Split type light path tool and method

Abstract

The invention relates to a split type light path tool and method, and the tool comprises a first connector which is provided with a first arc-shaped track on the upper surface; a second arc-shaped rail is arranged on the lower surface of the second connecting body; each of the first arc-shaped track and the second arc-shaped track is formed by sequentially connecting at least two linear extension sections and at least one arc-shaped bent section; one end of each linear extension section and the end wall of each connecting body form two through open holes; the first connecting body and the second connecting body are connected through a connecting structure and jointly define an arc-shaped cavity. The shape of the optical fiber is restrained through the arc-shaped cavity, so that the optical fiber is in a preset bending track when being packaged and fixed, and the local stress and microbend loss of the optical fiber in the installation and test process are remarkably reduced; compared with a common manual placing or unconstrained fixing mode, the method has the advantages that signal attenuation and measurement errors caused by random bending or position deviation of the optical fibers are reduced; the sequence and positioning of each operation are standardized through the steps of the matched method, and the repeatability of the test process is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric device detection, and in particular to a split type optical path tool and method. BACKGROUND

[0002] In the research and development, production and quality control process of photoelectric detection systems such as near-infrared spectroscopy technology and brain oxygen monitoring, in order to ensure the accuracy and reliability of the measurement results, the photoelectric system needs to be tested for optical consistency. Such testing usually requires the use of a tissue equivalent simulator to verify the output stability and receiving consistency of the photoelectric system probe by simulating the optical properties of biological tissue in a specific waveband.

[0003] The existing consistency test usually requires the emission probe and the receiving probe of the photoelectric system to be directly aligned and fixed to the interface position of the simulator. Since the interface spacing of the simulator is fixed, and the probe layout of different models of photoelectric systems is different, the probe often needs to be bent or folded during actual operation to adapt to the interface position. However, there are the following significant defects: Random bending, local stress concentration or inconsistent bending radius of the optical fiber caused by manual placement or non-guided clamping are difficult to ensure that the optical path conditions are completely consistent during each test in the process of manual bending and fixing. Small differences in probe bending radius and stress state will introduce additional optical path changes, resulting in poor repeatability and reduced comparability of test results. Moreover, frequent or excessive bending can easily cause damage to the internal optical fiber of the probe, loosen the connection points, or shift the optical elements, thereby causing optical performance degradation or even equipment damage, increasing the cost of use and maintenance. In addition, this method relies heavily on the experience of the operator, and the standardization of the operation directly affects the reliability of the test results, which is not conducive to the establishment of a standardized testing process.

[0004] In particular, the existing method lacks active control and standardization of the optical path form. The radius of curvature of the optical path formed by the probe in the free bending state is uncertain, making it difficult to ensure the consistency of the optical path conditions between different tests or different probes, and thus unable to effectively distinguish between real performance changes of the system and the effects of test condition fluctuations. At the same time, the fixed spacing of the simulator interface makes it difficult to flexibly adapt to photoelectric systems with different distances between the emission end and the receiving end, limiting the versatility of the test tool.

[0005] Therefore, there is an urgent need for a photoelectric system consistency test tool that can standardize the optical path form, avoid mechanical damage to the probe, and flexibly adapt to different probe distances, in order to improve the reliability, repeatability and operational convenience of the testing process. SUMMARY

[0006] The purpose of the present application is to overcome the deficiencies in the prior art, and the present application provides a split optical path tool to solve the technical problems of random fiber bending, local stress concentration or inconsistent bending radius caused by manual placement or non-guided clamping in the prior art.

[0007] To achieve the above object, the present application provides the following technical scheme: a split optical path tool, comprising: a first connecting body, which is a plate-shaped structure extending along its length direction, and has a first arc-shaped track on its upper surface; a second connecting body, which is a plate-shaped structure extending along its length direction, and has a second arc-shaped track corresponding to the first arc-shaped track on its lower surface; the first arc-shaped track and the second arc-shaped track are both composed of at least two straight extension segments and at least one arc-shaped bending segment connected in sequence; the straight extension segments extend along the length direction of the respective connecting body, and the two ends of the arc-shaped bending segment are respectively communicated with one end of each of the straight extension segments; one end of each of the straight extension segments away from the arc-shaped bending segment forms two through holes with the end wall of the respective connecting body; wherein the first connecting body and the second connecting body are connected through a connecting structure, and the first arc-shaped track and the second arc-shaped track jointly enclose an arc-shaped cavity.

[0008] However, by designing the arc-shaped track as a continuous path composed of straight extension segments and bending segments, the present embodiment enables the fiber to have a stable and controllable wiring path in the tool, avoiding the problems of random fiber bending, local stress concentration or inconsistent bending radius caused by manual placement or non-guided clamping. The arc-shaped bending segment provides fiber bending buffer, enabling the fiber to remain flexible and not be squeezed by sharp corners in the channel, thereby reducing optical loss and microbending effect. The straight extension segment provides stable guidance for the inlet and outlet, enabling the fiber to maintain axial consistency during insertion, facilitating the alignment of the optical path by the probe in subsequent testing.

[0009] Preferably, the connecting structure comprises an insertion slot extending along the length direction of the upper surface of the first connecting body and penetrating through, and the second connecting body is inserted into the insertion slot.

[0010] Through the cooperation of the insertion slot and the insertion, the two connecting bodies can be automatically aligned during assembly, avoiding misplacement or cavity eccentricity caused by manual placement, thereby ensuring the consistency of the fiber path. The insertion slot can also improve the mechanical strength of the tool, enabling the entire optical path tool to maintain a stable structural framework.

[0011] Preferably, the inner side wall of the insertion slot is provided with a sliding groove extending along the length direction; the outer side wall of the second connecting body is provided with a sliding block matched with the sliding groove; and the sliding block and the sliding groove are in sliding cooperation.

[0012] The matching of the sliding groove and the sliding block makes the assembly of the connecting bodies have obvious guiding effect, improves the assembly efficiency and the repeated positioning accuracy of the optical path. The sliding matching structure can also reduce the assembly error and improve the axis consistency of the arc-shaped cavity formed by the two arc-shaped tracks.

[0013] Preferably, the end surface of the first connecting body and the second connecting body at one end in the length direction is provided with a first light barrier, a second light barrier and a third light barrier which are arranged in the width direction of the respective connecting body; the third light barrier is located between the first light barrier and the second light barrier and separates the inlet area and the outlet area; the outlet area is formed by the inner side wall of the first light barrier and one side wall of the third light barrier, and the inlet area is formed by the inner side wall of the second light barrier and the other side wall of the third light barrier; the inlet area and the outlet area are respectively communicated with the two openings of the respective arc-shaped track.

[0014] The clear partition formed by the light barrier makes the optical fiber inlet and outlet have fixed positions, reduces external light interference and improves the repeatability of the optical path consistency test. The structure also plays a role of optical isolation, so that the emission probe and the receiving probe will not interfere with each other when working.

[0015] Preferably, the end surface of the first connecting body and the second connecting body at one end in the length direction and close to the respective opening is in a stepped shape, the outlet area is located on the low-order plane of the end surface, and the inlet area is located on the high-order plane of the end surface.

[0016] The inlet area and the outlet area are distinguished in height by the stepped structure, which can reduce the same side light signal crosstalk and improve the optical path isolation degree. The stepped design can also guide the optical fiber to enter and exit, improve the optical fiber fixation, and reduce the probe contact error.

[0017] Preferably, the opening width of each inlet area in the width direction of the connecting body is smaller than the opening width of each outlet area in the width direction of the connecting body.

[0018] The larger opening width of the outlet area provides higher freedom for the insertion and positioning of the probe, so that the probe can enter the corresponding interface position in the state of natural mechanical interference, avoiding the problems such as inclination, eccentricity or coupling end face deviation of the probe caused by extrusion, thereby improving the optical path coupling stability of the emission end and the receiving end of the photoelectric system.

[0019] Preferably, the first connecting body and the second connecting body are provided with an outwardly extending extension at one end in the length direction; the extension is in a rectangular shape, which is arranged close to the opening; the extension has a horizontal plane and an inclined transition plane opposite to the horizontal plane, the horizontal plane is coplanar with the bottom surface of the connecting body, and the inclined transition plane forms an acute angle with the horizontal plane.

[0020] The effective mechanical buffer zone is formed at the fiber outlet by the extension part, so that the fiber is not damaged due to sharp angle bending with the edge of the tool. The inclined transition surface provides a flexible transition track, so that the optical signal is more stable, the fiber bending stress is smaller, and the reliability of the test and the service life of the fiber are improved.

[0021] Preferably, the first arc-shaped track and the second arc-shaped track are symmetrical about the center line in the width direction of the respective connecting body and are symmetrically distributed on the respective connecting body.

[0022] By symmetrical arrangement, the optical path deviation can be avoided to the greatest extent, the positioning accuracy of the fiber in the arc-shaped cavity is improved, and the photoelectric system consistency test has higher repeatability and stability. The structure is also conducive to the unified design of the probe interface position, and the universality of the tool is improved.

[0023] Preferably, the arc-shaped bending section is a U-shaped circular arc section, the center of which is located on the center line in the width direction of the respective connecting body; the center line in the width direction of the respective connecting body of the first arc-shaped track and the second arc-shaped track is a symmetry axis, and the two straight line extension sections and the arc-shaped bending section are mirror-symmetrically distributed.

[0024] By adopting the U-shaped circular arc section as the fiber bending part, the stress of the fiber at the bending part can be uniform, local loss caused by sharp corners can be avoided, and stable bending radius can be provided to improve the optical transmission consistency. The center is located on the center line to ensure the symmetry of the bending geometry, so that the position of the fiber in the cavity is centered and will not deviate to either side wall.

[0025] The application also provides a use method of the split optical path tool. The first connecting body and the second connecting body of the split optical path tool are separated. An optical fiber is arranged in the arc-shaped track of the first connecting body or the second connecting body. The first connecting body and the second connecting body are connected through the connecting structure, so that the arc-shaped tracks of the two are jointly enclosed to form an arc-shaped cavity, so that the optical fiber is packaged and fixed in the arc-shaped cavity with a predetermined shape.

[0026] The method can directly arrange the optical fiber in an unobstructed state through a three-step process of separation, placement and closure, avoiding the problem that the traditional integral optical fiber clamp needs to be threaded from a narrow entrance, causing fiber scratching, local stress concentration or bending damage. The optical fiber directly fits the path formed by the straight line section and the arc-shaped bending section in the track, so that the bending radius, position and geometry of the optical fiber are controllable, and the consistency of the optical path arrangement is greatly improved.

[0027] Compared with the prior art, the application has at least the following beneficial effects: The split optical path tool forms a controlled arc-shaped cavity by the arc-shaped tracks in the upper and lower first connecting body and the second connecting body corresponding to each other, that is, the shape of the optical fiber is constrained by the mechanical structure design, so that the optical fiber has a predetermined and repeatable bending trajectory when being packaged and fixed, thereby significantly reducing the local stress and micro-bending loss of the optical fiber during installation and testing. Compared with the common manual placement or unconstrained fixing method, the structure reduces the signal attenuation and measurement error caused by random bending or position deviation of the optical fiber, thereby improving the consistency and comparability of the optical detection results.

[0028] To realize assembly precision and repeatability, the plug-in and sliding guide cooperation mechanism is introduced, so that the upper and lower members are automatically aligned and stably clamped during folding. This cooperation mechanism reduces the dependence on the technical level of the operator during assembly, avoids the axial deviation of the optical path caused by position deviation, and improves the repeatability and yield during batch testing. In addition, the cavity design combining the symmetrical arrangement and the linear extension section and the arc-shaped bending section takes into account the convenience of inserting the optical fiber and the controlled bending radius, facilitating the repeatable adaptation between optical fibers of different lengths or different models.

[0029] The structure of the end extension and the inclined transition surface provides a stress buffer and a gradual transition path for the optical fiber at the edge of the tool, effectively suppressing the sharp corner extrusion or scratching at the outlet, and reducing the risk of damage to the optical fiber caused by repeated plugging and unplugging. This protection measure prolongs the service life of the optical fiber and the probe, while reducing maintenance costs and increasing available time in the actual test environment.

[0030] The use method of the split optical path tool standardizes the order and positioning of each operation by flowing the operation processes such as placing, packaging, connecting with equivalent medium, and inserting the transmitting / receiving probe in natural state through the matching method steps, thereby significantly improving the repeatability of the test process and facilitating the result comparison between different test benches or different operators. This method is particularly suitable for quality control, laboratory evaluation, and equipment consistency verification scenarios that require high comparability and batch verification.

[0031] The application will be further described below in conjunction with the drawings and specific embodiments in the specification. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 It is a structure schematic view of the first connecting body and the second connecting body of the application in a separated state. Fig. 2 It is a top structure schematic view of the second connecting body of the application.

[0033] 1, first connecting body; 2, second connecting body; 3, first arc-shaped track; 4, second arc-shaped track; 5, opening; 7, slot; 8, sliding groove; 9, sliding block; 10, first light barrier; 11, second light barrier; 12, third light barrier; 13, outlet area; 14, inlet area; 15, extension; 16, horizontal plane; 17, inclined transition surface. DETAILED DESCRIPTION

[0034] In the present application, unless otherwise explicitly specified and limited, the terms installation, connection, connection, fixation and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. Among them, the detachable installation mode has many kinds, for example, it can be matched by plug-in and buckle, and for example, it can be connected by bolts and the like.

[0035] The present application will be described in more detail below with reference to specific embodiments, but the embodiments of the present application are not limited thereto, and the embodiments are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. For process parameters or conditions not specifically mentioned, refer to conventional techniques.

[0036] Please refer to Figs. 1-2 The technical scheme adopted in the present embodiment is: a split type optical path tool, comprising: a first connecting body 1, which is a plate-shaped structure extending along its length direction, and a first arc-shaped track 3 is arranged on the upper surface thereof; a second connecting body 2, which is a plate-shaped structure extending along its length direction, and a second arc-shaped track 4 corresponding to the first arc-shaped track 3 is arranged on the lower surface thereof; the first arc-shaped track 3 and the second arc-shaped track 4 are both composed of at least two straight extension sections and at least one arc-shaped curved section connected in sequence; the straight extension sections extend along the length direction of the respective connecting body, and the two ends of the arc-shaped curved section are respectively communicated with one end of each of the straight extension sections; one end of each of the straight extension sections away from the arc-shaped curved section forms two through openings 5 with the end wall of the respective connecting body; wherein the first connecting body 1 and the second connecting body 2 are connected through a connecting structure, so that the first arc-shaped track 3 and the second arc-shaped track 4 jointly enclose an arc-shaped cavity; the arc-shaped cavity is used for accommodating an optical fiber.

[0037] In the embodiment, the first connector 1 and the second connector 2 are both plate-shaped structures extending along the length direction; the upper surface of the first connector 1 is processed to form a first arc-shaped track 3, and the lower surface of the second connector 2 is processed to form a second arc-shaped track 4; each of the two arc-shaped tracks includes at least two straight extending segments extending along the length direction and at least one arc-shaped bending segment connected with the arc-shaped track, the arc-shaped bending segment and each straight extending segment are continuously transitioned in geometry, and the two ends of the bending segment are connected with the straight extending segments, so that the optical fiber forms a stable straight-bending-straight continuous path in the track. The end of the straight extending segment away from the arc-shaped bending segment penetrates through the end wall of the connector to form two openings 5, and the optical fiber enters the corresponding arc-shaped track inside through the opening 5 during use and is arranged in the arc-shaped cavity according to the geometric profile of the track. When the first connector 1 and the second connector 2 are closed, the arc-shaped tracks of the two connectors correspond to each other and are enclosed, thereby forming a closed arc-shaped cavity with a fixed bending path.

[0038] However, by designing the arc-shaped track as a continuous path composed of straight extending segments and bending segments, the embodiment makes the optical fiber have a stable and controllable wiring path in the tooling, avoiding the problems of random bending, local stress concentration or inconsistent bending radius of the optical fiber caused by manual placement or non-guided clamping. The arc-shaped bending segment provides a bending buffer for the optical fiber, so that the optical fiber remains flexible and is not pressed by sharp corners in the channel, thereby reducing optical loss and microbending effect. The straight extending segment provides stable guidance for the inlet and outlet, so that the optical fiber remains axial consistency during insertion, facilitating the alignment of the optical path by the probe in subsequent testing. Moreover, the two end openings 5 of the present scheme are directly led out by the straight extending segments, which can realize convenient plugging and unplugging of the optical fiber and avoid local damage of the optical fiber caused by improper design of the bending inlet. The separable and closeable structure of the first connector 1 and the second connector 2 facilitates quick arrangement, inspection and replacement of the optical fiber, and improves the repeatability of cleaning, maintenance and multiple tests. The present scheme ensures that the geometric path of the optical fiber in the arc-shaped cavity is controllable, the optical transmission stability is high, and the repeatability and optical path reliability of the consistency test of the photoelectric system can be significantly improved.

[0039] It should be noted that in order to ensure the accuracy of the joint, the first connecting body 1 and the second connecting body 2 can be selected to be inserted, the slider 9, the sliding groove 8 or the simple positioning column or positioning hole structure to limit, so as to ensure that the two arc-shaped tracks form a complete and continuous optical fiber channel after merging. One alternative is to process the arc-shaped track into a smooth transition with a small chamfer to further reduce the friction coefficient of the contact surface between the optical fiber and the track and reduce the mechanical stress during insertion. In another variant, the arc-shaped track can adopt a shallow groove structure or a deep groove structure, or a structure with different widths to adapt to optical fibers with different outer diameters; a limiting rib can also be provided locally on the arc-shaped bending section to improve the stability of the optical fiber in the bending area. In addition, the jointing mode of the first connecting body 1 and the second connecting body 2 can be optimized to a magnetic attraction type quick jointing structure to facilitate efficiency improvement in frequent testing scenarios.

[0040] The connecting structure includes an upper surface of the first connecting body 1 being provided with an insertion slot 7 extending along the length direction and penetrating through, and the second connecting body 2 being inserted into the insertion slot 7. In this embodiment, the upper surface of the first connecting body 1 forms an insertion slot 7 extending along the length direction, and the depth of the insertion slot 7 matches the thickness of the second connecting body 2. When assembling, the second connecting body 2 slides into the insertion slot 7 in the direction of the insertion slot 7, so that the second arc-shaped track 4 on the lower surface of the second connecting body 2 is accurately aligned with the first arc-shaped track 3 of the first connecting body 1. This insertion relationship can prevent the two connecting bodies from being offset in the horizontal or vertical direction, and improve the alignment accuracy of the arc-shaped cavity.

[0041] However, through the cooperation of the insertion slot 7 and the insertion, the two connecting bodies can be automatically aligned during assembly, avoiding misplacement or cavity eccentricity caused by manual placement, thereby ensuring the consistency of the optical fiber path. The insertion slot 7 can also improve the mechanical strength of the tooling, so that the entire optical path tooling maintains a stable structural framework. It should be noted that the insertion slot 7 can be provided with a positioning protrusion or a stop portion, so that the second connecting body 2 is automatically positioned to the appropriate position after insertion. One alternative is that the insertion slot 7 can be locally provided with an elastic clamping piece to realize screw-free clamping fixation. In addition, the first connecting body 1 and the second connecting body 2 can be connected by a buckling member or connected by an adhesive member, such as a magic band, or connected by a magnetic member.

[0042] The inner wall of the slot 7 is provided with a groove 8 extending along its length; the outer wall of the second connector 2 is provided with a slider 9 adapted to the groove 8; the slider 9 slides in conjunction with the groove 8. In this embodiment, each side of the inner wall of the slot 7 of the first connector 1 is provided with a groove 8 extending along its length. The outer wall of the second connector 2 is correspondingly provided with a slider 9, the shape of which is consistent with the groove 8; and it can be made of wear-resistant material. During assembly, the slider 9 slides smoothly along the groove 8, so that the second connector 2 is pushed into the slot 7 from one end until it is fully in place. An appropriate interference fit can be provided between the slider 9 and the groove 8 so that the second connector 2 is not easy to loosen after insertion. However, the structure of the groove 8 and the slider 9 gives the assembly between the connectors a significant guiding effect, improving assembly efficiency and the repeatability of the optical path positioning accuracy. The sliding fit structure can also reduce assembly errors and improve the axial consistency of the arc cavity formed by the two arc-shaped tracks. It should be noted that the slider 9 can be made of elastic material so that it can achieve a clamping effect after sliding into the groove 8. An alternative solution is that the groove 8 can be a T-groove or an arc groove, and the slider 9 can be a T-block or a ball block to adapt to different load requirements. If it is necessary to reduce friction, a lubricating coating can be added to the groove 8 or a PTFE sheet can be embedded.

[0043] Both the first connector 1 and the second connector 2 have a first light-blocking plate 10, a second light-blocking plate 11, and a third light-blocking plate 12 spaced apart along the width direction of their respective ends on their end surfaces in the length direction. The third light-blocking plate 12 is located between the first light-blocking plate 10 and the second light-blocking plate 11, and forms an inlet area 14 and an outlet area 13. The outlet area 13 is formed by the inner sidewall of the first light-blocking plate 10 and one sidewall of the third light-blocking plate 12, and the inlet area 14 is formed by the inner sidewall of the second light-blocking plate 11 and the other sidewall of the third light-blocking plate 12. The inlet area 14 and the outlet area 13 are respectively connected to the two openings 5 ​​of their respective arc-shaped tracks.

[0044] In the embodiment, the first connector 1 and the second connector 2 are each provided with three light barriers at one end in the length direction, namely a first light barrier 10, a second light barrier 11 and a third light barrier 12 between the first light barrier 10 and the second light barrier 11; the three light barriers are arranged in the width direction of the connector. The third light barrier 12 divides the end region into two independent channels, namely an inlet region 14 and an outlet region 13; the outlet region 13 corresponds to the first light barrier 10 and the third light barrier 12, thereby being in communication with one end opening 5 of the arc-shaped track; the inlet region 14 and the second light barrier 11 and the third light barrier 12 form a channel, thereby being in communication with the other end opening 5 of the groove. The structure is used to limit the position of the optical fiber inlet and outlet, to make the optical signal path more stable, and to avoid light scattering interference. However, the clear division formed by the light barriers makes the optical fiber inlet and outlet have a fixed position, reduces external light interference, and improves the repeatability of the optical path consistency test. The structure also has a light isolation effect, so that the transmitting probe and the receiving probe do not interfere with each other during operation. It should be noted that the light barriers can be made of light-absorbing materials to further suppress reflected light. An alternative solution is that the light barriers can have a detachable structure, so that the distance can be adjusted according to the size of the probe during testing. In another variant, the third light barrier 12 can be provided with a variable position structure to adjust the width of the inlet and outlet region 13 by sliding.

[0045] The end surface of the first connector 1 and the second connector 2 in the length direction and close to the opening 5 of each end is in a stepped shape, the outlet region 13 is located on the low step surface of the end surface, and the inlet region 14 is located on the high step surface of the end surface. In the embodiment, the end surface of the two connectors close to the opening 5 of each end is in a stepped structure, the stepped structure includes a low step surface and a high step surface, wherein the low step surface corresponds to the outlet region 13, and the high step surface corresponds to the inlet region 14. The height difference of the stepped shape naturally separates the inlet region 14 and the outlet region 13 in the vertical direction, further improving the independence of the optical path channel. The optical fiber smoothly enters the arc-shaped cavity after entering the low step surface, and the outlet region 13 is located on the low step surface, which can be better aligned with the receiving probe interface. However, the height difference between the inlet region 14 and the outlet region 13 can be reduced by the stepped structure, which can reduce the same side optical signal crosstalk and improve the optical path isolation. The stepped design can also guide the optical fiber to enter and exit, improve the stability of the optical fiber, and reduce the contact error of the probe. It should be noted that the height difference of the stepped structure can be adjusted according to the height of the probe. An alternative solution is that the stepped structure can be replaced by a beveled structure to allow the probe to be inserted at an inclined angle. In another variant, a flexible gasket can be provided on the low step surface to improve the stability of the contact between the optical fiber and the probe.

[0046] The opening width of each of the inlet regions 14 along the width direction of the connecting body is smaller than the opening width of each of the outlet regions 13 along the width direction of the connecting body. In the present embodiment, the end portions of the first connecting body 1 and the second connecting body 2 are each provided with an inlet region 14 and an outlet region 13, and the two types of regions correspond to the two openings 5 of the arc-shaped groove of the respective connecting bodies, respectively. On the basis of this structure, the opening width of each of the inlet regions 14 along the width direction of the connecting body is preferably set to be smaller than the opening width of the corresponding outlet region 13. For example, the inlet region 14 can be designed as a narrow limiting window, and the outlet region 13 is designed as a probe insertion port with a larger opening. The inner side wall of the inlet region 14 and the third light barrier 12 form a narrow optical fiber entering channel, and the inner side wall of the outlet region 13 and the third light barrier 12 form a wide optical probe insertion channel. In actual assembly, the optical fiber enters the arc-shaped groove from the narrow inlet region 14, and the limiting effect of the inlet region 14 makes the optical fiber automatically close to the center line of the cavity. The larger opening of the outlet region 13 provides sufficient space for the receiving probe or the transmitting probe to be inserted into the designated probe interface position in a natural curved and non-compressed state. After the first connecting body 1 and the second connecting body 2 are closed, the size relationship of the corresponding inlet regions 14 and outlet regions 13 on both sides remains consistent, ensuring that the optical path channel penetrates and has a stable geometric boundary.

[0047] However, since the opening width of the inlet region 14 is smaller than that of the outlet region 13, the present embodiment can form effective lateral limiting in the region where the optical fiber enters the cavity, so that the optical fiber does not drift laterally during the process of entering the arc-shaped cavity, thereby ensuring that it maintains a stable bending radius and axial position in the curved section. The narrow inlet region 14 forms a flexible guide for the optical fiber, which can significantly reduce the optical path uncertainty and micro-bending loss caused by biased installation. The larger opening width of the outlet region 13 provides higher freedom for the insertion and positioning of the probe, so that the probe can enter the corresponding interface position in a natural mechanical interference state, avoiding problems such as tilting, eccentricity or coupling end face deviation of the probe caused by compression, thereby improving the optical path coupling stability of the transmitting end and the receiving end of the optoelectronic system. Moreover, the narrow inlet and wide outlet design of the opening makes the geometric position of the optical fiber strictly limited from the inlet side, and the insertion condition of the probe is compensated by the wide opening from the outlet side, realizing independent constraint and partition coupling between the optical fiber and the probe, significantly improving the consistency and repeatability of the overall optical path, and is particularly suitable for optoelectronic consistency test scenarios with high requirements for stable and controllable optical paths.

[0048] A replaceable solution is to adjust the width difference of the inlet area 14 and the outlet area 13 into a gradual form, that is, the width of the inlet area 14 gradually changes from narrow to wide in the width direction, and forms a continuous transition with the outlet area 13, which can further improve the smoothness of the guiding when the optical fiber is inserted. In another preferred solution, the inner side wall of the inlet area 14 can be selected to have a rounded or chamfered structure, so as to further reduce mechanical friction when guiding the optical fiber to enter, and avoid damage to the optical fiber sheath; and the outlet area 13 can be provided with a local auxiliary positioning boss to further enhance the stability after the probe is inserted. In addition, different width ratio matching can also be provided to adapt to the testing needs of optical fibers of different diameters or probes of different external sizes, so that the tool can be used interchangeably in different optoelectronic systems.

[0049] The first connecting body 1 and the second connecting body 2 are provided with an outwardly extending extension part 15 at one end in the length direction; the extension part 15 is rectangular in shape and is arranged close to the opening 5; the extension part 15 has a horizontal plane 16 and an inclined transition surface 17 opposite to the horizontal plane 16, the horizontal plane 16 is coplanar with the bottom surface of the connecting body, and the inclined transition surface 17 forms an acute angle with the horizontal plane 16. In this embodiment, the first connecting body 1 and the second connecting body 2 each form a rectangular extension part 15 at one end in the length direction, which is arranged close to the opening 5 of the arc-shaped track, so as to become the transition area before and after the optical fiber exit and entry tool. The extension part 15 has a horizontal plane 16, which is coplanar with the bottom surface of the connecting body, so that the tool has good support stability when placed. The other side of the extension part 15 is provided with an inclined transition surface 17, which forms an acute angle with the horizontal plane 16, so that the optical fiber does not hard bend when it is stretched out of the tool, but naturally bends and transitions along the inclined transition surface 17. The inclined transition surface 17 can be designed according to the minimum bending radius of the optical fiber to ensure the safety of the optical fiber without damage. The extension part 15 forms an effective mechanical buffer zone at the optical fiber exit, so that the optical fiber will not be damaged due to the sharp angle bending with the edge of the tool. The inclined transition surface 17 provides a flexible transition track, so that the optical signal is more stable, the bending stress of the optical fiber is smaller, and the reliability of the test and the service life of the optical fiber are improved. The inclined transition surface 17 can be provided with a curved surface structure to make the transition of the optical fiber more gentle. A replaceable solution is that the extension part 15 can adopt an independent detachable module, so as to be quickly replaced under different length and angle requirements. In another variant, an elastic pad or a flexible guide tube can be added to improve the protection performance of the optical fiber.

[0050] The first arc-shaped track 3 and the second arc-shaped track 4 are symmetrically distributed on the connecting bodies in which they are located, with the center line of the connecting body width direction as the axis of symmetry. In this embodiment, the first arc-shaped track 3 and the second arc-shaped track 4 are arranged on the center line of the connecting body width direction, so that the two grooves are kept in a symmetrical position relative to the connecting body. Through this design, when the first connecting body 1 and the second connecting body 2 are closed, the two arc-shaped tracks can form a completely coaxial and symmetrical arc-shaped cavity, ensuring that the position of the optical fiber in the cavity is the geometric center and ensuring the consistency of the optical path. Through symmetrical arrangement, the optical path deviation can be avoided to the greatest extent, the positioning accuracy of the optical fiber in the arc-shaped cavity is improved, and the photoelectric system consistency test has higher repeatability and stability. This structure is also conducive to the unified design of the probe interface position and improves the universality of the tooling. It should be noted that the symmetry accuracy of the groove center line position can be ensured by precision machining or injection mold structure. One alternative is to add marking lines on the connecting body to assist manual rapid confirmation of the groove position. In another variant, double arc-shaped tracks can be designed, with the center line as the axis of symmetry, for parallel testing of multiple optical paths.

[0051] The first arc-shaped track 3 and the second arc-shaped track 4 are composed of a straight extension segment and an arc-shaped bending segment connected in sequence; the straight extension segment extends along the length direction of the connecting body, and the two ends of the arc-shaped bending segment are respectively communicated with one end of each of the straight extension segments. In this embodiment, the arc-shaped track is composed of two parts: a straight extension segment and an arc-shaped bending segment. The straight extension segment extends along the length direction of the connecting body and has a shape of a straight line part of a semi-ellipse; the arc-shaped bending segment is located in the middle or end of the groove to meet the requirement of the predetermined optical fiber bending track. The combination of the straight extension segment and the bending segment allows the optical fiber to first keep a straight line state after entering the cavity and then present a controlled bending in the bending segment, so that the curvature radius of the optical path remains uniform. The straight extension segment facilitates the insertion of the optical fiber, and the arc-shaped bending segment can provide an accurately controlled bending shape of the optical path, making the test process stable and reliable. The bending segment avoids random bending of the optical fiber, improves the consistency of optical signal transmission, and thus improves the detection accuracy of the photoelectric system. In addition, the length of the straight extension segment can be adjusted according to the test requirement. The arc-shaped bending segment can be designed to have multiple segments with varying curvatures to simulate the internal refractive path of different tissue equivalent models. One alternative is that the arc-shaped bending segment can be replaced by a combination of a broken line segment and a small arc segment for specific optical path model simulation.

[0052] The arc-shaped curved section is a U-shaped circular arc section, and the center of the circle is located on the center line in the width direction of the connecting body; the center line in the width direction of the connecting body on which the first arc-shaped track 3 and the second arc-shaped track 4 are located is a symmetry axis, and the two straight line extension sections and the arc-shaped curved section are mirror-symmetrically distributed. In this embodiment, the arc-shaped curved sections in the first arc-shaped track 3 and the second arc-shaped track 4 are both designed as U-shaped circular arc sections, and the center of the circle is located on the center line in the width direction of the connecting body, so that the curved section has a completely symmetrical characteristic in the width direction on both sides. In this structure, the straight line extension sections are symmetrically distributed on the left and right sides of the center line, and the arc-shaped curved section is located at the end of the straight line extension section. The tracks in the first connecting body 1 and the second connecting body 2 are mirror-symmetrically arranged along the center line in the width direction, that is, when the two are closed, the two U-shaped circular arc sections completely coincide in the spatial position, forming a symmetrical and smooth curved channel. This mirror image distribution ensures that the optical fiber is arranged in the center of the arc-shaped cavity formed finally, and does not deviate from the center or bear uneven force due to structural bias. In addition, the width of the straight line extension section is equal to the width of the arc-shaped curved section.

[0053] However, by adopting a U-shaped circular arc section as the optical fiber bending part, the stress of the optical fiber at the bending part can be uniform, local loss caused by sharp corners can be avoided, and a stable bending radius can be provided to improve the consistency of optical transmission. The center of the circle located on the center line ensures the symmetry of the bending geometry, so that the position of the optical fiber in the cavity is in the center and does not deviate to either side wall. The mirror-symmetrically distributed tracks enable the first connecting body 1 and the second connecting body 2 to be automatically registered when they are closed, improve the assembly precision of the tool, and avoid steps or clamping points due to misalignment of the tracks in the arc-shaped cavity. This symmetrical structure also improves the stability of the optical path center axis, so that the optical axis consistency is higher when the probe is inserted, which is beneficial to improving the consistency of photoelectric detection. A replaceable solution is to slightly adjust the position of the center of the U-shaped circular arc section, so that the bending radius is customized according to different optical fiber models, so as to achieve the optimal bending condition in different test scenarios. In another preferred mode, the symmetrical structure can be further combined with a limiting column, a positioning block or a sliding rail to make the center line after closing more accurate and improve the fault tolerance of processing and assembly. The U-shaped circular arc section can also be replaced by a composite curve composed of multiple circular arcs to improve the stress distribution of the optical fiber on the bending path.

[0054] A method for using the split optical path tool, comprising the split optical path tool, the method comprising the following steps: separating the first connecting body 1 and the second connecting body 2 of the split optical path tool; arranging an optical fiber in the arc-shaped track of the first connecting body 1 or the second connecting body 2; connecting the first connecting body 1 and the second connecting body 2 through the connecting structure, so that the arc-shaped tracks of the two are jointly enclosed to form an arc-shaped cavity, thereby packaging and fixing the optical fiber in the arc-shaped cavity with a predetermined shape.

[0055] In this embodiment, the user first separates the first connecting body 1 and the second connecting body 2 of the split optical path tool along the direction of their closure, exposing the two arc-shaped tracks completely, thereby providing space for optical fiber arrangement. The two connecting bodies after separation can be kept relatively stable through the preset positioning structure, facilitating subsequent placement of optical fibers. In the optical fiber installation step, the operator directly lays the optical fiber to be debugged or tested in the first arc-shaped track 3. Based on the characteristic that the first arc-shaped track 3 is continuously composed of a straight extension segment and an arc-shaped curved segment, the optical fiber naturally conforms to the geometric profile of the track during the laying process, thereby forming a predetermined curved path. In another use mode, the optical fiber can also be placed in the second arc-shaped track 4, which is equivalent.

[0056] Subsequently, the operator closes the first connecting body 1 and the second connecting body 2. During the closure process, through the connecting structure, such as the plug and the socket, the magnetic attraction structure, the buckle structure or the positioning slot structure, provided between the two connecting bodies, the limited assembly of the two is realized, so that the first arc-shaped track 3 and the second arc-shaped track 4 correspond to each other. After closure, the two tracks form a closed arc-shaped cavity, and the optical fiber is covered and stably held inside the cavity. In the closed state, the end openings 5 of the straight extension segments are aligned, so that the two ends of the optical fiber are drawn out from the openings 5, thereby realizing the optical fiber to maintain a predetermined bending shape inside the tool, while the two ends remain connectable to other optical components, light sources or detectors.

[0057] This use method realizes the optical fiber assembly process through three steps of separation, placement and closure, so that the optical fiber can be directly arranged in an unobstructed state, avoiding the problem of traditional integral optical fiber clamps that need to be threaded from a narrow entrance, causing optical fiber scratches, local stress concentration or bending damage. The optical fiber directly conforms to the path formed by the straight segment and the arc-shaped curved segment in the track, so that the bending radius, position and geometric shape of the optical fiber are controllable, greatly improving the consistency of the optical path arrangement.

[0058] Since the finally formed arc-shaped cavity is completely closed, the optical fiber is not easy to deviate due to environmental disturbance or contact during use, thereby significantly improving the stability and repeatability of the optical path. This method is particularly suitable for optoelectronic consistency testing, optical fiber attenuation measurement, optical interface coupling testing and other application scenarios that require precise control of the bending shape of the optical fiber.

[0059] In addition, the fiber installation, maintenance and replacement can be completed in seconds by the structural characteristics of the cavity formed by the closure, greatly improving the efficiency of the test tool in the verification process of multiple batches of optical systems. It should be noted that a low-friction protective layer such as a PTFE coating can be applied to the surface of the arc-shaped track before closure, making the fiber contact with the groove more gentle during placement, thereby further reducing micro-damage caused by placement. In another variant embodiment, the optical fiber can be locally fixed during the placement stage by a pre-set soft limiting sheet or flexible clamping strip to avoid deviation due to vibration during closure. The limiting sheet occupies very little space after closure and does not affect the overall shape of the optical fiber in the arc-shaped cavity. In addition, the connection structure can be changed to a composite closure mode of magnetic attraction and mechanical vice to make the closure action faster and improve the repeated alignment accuracy to adapt to the use scenarios of high-frequency optical path building and disassembly.

[0060] In addition, by connecting the assembled tool to a tissue equivalent simulator test interface; inserting the emission probe and the receiving probe of an optoelectronic system into the corresponding interface area of the tool in a fixed curved natural state, respectively; and running the optoelectronic system and the tissue equivalent simulator, the optical signal passes through the optical fiber and the tissue equivalent simulator in turn and is received by the receiving probe, and the consistency of the optoelectronic system is judged by analyzing the optical signal.

[0061] S1, a pre-set length of optical fiber is placed in the arc-shaped cavity of the tool along the optical path direction, so that the optical fiber is attached to the arc-shaped cavity and is in a natural arc-shaped state.

[0062] S2, the first connecting body 1 and the second connecting body 2 are closed and locked, so that the optical fiber is fixed in the closed arc-shaped cavity, thereby limiting the arbitrary bending of the optical fiber.

[0063] S3, the outer end interface of the assembled tool is reliably connected with the test port of the tissue equivalent simulator, so that the optical path is in communication with the tissue equivalent model inside the simulator.

[0064] S4, the emission probe and the receiving probe of the optoelectronic system are inserted into the inlet area 14 and the outlet area 13 of the tool, respectively, in a state without additional bending, ensuring that the front ends of the probes are aligned with the end face of the optical fiber.

[0065] S5, start the optoelectronic system, so that the emission probe emits an optical signal, which enters the tissue equivalent simulator through the optical fiber and is received by the receiving probe. According to the intensity, time domain characteristics or spectral characteristics of the received optical signal, whether the optoelectronic system meets the consistency requirement is evaluated.

[0066] The method can standardize the fiber bending state by adopting the arc-shaped cavity with a controlled bending trajectory, i.e., by designing the mechanical structure to constrain the fiber form, so as to keep the optical path parameters consistent in each test, thereby quantitatively judging the output / reception stability of the photoelectric system and avoiding errors caused by non-system factors such as fiber placement. In combination with the tissue equivalent simulator, the scattering and absorption characteristics of the real tissue can be simulated, and the biological equivalence of the test is improved. It should be noted that different fiber bending radius tools can be selected to simulate different clinical application scenarios. In addition, the probe insertion method can adopt magnetic positioning, mechanical limiting or diaphragm collimation structure to improve the positioning accuracy of the probe. One alternative is that the tool can be connected to multiple tissue equivalent modules for multi-point calibration. In addition, in advanced applications, a temperature sensor can be integrated in the arc-shaped cavity to monitor the influence of fiber temperature rise on the test results.

[0067] The above describes the concept, specific structure and generated technical effects of the present application in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the scope of protection of the present application. In addition, all the coupling / connection relationships mentioned in the text do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation.

[0068] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application. Any brief modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application are still within the scope of the technical solutions of the present application.

Claims

1. A split optical path tooling, characterized in that, Comprise: The first connector is a plate structure extending along its length direction, and its upper surface is provided with a first arc-shaped track; The second connector is a plate structure extending along its length direction, and its lower surface is provided with a second arc-shaped track corresponding to the first arc-shaped track; The first arc-shaped track and the second arc-shaped track are both composed of at least two straight extension segments and at least one arc-shaped bending segment connected in sequence; The straight extension segments extend along the length direction of the respective connector, and the two ends of the arc-shaped bending segment are respectively communicated with one end of each straight extension segment; The one end of each straight extension segment away from the arc-shaped bending segment forms two through holes with the end wall of the respective connector; The first connector and the second connector are connected through a connecting structure, and the first arc-shaped track and the second arc-shaped track jointly enclose an arc-shaped cavity. The first connector and the second connector are connected through a connecting structure, and the first arc-shaped track and the second arc-shaped track jointly enclose an arc-shaped cavity.

2. The split optical path tool of claim 1, wherein: The connecting structure comprises an insertion slot extending along the length direction of the upper surface of the first connector and penetrating through, and the second connector is inserted into the insertion slot.

3. The split optical path tool of claim 2, wherein: The inner side wall of the insertion slot is provided with a sliding groove extending along the length direction; The outer side wall of the second connector is provided with a sliding block matched with the sliding groove; The sliding block and the sliding groove are in sliding fit.

4. The split optical path tool of claim 1, wherein: The end surface of the first connector and the second connector at one end in the length direction is respectively provided with a first light blocking plate, a second light blocking plate and a third light blocking plate arranged in the width direction of the respective connector; The third light blocking plate is located between the first light blocking plate and the second light blocking plate and separates an inlet area and an outlet area; The outlet area is enclosed by the inner side wall of the first light blocking plate and one side wall of the third light blocking plate, and the inlet area is enclosed by the inner side wall of the second light blocking plate and the other side wall of the third light blocking plate; The inlet area and the outlet area are respectively communicated with the two holes of the respective arc-shaped track.

5. The split optical path tool of claim 4, wherein: The end surface of the first connector and the second connector at one end in the length direction and close to the respective hole is in a stepped shape, the outlet area is located at the low-order plane of the end surface, and the inlet area is located at the high-order plane of the end surface.

6. The split optical path tool of claim 4, wherein: The opening width of each inlet area in the width direction of the respective connector is smaller than the opening width of each outlet area in the width direction of the respective connector.

7. The split optical path tool of claim 1, wherein: The first connector and the second connector are provided with an outwardly extending extension at one end in the length direction; The extension is in a rectangular shape, and is arranged close to the hole. The extension part has a horizontal surface and an inclined transition surface opposite to the horizontal surface, the horizontal surface is coplanar with the bottom surface of the connecting body, and the inclined transition surface forms an acute angle with the horizontal surface.

8. The split optical path tooling according to any one of claims 1-7, characterized in that, The first arc-shaped track and the second arc-shaped track are symmetrically distributed on the connecting body along the center line of the connecting body in the width direction.

9. The split optical path tooling according to any one of claims 1-7, characterized in that, The arc-shaped curved section is a U-shaped circular arc section, and the center of the circular arc section is located on the center line of the connecting body in the width direction; The center line of the connecting body in the width direction of the first arc-shaped track and the second arc-shaped track is the axis of symmetry, and the two straight line extension sections and the arc-shaped curved section are mirror-symmetrically distributed.

10. A method for using a split-type optical path fixture, characterized in that, The method comprises the steps of: Separating the first connecting body from the second connecting body of the split optical path tooling; Placing an optical fiber in the arc-shaped track of the first connecting body or the second connecting body; Connecting the first connecting body and the second connecting body through the connecting structure, so that the arc-shaped tracks of the two connecting bodies jointly enclose an arc-shaped cavity, thereby packaging and fixing the optical fiber in the arc-shaped cavity with a predetermined shape.

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