling assembly, and the monitoring end is connected to the power monitoring device.

2. The optical measuring device according to claim 1, characterized in that, The light source coupling assembly includes at least one light output terminal, and the number of light source coupling terminals is equal to the number of light output terminals.

3. The optical measuring device according to claim 1, characterized in that, The light source coupling assembly includes a first light source and a second light source, and the optical device includes a beam splitter and a first lens group. The beam splitter is used to reflect a first light beam emitted by the first light source into the first lens group and to transmit a second light beam emitted by the second light source into the first lens group. The first lens group is used to couple the first beam and the second beam into the coupling end of the light source.

4. The optical measuring device according to claim 1, characterized in that, The optical detection device includes a control component, which is electrically connected to the power monitoring device and to the light source coupling component. The control component is used to receive the power signal output by the power monitoring device and adjust the output power of the light source according to the power signal and a preset power.

5. The optical measuring device according to claim 1, characterized in that, The external fiber optic coupling assembly includes a second lens group, which is used to adjust the area of ​​the light spot output by the external fiber optic coupling assembly to be equal to the cross-sectional area of ​​the external fiber optic cable.

6. The optical measuring device according to claim 1, characterized in that, The external fiber optic coupling assembly further includes an optical receiver for receiving the reflected beam transmitted through the external fiber optic cable and outputting an electrical signal based on the reflected beam. The reflected beam is formed by the measurement sample reflecting the beam output by the external fiber optic coupling assembly.

7. The optical measuring device according to any one of claims 1-6, characterized in that, The splitting ratio of the external optical fiber coupling end is K1, and the splitting ratio of the monitoring end is K2, where K1:K2 is greater than 1.

8. The optical measuring device according to any one of claims 1-6, characterized in that, The incident light beam half-width angle of the multi-core optical fiber is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.

966. The beam half-width angle of the emitted light from the multi-core optical fiber is 30° to 75°, corresponding to a numerical aperture of 0.5 to 0.

966.

9. The optical measuring device according to any one of claims 1-6, characterized in that, The optical measurement device includes a first connector, a second connector, and a third connector. The first connector is located at the light source coupling end, the second connector is located at the monitoring end, and the third connector is located at the external optical fiber coupling end. The light source coupling assembly is connected to the light source coupling end through the first connector, the power monitoring device is connected to the monitoring end through the second connector, and the external optical fiber coupling assembly is connected to the external optical fiber coupling end through the third connector; The first lens group of the optical device includes a first convex lens, which includes an incident light surface and an exit light surface facing away from each other. The incident light surface is convex, and the exit light surface is planar. The incident light surface faces the beam splitter of the optical device. The second lens group of the external fiber coupling assembly includes a second convex lens and a third convex lens. Both the second and third convex lenses include a convex surface and a plane. Along the direction away from the external fiber coupling end, the second and third convex lenses are arranged in sequence. The optical axis of the second convex lens coincides with the optical axis of the third convex lens. The plane of the second convex lens faces the external fiber coupling end. The convex surface of the second convex lens is opposite to the convex surface of the third convex lens. The plane of the third convex lens faces the external fiber.

10. A monitoring device, characterized in that, Includes the optical measuring device according to any one of claims 1-9.

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