Optical image fiber bundle, method of making and fiber scope

Abstract

The application relates to a light and image transmitting fiber bundle, a manufacturing method and a fiber endoscope, and relates to the field of fiber image transmission. The light and image transmitting fiber bundle comprises an image transmitting fiber, a light transmitting fiber and a sheath pipe. The image transmitting fiber comprises a plurality of image transmitting fiber filaments. The two ends of the image transmitting fiber filaments are arranged in a corresponding order in a layer shape to form an image transmitting interface. The two ends of the light transmitting fiber are arranged in the middle of the image transmitting interface to form a fiber interface. The image transmitting fiber and the light transmitting fiber are combined in disorder to form a flexible fiber section. The sheath pipe is wrapped around the outer periphery of the fiber. The manufacturing method comprises the following steps: image transmitting fiber filaments are arranged and glued to form an interface single piece; the single piece is stacked to form an image transmitting interface section; the image transmitting interface section is cut to form an image transmitting interface; the light transmitting fiber is wound to form a light transmitting interface; the light transmitting fiber is installed in the middle of the image transmitting interface to form a fiber interface; the light transmitting fiber is integrated into the image transmitting fiber to form a flexible fiber section; and the sheath pipe is sleeved. The application can provide remote end illumination light and reduce the influence of the light transmitting fiber on the diameter of the fiber bundle. The application also provides a fiber endoscope.

Description

Technical Field

[0001] This application relates to the field of fiber optic imaging, and in particular to a fiber optic bundle for transmitting light and images. Furthermore, this application also relates to a method for fabricating a fiber optic bundle for transmitting light and images and a fiber optic endoscope. Background Technology

[0002] Fiber optic image transmission is a technology that uses optical fibers to transmit images from one end of the fiber to the other, enabling remote acquisition of images of specific areas. An endoscope is an optical instrument that can enter the human body or other tubes and cavities to observe images in places inaccessible to humans, and it has wide applications in medicine and industry. Applying optical fibers to endoscopes utilizes the principle of total internal reflection within the fiber, transmitting images from the fiber ends through multiple optical fibers across narrow and tortuous environments. This allows endoscopes to observe cavities, narrow slits, or high-risk environments inaccessible to humans, effectively expanding the scope of human observation.

[0003] Because cavities, narrow slits, or high-risk environments inaccessible to humans are often accompanied by insufficient lighting, images of the target area cannot be displayed properly. Therefore, illumination of the target area is necessary. Typically, this can be achieved by placing a cold light source at the end of the endoscope, or by using an illumination fiber optic cable to guide light from an external lighting source into the imaging environment. This improves the illumination conditions within the target area, overcoming lighting limitations, allowing for observation of a wider range of environments, and resulting in better imaging. The image of the target area can be transmitted to the other end of the endoscope via an imaging fiber optic cable, allowing for image observation or recording from the other end. Alternatively, an image sensor, such as a CCD or CMOS image sensor, can be placed at one end of the endoscope to convert the image of the target area into an electrical signal. This signal is then transmitted through wires and displayed by an external imaging device for observation or recording.

[0004] Existing endoscopes typically have an illumination source at the insertion end, with wires inside the endoscope powering the source to illuminate the target area. This illumination source not only requires significant space but also poses certain risks in specific environments. Existing endoscopes that transmit images via image sensors are susceptible to interference from extreme temperatures, electromagnetic radiation, and nuclear radiation, limiting their application. Existing endoscopes that transmit illumination light via illumination fibers and images via imaging fibers typically have an additional illumination fiber bundle outside the imaging fiber bundle. These bundles occupy space within the endoscope, requiring a larger diameter and hindering its ability to enter narrow cavities or slits. Summary of the Invention

[0005] To ensure illumination conditions at the distal end of the endoscope and reduce the diameter of the endoscope, this application provides a light-transmitting and image-transmitting fiber optic bundle, a manufacturing method, and a fiber optic endoscope.

[0006] The optical fiber bundle for transmitting light and images provided in this application adopts the following technical solution:

[0007] A light-transmitting and image-transmitting fiber bundle includes an image-transmitting fiber, a light-transmitting fiber, and a sheath. The image-transmitting fiber includes multiple image-transmitting fiber monofilaments, with the two ends of the multiple image-transmitting fiber monofilaments arranged in a corresponding order in a layered manner to form an image-transmitting interface. The two ends of the light-transmitting fiber form a light-transmitting interface, and the light-transmitting interface is disposed in the middle of the image-transmitting interface to form a fiber optic interface. The middle portions of the image-transmitting fiber and the light-transmitting fiber are randomly combined to form a flexible fiber segment. The sheath includes a flexible sleeve and an interface sleeve. The flexible sleeve covers the outer periphery of the flexible fiber segment, and the interface sleeve covers the outer periphery of the fiber optic interface. The flexible sleeve is connected to the interface sleeve.

[0008] By adopting the above technical solution, the image transmission interface formed by multiple image transmission fiber monofilaments arranged sequentially in layers at both ends of the image transmission fiber can transmit the image at one end of the image transmission interface to the other end, forming a transmitted image consistent with the original image. This allows for observation and recording of the image at the other end from one end of the fiber bundle, enabling observation and recording of images in confined spaces, narrow slits, or hazardous environments. Furthermore, the light transmission interface located in the middle of the image transmission interface can transmit illumination light from an external lighting source to the other end of the image transmission fiber, effectively improving the lighting environment around the image transmission interface and enhancing the illumination of the other end of the image transmission fiber. The imaging effect is improved by using a light transmission interface located in the middle of the image transmission interface and integrating multiple image transmission fiber monofilaments directly into the image transmission fiber. This eliminates the need for the light transmission fiber to occupy space within the endoscope and reduces its impact on the diameter of the image transmission fiber, allowing for a smaller endoscope diameter and improving its ability to enter confined spaces. Furthermore, the use of a flexible fiber segment formed by the disordered combination of the image transmission fiber and the light transmission fiber in the middle enhances the flexibility of the flexible fiber segment. The flexible fiber segment is further encased in a flexible sleeve, ensuring that the endoscope can pass through more complex and tortuous channels into confined spaces in complex environments, effectively improving the environmental adaptability of the fiber bundle.

[0009] In one specific implementation scheme, the cross-section of the optical fiber interface is square or circular, and the cross-section of the optical transmission interface is circular.

[0010] By adopting the above technical solutions, the fiber optic interface with a square cross-section has a smaller minimum side distance, making it easier to enter narrow slit environments. The fiber optic interface with a circular cross-section allows for a more compact arrangement of the single filaments of the transmission fiber, reducing the maximum side distance of the fiber optic interface and enabling it to enter even smaller, confined spaces. The light transmission interface with a circular cross-section can transmit more illumination light with a smaller light transmission interface area, improving the illumination efficiency of the illumination light.

[0011] In one specific implementation, the center of the optical transmission interface is located at the intersection of the diagonals of the optical fiber interface or at the center of the circle.

[0012] By adopting the above technical solution, using the center of the optical transmission interface to set the structure at the intersection of the diagonals of the square optical fiber interface or at the center of the circular optical fiber interface, the illumination light can be symmetrically distributed in the corresponding area of ​​the image transmission interface, making the illumination light distribution in different areas around the end of the image transmission interface more uniform and ensuring the imaging effect in the corresponding area of ​​the image transmission interface.

[0013] In one specific implementation, the single filaments of the image transmission fiber within the same layer of the image transmission interface are linearly and closely arranged.

[0014] By adopting the above technical solution and utilizing the linear and compact arrangement of single filaments of the same layer of image transmission fiber, the arrangement density of single filaments of the image transmission fiber in the image transmission interface can be increased with a smaller layer height. Under the premise of equal imaging quality, the size of the image transmission interface can be reduced, the ability of the image transmission interface to enter narrow spaces can be improved, and the imaging quality of the image transmission fiber can be better guaranteed.

[0015] In one specific implementation, the single filaments of the image transmission fiber in adjacent layers of the image transmission interface are arranged in a staggered manner.

[0016] By adopting the above technical solution and utilizing the staggered arrangement of adjacent image transmission fiber filaments, the interlayer height of the image transmission fiber filaments can be reduced, further increasing the arrangement density of the imaging fiber filaments in the image transmission interface, thereby reducing the size of the imaging interface and improving the imaging quality.

[0017] The method for manufacturing the optical fiber bundle for transmitting light and images provided in this application adopts the following technical solution:

[0018] A method for manufacturing a light-transmitting and image-transmitting fiber bundle according to this application includes the following steps: arranging the image-transmitting fiber monofilaments into a loop including a monofilament layer of a predetermined width, and applying adhesive to fix the monofilament layer portion to form an interface monofilament; stacking the interface monofilaments of the predetermined width and applying adhesive to fix them to form an image-transmitting interface segment with a reserved light-transmitting interface hole; cutting the image-transmitting interface segment to form the image-transmitting interface; winding the light-transmitting fiber and manufacturing the light-transmitting interface segment; cutting the light-transmitting interface segment to form the light-transmitting interface; placing the light-transmitting interface in the reserved light-transmitting interface hole to manufacture the fiber interface; incorporating the middle portion of the light-transmitting fiber into the image-transmitting fiber to form the flexible fiber segment; fitting the flexible sleeve onto the flexible fiber segment, fitting the interface sleeve onto the fiber interface, and fixing the interface sleeve onto the flexible sleeve.

[0019] By adopting the above technical solution, a monofilament sheet formed by fixing monofilament layers arranged in image transmission fiber can be easily formed into an image transmission interface segment of a predetermined shape. By cutting the image transmission interface segment to form the image transmission interfaces at both ends of the flexible fiber segment, it is possible to ensure that the image transmission fiber monofilaments in the image transmission interfaces at both ends of the flexible fiber segment are interconnected, thus ensuring the fidelity of the transmitted image. By setting the optical transmission interface in the reserved optical transmission interface hole, the optical transmission interface can be conveniently set in the middle of the image transmission interface, ensuring the accuracy of the optical transmission interface position.

[0020] In one specific implementation scheme, the interface chip includes an image transmission layer chip and a pre-drilled hole layer chip. The width of the image transmission layer chip is determined according to the external dimensions of the light transmission interface and the stacking position of the image transmission layer chip. The width of the pre-drilled hole layer chip is determined according to the external dimensions of the light transmission interface, the shape and size of the pre-drilled light transmission interface hole, and the stacking position of the pre-drilled hole layer chip.

[0021] By adopting the above technical solution, image transmission layer monoliths of different widths can be stacked in different positions to easily form image transmission interfaces of different shapes and sizes. By using pre-drilled hole layer monoliths of different widths and stacking them in different positions, pre-drilled optical transmission interface holes of different shapes and sizes can be formed at the same time as image transmission interfaces of different shapes and sizes. This allows for easy control of the external dimensions of the optical transmission interface and the shape and size of the pre-drilled optical transmission interface holes, thereby facilitating the fabrication of optical transmission and image transmission fiber bundles suitable for different usage environments and ensuring better connection between the optical transmission interface and the pre-drilled optical transmission interface holes.

[0022] In one specific implementation scheme, the light transmission interface is a square with a side length of a, and the width of the image transmission layer is a; the reserved light transmission interface hole is a circle with a diameter of D, the diameter of the image transmission fiber filament is d, and there are two reserved hole layer sheets in each stacking layer i, and the width of each reserved hole layer sheet is... .

[0023] By adopting the above technical solution, and by using the pre-reserved hole layer monoliths obtained by calculation to be superimposed and fixed, a square light transmission interface with a side length of a can be easily formed, and a circular pre-reserved light transmission interface hole with a diameter of D can be formed at the center of the light transmission interface.

[0024] In one specific feasible implementation, the method for manufacturing the optical fiber interface is as follows: using glue to attach the optical transmission interface to the reserved optical transmission interface hole, heating and curing, and then polishing the end face.

[0025] By adopting the above technical solutions and utilizing the heating curing process, the curing speed of the adhesive can be increased by using higher temperatures, thereby improving the structural strength and stability of the fiber optic interface and thus extending the service life of the optical fiber bundle for light and image transmission. By polishing the end face of the fiber optic interface, the light transmission performance of the end face of the fiber optic interface can be improved, and the distortion of the image transmitted through the end face of the fiber optic interface can be reduced.

[0026] The fiber optic endoscope provided in this application uses the optical fiber bundle for transmitting light and images provided in this application.

[0027] By adopting the above technical solution and utilizing the optical fiber bundle for light transmission and image transmission of this application, it is possible to introduce illumination light and export image information through a single optical fiber bundle. Therefore, it is possible to observe and record image information in a smaller space, ensure the illumination effect of the image area, and improve the quality of the acquired image.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. By using image transmission fiber monofilaments arranged in corresponding order in a layered manner, the image reproduction of the image transmission at both ends of the image transmission interface can be improved, and the image accuracy of the fiber transmission bundle can be improved.

[0030] 2. By utilizing the light transmission interface located in the middle of the image transmission interface, illumination light can be introduced from the middle of the image transmission interface, ensuring the uniformity of illumination light distribution in the corresponding area of ​​the image transmission interface and improving the quality of the image acquired by the image transmission interface.

[0031] 3. By using the fiber optic interface, which is a combination of the image and light transmission interfaces at both ends of the optical fiber bundle, and the flexible fiber segment formed by the disordered combination of the image and light transmission fibers in the middle, the fiber density of the fiber optic interface can be increased, allowing the fiber optic interface to enter a smaller cavity or narrow slit, while maintaining the flexibility of the flexible fiber segment, so that the fiber bundle can pass through a more tortuous and complex environment.

[0032] 4. The method of using a linearly close arrangement of optical fiber filaments to form an interface monolayer, and then stacking the optical fiber filaments of the interface monolayer in a staggered manner to form an image transmission interface, and fixing the light transmission interface in a reserved light transmission interface hole, can easily produce optical fiber interfaces with corresponding filament positions, increase the arrangement density of optical fiber filaments in the optical fiber interface, and reduce the diameter of the optical fiber bundle. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of one embodiment of the optical fiber bundle for transmitting light and images according to this application.

[0034] Figure 2 This is a schematic diagram of the optical fiber structure of one embodiment of the optical fiber bundle for transmitting light and images according to this application.

[0035] Figure 3 This is a schematic diagram of the fiber optic interface end face of one embodiment of the optical fiber bundle for transmitting light and images according to this application.

[0036] Figure 4 This is a flowchart illustrating one embodiment of the method for manufacturing the optical fiber bundle for transmitting light and images according to this application.

[0037] Figure 5 This is a schematic diagram of the winding of a single filament of an image-transmitting fiber in one embodiment of the optical fiber bundle fabrication method of this application.

[0038] Figure 6 This is a schematic diagram of the optical transmission interface fabricated in one embodiment of the optical fiber bundle fabrication method of this application.

[0039] Figure 7 This is a schematic diagram of the interface monolithic stacking state of one embodiment of the optical fiber bundle fabrication method of this application.

[0040] Figure 8 This is a schematic diagram of the optical transmission interface fabricated in another embodiment of the optical fiber bundle fabrication method of this application.

[0041] Explanation of reference numerals in the attached diagram: 1. Image transmission fiber; 11. Single filament of image transmission fiber; 12. Image transmission interface; 13. Interface monolith; 131. Single filament of image transmission layer; 132. Single filament of reserved hole layer; 14. Reserved light transmission interface hole; 2. Light transmission fiber; 21. Light transmission interface; 3. Sheath tube; 31. Flexible sleeve; 32. Interface sleeve; 4. Fiber interface; 5. Flexible fiber segment; 6. Single filament fiber arrangement tray; 61. Single filament adhesive mounting frame. Detailed Implementation

[0042] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] One embodiment of the optical fiber bundle for transmitting light and images in this application is as follows: Figures 1 to 3 As shown, the system includes an image-transmitting fiber 1, a light-transmitting fiber 2, and a sheath 3. The image-transmitting fiber 1 connects one end of the image-transmitting fiber bundle to the other end, transmitting graphic information from one end of the bundle to the other, thus enabling observation or recording of the corresponding area at the other end from one end of the bundle. The light-transmitting fiber 2 also connects one end of the image-transmitting fiber bundle to the other end, transmitting illumination light from one end to the other end, and illuminating the corresponding area at the other end by exiting from the end face, thereby improving the quality of the image observed or recorded through the image-transmitting fiber 1.

[0045] The image transmission fiber 1 is typically composed of multiple image transmission fiber monofilaments 11 with a diameter of 5-100 micrometers. The image transmission fiber monofilament 11 can be a multi-component glass fiber filament, or a fiber filament made of other materials such as quartz fiber filament or polymer fiber filament. The two ends of the multiple image transmission fiber monofilaments 11 are arranged in a corresponding order in a layered manner and fixed together to form a rigid image transmission interface 12 with a fixed shape.

[0046] The light transmission fiber 2 can be a single illumination fiber filament or a combination of multiple illumination fiber filaments. When using a single illumination fiber filament as the light transmission fiber 2, a silica fiber filament or polymer fiber filament with a diameter of about 0.5 mm can typically be used. When using multiple illumination fiber filaments to form the light transmission fiber 2, multiple fiber filaments with a diameter of 20-100 micrometers can be used. Specifically, fiber filaments of various materials such as polymer fiber filaments, multi-component glass fiber filaments, or silica fiber filaments can be used.

[0047] The two ends of the optical fiber 2 are solidified to form rigid optical transmission interfaces 21. The optical transmission interfaces 21 are fixed in the middle of the image transmission interface 12 and are fixed together with the image transmission interface 12 to form a rigid optical fiber interface 4. Since the optical fiber interface 4 is formed by setting the optical transmission interface 21 in the middle of the image transmission interface 12, the optical transmission interface 21 is located within the range of the image transmission interface 12 and does not occupy additional space. Therefore, the space occupied by the optical fiber interface 4 is smaller, so it can be put into smaller cavities or narrower slits, effectively improving the application range of the optical fiber bundle for optical and image transmission in this application.

[0048] The flexible image transmission fiber monofilament 11 in the middle of the image transmission fiber 1 and the flexible illumination fiber monofilament in the middle of the light transmission fiber 2 are merged together without being fixed to form a disordered combination of flexible fiber segments 5. This allows the flexible fiber segments 5 to be bent more easily, making it easier for the fiber interface 4 to pass through tortuous chambers or narrow slit channels to enter the depths of complex environments for observation of deep targets.

[0049] The sheath tube 3 is fitted over the image-transmitting fiber 1 and the light-transmitting fiber 2. The sheath tube 3 includes a flexible sleeve 31, usually made of flexible materials such as rubber, silicone, or plastic, and an interface sleeve 32, usually made of metal. The inner layer of the flexible sleeve 31 may also have a protective inner lining layer on one side. The flexible sleeve 31 covers the outside of the flexible fiber segment 5, constraining and protecting the flexible fiber segment 5 while maintaining the flexibility of the light-transmitting and image-transmitting fiber bundle. The interface sleeve 32 covers the outer periphery of the fiber interface 4, protecting the fiber interface 4 while improving the ability of the end of the light-transmitting and image-transmitting fiber bundle to pass through narrow environments, and facilitating the connection between the end of the light-transmitting and image-transmitting fiber bundle and the end of the end of the endoscope's objective lens, eyepiece, and light source interface.

[0050] In some embodiments of the optical fiber bundle for transmitting light and images in this application, such as Figure 2 and Figure 3 As shown, the cross-section of the optical fiber interface 4 is square. The outer periphery of the optical fiber interface 4 is an image transmission interface 12 formed by the layered arrangement of the ends of several image transmission fiber monofilaments 11. The layer width of each layer of image transmission fiber monofilaments 11 in the image transmission interface 12 is the same.

[0051] The cross-section of the fiber optic interface 4 can also be set to a circular, polygonal or other shapes. The outer periphery of the fiber optic interface 4 is a corresponding shape of image transmission interface 12 formed by the layered arrangement of the ends of several image transmission fiber monofilaments 11. The number of image transmission fiber monofilaments 11 in each layer of the image transmission interface 12 is set according to the external shape of the image transmission interface 12. The image transmission fiber monofilaments 11 in different layers are set in the center so that the ends of the image transmission fiber monofilaments 11 are arranged in a circular fiber optic interface 4.

[0052] The light transmission interface 21 is located in the middle of the image transmission interface 12. The light transmission interface 21 is formed from the end of a single light transmission fiber filament, and the cross-section of the light transmission interface 21 is circular. The light transmission interface 21 can be formed from the end of a single illumination fiber filament, or it can be formed by combining the ends of multiple illumination fiber filaments. Preferably, it is formed by fixing the end of a single illumination fiber filament to the middle of the image transmission interface 12.

[0053] In a preferred embodiment of the optical fiber bundle for transmitting light and images in this application, such as Figure 3As shown, the optical transmission interface 21 is fixed at the center of the image transmission interface 12, meaning the center of the optical transmission interface 21 coincides with the center of the fiber optic interface 4. Specifically, for the circular optical transmission interface 21 and the square fiber optic interface 4, the center of the optical transmission interface 21 is located at the intersection of the two diagonals of the fiber optic interface 4; for the circular optical transmission interface 21 and the square fiber optic interface 4, the center of the optical transmission interface 21 is set at the center of the fiber optic interface 4, forming a concentric circle structure. In this way, the illumination light introduced through the optical transmission interface 21 diffuses evenly from the center of the image transmission interface 12, making the illumination light at the corresponding part of the image transmission interface 12 more uniform, which helps to improve the uniformity of the image brightness observed through the image transmission interface 12 and improve the image quality.

[0054] In some embodiments of the optical fiber bundle for transmitting light and images in this application, such as Figure 3 As shown, in each layer of the image transmission fiber filaments 11 arranged in the image transmission interface 12, multiple image transmission fiber filaments 11 are linearly and closely arranged to form a layer of image transmission fiber filaments 11 without overlap or gaps. Specifically, each layer of image transmission fiber filaments 11 can be arranged in a straight line, with the centers of each image transmission fiber filament 11 aligned on the same straight line, and the distance between the centers of two adjacent image transmission fiber filaments 11 equal to the diameter of the image transmission fiber filament 11. This makes the intralayer arrangement of the image transmission fiber filaments 11 more regular and the intralayer arrangement density higher, which is beneficial to improving the resolution of the image transmitted through the image transmission interface 12 and improving the image viewing effect.

[0055] As one specific implementation of the optical fiber bundle for transmitting light and images in this application, such as Figure 3 As shown, the image transmission interface 12 is composed of a layered structure of multiple image transmission fiber filaments 11. Furthermore, the multiple image transmission fiber filaments 11 in adjacent layers are staggered with each other, so that the image transmission fiber filament 11 in the upper layer is located between two adjacent image transmission fiber filaments 11 in the lower layer. This further compresses the interlayer distance of the layered structure of adjacent image transmission fiber filaments 11, reduces the gap between image transmission fiber filaments 11, further increases the arrangement density of image transmission fiber filaments 11 in the image transmission interface 12, and further improves the resolution of the image transmitted by the image transmission interface 12.

[0056] One embodiment of the method for fabricating the optical fiber bundle for transmitting light and images according to this application is as follows: Figure 4 As shown, it includes the following steps:

[0057] a. such as Figure 5As shown, the image-transmitting fiber monofilament 11 is wound around the fiber monofilament spool 6 to form a loop of the image-transmitting fiber monofilament 11. During the winding process, to ensure that the image-transmitting fiber monofilament 11 forms a single-layer arrangement of loops on the fiber monofilament spool 6, it is necessary to ensure that each turn of the image-transmitting fiber monofilament 11 is tightly arranged sequentially on the single-layer adhesive frame 61, forming a monofilament layer of image-transmitting fiber monofilament 11 of a predetermined width. Epoxy adhesive is applied to a predetermined length of the monofilament layer on the single-layer adhesive frame 61, covering the gaps on both sides of adjacent image-transmitting fiber monofilaments 11. After the epoxy adhesive cures, multiple image-transmitting fiber monofilaments 11 are bonded and fixed together to form an interface single-layer 13 formed by curing a single layer of image-transmitting fiber monofilaments 11. The curing of the epoxy adhesive can be carried out under natural temperature conditions or under a certain temperature, such as 120°C.

[0058] When winding and arranging the fiber monofilament on the fiber monofilament winding tray 6, a single wire loop of a set width layer can be wound on the fiber monofilament winding tray 6, or multiple wire loops of a set width layer arranged at intervals can be wound on the fiber monofilament winding tray 6. Thus, multiple image transmission fiber monofilament 11 wire loops containing interface single pieces 13 of a set width can be obtained by winding the wire once and applying adhesive and curing once on the fiber monofilament winding tray 6.

[0059] b. According to the design requirements, interface pieces 13 of a certain width are stacked together. Preferably, such as... Figure 6 As shown, the image transmission fiber filaments 11 in adjacent interface single pieces 13 are staggered with each other, and the image transmission fiber filaments 11 of the upper layer are superimposed between the two adjacent image transmission fiber filaments 11 of the lower layer, so that the arrangement between the image transmission fiber filaments 11 is more compact. Then the filament rings are straightened and merged together.

[0060] Specifically, after applying epoxy adhesive to the surface of the interface piece 13, the interface pieces 13 of a predetermined width are stacked and pressed together in a predetermined order and position. After the epoxy adhesive cures, an image transmission interface segment with a predetermined shape and a reserved light transmission interface hole 14 in the center is formed. The shape of the image transmission interface segment and the shape of the reserved light transmission interface hole 14 can be controlled by selecting interface pieces 13 of different widths and numbers, and by controlling the relative positions between adjacent interface pieces 13.

[0061] c. Cut the image interface segment in the middle to obtain the following: Figure 6 The image transmission interface 12 is shown.

[0062] The optical fiber 2 is wound, which can also be done on the fiber optic monofilament arrangement spool 5. When winding the optical fiber 2 formed from a single illumination fiber monofilament, the illumination fiber monofilaments are usually arranged at intervals, and the light transmission interface segment is formed by applying adhesive and curing it on the single adhesive mounting spool 51. When winding the optical fiber 2 formed from multiple illumination fiber monofilaments, the illumination fiber monofilaments can be wound using a method similar to that used for winding the image transmission fiber monofilament 11 to form an interface spool 13, and the interface spools 13 are then fixed with adhesive to form the light transmission interface segment.

[0063] d. Cut the light transmission interface section along the middle to form the light transmission interface 21.

[0064] e. Apply epoxy resin to the outer periphery of the light transmission interface 21 at both ends of the optical fiber 2. Insert the two light transmission interfaces 21 into the reserved light transmission interface holes 14 at both ends of the image transmission fiber 1, respectively. After the epoxy resin cures, fix the light transmission interfaces 21 in the reserved light transmission interface holes 14 to obtain the optical fiber interfaces 4 located at both ends of the optical fiber bundle. Straighten and merge the filament loops of the optical fiber 2 into the image transmission fiber 1 to form a randomly arranged flexible optical fiber segment 4.

[0065] f. Armoring the optical fiber: Utilizing the elasticity of the flexible sleeve 31, the flexible sleeve 31 is fitted onto the flexible optical fiber segment 5 through the optical fiber interface 4. Then, the interface sleeve 32 is fitted onto the optical fiber interface 4, and the inner end of the interface sleeve 32 is pressed and fixed onto the flexible sleeve 31. The gap between the interface sleeve 32 and the flexible sleeve, as well as the gap between the interface sleeve 32 and the optical fiber interface 4, are sealed with sealant to obtain the finished optical fiber bundle for light transmission and image transmission of this application.

[0066] In some embodiments of the method for fabricating the optical fiber bundle for transmitting light and images in this application, such as Figure 6 As shown, the interface unit 13 constituting the image transmission interface 12 includes an image transmission layer unit 131 that does not participate in forming the two sides of the reserved light transmission interface hole 14, and a reserved hole layer unit 132 that participates in forming the two sides of the reserved light transmission interface hole 14. When stacking the interface units 13, image transmission layer units 131 of appropriate width are selected for stacking according to the shape of the image transmission interface 12 and the stacking position of the interface units 13; at least two reserved hole layer units 132 of appropriate width are selected for stacking according to the shape of the image transmission interface 12, the shape of the reserved light transmission interface hole 14, and the stacking position of the interface units 13. In this way, the shape and size of the image transmission interface 12 can be easily formed from the outer image transmission layer unit 131, the outer positions of the inner image transmission layer unit 131, and the outer positions of the reserved hole layer units 132, and the shape and size of the reserved light transmission interface hole 14 can be easily formed from the inner positions of the reserved hole layer units 132.

[0067] In a preferred embodiment of the method for manufacturing the optical fiber bundle for transmitting light and images according to this application, such as Figure 6 As shown, the external shape of the image transmission interface 12 is a square with a side length of a, the reserved optical transmission interface hole 14 is a circle with a diameter of D, and the diameter of the image transmission fiber monofilament 11 is d.

[0068] The width of the image transmission layer 131 used to fabricate the image transmission interface 12 is the side length a of the image transmission interface 12; the width of the reserved hole layer 132 used is determined according to the side length a of the image transmission interface 12, the stacking layer i of the reserved hole layer 132, the diameter d of the image transmission fiber filament 11, and the diameter D of the reserved optical transmission interface hole 14.

[0069] In a specific method for manufacturing the image transmission interface 12, two pre-drilled hole layer monoliths 132 are placed separately in each stacking layer i. The spaces between the two pre-drilled hole layer monoliths 132 in different stacking layers are combined to form a pre-drilled light transmission interface hole 14. The width a of each pre-drilled hole layer monolith 132 in different stacking layers i is... i According to the formula

[0070] (1)

[0071] Sure.

[0072] Equation (1) is a simplified calculation formula. In the formula, the diameter d of the image transmission fiber monofilament 11 is used as an approximation of the stacking height of the reserved hole layer monofilament 132 for simplified calculation. This simplified calculation result will cause deformation of the reserved light transmission interface hole 14, and the deformation of the reserved light transmission interface hole 14 will be greater closer to the upper part of the reserved light transmission interface hole 14. In order to improve the accuracy of the reserved light transmission interface hole 14 on the fabricated image transmission interface 12, the value of d in Equation (1) can be corrected.

[0073] like Figure 7 As shown, the actual stacking height of the pre-drilled hole layer 132 is the vertical distance d' between the circular cores of two adjacent image transmission fiber monofilaments 11. The value of d' can be determined by the following formula:

[0074] (2)

[0075] By replacing d in equation (1) with d' in equation (2), we get:

[0076] (3)

[0077] The width a of the pre-reserved hole layer 132 of the i-th layer, calculated according to formula (3), is... i The accuracy is higher, and the reserved light transmission interface hole 14 formed by the pre-reserved hole layer monolith 132 of this width is closer to the setting requirements.

[0078] During the stacking process of the pre-drilled hole layer monoliths 132, the outer sides of two pre-drilled hole layer monoliths 132 in the corresponding stacked layers are aligned with the outer sides of the pre-drilled hole layer monoliths 132 in the next stacked layer, or the two sides of the image transmission layer monolith 131, while maintaining the staggered positions of the image transmission fiber monofilaments 11 in adjacent layers. A fixed connection is formed between the pre-drilled hole layer monoliths 132 in adjacent layers, or between the pre-drilled hole layer monoliths 132 and the image transmission layer monolith 131, by applying epoxy adhesive.

[0079] The external shape of the image transmission interface 12 can also be set as follows: Figure 8 As shown in the circle, the width of the image transmission layer 131 used to make the image transmission interface 12 is no longer the same. It also needs to be calculated according to the stacking layers of the image transmission layer 131. The specific calculation method can be based on a principle similar to the calculation method of the reserved hole layer 132, which will not be elaborated in this specification.

[0080] In some embodiments of the method for manufacturing the optical fiber bundle for transmitting light and images in this application, the specific method for manufacturing the optical fiber interface 4 is as follows: Epoxy resin is applied to the outer periphery of the optical fiber interface 21 at one end of the optical fiber 2. The optical fiber interface 21 is then inserted into a pre-reserved optical fiber interface hole 14 on the image fiber interface 12 at one end of the image fiber 1, making the end of the optical fiber interface 21 flush with the end of the image fiber interface 12. From the optical fiber interface 21 to the optical fiber interface 21 at the other end of the optical fiber 2, the optical fiber 2 is gradually incorporated into the image fiber 1. Then, epoxy resin is applied to the outer periphery of the optical fiber interface 21 at the other end of the optical fiber 1. The optical fiber interface 21 is then inserted into a pre-reserved optical fiber interface hole 14 on the image fiber interface 12 at the other end of the image fiber 1, making the end of the optical fiber interface 21 flush with the end of the image fiber interface 12.

[0081] The optical transmission interface 21 is fixed to the middle of the image transmission interface 12 with epoxy adhesive, forming the fiber optic interface 4. Epoxy adhesive can cure naturally at room temperature, but the curing time at room temperature is long, resulting in low step-by-step processing efficiency and potentially causing the relative positions of the optical transmission interface 21 and the image transmission interface 12 to shift before the epoxy adhesive cures. Therefore, in actual processing, after inserting the optical transmission interface 21, the image transmission interface 12 is often heated to a higher temperature, such as around 120°C. This high temperature environment accelerates the curing speed of the epoxy adhesive, increases its curing strength, and ensures the structural quality of the fiber optic interface 4.

[0082] After the epoxy adhesive has cured, the end face of the fiber optic interface 4 is polished to improve the flatness and transparency of the end face of the fiber optic interface 4. This can improve the light transmission efficiency of the end face of the fiber optic interface 4, reduce the distortion of image information transmitted through the end face of the fiber optic interface 4, and improve the observation and recording effect of the optical fiber bundle for light transmission and image transmission in this application.

[0083] The external shape of the image transmission interface 12 can also be formed by further processing based on the square shape. At this time, before grinding the end face of the fiber optic interface 4, it is necessary to cut and trim the outer periphery of the fiber optic interface 4 to remove the unwanted areas on the outside of the fiber optic interface 4 and the corresponding image transmission fiber monofilament 11, so as to form the set outer periphery shape.

[0084] One embodiment of the fiber optic endoscope of this application utilizes a fiber optic bundle for light transmission and image acquisition, as described in any embodiment of this application. An objective lens is mounted at one end of the fiber optic bundle, and an eyepiece or image acquisition device is mounted at the other end. A light source or external light source interface is also installed, resulting in the fiber optic endoscope of this application, capable of being used for small-space inspections. The fiber optic endoscope of this application has an image bundle diameter as small as 0.8 mm, allowing it to pass through complex external environments and enter even more confined spaces for observation or image acquisition. Furthermore, the endoscope does not require a power supply, is resistant to high and low temperatures, and is resistant to electromagnetic radiation and nuclear radiation, thus having a wider range of applications.

[0085] In the description of this invention, the terms "one embodiment," "specific embodiment," "preferred embodiment," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this invention, 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.

[0086] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A light transmitting image transmitting fiber bundle for use in a fiber optic endoscope, characterized by: The application relates to a flexible optical fiber interface, which comprises an image transmission fiber (1), a light transmission fiber (2) and a sheath tube (3), the image transmission fiber (1) comprises a plurality of image transmission fiber filaments (11), the two ends of the plurality of image transmission fiber filaments (11) are arranged in a corresponding order in a layer shape, and are formed into an image transmission interface (12); the two ends of the light transmission fiber (2) are formed into a light transmission interface (21); the two ends of the light transmission interface (21) are respectively arranged in the middle of the two ends of the image transmission interface (12), are fixed at the center position of the image transmission interface (12), and together form an optical fiber interface (4) with the image transmission interface (12); the middle part of the image transmission fiber (1) and the light transmission fiber (2) are combined in disorder, and are formed into a flexible optical fiber section (5); the sheath tube (3) comprises a flexible sheath tube (31) and an interface sheath tube (32), the flexible sheath tube (31) is wrapped around the outer periphery of the flexible optical fiber section (5), and the interface sheath tube (32) is wrapped around the outer periphery of the optical fiber interface (4); and the flexible sheath tube (31) is connected with the interface sheath tube (32).

2. The light-transmitting image-transmitting fiber bundle of claim 1, wherein: The cross section of the optical fiber interface (4) is square or circular, and the cross section of the light transmission interface (21) is circular.

3. The light-transmitting image-transmitting fiber-optic bundle of claim 2, wherein: The center of the light transmission interface (21) is located on the intersection of the diagonal lines of the optical fiber interface (4) or the center of the optical fiber interface (4).

4. The light-transmitting imaging fiber bundle of claim 1, wherein: The image transmission fiber filaments (11) in the same layer of the image transmission interface (12) are linearly and closely arranged.

5. The light-transmitting image-transmitting fiber-optic bundle of claim 4, wherein: The image transmission fiber filaments (11) in adjacent layers of the image transmission interface (12) are arranged in a staggered manner.

6. A method of making a light-transmitting image-transmitting fiber bundle according to any one of claims 1-5, characterized by: The application further relates to a manufacturing method of the flexible optical fiber interface. The image transmission fiber filaments (11) are arranged into a filament ring comprising a single filament layer with a set width, are glued and fixed on the single filament layer part, and are formed into an interface single piece (13); The interface single pieces (13) with a set width are laminated and glued and fixed, and are formed into an image transmission interface section with a reserved light transmission interface hole (14); The image transmission interface section is cut, and the image transmission interface (12) is formed; The light transmission fiber (2) is wound, and a light transmission interface section is manufactured; The light transmission interface section is cut, and the light transmission interface (21) is formed; The light transmission interface (21) is arranged in the reserved light transmission interface hole (14), the optical fiber interface (4) is manufactured, the middle part of the light transmission fiber (2) is integrated into the image transmission fiber (1), and the flexible optical fiber section (5) is formed; The flexible sheath tube (31) is installed on the flexible optical fiber section (5), the interface sheath tube (32) is installed on the optical fiber interface (4), and the interface sheath tube (32) is fixed on the flexible sheath tube (31).

7. The method of claim 6, wherein: The interface single piece (13) comprises an image transmission layer single piece (131) and a reserved hole layer single piece (132), the width of the image transmission layer single piece (131) is determined according to the shape size of the image transmission interface (12) and the lamination position of the image transmission layer single piece (131), and the width of the reserved hole layer single piece (132) is determined according to the shape size of the light transmission interface (21), the shape size of the reserved light transmission interface hole (14) and the lamination position of the reserved hole layer single piece (132).

8. The method of claim 7, wherein: The image transmission interface (12) is a square with a side length of a, the width of the image transmission layer monolithic piece (131) is a; the reserved light transmission interface hole (14) is a circle with a diameter of D, the diameter of the image transmission fiber monofilament (11) is d, each of the reserved hole layer monolithic piece (132) of the stacking level i has two, the width of each reserved hole layer monolithic piece (132) is .

9. The method of claim 6, wherein: The method for manufacturing the optical fiber interface (4) is: using glue to bond the light transmission interface (21) in the pre-reserved light transmission interface hole (14), and after warming and curing, end face polishing is performed.

10. An optical fiber endoscope characterized by comprising: An optical fiber bundle comprising the light transmission and image transmission fiber bundle according to any one of claims 1-5.

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