An adjustment device, an optical fiber positioning unit and a control method

Abstract

The application discloses an adjusting device, an optical fiber positioning unit and a control method, and is used for adjusting the relative position of the optical fiber positioning unit. The adjusting device comprises an adjusting mechanism and a supporting part. The adjusting mechanism is arranged on the supporting part. The adjusting mechanism comprises an adjusting assembly and a brake assembly arranged along a first direction. The adjusting assembly comprises a driving piece, a rotating shaft, a fixed sleeve and a toothed sleeve. An optical fiber end surface is arranged on the rotating shaft. The driving piece is connected with and drives the rotating shaft to rotate. The outer peripheral wall of the rotating shaft is sequentially sleeved with the fixed sleeve and the toothed sleeve. The toothed sleeve is closer to the end of the rotating shaft than the fixed sleeve. The fixed sleeve is arranged between the fixed sleeve and the rotating shaft, so that the fixed sleeve rotates synchronously with the rotating shaft. The fixed sleeve and the toothed sleeve are screw-connected to form a screw pair. The brake assembly is used for restricting the movement state of the toothed sleeve relative to the rotating shaft, so that the toothed sleeve has a first state and a second state. The technical scheme can realize the defocus error compensation of the optical fiber end surface.

Description

Technical Field

[0001] This application relates to the field of astronomical optics technology, and in particular to an adjustment device, an optical fiber positioning unit, and a control method. Background Technology

[0002] Large focal plane spectroscopic survey telescopes (LFS) achieve two-dimensional planar positioning of the fiber end face through fiber positioning units, enabling the integrated deployment of a massive number of focal plane units. Since the telescope's focal plane is mostly curved, relying solely on planar positioning can easily cause defocusing deviations at the fiber end face, resulting in decreased optical energy coupling efficiency and consequently reduced spectral observation accuracy. Therefore, how to adjust and compensate for the defocusing of the fiber end face is a pressing technical challenge that needs to be addressed in this field. Summary of the Invention

[0003] This application proposes an adjustment device that can achieve defocusing error compensation at the fiber end face.

[0004] To achieve the above objectives, this application discloses the following technical solutions:

[0005] An adjustment device is provided for adjusting the relative position of an optical fiber positioning unit. The adjustment device includes an adjustment mechanism and a support component; the adjustment mechanism is disposed on the support component.

[0006] The adjustment mechanism includes: an adjustment component and a braking component arranged along a first direction;

[0007] The adjustment assembly includes: a driving component, a rotating shaft, a fixed sleeve, and a toothed sleeve; an optical fiber end face is provided on the rotating shaft, and the driving component is connected to and drives the rotating shaft to rotate; the fixed sleeve and the toothed sleeve are sequentially sleeved on the outer peripheral wall of the rotating shaft, wherein the toothed sleeve is closer to the end of the rotating shaft than the fixed sleeve;

[0008] The fixed sleeve and the rotating shaft are fixedly fitted together so that the fixed sleeve rotates synchronously with the rotating shaft, and the fixed sleeve and the toothed sleeve are threadedly connected to form a threaded pair;

[0009] The braking assembly is used to constrain the motion state of the toothed sleeve relative to the rotation axis, so that the toothed sleeve has a first state and a second state;

[0010] When the braking assembly applies a braking constraint to the toothed sleeve, the toothed sleeve is in the first state, and the rotating shaft drives the fixed sleeve to rotate synchronously in the second direction, and the rotating shaft moves along the first direction through the threaded pair; when the braking assembly releases the braking constraint on the toothed sleeve, the toothed sleeve is in the second state, and the fixed sleeve and the toothed sleeve can rotate synchronously in the third direction with the rotating shaft; wherein, the second direction is opposite to the third direction.

[0011] In some technical solutions, the supporting component includes: a supporting sleeve, a first supporting rod, and a second supporting rod;

[0012] The support sleeve is provided with the first support rod and the second support rod;

[0013] The adjustment assembly also includes: a bearing;

[0014] The first end of the rotating shaft passes through the support sleeve, the inner ring of the bearing is fixedly sleeved on the outer circumferential surface of the toothed sleeve, the outer ring of the bearing is connected to the first support rod, and the second support rod is connected to the braking assembly.

[0015] In some technical solutions, the number of adjustment mechanisms is multiple sets, and the outer ring of the bearing of each set of adjustment mechanisms is arranged circumferentially around the first support rod.

[0016] In some technical solutions, the rotating shaft is constructed as a cylindrical structure, and the inner cylinder of the rotating shaft is used for the optical fiber of the optical fiber positioning unit to be inserted and arranged.

[0017] In some technical solutions, the fixing sleeve is provided with fixing holes;

[0018] The adjustment assembly further includes a positioning element; the positioning element passes through the fixing hole and abuts against the outer peripheral surface of the rotating shaft to fix the fixing sleeve and the rotating shaft.

[0019] In some technical solutions, the braking assembly includes: a brake mounting base, a brake tooth seat, and a brake drive component;

[0020] Both the brake tooth seat and the brake drive component are mounted on the brake mounting base, and the brake mounting base is connected to the second support rod;

[0021] The brake drive component can drive the brake tooth seat to move along the first direction;

[0022] A brake lever is provided on the brake tooth seat;

[0023] When the braking assembly applies a braking constraint to the toothed sleeve, the brake rod is inserted into the tooth gap of the toothed sleeve to restrict the rotation of the toothed sleeve; when the braking assembly releases the braking constraint on the toothed sleeve, the brake rod exits the tooth gap of the toothed sleeve to release the braking of the toothed sleeve.

[0024] In some technical solutions, the braking assembly further includes: an elastic element;

[0025] The brake tooth seat is provided with a mounting hole, the elastic element is installed in the mounting hole and connected to the brake rod, so that the brake rod has a tendency to move into the tooth gap.

[0026] In some technical solutions, the braking drive component includes: a connecting sleeve, an armature, and a de-energized electromagnet;

[0027] The brake mounting base has a mounting end face with a sliding hole. The connecting sleeve slides through the sliding hole. One end of the connecting sleeve is connected to the brake tooth seat, and the other end of the connecting sleeve is equipped with an armature.

[0028] The de-energized electromagnet is mounted on the brake mounting base and is positioned opposite to the armature.

[0029] In some technical solutions, the braking drive component further includes: a spring;

[0030] The spring is sleeved on the outer circumferential surface of the connecting sleeve so that the brake tooth seat has a tendency to move into the tooth gap.

[0031] A fiber optic positioning unit device includes: a central rotation mechanism, an eccentric rotation mechanism, and a fiber optic positioning unit, and further includes: an adjustment device as described in any one of claims 1 to 9;

[0032] The eccentric rotation mechanism, the central rotation mechanism, and the adjustment device are connected sequentially along the first direction, and the optical fiber end face is mounted on the eccentric rotation mechanism.

[0033] A control method for an adjustment device, employing the aforementioned adjustment device, includes the following steps:

[0034] S1: Get the total movement along the first direction;

[0035] S2: Determine the single movement amount and the number of movements based on the pitch of the threaded pair between the fixed sleeve and the toothed sleeve, the preset rotation angle of the rotating shaft, and the total movement amount;

[0036] S3: Control the braking assembly to apply braking constraint to the toothed sleeve;

[0037] S4: Control the drive unit to drive the rotating shaft to rotate by a preset rotation angle in the second direction, so that the rotating shaft moves in the positive direction in the first direction;

[0038] S5: Control the braking assembly to release the braking constraint on the toothed sleeve;

[0039] S6: Control the drive unit to drive the rotating shaft to rotate by a preset rotation angle along a third direction, so that the rotating shaft moves back to the position where it has not rotated along the second direction in the opposite direction of the first direction;

[0040] S7: Repeat steps S3 to S6 until the cumulative movement of the rotating axis equals the total movement.

[0041] As can be seen from the above technical solution, this application, through the method of "braking constraint - threaded feed - releasing the brake - synchronous rotation", enables the rotating shaft to generate cumulative displacement along the first direction during the periodic reciprocating rotation of the driving component, thereby achieving the total displacement. This application can achieve high-precision, small-step axial adjustment and a compact structure by utilizing rotary drive and threaded pair, making it convenient for use in scenarios with dense arrangement of fiber optic positioning units. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings, all of which fall within the scope of protection of this solution. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structure or operation.

[0043] Figure 1 A schematic diagram of the adjustment device provided in an embodiment of this application from a first perspective;

[0044] Figure 2 A schematic diagram of the adjustment device provided in an embodiment of this application from a first perspective;

[0045] Figure 3 This is a schematic diagram of the adjustment mechanism provided in the embodiments of this application;

[0046] Figure 4 A cross-sectional view of some components of the adjustment device provided in an embodiment of this application;

[0047] Figure 5 This is a schematic diagram illustrating the fit between the fixed sleeve, toothed sleeve, and rotating shaft provided in the embodiments of this application.

[0048] Figure 6 This is a schematic diagram of the braking assembly provided in the embodiments of this application;

[0049] Figure 7 This is a schematic diagram of the brake lever and other components provided in the embodiments of this application;

[0050] Figure 8 This is a schematic diagram of the structure of the braking drive component provided in the embodiments of this application;

[0051] Figure 9 A flowchart of the control method;

[0052] Figure 10 This is a schematic diagram of the structure of the adjustment device (including the drive circuit board) provided in the embodiments of this application.

[0053] in:

[0054] 10 is the adjustment mechanism, 11 is the adjustment component, 111 is the driving component, 112 is the rotating shaft, 113 is the fixing sleeve, 1131 is the fixing through hole, 114 is the toothed sleeve, and 115 is the bearing; 12 is the braking component, 121 is the brake mounting seat, 1211 is the mounting end face, 122 is the brake tooth seat, 123 is the brake driving component, 1231 is the connecting sleeve, 1232 is the armature, 1233 is the de-energized electromagnet, 1234 is the spring, 124 is the brake lever, and 125 is the elastic element;

[0055] 20 is a support component, 21 is a support sleeve, 22 is the first support rod, and 22 is the second support rod;

[0056] 30 is the central rotary mechanism;

[0057] 40 is an eccentric rotary mechanism;

[0058] 50 is the driver circuit board. Detailed Implementation

[0059] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0060] Since the focal plane of a telescope is mostly a curved structure, it is easy for the fiber end face to have a Z-direction defocus deviation relative to the actual focal plane. This results in the fiber end face not being accurately aligned with the target focal plane, which in turn leads to a decrease in optical energy coupling efficiency and affects the accuracy of spectral observation.

[0061] To solve the above technical problems, such as Figure 1As shown, this application provides an adjustment device for adjusting the relative position of fiber optic positioning units. This relative position refers to the position of the fiber end face of the fiber optic positioning unit along the Z-direction or a similar axial direction to compensate for defocusing of the fiber end face. The adjustment device may include an adjustment mechanism 10 and a support component 20; the adjustment mechanism 10 is mounted on the support component 20. The support component 20 provides a mounting base for the adjustment mechanism 10, enabling the adjustment mechanism 10 to perform axial adjustment within a relatively small space, thereby meeting the requirement for compact deployment of numerous fiber optic positioning units in large focal-area spectroscopic survey telescopes.

[0062] like Figure 2 As shown, the adjustment mechanism 10 may include an adjustment component 11 and a braking component 12 arranged along a first direction; wherein, the first direction can be understood as the direction in which the fiber end face of the fiber positioning unit needs to be defocused, for example, it may be the Z-axis adjustment direction of the fiber end face, such as... Figure 2 The Z-direction can also be a direction that is consistent with or approximately consistent with the axis of the fiber end face of the fiber positioning unit. Of course, in different application scenarios, the first direction can also be adaptively defined according to the installation posture of the fiber end face of the fiber positioning unit, and this application does not limit it in this regard.

[0063] like Figure 3 As shown, the adjustment assembly 11 may include: a drive component 111, a rotating shaft 112, a fixed sleeve 113, and a toothed sleeve 114. An optical fiber end face is provided on the rotating shaft 112, and the drive component 111 connects to and drives the rotating shaft 112 to rotate. The fixed sleeve 113 and the toothed sleeve 114 are sequentially fitted onto the outer peripheral wall of the rotating shaft 112, wherein the toothed sleeve 114 is closer to the end of the rotating shaft 112 than the fixed sleeve 113. It should be noted that the drive component 111 can directly or indirectly drive the rotating shaft 112 to rotate. The drive component 111 can be a motor, such as a stepper motor, servo motor, or micro DC motor; it can also be other actuators capable of outputting rotational motion. By controlling the rotation angle, speed, and direction of the drive component 111, controllable rotation of the rotating shaft 112 can be achieved, thereby providing a power source for subsequent axial position adjustment.

[0064] The fixed sleeve 113 and the rotating shaft 112 are fixedly fitted together so that the fixed sleeve 113 rotates synchronously with the rotating shaft 112. The fixed sleeve 113 and the toothed sleeve 114 are threadedly connected to form a threaded pair. Specifically, the end of the fixed sleeve 113 extending toward the toothed sleeve 114 is threadedly connected to the toothed sleeve 114 to form a threaded pair. That is to say, the fixed sleeve 113 and the toothed sleeve 114 are engaged by a threaded structure. When the toothed sleeve 114 is restricted from rotating, the fixed sleeve 113 rotates relative to the toothed sleeve 114 under the drive of the rotating shaft 112, and converts the rotational motion into linear motion along the first direction based on the threaded pair, thereby driving the rotating shaft 112 and the optical fiber end face of the optical fiber positioning unit set on the rotating shaft 112 to move along the first direction.

[0065] The braking assembly 12 is used to constrain the motion state of the toothed sleeve 114 relative to the rotation axis 112, so that the toothed sleeve 114 has a first state and a second state.

[0066] When the braking assembly 12 applies a braking constraint to the toothed sleeve 114, the toothed sleeve 114 is in a first state, and the rotating shaft 112 drives the fixed sleeve 113 to rotate synchronously in a second direction, and the rotating shaft 112 moves along the first direction through the threaded pair; when the braking assembly 12 releases the braking constraint on the toothed sleeve 114, the toothed sleeve 114 is in a second state, and the fixed sleeve 113 and the toothed sleeve 114 can rotate synchronously with the rotating shaft 112 in a third direction; wherein, the second direction and the third direction are opposite. When the braking assembly 12 releases the braking constraint on the toothed sleeve 114, the toothed sleeve 114 can rotate synchronously with the fixed sleeve 113 and the rotating shaft 112, and no relative helical feed motion occurs between the fixed sleeve 113 and the toothed sleeve 114, so that the rotating shaft 112 can maintain its position along the first direction basically unchanged during rotation.

[0067] In summary, this application, through a process of "braking constraint—threaded feed—brake release—synchronous rotation," enables the rotating shaft 112 to generate cumulative displacement along the first direction during the periodic reciprocating rotation of the drive component 111, thereby achieving total displacement (i.e., defocus compensation). This application utilizes rotary drive and threaded joints to achieve high-precision, small-step axial adjustment and a compact structure, facilitating its use in scenarios with densely arranged fiber optic positioning units.

[0068] Based on the inventive concept of the above solution, such as Figure 2 As shown, the support component 20 may include: a support sleeve 21, a first support rod 22, and a second support rod 23.

[0069] The support sleeve 21 is provided with a first support rod 22 and a second support rod 23.

[0070] like Figure 3 As shown, the adjustment assembly 11 may also include a bearing 115.

[0071] The first end of the rotating shaft 112 passes through the support sleeve 21, the inner ring of the bearing 115 is fixedly sleeved on the outer circumferential surface of the toothed sleeve 114, the outer ring of the bearing 115 is connected to the first support rod 22, and the second support rod 23 is connected to the braking assembly 12.

[0072] In the above technical solution, the bearing 115 supports the toothed sleeve 114, allowing it to rotate smoothly relative to the support component 20 when not constrained by the braking assembly 12, thus reducing the frictional resistance when the toothed sleeve 114 rotates synchronously with the rotating shaft 112. Simultaneously, the bearing 115 also improves the coaxiality and stability between the toothed sleeve 114 and the support component 20, reducing radial wobble during adjustment and thereby improving the accuracy of the Z-axis adjustment of the fiber optic end face.

[0073] Based on the above technical solutions, such as Figure 2 and Figure 3 As shown, there are multiple sets of adjustment mechanisms 10, with the bearing 115 of each set of adjustment mechanisms 10 arranged circumferentially around the first support rod 22. In this technical solution, by arranging multiple sets of adjustment mechanisms 10 around the support member 20, the fiber optic components of multiple fiber optic positioning units can be compactly installed around the support member 20, thereby adapting to the application requirements of large focal plane spectroscopic survey telescopes with a large number of fiber optic positioning units, small spacing, and array arrangement.

[0074] It should be noted that multiple adjustment mechanisms 10 can adopt the same structural form, or they can adopt different structural forms with different parameters according to the focal curvature, the area where the fiber positioning unit is located, the adjustment stroke requirements, or the control accuracy requirements. For example, the threaded pairs in different adjustment mechanisms 10 can be set with different pitches, the driving component 111 can be a motor with different pitch angles, and the braking component 12 can also be set with different braking forces or response speeds to meet the differentiated requirements of fiber end face defocus compensation at different positions.

[0075] In one technical solution, the rotating shaft 112 is constructed as a cylindrical structure, with the inner cylinder of the rotating shaft 112 providing a space for the optical fiber of the optical fiber positioning unit to pass through. This design allows the rotating shaft 112 to simultaneously perform transmission and optical fiber containment functions. The optical fiber can pass through the inner cylinder of the rotating shaft 112 and extend to the end of the optical fiber positioning unit, which helps to reduce the overall structural size and improve the integration of the device. Furthermore, the cylindrical rotating shaft 112 also provides some protection for the optical fiber, preventing interference or wear from external components during adjustment. In this technical solution, when the rotating shaft 112 is driven to rotate in the second direction to a target preset angle, the optical fiber in the inner cavity deflects synchronously with the rotating shaft 112. After one adjustment operation is completed, driving the rotating shaft 112 to rotate back by a preset angle can drive the optical fiber to rotate and reset, thus preventing damage to the optical fiber.

[0076] In some technical solutions, such as Figure 4 and Figure 5 As shown, the fixing sleeve 113 is provided with a fixing through hole 1131.

[0077] The adjustment assembly 11 also includes a positioning element; the positioning element passes through the fixing hole 1131 and abuts against the outer peripheral surface of the rotating shaft 112 to fix the fixing sleeve 113 and the rotating shaft 112. In this technical solution, by fixing the fixing element through the hole, it can be ensured that the fixing sleeve 113 and the rotating shaft 112 rotate synchronously, avoiding slippage of the fixing sleeve 113 relative to the rotating shaft 112, thereby improving the reliability of the thread feed.

[0078] It should be noted that the positioning element can be a pin, screw, positioning pin, elastic pin, or other connecting element capable of circumferential and axial positioning. The fixing through hole 1131 and the limiting hole can be a round hole, an oblong hole, or other hole structure adapted to the positioning element. In some embodiments, the fixed connection between the fixing sleeve 113 and the rotating shaft 112 can also be achieved by key connection, spline connection, interference fit, bonding, welding, or integral molding, etc., and this application does not limit this.

[0079] like Figure 4 and Figure 6 As shown, the braking assembly 12 may include a brake mounting base 121, a brake tooth seat 122, and a brake drive member 123.

[0080] Both the brake tooth seat 122 and the brake drive component 123 are mounted on the brake mounting seat 121, and the brake mounting seat 121 is connected to the second support rod 23.

[0081] The brake drive unit 123 can drive the brake tooth seat 122 to move in the first direction.

[0082] A brake lever 124 is provided on the brake tooth seat 122.

[0083] When the braking assembly 12 applies a braking constraint to the toothed sleeve 114, the brake rod 124 inserts into the tooth gap of the toothed sleeve 114 to restrict the rotation of the toothed sleeve 114; when the braking assembly 12 releases the braking constraint on the toothed sleeve 114, the brake rod 124 exits the tooth gap of the toothed sleeve 114 to release the braking of the toothed sleeve 114. Thus, through the insertion and engagement between the brake rod 124 and the tooth gap of the toothed sleeve 114, the switching control of the rotation state of the toothed sleeve 114 can be achieved, resulting in a simple structure and reliable braking.

[0084] In the above technical solution, the outer periphery of the toothed sleeve 114 can be provided with multiple teeth, and a tooth gap is formed between adjacent teeth. The brake rod 124 can be inserted into the tooth gap along the first direction or along a direction that makes an angle with the first direction, as long as it can restrict the rotation of the toothed sleeve 114. The teeth of the toothed sleeve 114 can be straight teeth, helical teeth, ratchet teeth, or other toothed structures that facilitate the insertion of the brake rod 124 and restrict its rotation.

[0085] To improve the reliability of the backlash fit between the brake lever 124 and the toothed sleeve 114, such as Figure 7 As shown, the braking assembly 12 may also include an elastic element 125.

[0086] The brake tooth seat 122 is provided with a mounting hole, and the elastic element 125 is installed in the mounting hole and connected to the brake rod 124 so that the brake rod 124 tends to move into the tooth gap. By applying an elastic preload to the brake rod 124 through the elastic element 125, the brake rod 124 can more easily enter the tooth gap when it approaches the tooth sleeve 114, and can still achieve reliable engagement or locking even when there is a slight positional deviation in the tooth sleeve 114.

[0087] It should be noted that the elastic element 125 can be a compression spring, a sheet spring, a rubber elastic element, a wave spring, or other structures capable of providing elastic restoring force. The elastic element 125 can directly abut against the brake lever 124 or indirectly act on the brake lever 124 through an intermediate component. In some embodiments, the end of the brake lever 124 can be provided with a guide slope or rounded corner structure to facilitate the smooth entry of the brake lever 124 into the toothed sleeve 114, reducing the risk of jamming. In addition, the brake lever 124 can be a pin.

[0088] It should also be noted that the mounting hole can be a through hole. One end of the elastic element 125 is connected to the brake rod 124, and the other end is connected to the adjusting rod, which can adjust the elastic force of the elastic element 125.

[0089] like Figure 8 As shown, the braking drive component 123 may include: a connecting sleeve 1231, an armature 1232, and a de-energized electromagnet 1233.

[0090] The brake mounting base 121 has a mounting end face 1211 with a sliding hole. The connecting sleeve 1231 slides through the sliding hole. One end of the connecting sleeve 1231 is connected to the brake tooth seat 122, and the other end of the connecting sleeve 1231 is equipped with an armature 1232.

[0091] The de-energized electromagnet 1233 is mounted on the brake mounting base 121 and is positioned opposite to the armature 1232.

[0092] In this technical solution, the de-energized electromagnet 1233 can switch between energized and de-energized states to control the position change of the armature 1232, thereby driving the brake tooth seat 122 to move via the connecting sleeve 1231. In specific use, when the de-energized electromagnet 1233 is forward-energized, the magnetic field generated by the coil of the de-energized electromagnet 1233 cancels the magnetic field of the internal permanent magnet, reducing or eliminating the attraction force of the de-energized electromagnet 1233 on the armature. The armature 1232 is released under the action of the spring 1234, causing the armature 1232 to drive the connecting sleeve 1231 to slide axially along the sliding hole, thereby pulling the brake tooth seat 122 to move synchronously, thus completing the locking brake; wherein, the direction of movement of the armature 1232 can be as follows... Figure 6 As indicated by the arrow representing line segment N; when the de-energized electromagnet 1233 is reverse-energized, the magnetic field generated by the coil of the de-energized electromagnet 1233 is superimposed with the magnetic field of the internal permanent magnet, enhancing the attraction force on the armature 1232. After the armature 1232 is attracted, it moves away from the toothed sleeve 114 to release the locking limit of the brake tooth seat. The direction of movement of the armature 1232 can be as follows: Figure 6 The arrow in line segment M is shown.

[0093] Furthermore, the advantage of using a power-off electromagnet 1233 is that it can maintain the braking component 12 in a preset safe braking state under power failure or abnormal conditions, thereby preventing the fiber end face of the fiber positioning unit from drifting due to accidental power failure and improving the reliability and safety of the device. Of course, in other embodiments, the braking drive 123 can also be an energized electromagnet, a piezoelectric actuator, a micro motor, a pneumatic drive, a hydraulic drive, a shape memory alloy drive, etc., as long as it can drive the brake lever 124 to switch between the braking position and the release position. In addition, the power-off electromagnet 1233 can also reduce heat generation. The power-off electromagnet 1233 only needs to be briefly energized to complete the switching of the braking state and then de-energized, and its position is maintained by the cooperation of its internal permanent magnet and spring.

[0094] like Figure 8 As shown, in order to further improve the reset capability of the braking assembly 12, the braking drive component 123 may also include a spring 1234.

[0095] Spring 1234 is sleeved on the outer circumferential surface of connecting sleeve 1231, so that brake tooth seat 122 tends to move into the tooth gap. In a specific technical solution, by using spring 1234, the brake tooth seat 122 can always have a braking force against toothed sleeve 114. Spring 1234 is used in conjunction with de-energized electromagnet 1233. When the electromagnetic attraction force generated by de-energized electromagnet 1233 to attract armature 1232 is greater than the elastic force generated by spring 1234, armature 1232 drives connecting sleeve 1231 to slide axially along sliding hole, thereby pulling brake tooth seat 122 to move synchronously, releasing the locking limit of brake tooth seat 122.

[0096] In a specific technical solution, the outer circumferential surface of the connecting sleeve 1231 has threads and a nut is screwed on it, which serves to change the spring force. The spring 1234 is sandwiched between the nut and the brake mounting seat 121. The closer the nut is screwed on to the brake mounting seat 121, the more the spring is compressed and the greater the spring force. In this way, the compression amount can be manually adjusted.

[0097] Based on the above structure, the adjustment device of this application can realize the following working process:

[0098] When the fiber end face of the fiber positioning unit needs to be moved in the positive direction of the first direction, the braking assembly 12 is first controlled to apply braking constraint to the toothed sleeve 114, so that the brake rod 124 is inserted into the tooth gap of the toothed sleeve 114, restricting the rotation of the toothed sleeve 114; then the driving component 111 is controlled to drive the rotating shaft 112 to rotate by a preset angle in the second direction. Since the fixed sleeve 113 is fixedly connected to the rotating shaft 112, the fixed sleeve 113 rotates synchronously with the rotating shaft 112, while the toothed sleeve 114 is restricted from rotating by the braking assembly 12. Therefore, the threaded pair between the fixed sleeve 113 and the toothed sleeve 114 generates axial feed, causing the rotating shaft 112 to move in the positive direction of the first direction.

[0099] After the rotating shaft 112 completes a single forward movement, the control braking assembly 12 releases the braking constraint on the toothed sleeve 114, causing the brake lever 124 to exit the backlash of the toothed sleeve 114. Subsequently, the control drive 111 drives the rotating shaft 112 to rotate by a preset angle along a third direction. The second direction is opposite to the third direction. Since the toothed sleeve 114 is not braked at this time, the toothed sleeve 114, the fixed sleeve 113, and the rotating shaft 112 can rotate synchronously. The threaded pair does not produce effective reverse axial feed or only produces negligible relative motion, allowing the rotating shaft 112 to return to a position where it has not rotated along the second direction, but retaining the axial movement generated in the aforementioned steps.

[0100] By cyclically executing the aforementioned braking, forward rotation feed, braking release, and reverse rotation actions, the rotating shaft 112 can generate cumulative displacement along the first direction until the cumulative axial movement of the rotating shaft 112 equals the preset total movement. Thus, this application can convert the reciprocating rotational motion of the drive unit 111 into a unidirectional cumulative micro-displacement of the rotating shaft 112 along the first direction, achieving precise compensation for the Z-direction defocusing of the optical fiber end face.

[0101] This application also provides an optical fiber positioning unit device, such as... Figure 2 As shown, the device may include a central rotating mechanism 30, an eccentric rotating mechanism 40, and an optical fiber positioning unit, as well as the adjustment device described in any of the above embodiments. The eccentric rotating mechanism 40, the central rotating mechanism 30, and the adjustment device are sequentially connected along a first direction, and the optical fiber positioning unit is mounted on the eccentric rotating mechanism 40. The optical fiber positioning unit is mounted on the eccentric rotating mechanism 40, and when the rotating shaft 112 moves along the first direction, the optical fiber positioning unit moves synchronously with the rotating shaft 112, thereby achieving Z-axis position adjustment of the optical fiber end face relative to the telescope focal plane. Through the central rotating mechanism 30 and the eccentric rotating mechanism 40, the two-dimensional positioning capability of the optical fiber positioning unit can be maintained. The central rotating mechanism 30 and the eccentric rotating mechanism 40 are driven by a central rotating motor and an eccentric rotating motor, respectively, and rotate around the central rotating axis and the eccentric rotating axis, respectively. Furthermore, the driving component 111 may be a central rotating motor.

[0102] This technical solution also provides a control method for the adjustment device, such as... Figure 10 As shown, the steps include:

[0103] S1: Obtain the total movement along the first direction; this can be understood as obtaining the Z-axis defocus compensation amount. In this technical solution, based on the shape of the telescope focal plane, the position of the target fiber end face, the current Z-axis position of the fiber end face, and the position of the target focal plane, the total movement amount to be compensated is calculated, which is the total defocus compensation amount.

[0104] S2: Based on the pitch of the threaded pair between the fixed sleeve 113 and the toothed sleeve 114, the preset rotation angle of the rotating shaft 112, and the total movement, determine the single movement amount and the number of movements, and determine the single movement amount Δz and the number of movements n. Specifically, based on the pitch p of the threaded pair between the fixed sleeve 113 and the toothed sleeve 114 and the preset rotation angle θ required by the rotating shaft 112, calculate the single movement amount Δz: Δz = p × θ / 360°, where p is the thread pitch and θ is the single rotation angle of the rotating shaft 112 when the toothed sleeve 114 is braked. Of course, based on the total movement amount Z and the single movement amount Δz, determine the required number of movements n. If Z is not divisible by Δz, compensation can be made by adjusting the last rotation angle θ' or by using a smaller angle step.

[0105] S3: Control the braking assembly 12 to apply braking constraint to the toothed sleeve 114. In this technical solution, such as Figure 4 and Figure 9 As shown, the drive circuit board 50 controls the de-energized electromagnet 1233 to be energized in the forward direction, causing the magnetic field generated by the coil of the de-energized electromagnet 1233 to cancel the magnetic field of the internal permanent magnet, thus reducing or eliminating the attraction of the de-energized electromagnet 1233 to the armature. The armature 1232 is released under the action of the spring 1234 and drives the brake tooth seat 122 to move closer to the toothed sleeve 114 through the connecting sleeve 1231, so that the brake rod 124 is inserted into the tooth gap of the toothed sleeve 114, thereby braking the toothed sleeve 114. After the release action is completed, the de-energized electromagnet 1233 can be de-energized, and the spring 1234 maintains the released position of the armature 1232.

[0106] S4: The control drive 111 drives the rotating shaft 112 to rotate by a preset rotation angle along the second direction, causing the rotating shaft 112 to move in the positive direction of the first direction. In this technical solution, the drive 111 drives the rotating shaft 112 to rotate by a preset rotation angle θ along the first direction. The rotating shaft 112 drives the fixed sleeve 113 to rotate synchronously, and the fixed sleeve 113 and the braked toothed sleeve 114 rotate relative to each other, causing the rotating shaft 112 to generate a single movement Δz through the threaded pair.

[0107] S5: Control the braking assembly 12 to release the braking constraint on the toothed sleeve 114. In this technical solution, the drive circuit board 50 controls the de-energized electromagnet 1233 to be energized in reverse, so that the magnetic field generated by the coil of the de-energized electromagnet 1233 is superimposed with the magnetic field of the internal permanent magnet, enhancing the attraction force on the armature 1232. After the armature 1232 is attracted, it drives the brake tooth seat 122 to move away from the toothed sleeve 114 through the connecting sleeve 1231, so that the brake rod 124 exits the tooth gap of the toothed sleeve 114, and the toothed sleeve 114 is released from braking. After the attraction action is completed, the de-energized electromagnet 1233 can be de-energized, and the attraction force of the internal permanent magnet maintains the attracted position of the armature 1232.

[0108] S6: The control drive unit 111 drives the rotating shaft 112 to rotate by a preset rotation angle along a third direction, causing the rotating shaft 112 to move in the opposite direction of the first direction back to the position where it has not rotated along the second direction. In this technical solution, the drive circuit board 50 controls the drive unit 111 to rotate by a preset rotation angle θ along a third direction, causing the rotating shaft 112 to return to the angular position before the start of the focusing cycle. Since the toothed sleeve 114 has been released from braking and can rotate synchronously with the rotating shaft 112, this reverse return process does not generate any movement.

[0109] S7: Repeat steps S3 to S6 until the cumulative movement of the rotating axis 112 equals the total movement.

[0110] In a preferred embodiment, the preset rotation angle θ of the rotating shaft 112 is 45°. When the pitch of the threaded pair between the fixed sleeve 113 and the toothed sleeve 114 is p, the adjustment amount generated by each 45° rotation of the rotating shaft 112 is p / 8. By repeating the cyclical action of "power-off electromagnet 1233 is energized in the forward direction to release armature 1232 and brake - power-off to maintain braking - central shaft rotates 45° in the forward direction - power-off electromagnet 1233 is energized in the reverse direction to attract armature 1232 and release braking - power-off to maintain release braking - central shaft rotates back 45° in the reverse direction", the required total defocus compensation amount can be gradually accumulated.

[0111] After the total defocus compensation adjustment is completed, the drive circuit board 50 controls the de-energized electromagnet 1233 to be energized in reverse, causing the armature 1232 to engage and drive the brake tooth seat 122 to move, causing the brake rod 124 to disengage from the toothed sleeve 114. Subsequently, the de-energized electromagnet 1233 is de-energized, and the armature 1232 can be kept engaged by the attraction force of the permanent magnet inside the de-energized electromagnet 1233, keeping the toothed sleeve 114 in a non-braking state. Then, the drive circuit board 50 controls the central rotary motor and the eccentric rotary motor to rotate according to the normal fiber positioning procedure, rotating them for the corresponding number of pulses, so that the fiber end face reaches the target two-dimensional position. Since the toothed sleeve 114 rotates synchronously with the rotating shaft 112 at this time, there is no relative helical motion between the fixed sleeve 113 and the toothed sleeve 114, so no additional defocus change occurs during the two-dimensional positioning process. Through the above control method, the present invention can first complete the defocus compensation of the fiber end face along the Z-axis direction, and then complete the position positioning of the fiber end face in the two-dimensional focal plane; or, depending on the specific observation strategy, the Z-axis defocus compensation and the two-dimensional positioning process can be executed in time.

[0112] In the above context, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0113] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0114] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0115] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An adjustment device for adjusting the relative position of an optical fiber positioning unit, characterized in that, The adjustment device includes: an adjustment mechanism (10) and a support component (20); the adjustment mechanism (10) is disposed on the support component (20); The adjustment mechanism (10) includes: an adjustment component (11) and a braking component (12) arranged along a first direction. The adjustment assembly (11) includes: a drive component (111), a rotating shaft (112), a fixed sleeve (113), and a toothed sleeve (114); the rotating shaft (112) is provided with an optical fiber end face, and the drive component (111) is connected to and drives the rotating shaft (112) to rotate; the fixed sleeve (113) and the toothed sleeve (114) are sequentially sleeved on the outer peripheral wall of the rotating shaft (112), wherein the toothed sleeve (114) is closer to the end of the rotating shaft (112) than the fixed sleeve (113); The fixed sleeve (113) and the rotating shaft (112) are fixedly sleeved together so that the fixed sleeve (113) rotates synchronously with the rotating shaft (112). The fixed sleeve (113) and the toothed sleeve (114) are threadedly connected to form a threaded pair. The braking assembly (12) is used to constrain the motion state of the toothed sleeve (114) relative to the rotation axis (112) so that the toothed sleeve (114) has a first state and a second state; When the braking assembly (12) applies a braking constraint to the toothed sleeve (114), the toothed sleeve (114) is in the first state, and the rotating shaft (112) drives the fixed sleeve (113) to rotate synchronously in the second direction, and the rotating shaft (112) moves along the first direction through the threaded pair; when the braking assembly (12) releases the braking constraint on the toothed sleeve (114), the toothed sleeve (114) is in the second state, and the fixed sleeve (113) and the toothed sleeve (114) can rotate synchronously in the third direction with the rotating shaft (112); wherein, the second direction is opposite to the third direction.

2. The adjustment device as described in claim 1, characterized in that, The support component (20) includes: a support sleeve (21), a first support rod (22), and a second support rod (23); The support sleeve (21) is provided with the first support rod (22) and the second support rod (23). The adjustment assembly (11) further includes: a bearing (115); The first end of the rotating shaft (112) passes through the support sleeve (21), the inner ring of the bearing (115) is fixedly sleeved on the outer circumferential surface of the toothed sleeve (114), the outer ring of the bearing (115) is connected to the first support rod (22), and the second support rod (23) is connected to the braking assembly (12).

3. The adjustment device as described in claim 2, characterized in that, The number of adjustment mechanisms (10) is multiple sets, and the outer ring of the bearing (115) of each set of adjustment mechanisms (10) is arranged circumferentially around the first support rod (22).

4. The adjustment device as described in claim 1, characterized in that, The rotating shaft (112) is constructed as a cylindrical structure, and the inner cylinder of the rotating shaft (112) is used for the optical fiber of the optical fiber positioning unit to be inserted and arranged.

5. The adjustment device as described in claim 1, characterized in that, The fixing sleeve (113) is provided with a fixing through hole (1131); The adjustment assembly (11) further includes: a positioning member; the positioning member passes through the fixing hole (1131) and abuts against the outer peripheral surface of the rotating shaft (112) to fix the fixing sleeve (113) and the rotating shaft (112).

6. The adjustment device as described in claim 2, characterized in that, The braking assembly (12) includes: a brake mounting seat (121), a brake tooth seat (122), and a brake drive member (123). The brake tooth seat (122) and the brake drive member (123) are both mounted on the brake mounting seat (121), and the brake mounting seat (121) is connected to the second support rod (23); The brake drive (123) can drive the brake tooth seat (122) to move along the first direction; A brake lever (124) is provided on the brake tooth seat (122). When the braking assembly (12) applies a braking constraint to the toothed sleeve (114), the brake rod (124) is inserted into the tooth gap of the toothed sleeve (114) to restrict the rotation of the toothed sleeve (114); when the braking assembly (12) releases the braking constraint on the toothed sleeve (114), the brake rod (124) exits the tooth gap of the toothed sleeve (114) to release the braking of the toothed sleeve (114).

7. The adjusting device as described in claim 6, characterized in that, The braking assembly (12) further includes: an elastic element (125); The brake tooth seat (122) is provided with a mounting hole, the elastic element (125) is installed in the mounting hole and connected to the brake rod (124) so ​​that the brake rod (124) has a tendency to move into the tooth gap.

8. The adjusting device as described in claim 6, characterized in that, The braking drive component (123) includes: a connecting sleeve (1231), an armature (1232), and a de-energized electromagnet (1233). The brake mounting base (121) is constructed with a mounting end face (1211), the mounting end face (1211) has a sliding hole, the connecting sleeve (1231) slides through the sliding hole, one end of the connecting sleeve (1231) is connected to the brake tooth seat (122), and the other end of the connecting sleeve (1231) is equipped with an armature (1232). The de-energized electromagnet (1233) is mounted on the brake mounting base (121) and is positioned opposite to the armature (1232).

9. The adjusting device as described in claim 8, characterized in that, The brake drive component (123) further includes: a spring (1234); The spring (1234) is sleeved on the outer peripheral surface of the connecting sleeve (1231) so that the brake tooth seat (122) has a tendency to move into the tooth gap.

10. A fiber optic positioning unit device, comprising: The central rotary mechanism (30), the eccentric rotary mechanism (40), and the fiber optic positioning unit are characterized in that they further include: an adjustment device as described in any one of claims 1 to 9; The eccentric rotation mechanism (40), the central rotation mechanism (30), and the adjustment device are connected in sequence along the first direction, and the optical fiber end face is mounted on the eccentric rotation mechanism (40).

11. A control method for an adjustment device, characterized in that, The adjustment device as described in any one of claims 1 to 9 includes the following steps: S1: Get the total movement along the first direction; S2: Determine the single movement amount and the number of movements based on the pitch of the threaded pair between the fixed sleeve (113) and the toothed sleeve (114), the preset rotation angle of the rotating shaft (112), and the total movement amount; S3: Control the braking assembly (12) to apply braking constraint to the toothed sleeve (114); S4: Control the drive unit (111) to drive the rotating shaft (112) to rotate by a preset rotation angle in the second direction, so that the rotating shaft (112) moves in the positive direction in the first direction; S5: Control the braking assembly (12) to release the braking constraint on the toothed sleeve (114); S6: The control drive (111) drives the rotating shaft (112) to rotate by a preset rotation angle in a third direction, so that the rotating shaft (112) moves back to the position where it has not rotated in the second direction in the opposite direction of the first direction; S7: Repeat steps S3 to S6 until the cumulative movement of the rotating axis (112) equals the total movement.

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