Installation and adjustment device for coupling spatial light to detector

Abstract

The utility model discloses an assembling and adjusting device for coupling spatial light to a detector. The assembling and adjusting device comprises a fixed-focus collimator, a lens sleeve and a two-dimensional adjusting frame, the two-dimensional adjusting frame comprises a first inner ring and a first outer ring which can move relatively, and the first inner ring is located in the first outer ring and connected with the first outer ring through an adjusting piece. A lens body capable of being axially adjusted is arranged in the lens sleeve; the fixed-focus collimator is connected with one end of the lens sleeve, and the other end of the lens sleeve is connected with a first inner ring of the two-dimensional adjusting frame; and the fixed focus collimator, the lens body and the first inner ring are coaxial. The beneficial effects of the utility model are that light beams can be aligned with the photosensitive surface of the detector through simple adjustment, the coupling of spatial light to the detector is realized, and the coupling efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of optical assembly and adjustment technology, and specifically relates to an assembly and adjustment device for spatial light coupling to a detector. Background Technology

[0002] Existing technologies utilize collimators and lenses to couple spatial light to a detector. Chinese patent application number 201320114168.6 discloses a dual-fiber collimator coupling and debugging device, including a worktable base. The top surface of the worktable base is equipped with a fiber adjustment assembly, a fiber fixing assembly, and a fiber slot adjustment assembly. The fiber adjustment assembly is located at one end of the worktable base and consists of an adjustment end mounting base, a four-dimensional adjustment frame, an adapter, and an adjustment end collimator clamp. The fiber fixing assembly is located at the other end of the worktable base and consists of a fixing end mounting base and a fixing end clamp cover plate. The fiber slot adjustment assembly is located on the worktable base between the fiber adjustment assembly and the fiber fixing assembly and consists of a support plate, a pad, an adjustment screw, a fixed long block, and a fixed short block. This optical adjustment platform consists of multiple structural components, each of which is difficult to manufacture and complex to operate. While it achieves high-efficiency coupling between optical fibers, it cannot achieve coupling of spatial light to the detector.

[0003] Disadvantages of existing technology:

[0004] 1. When coupling spatial light to the detector, the biggest source of loss is that the spatial light is not aligned when focused to the center of the detector's photosensitive surface. If the coupling device cannot focus and align, the detector will not receive light, the detector will not count, and information cannot be obtained. The existing technology makes alignment difficult and requires repeated adjustments.

[0005] 2. Spatial light is generally a Gaussian beam. To prevent the Gaussian beam from diverging, the lens needs to be placed at the waist of the Gaussian beam. The position of the lens is difficult to determine and is inconvenient to adjust.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The technical problem to be solved by this utility model is: how to solve the problem that the current alignment process is difficult and requires repeated adjustments in order to focus spatial light and align it with the center of the photosensitive surface of the detector.

[0008] This utility model solves the above-mentioned technical problems through the following technical means:

[0009] An assembly and adjustment device for spatial light coupling to a detector includes a fixed-focus collimator, a lens sleeve, and a two-dimensional adjustment frame;

[0010] The two-dimensional adjustment frame includes a first inner ring and a first outer ring that are capable of relative movement, wherein the first inner ring is located inside the first outer ring and is connected by an adjustment member;

[0011] The lens sleeve includes a lens body that can be adjusted axially;

[0012] The fixed-focus collimator is connected to one end of the lens sleeve, and the other end of the lens sleeve is connected to the first inner ring of the two-dimensional adjustment frame;

[0013] The fixed-focus collimator and the lens sleeve are coaxial with the first inner ring.

[0014] Preferably, it also includes a collimator adapter, one end of which is connected to the fixed-focus collimator, and the other end of which is connected to the lens sleeve;

[0015] The fixed-focus collimator, the collimator adapter, and the lens sleeve are coaxial with the first inner ring.

[0016] This invention involves coaxially mounting four parts—a fixed-focus collimator, a collimator adapter, a lens sleeve, and a first inner ring—and connecting them together to a first outer ring. The relative movement of the first inner ring and the first outer ring is adjusted by an adjusting component. By adjusting the two-dimensional adjustment frame, the optical axis of the coupling component is moved, thereby aligning the light beam with the photosensitive surface of the detector, achieving coupling of spatial light to the detector, and improving coupling efficiency.

[0017] Preferably, one end of the fixed-focus collimator is threadedly connected to one end of the collimator adapter, the other end of the collimator adapter is threadedly connected to the lens sleeve, and the other end of the lens sleeve is threadedly connected to the first inner ring.

[0018] The threads between the fixed-focus collimator and the collimator adapter, the threads between the collimator adapter and the lens sleeve, and the threads between the lens sleeve and the first inner ring all have the same pitch.

[0019] By using the same thread for installation and connection, coaxiality can be guaranteed to the greatest extent. This ensures that the parallel light from the fixed-focus collimator passes through the center of the lens body and reaches the photosensitive surface of the detector, improving coupling efficiency. At the same time, it ensures the coaxiality of the coupled components, eliminating the need to calibrate the coaxiality of each component.

[0020] Preferably, the collimator adapter is a stepped sleeve structure, with the small end of the collimator adapter connected to the fixed-focus collimator and the large end of the collimator adapter connected to the lens sleeve.

[0021] Preferably, it also includes a fastening screw, which is radially connected along the collimator adapter and abuts against or connects to the fixed-focus collimator.

[0022] Preferably, the lens sleeve further includes a lens mounting sleeve and a light-shielding sleeve, the light-shielding sleeve being rotatably connected to the outside of the lens mounting sleeve, and the lens body being connected inside the lens mounting sleeve.

[0023] Preferably, the lens sleeve further includes two axially spaced retaining rings, which are threadedly connected to the lens mounting sleeve, and the lens body is confined between the two retaining rings.

[0024] The position of the lens body can be adjusted by rotating the retaining ring, thereby adjusting the diameter of the light spot and improving coupling efficiency.

[0025] The lens mounting tube has annular protrusions on both ends of its outer wall, and the light shielding tube has radially extending connecting plates with annular grooves on the connecting plates. Alternatively, the lens mounting tube has annular grooves on both ends of its outer wall, and the light shielding tube has annular protrusions on the connecting plates. The lens mounting tube and the light shielding tube are rotatably connected through the annular protrusions and annular grooves.

[0026] Preferably, the side wall of the lens mounting tube includes a through first slot, and the side wall of the light shield tube includes a through second slot. The first slot and the second slot may completely overlap, partially overlap, or not overlap at all during the rotation of the light shield tube.

[0027] The light-shielding tube can rotate, so that the first slot and the second slot can completely overlap, partially overlap, or not overlap at all during the rotation of the light-shielding tube. When they completely overlap or partially overlap, the position of the retaining ring can be adjusted. When they do not overlap at all, light-shielding treatment is achieved to prevent external light interference.

[0028] Preferably, the adjusting component is an adjusting bolt, which is radially connected to the first outer ring and extends into the interior of the first outer ring before connecting or abutting against the first inner ring.

[0029] Preferably, the end of the first outer ring furthest from the lens sleeve is the detector mounting end.

[0030] The advantages of this utility model are:

[0031] 1. In this utility model, a fixed-focus collimator, a collimator adapter, and a lens sleeve are coaxially installed with the first inner ring and then connected to the first outer ring. The first inner ring and the first outer ring achieve relative motion adjustment through an adjustment component. The adjustment process is simple. By adjusting the two-dimensional adjustment frame, the optical axis of the coupling part device is moved, thereby aligning the light beam with the photosensitive surface of the detector, realizing the coupling of spatial light to the detector, and improving the coupling efficiency.

[0032] 2. By installing and connecting the coupling components with the same thread, the coaxiality can be guaranteed to the greatest extent. This can ensure that the parallel light from the fixed-focus collimator passes through the center of the lens body and reaches the photosensitive surface of the detector, thereby improving the coupling efficiency. At the same time, it ensures the coaxiality of the coupling components, eliminating the need to calibrate the coaxiality of each component.

[0033] 3. The position of the lens body can be adjusted by rotating the retaining ring, thereby adjusting the diameter of the light spot and improving the coupling efficiency;

[0034] 4. The light-shielding tube can rotate, so that the first slot and the second slot can completely overlap, partially overlap, or not overlap at all during the rotation of the light-shielding tube. When they completely overlap or partially overlap, the position of the retaining ring can be adjusted. When they do not overlap at all, light-shielding treatment is achieved to prevent external light interference. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an assembly and adjustment device for spatial optical coupling to a detector according to an embodiment of the present invention;

[0036] Figure 2 This is an exploded schematic diagram of an assembly and adjustment device for spatial optical coupling to a detector according to an embodiment of this utility model;

[0037] Figure 3 This is another exploded schematic diagram of an assembly and adjustment device for spatial optical coupling to a detector according to an embodiment of this utility model;

[0038] Figure 4 This is a perspective view of the lens sleeve according to an embodiment of the present invention;

[0039] Figure 5 This is a perspective view of the two-dimensional adjustment frame according to an embodiment of this utility model;

[0040] Numbering on the map:

[0041] 1. Fixed-focus collimator;

[0042] 2. Collimator adapter; 21. Fastening screws;

[0043] 3. Lens sleeve; 31. Lens body; 32. Lens mounting tube; 33. Light shield tube; 34. Snap ring;

[0044] 4. Two-dimensional adjustment frame; 41. Adjustment component; 42. First inner ring; 43. First outer ring;

[0045] 5. Detector. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] Example 1:

[0048] like Figure 1 , Figure 2 , Figure 3 As shown, a spatial light coupling device to a detector includes a fixed-focus collimator 1, a collimator adapter 2, a lens sleeve 3, and a two-dimensional adjustment frame 4.

[0049] Specifically, such as Figure 2 As shown, the right end of the fixed-focus collimator 1 has an external thread, and the left end of the collimator adapter 2 has an internal thread. The fixed-focus collimator 1 is connected by being screwed into the internal thread of the left end of the collimator adapter 2. Then, two fastening screws 21 are used to fix and lock the fixed-focus collimator 1 onto the collimator adapter 2. The fastening screws 21 are rubber-headed hexagonal socket head cap screws. The two fastening screws 21 can be arranged axially or circumferentially. At the same time, this embodiment is not limited to the number and position of the fastening screws 21, as long as they can lock the two together. In this embodiment, the fastening screws 21 pass through the collimator adapter 2 in the radial direction. The fastening screws 21 can be threadedly connected to the collimator adapter 2 and, after passing through the collimator adapter 2, abut against or connect with the fixed-focus collimator 1.

[0050] An external light source outputs a beam of parallel light after passing through the fixed-focus collimator 1. The beam diameter is between 0.5 and 1.5 mm, preferably 1 mm. The fixed-focus collimator 1 can be replaced according to the different wavelengths of the light source.

[0051] Collimator adapter 2 is mainly used for connecting the fixed-focus collimator 1 and the lens sleeve 3. Collimator adapter 2 has a stepped sleeve structure, with its left end being the smaller end, which connects to the fixed-focus collimator 1, and its right end being the larger end, which connects to the lens sleeve 3. Therefore, the dimensions of both ends of collimator adapter 2 should be adapted to the fixed-focus collimator 1 and the lens sleeve 3, respectively. Here, "adapted" means that collimator adapter 2 can achieve a threaded connection with the fixed-focus collimator 1 and the lens sleeve 3. Of course, collimator adapter 2 is not limited to a stepped shape; it can also be frustum-shaped, as long as both ends of collimator adapter 2 are compatible with the fixed-focus collimator 1 and the lens sleeve 3.

[0052] Also refer to Figure 4As shown, the lens sleeve 3 includes a lens body 31, a lens mounting sleeve 32, a light-shielding sleeve 33, and retaining rings 34. The light-shielding sleeve 33 is rotatably connected to the outside of the lens mounting sleeve 32, the lens body 31 is connected inside the lens mounting sleeve 32, and the two retaining rings 34 are connected inside the lens mounting sleeve 32 and can limit the axial position of the lens body 31.

[0053] Specifically, both the lens mounting tube 32 and the light-shielding tube 33 are cylindrical structures. The left end of the lens mounting tube 32 has an internal thread, and the right end of the collimator adapter 2 has an external thread. The collimator adapter 2 and the lens mounting tube 32 are connected by threads. The right end of the lens mounting tube 32 has an external thread and is connected to the two-dimensional adjustment frame 4 by threads.

[0054] The inner wall of the lens mounting cylinder 32 is threaded, and the outer ring of the retaining ring 34 is threaded. The retaining ring 34 can be installed inside the lens mounting cylinder 32 through the threads, and its axial position can be moved by rotating it. The center of the retaining ring 34 is hollow, so as not to block the light path. The lens body 31 is located between the two retaining rings 34. It can be moved towards the lens body 31 by rotating the two retaining rings 34 on both sides, and clamp the lens body 31. When it is necessary to move the lens body 31, it is only necessary to move the two retaining rings 34 on both sides to adjust the position of the lens body 31, so that the spatial light is focused by the lens body 31 and illuminates the photosensitive surface of the detector 5.

[0055] The lens body 31 is an aspherical lens (1 inch). Different light sources require the corresponding aspherical lens to be replaced. Simply rotate and remove the retaining ring 34 to replace the lens body 31.

[0056] Since the lens body 31 is fixed by the retaining rings 34 on the left and right sides inside the lens sleeve 3, and the retaining rings 34 are fixed inside the lens sleeve 3 by threads, the position of the lens body can be adjusted by rotating the retaining rings 34, thereby adjusting the diameter of the light spot and improving the coupling efficiency.

[0057] It should be noted that the lens body 31 and the lens mounting tube 32 are arranged coaxially, and the accuracy of the coaxiality is ensured by the machining accuracy and installation accuracy of both.

[0058] like Figure 3 , Figure 5 As shown, the two-dimensional adjustment frame 4 includes a first inner ring 42 and a first outer ring 43 that are capable of relative movement. The first inner ring 42 is located inside the first outer ring 43 and is connected by an adjusting member 41.

[0059] In this embodiment, the adjusting member 41 is an adjusting bolt. The adjusting bolt is radially connected to the first outer ring 43 and extends into the first outer ring 43 before connecting or abutting against the first inner ring 42. By turning the adjusting member 41, the movement of the first inner ring 42 within the first outer ring 43 can be controlled. However, during the movement, the central axis of the first inner ring 42 and the first outer ring 43 is kept parallel, i.e. Figure 2 As shown, the first inner ring 42 moves only within the vertical section of the first outer ring 43. In this embodiment, there are at least two adjusting members 41.

[0060] Among them, reference Figure 2 , Figure 3 As shown, the left end of the first inner ring 42 is threadedly connected to the lens mounting sleeve 32, and the end of the first outer ring 43 furthest from the lens sleeve 3 is the detector mounting end, which is threadedly connected to the detector 5. Therefore, the fixed-focus collimator 1, the collimator adapter 2, and the lens body 31 are arranged coaxially with the first inner ring 42. After the fixed-focus collimator 1, the collimator adapter 2, and the lens sleeve 3 are fixed together by threads, they are finally fixed on the first inner ring 42 of the two-dimensional adjustment frame 4.

[0061] In the case of processing and assembly errors of various structural components, there may be a situation where the coupled beam deviates from the photosensitive surface. By adding a two-dimensional adjustment frame 4, the adjustment component 41 of the two-dimensional adjustment frame 4 can be adjusted to adjust the relative position of the first inner ring 42 and the first outer ring 43, which drives the connected structural components to move, thereby driving the optical axis of the coupled part device to move, and then aligning the beam with the photosensitive surface of the detector 5, realizing the coupling of spatial light to the detector 5.

[0062] The threads between the fixed-focus collimator 1 and the collimator adapter 2, the threads between the collimator adapter 2 and the lens sleeve 3, the threads between the lens sleeve 3 and the first inner ring 42, and the threads between the first outer ring 43 and the detector 5 all use threads with the same pitch. In this embodiment, an SM1 thread can be used to ensure coaxiality to the greatest extent. The SM1 thread is a fine-pitch thread with a pitch of 1.035 mm and a diameter ranging from approximately 1.035 mm to 40 mm. This thread design allows it to fit tightly with other optical components of the same specifications, thereby enabling the assembly and adjustment of the optical system.

[0063] This embodiment, through the same threaded installation and connection, can largely ensure that the parallel light from the fixed-focus collimator 1 passes through the center of the lens body 31 and reaches the photosensitive surface of the detector 5, thereby improving the coupling efficiency and ensuring the coaxiality of the coupled components, thus eliminating the need for calibrating the coaxiality of each component.

[0064] The installation process in this embodiment:

[0065] First, the first outer ring 43 of the two-dimensional adjustment frame 4 is fixed to the detector 5 by threads. One end of the lens mounting tube 32 of the lens sleeve 3 is fixed to the first inner ring 42 of the two-dimensional adjustment frame 4 by threads. Then, the collimator adapter 2 is fixed to the other end of the lens mounting tube 32 of the lens sleeve 3 by threads. Finally, the fixed-focus collimator 1 is screwed into the collimator adapter 2 by threads. Then, the fixed-focus collimator 1 is locked onto the collimator adapter 2 with two fastening screws 21.

[0066] After installation, the two-dimensional adjustment frame 4 is adjusted to drive the connected integral structural components. The integral structural components are the structure after the focusing collimator 1, collimator adapter 2 and lens sleeve 3 are fixed together by threads. Finally, the integral structural components are fixed on the first inner ring 42 of the two-dimensional adjustment frame 4. The first inner ring 42 and the first outer ring 43 of the two-dimensional adjustment frame 4 can move relative to each other. The relative position of the first inner ring 42 and the first outer ring 43 can be adjusted by the adjustment piece 41 on the two-dimensional adjustment frame 4, which drives the connected structural components to move, thereby driving the optical axis of the coupling part to move, and then aligning the beam with the detector 5. Then, by rotating the two retaining rings 34 on both sides of the lens body 31, the position of the lens body 31 is adjusted, thereby adjusting the diameter of the light spot, so that the spatial light is focused by the lens body 31 and illuminates the photosensitive surface of the detector 5, thereby improving the coupling efficiency.

[0067] In this embodiment, the debugging result is determined by measuring the ratio of the detector output voltage to the input light intensity; that is, when the maximum conversion gain is greater than 9.0 × 10⁻⁶. 6 When V / W, the adjustment is complete. Then, rotate the light-shielding tube 33 of the lens sleeve 3 to achieve light-shielding.

[0068] The spatial light coupling to the detector assembly and adjustment device in this embodiment can achieve spatial light coupling to the detector 5 alignment. All components are installed and connected by threads to ensure the coaxiality of the coupling components, eliminating the need for calibration of the coaxiality of each component, making the operation convenient and quick. By adjusting the two-dimensional adjustment frame 4, the optical axis of the coupling part is moved, thereby aligning the beam with the detector to achieve spatial light coupling to the detector. While ensuring the beam and detector are aligned, the position of the lens body 31 inside the lens sleeve 3 is adjusted by rotating the retaining ring 34 to adjust the diameter of the light spot and improve the coupling efficiency.

[0069] Example 2:

[0070] In this embodiment, as Figure 4 As shown, the side wall of the lens mounting tube 32 includes a through first slot, and the side wall of the light shield tube 33 includes a through second slot. The first slot and the second slot can completely overlap, partially overlap, or not overlap at all during the rotation of the light shield tube 33.

[0071] The first slot and the second slot can be one or a combination of rectangular slots, waist-shaped slots, square slots, etc. This embodiment is not limited to the specific shape of the first slot and the second slot, and the shapes of the first slot and the second slot can also be different. As long as they overlap, manual rotation of the retaining ring 34 can be achieved.

[0072] In this embodiment, the debugging result is determined by measuring the ratio of the output voltage of detector 5 to the input light intensity, i.e., when the maximum conversion gain is greater than 9.0 × 10⁻⁶. 6 At V / W, the adjustment is complete. Then, the light-shielding tube 33 of the lens sleeve 3 is rotated until the first slot and the second slot are completely disjointed, and light-shielding treatment is performed. This embodiment also provides a connection method between the lens mounting tube 32 and the light-shielding tube 33.

[0073] Specifically, the lens mounting cylinder 32 has annular protrusions on its outer walls at both ends, and the light-shielding cylinder 33 has radially extending connecting plates at both ends. The connecting plates have annular grooves. The annular protrusions on the lens mounting cylinder 32 and the annular grooves on the light-shielding cylinder 33 engage with each other while maintaining a gap, achieving a sliding connection and allowing the lens mounting cylinder 32 to rotate circumferentially with the light-shielding cylinder 33. Alternatively, the lens mounting cylinder 32 has annular grooves on its outer walls at both ends, and correspondingly, the connecting plates at both ends of the light-shielding cylinder 33 have annular protrusions on their outer walls. The annular protrusions of the light-shielding cylinder 33 slide with the annular grooves of the lens mounting cylinder 32, achieving rotation.

[0074] It should also be noted that due to the rotatable design of the lens mounting cylinder 32 and the light-shielding cylinder 33, there may be difficulties in tightening the lens sleeve 3 when it is connected to the collimator adapter 2 and the two-dimensional adjustment frame 4 at the left and right ends, respectively. Therefore, an annular screwing part (not shown in the figure) can be provided on the outer wall of one or both ends of the lens mounting cylinder 32. The outer wall of the annular screwing part is provided with friction patterns. By gripping the annular screwing part, the lens sleeve 3 can be rotated for easy installation.

[0075] In this embodiment, the sliding connection between the lens mounting tube 32 and the light-shielding tube 33 allows for easy rotation of the light-shielding tube 33, thereby adjusting the first slot and the second slot to be completely, partially, or not at all overlapping. When they are completely or partially overlapping, the position of the lens body 31 can be adjusted by rotating the retaining ring 34. Once the adjustment is complete, the light-shielding tube 33 is rotated so that the first slot and the second slot are not at all overlapping, achieving a light-shielding effect and reducing light interference.

[0076] It should be noted that this embodiment only provides one connection method between the lens mounting tube 32 and the light shield tube 33. The connection method between the lens mounting tube 32 and the light shield tube 33 can also be a threaded connection, which can also realize the rotation between the light shield tube 33 and the lens mounting tube 32.

[0077] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An assembly and adjustment device for spatial optical coupling to a detector, characterized in that, Includes a fixed-focus collimator, lens sleeve, and two-dimensional adjustment frame; The two-dimensional adjustment frame includes a first inner ring and a first outer ring that are capable of relative movement, wherein the first inner ring is located inside the first outer ring and is connected by an adjustment member; The lens sleeve includes a lens body that can be adjusted axially; The fixed-focus collimator is connected to one end of the lens sleeve, and the other end of the lens sleeve is connected to the first inner ring of the two-dimensional adjustment frame; The fixed-focus collimator and the lens sleeve are coaxial with the first inner ring.

2. The assembly and adjustment device for spatial optical coupling to a detector according to claim 1, characterized in that, It also includes a collimator adapter, one end of which is connected to the fixed-focus collimator, and the other end of which is connected to the lens sleeve; The fixed-focus collimator, the collimator adapter, and the lens sleeve are coaxial with the first inner ring.

3. The assembly and adjustment device for spatial optical coupling to a detector according to claim 2, characterized in that, One end of the fixed-focus collimator is threadedly connected to one end of the collimator adapter, the other end of the collimator adapter is threadedly connected to the lens sleeve, and the other end of the lens sleeve is threadedly connected to the first inner ring. The threads between the fixed-focus collimator and the collimator adapter, the threads between the collimator adapter and the lens sleeve, and the threads between the lens sleeve and the first inner ring all have the same pitch.

4. The assembly and adjustment device for spatial optical coupling to a detector according to claim 2, characterized in that, The collimator adapter is a stepped sleeve structure. The small end of the collimator adapter is connected to the fixed-focus collimator, and the large end of the collimator adapter is connected to the lens sleeve.

5. The assembly and adjustment device for spatial optical coupling to a detector according to claim 2, characterized in that, It also includes fastening screws that are radially connected along the collimator adapter and abut against or connected to the fixed-focus collimator.

6. The assembly and adjustment device for spatial optical coupling to a detector according to claim 1, characterized in that, The lens sleeve also includes a lens mounting tube and a light-shielding tube. The two ends of the light-shielding tube are rotatably connected to the outside of the lens mounting tube, and the lens body is connected inside the lens mounting tube.

7. The assembly and adjustment device for spatial optical coupling to a detector according to claim 6, characterized in that, The lens sleeve also includes two axially spaced retaining rings, which are threadedly connected to the lens mounting sleeve, and the lens body is confined between the two retaining rings.

8. The assembly and adjustment device for spatial optical coupling to a detector according to claim 6, characterized in that, The side wall of the lens mounting tube includes a through first slot, and the side wall of the light shield tube includes a through second slot. The first slot and the second slot may completely overlap, partially overlap, or not overlap at all during the rotation of the light shield tube.

9. The assembly and adjustment device for spatial optical coupling to a detector according to claim 1, characterized in that, The adjusting component is an adjusting bolt, which is radially connected to the first outer ring and extends into the interior of the first outer ring before connecting or abutting against the first inner ring.

10. The assembly and adjustment device for spatial optical coupling to a detector according to claim 1, characterized in that, The end of the first outer ring furthest from the lens sleeve is the detector mounting end.

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