Illumination adjusting device based on multimode optical fiber

Abstract

The invention discloses an illumination adjusting device based on a multimode optical fiber, and belongs to the technical field of optical machinery. According to the illumination adjusting device based on the multimode optical fiber, due to the highly-integrated design, optical transmission of the multimode optical fiber, a multi-optical-path adjusting mechanism and a control unit are optimized and integrated into a compact module, and the size and the structural complexity of the device are remarkably reduced; the light spot size, angle and divergence of emergent light of the multimode optical fiber can be quickly and flexibly adjusted, and the multimode optical fiber has the characteristics of high transmission efficiency, compact structure and convenience in operation. The device is particularly suitable for the field of fluorescence imaging, the size, angle and divergence of light spots are adjusted through a highly-integrated pure mechanical structure, an effective light source is provided for a fluorescence microscope and biomedical research, and the requirement of high-resolution microscopic imaging for fine regulation and control of a light field is met.

Description

Technical Field

[0001] The present invention relates to the field of optomechanical technology, and specifically to an illumination adjustment device based on multimode optical fiber, which is particularly suitable for the field of fluorescence imaging. It adjusts the size, angle and divergence of the light spot through a highly integrated pure mechanical structure, providing an effective light source for fluorescence microscopy and biomedical research. Background Art

[0002] Fluorescence imaging technology uses laser excitation of fluorescent dyes or fluorescent proteins to achieve high-resolution, visual observation of biological molecules and cell structures, and is widely used in biomedical research, disease diagnosis, and drug development. Traditional fluorescence imaging illumination systems mostly use free-space optical paths, adjusting the beam parameters through multiple optomechanical components (such as lens groups, reflectors, and mechanical apertures). However, this design has significant limitations: free-space transmission is susceptible to environmental interference (such as vibration and thermal drift), resulting in reduced beam stability; traditional systems require the construction of a large number of optomechanical components (such as independent lens holders, rotating stages, and slides), resulting in a complex structure, large space occupation, and high assembly and maintenance costs; in addition, the coordinated adjustment of multiple independent components is cumbersome and lacks flexibility.

[0003] Fiber optic technology has been introduced into fluorescence imaging illumination systems due to its high transmission efficiency and flexibility. Existing fluorescence imaging illumination systems based on multimode fiber are mostly limited to simple light transmission. Adjusting the spot size, angle, and divergence still requires multiple optomechanical components or electrically controlled optical assemblies, resulting in complex systems and low integration.

[0004] Therefore, there is an urgent need for a highly integrated purely mechanical illumination adjustment device based on multimode optical fiber, which can achieve high-precision adjustment of the spot size, angle and divergence through a simplified mechanical structure, and provide a stable and flexible laser light source for fluorescence imaging. Summary of the Invention

[0005] In order to solve the above problems, the main purpose of the present invention is to provide a device that can quickly adjust the spot size, angle and divergence of the light emitted by a multimode optical fiber.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A lighting adjustment device based on multimode optical fiber includes a translation stage base, a first-layer translation platform, a second-layer translation platform, a lens mounting base, a lens mounting barrel, and a six-axis optical adjustment mount, wherein the first-layer translation platform is mounted on the translation stage base and can slide relative to the translation stage base in the left-right direction; the second-layer translation platform is mounted on the first-layer translation platform and can slide relative to the first-layer translation platform in the left-right direction; the lens mounting base is fixedly mounted on the second-layer translation platform and maintains the same motion state as the second-layer translation platform; the lens mounting base serves as an adapter, and the lens mounting barrel is assembled on its left side; the six-axis optical adjustment mount (OAF) is fixedly mounted on the translation stage base and is located on the left side of the lens mounting barrel; an achromatic lens is installed in the lens mounting barrel, and the six-axis optical adjustment mount is installed with a multimode optical fiber, and the light output direction of the optical fiber is toward the achromatic lens.

[0008] In the lighting adjustment device of the present invention, the displacement platform base as the supporting component of the device can be installed on any plane that meets the size of its installation surface by bolts and pins. In the lighting adjustment device of the present invention, the one-layer displacement platform and the displacement platform base can be slidably connected by guide rails. Two parallel precision guide rails are horizontally mounted on the displacement platform base, preferably a cross roller guide rail, which can maintain extremely high movement accuracy while also having an extremely high load-bearing capacity; one end of the cross roller guide rail is fixed to the displacement platform base by bolts, and the other end is connected to the one-layer displacement platform by bolts, so that the one-layer displacement platform can achieve its left and right movement in the horizontal direction relative to the displacement platform base.

[0009] Furthermore, a position card is installed on the side of the one-layer displacement platform, and a locking pressure plate is installed on the same side of the displacement platform base; the locking pressure plate is located on the outside of the position card. When the locking pressure plate is tightened using a screw, the position card cannot be moved, thereby achieving the effect of locking the movement of the one-layer displacement platform.

[0010] In the lighting control device of the present invention, the second-level displacement platform and the first-level displacement platform are slidably connected via guide rails. Two parallel precision guide rails are mounted horizontally above the first-level displacement platform. These are preferably cross-roller guide rails, which maintain extremely high movement accuracy while also possessing a high load capacity. These cross-roller guide rails are bolted to the first-level displacement platform at one end and connected to the second-level displacement platform at the other end via bolts, enabling the second-level displacement platform to move horizontally relative to the first-level displacement platform.

[0011] Furthermore, a compression spring base is provided on the right side of the second-layer displacement platform, and a through hole is correspondingly provided on the right side wall of the first-layer displacement platform; the compression spring base can be installed to the through hole on the right side of the first-layer displacement platform; a compression spring is installed on the left side of the compression spring base; the compression spring is located between the compression spring base and the second-layer displacement platform. Due to the elastic force of the compression spring, the second-layer displacement platform will always maintain a tendency to move to the left.

[0012] Furthermore, a fine-threaded nut is installed on the side of the second-layer displacement platform, and the fine-threaded nut is tightened by the pressure of the tightening screw; a fine-threaded hand screw is installed on the fine-threaded nut; a steel column is installed on the same side of the first-layer displacement platform; the steel column serves as a wear-resistant part and withstands the pressure from the fine-threaded hand screw on the second-layer displacement platform; by rotating the fine-threaded hand screw clockwise, the second-layer displacement platform will move to the right relative to the first-layer displacement platform, and by rotating the fine-threaded hand screw counterclockwise, the second-layer displacement platform will move to the left relative to the first-layer displacement platform under the action of the compression spring.

[0013] Furthermore, the lens mounting base mounted on the second-layer displacement platform is connected to the second-layer displacement platform via bolts.

[0014] Furthermore, a lens mounting barrel is mounted on the left side of the lens mounting base, and the two are connected by a thread. In some specific embodiments of the present invention, the right side of the lens mounting barrel is provided with an external thread, which cooperates with the internal thread on the left side of the lens mounting base to achieve assembly.

[0015] The six-axis optical adjustment frame can be installed with a multimode optical fiber, and the six-axis optical adjustment frame can realize multi-axis adjustment of the multimode optical fiber; the six-axis optical adjustment frame is fixedly installed above the base of the translation stage by bolts.

[0016] The present invention also provides a method for using the above-mentioned multi-mode optical fiber-based lighting adjustment device, comprising: before using the device, first fixing the base of the translation stage on a certain plane, usually by using bolts and positioning pins to install the base of the translation stage on a certain plane that matches the size of its installation surface, so as to complete the placement and installation of the device; then, inserting the multi-mode optical fiber into the optical fiber holder of the six-axis optical adjustment frame; after completing the installation of the optical fiber, by adjusting the XY axes of the six-axis optical adjustment frame, the optical fiber output can be made coaxial with the achromatic lens; observing the sharpness of the light spot edge at the target of the optical fiber light output, moving the second-layer translation platform (by rotating the fine-threaded hand screw), and adjusting the sharpness of the light spot edge to a relatively sharp level, thus completing the preliminary adjustment. Focus; if the edge of the light spot cannot be sharp at the same time, adjust the pitch angle of the six-axis optical adjustment frame until the sharpness of the edges of the light spot is the same; continue to adjust the rotation axis of the six-axis optical adjustment frame to adjust the rotation angle of the light spot; manually move one layer of displacement platform to slightly adjust the size of the light spot; the above steps may need to be repeated several times before they are adjusted to a satisfactory level; finally, observe the sharpness of the light spot edge at the optical fiber light output target, move the second layer of displacement platform (by rotating the fine-threaded hand screw), adjust the sharpness of the light spot edge to be very sharp, and complete the final focus; at this time, fix the first layer of displacement platform (tighten the screw on the locking pressure piece, and the movement of the first layer of displacement platform will be locked); the optical path adjustment is now complete.

[0017] The multimode fiber-based lighting adjustment device provided by the present invention utilizes highly integrated mechanical and optical design and precision manufacturing processes to achieve flexible adjustment of the spot size, angle, and divergence. It features high transmission efficiency, a compact structure, and easy operation. Compared to existing technologies, the present invention has the following advantages:

[0018] 1. Compact Structure and High System Integration: The lighting adjustment device of the present invention optimizes and integrates multimode fiber optic light transmission, multi-optical path adjustment mechanisms, and a control unit (if any) into a compact module through a highly integrated design, significantly reducing the size and structural complexity of the device. Compared with traditional lighting systems that rely on multiple independent optical components (such as lens groups, reflectors, apertures) or mechanical adjustment mechanisms, resulting in bulky systems and complex assembly, the present invention achieves seamless integration of light beam transmission, lighting adjustment, and system interfaces through innovative optical and mechanical designs. Multimode optical fiber plays a role in efficient light transmission and light field optimization, supporting high light flux and highly uniform illumination, while the integrated design of the device further simplifies the optical path layout, reducing the number of components and adjustment steps. This high level of integration not only makes the device easy to embed into compact optical systems (such as microscopes, portable testing equipment, and medical endoscopes), but also enhances compatibility with different optical instruments and testing platforms, facilitating rapid installation, disassembly, and functional expansion, significantly reducing system modification costs and maintenance difficulties, and is suitable for a variety of high-precision application scenarios such as laboratory research, industrial testing, and medical imaging.

[0019] 2. Multi-dimensional Lighting Adjustment: The lighting adjustment device of this invention, through sophisticated optical and mechanical design, enables multi-dimensional manual adjustment of the spot size, angle, and divergence. Compared to traditional lighting adjustment devices, which typically only support single-parameter adjustment or rely on complex optical components for a limited adjustment range, this invention significantly improves the flexibility of lighting control by integrating a multifunctional adjustment mechanism, meeting the demand for fine light field control required for high-resolution microscopy.

[0020] 3. Ease of operation: The lighting adjustment device of the present invention is intuitive to operate and allows smooth fine-tuning. It can achieve precise control without complex training, significantly improving operational efficiency and user experience. It is suitable for a variety of scenarios in laboratory research and industrial sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 2 is an overall structural diagram of a lighting adjustment device according to an embodiment of the present invention.

[0022] Figure 2 FIG. 2 is a disassembled structural diagram of a translation stage according to an embodiment of the present invention.

[0023] In the picture:

[0024] 101 - first-layer displacement platform, 102 - second-layer displacement platform, 103 - lens mounting base, 104 - lens mounting tube, 105 - six-axis optical adjustment frame, 106 - displacement stage base;

[0025] 201-Achromatic lens, 202-Fastening screw, 203-Steel column, 204-Position card, 205-First precision guide rail, 206-Locking pressure piece, 207-Second precision guide rail, 208-Third precision guide rail, 209-Fourth precision guide rail, 210-Fine thread thumb screw, 211-Compression spring base, 212-Compression spring, 213-Fine thread nut. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be further described below through examples in conjunction with the accompanying drawings, but the scope of the present invention is not limited in any way.

[0027] Reference Figure 1The lighting adjustment device of this embodiment comprises a first-layer displacement platform 101, a second-layer displacement platform 102, a lens mounting base 103, a lens mounting tube 104, a six-axis optical adjustment frame 105, and a displacement platform base 106. The displacement platform base 106, as a supporting component of the device, can be mounted on any plane that meets the size of its mounting surface by means of bolts and pins. The first-layer displacement platform 101 is mounted above the displacement platform base 106 and can slide relative to the displacement platform base 106 in the left-right direction. The second-layer displacement platform 102 is mounted above the first-layer displacement platform 101 and can slide relative to the first-layer displacement platform 106. The displacement platform 101 achieves relative sliding in the left and right directions; the lens mounting base 103 is installed above the second-layer displacement platform 102. It serves as an adapter and is fixed on the second-layer displacement platform 102, maintaining the same motion state as the second-layer displacement platform 102; the lens mounting barrel 104 is installed on the left interface of the lens mounting base 103 and is connected to the lens mounting base 103 through a threaded connection. The lens mounting barrel 104 provides an external thread and the lens mounting base 103 provides an internal thread; the six-axis optical adjustment frame 105 is installed on the displacement stage base 106 and maintains a fixed connection with the displacement stage base 106.

[0028] Reference Figure 1 、 Figure 2 A first precision guide rail 205 and a second precision guide rail 207 are horizontally mounted on the translation stage base 106. The precision guide rail is a cross roller guide rail that can maintain extremely high movement accuracy while also having an extremely high load capacity. One end of the first precision guide rail 205 and the second precision guide rail 207 are fixed to the translation stage base 106 by bolts, and the other end is connected to the first displacement platform 101 by bolts, so that the first displacement platform 101 can achieve its left and right movement in the horizontal direction relative to the translation stage base 106.

[0029] Reference Figure 1 、 Figure 2 A position card 204 is installed on the side of the first-layer displacement platform 101; a locking pressure piece 206 is installed on the side of the displacement platform base 106; the locking pressure piece 206 is located on the outside of the position card 204. The locking pressure piece 206 is tightened with a screw to prevent the position card 204 from moving, thereby achieving the effect of locking the movement of the first-layer displacement platform 101.

[0030] Reference Figure 1 、 Figure 2A third precision guide rail 208 and a fourth precision guide rail 209 are horizontally installed above the first-layer displacement platform 101. The precision guide rail is a cross-roller guide rail, which can maintain extremely high movement accuracy while also having extremely high load-bearing capacity; one end of the third precision guide rail 208 and the fourth precision guide rail 209 are fixed to the first-layer displacement platform 101 by bolts, and the other end is connected to the second-layer displacement platform 102 by bolts, so that the second-layer displacement platform 102 can achieve its left and right movement in the horizontal direction relative to the first-layer displacement platform 101.

[0031] Reference Figure 1 、 Figure 2 There is a compression spring base 211 on the right side of the second-layer displacement platform 102; the compression spring base 211 can be installed to the through hole on the right side of the first-layer displacement platform 101; a compression spring 212 is installed on the left side of the compression spring base 211; the compression spring 212 is located between the compression spring base 211 and the second-layer displacement platform 102. Due to the elastic force of the compression spring, the second-layer displacement platform 102 will always maintain a tendency to move to the left.

[0032] Reference Figure 1 、 Figure 2 A fine-threaded nut 213 is installed on the side of the second-layer displacement platform 102; the fine-threaded nut 213 is tightened by the pressure of the tightening screw 202; the fine-threaded nut 213 is installed with a fine-threaded hand screw 210; a steel column 203 is installed on the side of the first-layer displacement platform 101; the steel column 203 serves as a wear-resistant part and withstands the pressure from the fine-threaded hand screw 210 on the second-layer displacement platform 102; by rotating the fine-threaded hand screw 210 clockwise, the second-layer displacement platform 102 will move right relative to the first-layer displacement platform 101, and by rotating the fine-threaded hand screw 210 counterclockwise, the second-layer displacement platform 102 will move left relative to the first-layer displacement platform 101 under the action of the compression spring 212.

[0033] Reference Figure 1 A lens mounting base 103 is mounted on the second-layer displacement platform 102; the lens mounting base 103 is connected to the second-layer displacement platform 102 via bolts.

[0034] Reference Figure 1 A lens mounting barrel 104 is mounted on the side of the lens mounting base 103 ; the right side external thread of the lens mounting barrel 104 cooperates with the left side internal thread of the lens mounting base 103 to achieve assembly.

[0035] Reference Figure 1 、 Figure 2 An achromatic lens 201 is installed inside the lens mounting tube 104 .

[0036] Reference Figure 1The six-axis optical adjustment frame 105 can be used to install multi-mode optical fibers; the six-axis optical adjustment frame 105 can achieve multi-axis adjustment of multi-mode optical fibers; the six-axis optical adjustment frame 105 is fixedly mounted on the base 106 of the translation stage by bolts.

[0037] The specific use process of the lighting adjustment device of this embodiment is as follows:

[0038] Before using this device, you need to first install the translation stage base 106 on a plane that matches the size of its installation surface using bolts and positioning pins to complete the placement and installation of the device; then, insert the multimode optical fiber into the fiber holder of the six-axis optical adjustment frame 105; after completing the installation of the optical fiber, adjust the XY axis of the six-axis optical adjustment frame 105 to make the optical fiber light output coaxial with the achromatic lens 201; observe the sharpness of the light spot edge at the optical fiber light output target, rotate the fine-threaded thumb screw 210, adjust the sharpness of the light spot edge to a relatively sharp level, and complete the initial focus; if the light spot edge cannot be made relatively sharp at the same time, adjust Adjust the pitch angle of the six-axis optical adjustment frame 105 until the sharpness of the edges of the light spot is the same; continue to adjust the rotation axis of the six-axis optical adjustment frame 105 to adjust the rotation angle of the light spot; manually move the one-layer displacement platform 101 to slightly adjust the size of the light spot; the above steps may need to be repeated several times before a satisfactory adjustment is achieved; finally, observe the sharpness of the light spot edge at the optical fiber light output target, rotate the fine-threaded thumb screw 210, adjust the sharpness of the light spot edge to very sharp, and complete the final focus; at this time, tighten the screw on the locking pressure plate 206, and the movement of the one-layer displacement platform 101 will be locked; the optical path adjustment is now complete.

Claims

1. A lighting adjustment device based on multimode optical fiber, comprising a translation stage base, a first-layer translation platform, a second-layer translation platform, a lens mounting base, a lens mounting tube, and a six-axis optical adjustment frame, wherein: The first-layer displacement platform is installed on the displacement platform base, and can slide relative to the displacement platform base in the left and right directions; the second-layer displacement platform is installed on the first-layer displacement platform, and can slide relative to the first-layer displacement platform in the left and right directions; the lens mounting base is fixedly installed on the second-layer displacement platform, and maintains the same motion state as the second-layer displacement platform; the lens mounting base serves as an adapter, and the lens mounting barrel is assembled on its left side; the six-axis optical adjustment frame OAF is fixedly installed on the displacement platform base, and is located on the left side of the lens mounting barrel; an achromatic lens is installed inside the lens mounting barrel, and the six-axis optical adjustment frame is installed with a multi-mode optical fiber, and the light output direction of the optical fiber is toward the achromatic lens.

2. The lighting adjustment device according to claim 1, wherein: The base of the translation platform is installed on a plane through bolts and pins.

3. The lighting adjustment device according to claim 1, wherein: Two parallel precision guide rails are horizontally installed on the base of the translation stage. The precision guide rail is a cross roller guide rail, one end of which is fixed to the base of the translation stage by bolts, and the other end is connected to a layer of translation platform by bolts, so that the layer of translation platform can move left and right in the horizontal direction relative to the base of the translation stage.

4. The lighting adjustment device according to claim 1, wherein: The one-layer displacement platform is installed with a position card on the side, and the displacement platform base is installed with a locking pressure piece on the same side; the locking pressure piece is located on the outside of the position card. When the locking pressure piece is tightened using a screw, the position card cannot move, thereby achieving movement locking of the one-layer displacement platform.

5. The lighting adjustment device according to claim 1, wherein: Two parallel precision guide rails are horizontally installed on the first-layer displacement platform. The precision guide rail is a cross-roller guide rail, one end of which is fixed to the first-layer displacement platform by bolts, and the other end is connected to the second-layer displacement platform by bolts, so that the second-layer displacement platform can move left and right in the horizontal direction relative to the first-layer displacement platform.

6. The lighting adjustment device according to claim 1, wherein: A compression spring base is provided on the right side of the second-layer displacement platform, and a through hole is correspondingly provided on the right side wall of the first-layer displacement platform, and the compression spring base is installed at the through hole; a compression spring is installed on the left side of the compression spring base, and the compression spring is located between the compression spring base and the second-layer displacement platform. The elastic force of the compression spring enables the second-layer displacement platform to always maintain a tendency to move to the left.

7. The lighting adjustment device according to claim 6, characterized in that: A fine-threaded nut is installed on the side of the second-layer displacement platform, and the fine-threaded nut is tightened by the pressure of the tightening screw; a fine-threaded hand screw is installed on the fine-threaded nut; a steel column is installed on the same side of the first-layer displacement platform, and the steel column bears the pressure from the fine-threaded hand screw; by rotating the fine-threaded hand screw clockwise, the second-layer displacement platform will move right relative to the first-layer displacement platform, and by rotating the fine-threaded hand screw counterclockwise, the second-layer displacement platform will move left relative to the first-layer displacement platform under the action of the compression spring.

8. The lighting adjustment device according to claim 1, wherein: The lens mounting base is connected to the second-layer displacement platform via bolts; the lens mounting tube is connected to the lens mounting base via threads.

9. The lighting adjustment device according to claim 1, wherein: The six-axis optical adjustment frame is fixedly installed above the translation stage base by means of bolts.

10. The method for using the multimode optical fiber-based lighting adjustment device according to any one of claims 1 to 9, comprising: First, fix the base of the translation stage on a plane, and then insert the multimode fiber into the fiber holder of the six-axis optical adjustment mount. After completing the installation of the optical fiber, adjust the XY axis of the six-axis optical adjustment frame so that the optical fiber light output is coaxial with the achromatic lens; observe the sharpness of the edge of the light spot at the optical fiber light output target, move the second-layer displacement platform, adjust the sharpness of the light spot edge to be relatively sharp, and complete the initial focus; if the edge of the light spot cannot be relatively sharp at the same time, adjust the pitch angle of the six-axis optical adjustment frame until the sharpness of the edges of the light spot is the same; continue to adjust the rotation axis of the six-axis optical adjustment frame to adjust the rotation angle of the light spot; manually move one layer of displacement platform to slightly adjust the size of the light spot; repeat the above steps until you are satisfied; finally, observe the sharpness of the edge of the light spot at the optical fiber light output target, move the second layer of displacement platform, adjust the sharpness of the light spot edge to be very sharp, and complete the final focus; at this time, fix the one layer of displacement platform and the optical path adjustment is completed.

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