Spatial optical coupling structure

Abstract

The utility model provides a spatial optical coupling structure, which belongs to the technical field of spectral analysis and optical engineering and comprises a bearing mechanism, a lens cone, a base connected with an inner cavity of the lens cone through a jackscrew and a transverse dovetail fixedly connected with the base through a dovetail structure. And the focusing lens group comprises a lens frame which is movably arranged in the inner cavity of the lens barrel. By means of the optimized design of the structure, space incident light can be efficiently coupled into the optical fiber, and the optical fiber coupling device is suitable for optical equipment such as a microscopic Raman spectrometer detection system. The coupling efficiency of spatial light to optical fibers is improved, the transmission quality of optical signals is improved, and the optical fiber coupler is compact in structure, easy to integrate into an optical system and suitable for complex optical path design; through accurate optical element layout, reflection and scattering of light are reduced, and the quality of light beams is improved; the method is suitable for various application scenes, such as the fields of optical communication, spectral analysis and the like, and has relatively high universality and practicability.

Description

Technical Field

[0001] This invention belongs to the technical field of spectral analysis and optical engineering, and specifically relates to a spatial optical coupling structure. Background Technology

[0002] In the field of optics, there are several methods for coupling spatial light into optical fibers: direct coupling is simple but inefficient; lens focusing coupling can improve efficiency and is suitable for optical communication; fiber collimator coupling requires precise adjustment; gradient refractive index lens coupling is efficient but costly; microlens array coupling is suitable for coupling multiple beams of light simultaneously; and holographic element coupling has advantages in special scenarios.

[0003] Existing methods have shortcomings in terms of adjustment mechanisms, etc. Therefore, in order to meet the needs of more complex optical systems and application scenarios for spatial light coupling into optical fibers, it is of great practical significance to develop a spatial light coupling method and device with higher coupling efficiency, better adaptability and unique adjustment mechanism. Utility Model Content

[0004] The purpose of this invention is to provide a spatial optical coupling structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A spatial optical coupling structure, comprising,

[0007] The support mechanism includes a lens barrel, a base connected to the inner cavity of the lens barrel via a set screw, and a transverse dovetail fixedly connected to the base via a dovetail structure;

[0008] The focusing lens assembly includes a lens frame movably mounted inside the lens barrel cavity and a lens fixedly mounted inside the lens frame cavity.

[0009] As a preferred embodiment of this utility model, the supporting mechanism further includes a vertical dovetail fixedly connected to the horizontal dovetail via a dovetail structure, and an optical fiber seat fixedly installed on the outside of the vertical dovetail by screws.

[0010] As a preferred embodiment of this utility model, the frame is movably mounted and can be horizontally adjusted within the inner cavity of the lens barrel.

[0011] As a preferred embodiment of this utility model, both the horizontal dovetail and the vertical dovetail are designed to be adjustable, and both the horizontal dovetail and the vertical dovetail are locked by a set screw.

[0012] As a preferred embodiment of this utility model, the inner cavity of the fiber optic socket is hollow for connecting the fiber optic cable, and the fiber optic cable has a built-in nut that locks it in the inner cavity of the fiber optic socket.

[0013] In a preferred embodiment of this invention, the base and the lens barrel are connected by a set screw and can be adjusted circumferentially along the axial direction.

[0014] As a preferred embodiment of this utility model, the lens has a double-sided convex structure, and the arc-shaped convex surface is used to focus spatial incident light onto the fiber end face.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: through the optimized design of this structure, spatial incident light can be efficiently coupled into the optical fiber, making it suitable for optical equipment such as micro Raman spectrometer detection systems; it improves the coupling efficiency of spatial light to optical fiber, enhances the transmission quality of optical signals, and its compact structure makes it easy to integrate into optical systems, making it suitable for complex optical path designs; through precise optical element layout, it reduces light reflection and scattering, improving beam quality; it is suitable for various application scenarios, such as optical communication and spectral analysis, and has high versatility and practicality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the overall structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the overall structure of this utility model.

[0020] In the diagram: 100, support mechanism; 101, lens barrel; 102, base; 103, horizontal dovetail; 104, vertical dovetail; 105, fiber optic mount; 200, focusing lens group; 201, lens frame; 202, lens. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Example

[0025] Reference Figures 1-3 This is an embodiment of the present invention, which provides a spatial optical coupling structure, including:

[0026] The support mechanism 100 includes a lens barrel 101, a base 102 connected to the inner cavity of the lens barrel 101 via a set screw, and a transverse dovetail 103 fixedly connected to the base 102 via a dovetail structure.

[0027] The focusing lens assembly 200 includes a lens frame 201 movably mounted inside the lens barrel 101 and a lens 202 fixedly mounted inside the lens frame 201.

[0028] In the supporting mechanism 100, the lens barrel 101 provides a stable support frame for the entire spatial optical coupling structure, ensuring the installation foundation of each component. The base 102 is connected to the inner cavity of the lens barrel 101 through a set screw. This connection method facilitates the adjustment of the position of the base 102 within the lens barrel 101 to adapt to different optical path requirements. The lateral dovetail 103 is fixedly connected to the base 102 through a dovetail structure. The dovetail structure has the characteristics of accurate guidance and positioning, making the installation of the lateral dovetail 103 more stable and convenient for installation and disassembly, which is beneficial for subsequent maintenance and adjustment. In the focusing lens group 200, the lens frame 201, which is movably installed in the inner cavity of the lens barrel 101, allows the position of the lens 202 to be flexibly adjusted to better align the incident light in space. The lens 202, which is fixedly installed in the inner cavity of the lens frame 201, ensures the stability of its optical performance and provides a foundation for achieving spatial light focusing.

[0029] Specifically, the support mechanism 100 also includes a vertical dovetail 104 fixedly connected to the horizontal dovetail 103 via a dovetail structure, and an optical fiber seat 105 fixedly installed on the outside of the vertical dovetail 104 by screws.

[0030] The vertical dovetail 104 is fixedly connected to the horizontal dovetail 103 through the dovetail structure, which further expands the spatial layout of the structure and makes the adjustment of the entire structure more flexible in the horizontal and vertical directions. It can adjust the optical path more precisely. The fiber optic base 105, which is fixedly installed on the outside of the vertical dovetail 104 by screws, provides a stable installation position for the optical fiber. The screw connection method ensures the installation firmness of the fiber optic base 105, which is conducive to the stable transmission of optical signals through the optical fiber.

[0031] Furthermore, the frame 201 is movably mounted, and the frame 201 can be horizontally adjusted within the cavity of the lens barrel 101.

[0032] The lens frame 201 is movable and can be horizontally adjusted within the lens barrel 101. This allows the position of the lens 202 in the horizontal direction to be finely adjusted according to the actual optical path conditions. This flexibility helps to focus the spatial incident light onto the target position more accurately, improving the accuracy and efficiency of spatial light coupling and enabling it to better adapt to different optical systems and optical path requirements.

[0033] Preferably, both the horizontal dovetail 103 and the vertical dovetail 104 are adjustable, and both the horizontal dovetail 103 and the vertical dovetail 104 are locked by set screws.

[0034] Both the horizontal dovetail 103 and the vertical dovetail 104 adopt an adjustable design and are locked by a set screw. This design allows for fine adjustment in the horizontal and vertical directions during optical path adjustment. The set screw locking method ensures the structural stability after adjustment and facilitates readjustment when needed. By flexibly adjusting the horizontal and vertical positions, the fiber optic mount 105 and the focusing lens group 200 can be more accurately adjusted to the optimal position, thereby improving the accuracy of spatial optical coupling, reducing light reflection and scattering, and improving the transmission quality of optical signals.

[0035] Furthermore, the inner cavity of the fiber optic connector 105 is hollow for connecting the fiber optic cable, and the fiber optic cable has a built-in nut that locks it into the inner cavity of the fiber optic connector 105.

[0036] The fiber optic connector 105 has a hollow inner cavity for connecting optical fibers. This design provides dedicated installation space for the optical fibers, ensuring the stability and accuracy of the fiber optic connection. The optical fiber is secured with a built-in nut in the inner cavity of the fiber optic connector 105, making the installation of the optical fiber more secure and preventing it from loosening during use. This ensures that the optical signal can be transmitted stably through the optical fiber, reducing signal loss and instability caused by the loosening of the optical fiber.

[0037] Furthermore, the base 102 is connected to the lens barrel 101 by a set screw and can be adjusted circumferentially along the axial direction.

[0038] The base 102 is connected to the lens barrel 101 by a set screw and can be adjusted circumferentially along the axis. This connection and adjustment method provides additional angle adjustment freedom for the focusing lens group 200. By adjusting the base 102 circumferentially along the axis, the angle of the focusing lens group 200 can be changed, so that the lens 202 can be better aligned with the direction of the incident light in space, further improving the adaptability and accuracy of spatial light coupling, and helping to meet the coupling requirements of different optical path directions.

[0039] Furthermore, lens 202 has a double-convex structure, and the arc-shaped convex surface is used to focus spatial incident light onto the fiber end face.

[0040] Among them, lens 202 has a double-sided convex structure and an arc-shaped convex surface to focus spatial incident light onto the fiber end face. This optical structure design can effectively gather light in space and concentrate the light onto the fiber end face, which greatly improves the coupling efficiency of spatial light to optical fiber. Through the precise arc surface design, the scattering and loss of light can be reduced, the intensity and quality of optical signal can be improved, thereby improving the performance of the entire spatial light coupling structure in the optical system.

[0041] In use, micro Raman spectrometers are mainly used for the detection of trace substances such as biomedical and organic compounds. Before formal detection, the excitation source needs to be focused on the substance to be detected, and the collection optical path system needs to collect the Raman signal and transmit it to the acquisition camera. Because the Raman signal is relatively weak, the collection optics need to be adjusted to minimize signal loss during transmission. The fiber optic mount is adjusted by adjusting the horizontal dovetail 103 and the vertical dovetail 104 to keep it as coaxial as possible with the lens tube 101. Then, the focusing lens group 200 is adjusted. When the fiber output light intensity is strongest, it can be stopped and locked, and the collection optical path adjustment is completed.

[0042] In summary, the lens barrel 101 in the support mechanism 100 provides support for the overall structure, the base 102 is connected to the inner cavity of the lens barrel 101 through a set screw and can be adjusted circumferentially along the axis, and both the horizontal dovetail 103 and the vertical dovetail 104 adopt an adjustable design and are locked by a set screw, which makes the structure flexible in spatial layout, helps to achieve precise optical element layout, reduces light reflection and scattering, and improves beam quality;

[0043] The focusing lens group 200 can focus spatial incident light onto the fiber end face, thereby improving the coupling efficiency of spatial light to the fiber and improving the transmission quality of optical signals. In addition, the horizontal dovetail 103 and the vertical dovetail 104 connected by a dovetail structure, and the fiber optic seat 105 fixed to the outside of the vertical dovetail 104 by screws, with the fiber optic seat 105 having a hollow inner cavity for connecting the fiber and being locked by the fiber's own nut, this compact structural design makes the overall structure compact and easy to integrate into an optical system, suitable for complex optical path designs. At the same time, the integrated design of these structures makes this spatial light coupling structure suitable for various application scenarios, such as optical communication, spectral analysis and other fields, with high versatility and practicality.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0046] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A spatial optical coupling structure, characterized in that: include, The support mechanism (100) includes a lens barrel (101), a base (102) connected to the inner cavity of the lens barrel (101) via a set screw, and a transverse dovetail (103) fixedly connected to the base (102) via a dovetail structure. The focusing lens assembly (200) includes a lens frame (201) movably mounted inside the lens barrel (101) and a lens (202) fixedly mounted inside the lens frame (201).

2. The spatial optical coupling structure according to claim 1, characterized in that: The support mechanism (100) also includes a vertical dovetail (104) fixedly connected to the horizontal dovetail (103) via a dovetail structure, and an optical fiber seat (105) fixedly installed on the outside of the vertical dovetail (104) by screws.

3. The spatial optical coupling structure according to claim 2, characterized in that: The frame (201) is movable and can be horizontally adjusted within the cavity of the lens tube (101).

4. The spatial optical coupling structure according to claim 3, characterized in that: Both the horizontal dovetail (103) and the vertical dovetail (104) are adjustable, and both the horizontal dovetail (103) and the vertical dovetail (104) are locked by a set screw.

5. A spatial optical coupling structure according to claim 4, characterized in that: The inner cavity of the fiber optic socket (105) is hollow for connecting optical fibers, and the optical fiber has a built-in nut to lock it in the inner cavity of the fiber optic socket (105).

6. The spatial optical coupling structure according to claim 5, characterized in that: The base (102) is connected to the lens barrel (101) by a set screw and can be adjusted circumferentially along the axial direction.

7. A spatial optical coupling structure according to claim 6, characterized in that: The lens (202) has a double-sided convex structure, and the arc-shaped convex surface is used to focus the spatial incident light onto the fiber end face.

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