Laser beam adjustment mechanism with multiple degrees of freedom

Abstract

The present disclosure describes a laser beam adjustment mechanism with multiple degrees of freedom. The mechanism is an adjustment mechanism that adjusts the path of the laser beam so that the horizontal axis, pitch axis, and optical axis of a laser tracker intersect and are perpendicular to each other. The mechanism includes a base, a first adjustment seat movable relative to the base in a first direction, a second adjustment seat movable relative to the base in a second direction, and a third adjustment seat for adjusting the emission direction of the laser beam. The first direction is different from the second direction. The third adjustment seat includes a connecting member connected to the second adjustment seat, a light-emitting member for emitting the laser beam, and an elastic member disposed between the connecting member and the light-emitting member. The light-emitting member is connected to the connecting member by a plurality of screws, and the screws are used to adjust the emission direction of the laser beam. Through the present disclosure, the horizontal axis, pitch axis, and optical axis of the laser tracker can be adjusted so that they intersect and are perpendicular to each other, thereby improving the measurement accuracy of the laser tracker and accurately measuring the position and posture of the target.

Description

Technical Field

[0001] The present disclosure generally relates to an intelligent manufacturing equipment industry, and more particularly to a laser beam adjustment mechanism with multiple degrees of freedom. Background Art

[0002] With the continuous innovation of industrial technology, the use of laser trackers to measure the position and posture of targets has become an important method in the intelligent manufacturing equipment industry. Generally speaking, lasers have multiple advantages such as high brightness, good monochromaticity, high coherence, and strong directionality. These advantages enable laser trackers to achieve excellent measurement results when used in them.

[0003] As a precision mechanical instrument, the laser tracker has achieved remarkable results in measuring the target position and posture. A general laser tracker includes a horizontal axis, a pitch axis and an optical axis. The horizontal axis and the pitch axis intersect perpendicularly, and the optical axis and the pitch axis intersect perpendicularly. The horizontal position and changes of the target are tracked by rotating the horizontal axis, and the vertical position and changes of the target are tracked by rotating the pitch axis. At the same time, in conjunction with the rotation of the horizontal and pitch axes, the rotating optical axis can track the posture and changes of the target at any angle in space.

[0004] However, in the prior art, the horizontal axis, pitch axis, and optical axis of the laser tracker are not strictly perpendicular to each other, which may cause large errors in the laser tracker (spatial coordinate and attitude measurement) and reduce the measurement accuracy of the laser tracker. Summary of the Invention

[0005] The present disclosure is proposed in view of the above-mentioned state of the prior art, and its purpose is to provide an adjustment mechanism for adjusting the laser beam path so that the horizontal axis, pitch axis and optical axis of the laser tracker intersect and become perpendicular.

[0006] To this end, the present disclosure provides a laser beam adjustment mechanism with multiple degrees of freedom, which is an adjustment mechanism that adjusts the path of the laser beam so that the horizontal axis, pitch axis and optical axis of the laser tracker intersect and are perpendicular. The mechanism includes a base, a first adjustment seat that can move relative to the base in a first direction, a second adjustment seat that can move relative to the base in a second direction, and a third adjustment seat that adjusts the emission direction of the laser beam. The first direction is different from the second direction. The third adjustment seat includes a connecting member connected to the second adjustment seat, a light-emitting member that emits the laser beam, and an elastic member arranged between the connecting member and the light-emitting member. The light-emitting member is connected to the connecting member by multiple screws, and the emission direction of the laser beam is adjusted by the screws.

[0007] In this case, the emission position of the laser beam can be adjusted by the first adjustment seat and the second adjustment seat, and the emission direction of the laser beam can be adjusted by multiple screws on the third adjustment seat. When the laser beam is adjusted using the above-mentioned multiple adjustment seats, the horizontal axis and pitch axis of the laser tracker are made to intersect and be perpendicular. The laser tracker measures the spatial position of the laser beam emission and then determines whether the adjustment mechanism is adjusted into place, so that the positions of the horizontal axis, pitch axis and optical axis are in an intersecting and perpendicular state. When multiple axes intersect and are perpendicular to each other, the measurement accuracy of the laser tracker is improved, thereby improving the measurement accuracy.

[0008] In addition, in the adjustment mechanism of the present disclosure, optionally, the first adjustment seat is slidably mounted on the base, the first adjustment seat includes a first fixing member that fixes the relative position of the first adjustment seat and the base, and the second adjustment seat is slidably mounted on the first adjustment seat, the second adjustment seat includes a second fixing member that fixes the relative position of the second adjustment seat and the first adjustment seat. In this case, after the first adjustment seat and the second adjustment seat are adjusted, the first and second fixing members can be used to fix the first and second adjustment seats, respectively, so that the movement of the adjustment mechanism will not cause the adjustment seats to slide again, thereby preventing a large error.

[0009] In addition, the adjustment mechanism of the present disclosure may optionally further include a plurality of lenses for reflecting the laser beam, and the base, the first adjustment seat, and the second adjustment seat each have a connected through-hole, through which the laser beam passes, is reflected by the lenses, and then passes through the light exit hole. Thus, the laser beam can pass through the through-hole and exit the adjustment mechanism.

[0010] Additionally, in the adjustment mechanism of the present disclosure, optionally, the light emitting member includes a plurality of through holes that match the size of the plurality of screws, and the connecting member includes a plurality of first grooves that match the size of the plurality of screws, the number of the through holes being greater than the number of the first grooves, and the first grooves having threads that match the screws. In this case, the plurality of screws can be engaged with the first grooves through the through holes to secure the light emitting member to the connecting member.

[0011] Furthermore, in the adjustment mechanism of the present disclosure, optionally, the plurality of screws include a plurality of first screws and a plurality of second screws, the number of the through holes is not less than the sum of the number of the first screws and the number of the second screws, and the number of the first grooves is not less than the number of the second screws. Thus, the first and second screws can be easily adjusted to achieve a balanced contact between the light emitting member and the connecting member.

[0012] Additionally, in the adjustment mechanism of the present disclosure, optionally, the first screw and the second screw are alternately positioned on the light-emitting member in a manner that surrounds the laser beam, the first screw extending through the through-hole to reach the surface of the connecting member, and the second screw extending through the through-hole to reach the first groove, with the first screw serving as a jackscrew. In this case, the second screw and the first groove cooperate to pull the light-emitting member, while the first screw supports the light-emitting member. Simultaneously, adjusting the first and second screws can achieve a force balance between the light-emitting member and the connecting member.

[0013] In addition, in the adjustment mechanism of the present disclosure, optionally, the elastic member is an O-shaped rubber ring. In this case, since the O-shaped rubber ring has good elasticity, the contact state between the light emitting frame and the light emitting member can be adjusted by compressing or relaxing the rubber ring.

[0014] Additionally, in the adjustment mechanism of the present disclosure, a second groove matching the elastic member may optionally be formed on a surface of the connecting member proximate the light emitting member, the elastic member being disposed in the second groove, and the depth of the second groove being less than the thickness of the elastic member. In this case, an adjustable width is defined between the light emitting member and the connecting member, the adjustable width being the thickness of the portion of the elastic member extending beyond the depth of the second groove when the elastic member is disposed in the second groove.

[0015] In addition, in the adjustment mechanism of the present disclosure, the light-emitting member is optionally connected to a laser that generates the laser beam, and the laser beam enters the adjustment mechanism through the light-emitting member after being generated by the laser. In this way, the adjustment mechanism can receive the laser light generated by the laser and adjust the path of the laser beam.

[0016] In addition, in the adjustment mechanism of the present disclosure, optionally, the first direction is perpendicular to the second direction. In this case, the first adjustment seat and the second adjustment seat can slide in directions perpendicular to each other to adjust the exit point of the laser beam.

[0017] According to the laser beam adjustment mechanism with multiple degrees of freedom disclosed in the present invention, the horizontal axis, pitch axis and optical axis of the laser tracker can be made to intersect and be perpendicular to each other, thereby improving the measurement accuracy of the laser tracker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present disclosure will now be explained in further detail, by way of example only, with reference to the accompanying drawings, in which:

[0019] Figure 1 2 is a schematic diagram showing the disassembly of a laser tracker according to an embodiment of the present disclosure.

[0020] Figure 2 Schematic diagram showing the beam path of the adjustment mechanism involved in the embodiment of the present disclosure.

[0021] Figure 3 1 is a diagram showing the overall structure of an adjustment mechanism according to an embodiment of the present disclosure.

[0022] Figure 4 1 is a schematic diagram showing a third adjustment seat of the adjustment mechanism according to an embodiment of the present disclosure before installation.

[0023] Figure 5 1 is a schematic diagram showing the third adjustment seat of the adjustment mechanism involved in the embodiment of the present disclosure after installation.

[0024] Figure 6 Schematic diagram showing the adjustment of the light beam by the adjustment mechanism according to the embodiment of the present disclosure.

[0025] Figure 7 1 is a diagram showing the steps of adjusting the adjustment mechanism according to the embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 200...Laser tracker, 210...Function housing,

[0028] 1…regulating mechanism,

[0029] 10…base, 11…first adjustment seat, 12…second adjustment seat,

[0030] 13... third adjustment seat, 130... connecting member, 131... light emitting member, 132... elastic member,

[0031] 130a...first groove, 130b...second groove,

[0032] a…the first screw, b…the second screw,

[0033] A1…horizontal axis, A2…pitch axis, A3…optical axis. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. In the following description, identical components are assigned identical reference numerals, and duplicate descriptions are omitted. In addition, the accompanying drawings are merely schematic, and the proportions of the dimensions of the components and the shapes of the components may differ from the actual ones.

[0035] It should be noted that the terms "including" and "having" and any variations thereof in this disclosure, such as a process, method, system, product or device that includes or has a series of steps or units, are not necessarily limited to those steps or units clearly listed, but may include or have other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0036] In addition, the subheadings and the like in the following description of this disclosure are not intended to limit the content or scope of this disclosure, but are merely provided as a guide for reading. Such subheadings should not be understood as dividing the content of the article, nor should the content under the subheading be limited to the scope of the subheading.

[0037] Embodiments of the present disclosure relate to a laser beam adjustment mechanism with multiple degrees of freedom, an adjustment mechanism that adjusts the path of the laser beam so that the horizontal axis, pitch axis, and optical axis of a laser tracker intersect perpendicularly, and is used to adjust the beam emitted by the laser tracker. The fact that the adjustment mechanism has multiple degrees of freedom can mean that the adjustment mechanism can have multiple motion states relative to a coordinate system. The laser beam adjustment mechanism can be simply referred to as a "dimming mechanism," "adjustment mechanism," or "adjustment device," etc. Hereinafter, it will be referred to as the adjustment mechanism. The adjustment mechanism involved in the present disclosure can improve the accuracy of laser tracker measurements.

[0038] Figure 1 FIG. 2 is a disassembled schematic diagram showing a laser tracker 200 according to an embodiment of the present disclosure. Figure 2 Schematic diagram showing the light beam path of the adjustment mechanism 1 according to the embodiment of the present disclosure.

[0039] In some examples, laser tracker 200 is a precision instrument capable of measuring spatial coordinates and attitude. Preferably, when using laser tracker 200 to measure the position of a target, it is necessary not only to maintain horizontal axis A1 and pitch axis A2 horizontally and perpendicularly, but also to ensure that the direction of the laser beam emitted along optical axis A3 intersects and intersects with pitch axis A2 and horizontal axis A1. In this case, using laser tracker 200 to measure the target can produce highly accurate measurement results.

[0040] like Figure 1As shown, laser tracker 200 has a horizontal axis A1, a pitch axis A2, and an optical axis A3. In some examples, optical axis A3 can represent the extension direction of the laser beam when it is emitted from laser tracker 200. Laser tracker 200 includes a functional housing 210. In some examples, an adjustment structure 1 can be provided in functional housing 210. In some examples, the laser beam can be emitted by a laser, enter adjustment mechanism 1, be adjusted by adjustment mechanism 1, and then be emitted from the laser exit port of functional housing 210. Hereinafter, the laser exit port of functional housing 210 is referred to as the laser exit port.

[0041] In some examples, the laser light may be emitted vertically from the exit port. In some examples, the horizontal axis A1 and the pitch axis A2 intersect perpendicularly. In some examples, the optical axis A3 intersects perpendicularly with the pitch axis A2 and intersects the horizontal axis A1. In this case, the measurement accuracy of the laser tracker 200 can be improved.

[0042] In some cases, when optical axis A3 and horizontal axis A1 are not perpendicular, that is, when the laser light is not emitted from the laser output port perpendicular to horizontal axis A1, using laser tracker 200 to measure distant objects can result in significant measurement errors. In some cases, when the emission direction of optical axis A3 is not perpendicular to horizontal axis A1, for example, when there is an angular deviation of 0.1° or greater, if laser tracker 200 is measuring a distance of 2 km, the measurement result may exhibit an error of 3 meters, significantly reducing the measurement accuracy of laser tracker 200. In this case, adjusting optical axis A3 so that it intersects and intersects perpendicularly with horizontal axis A1 and the pitch axis can improve the measurement accuracy of laser tracker 200.

[0043] Figure 3 1 is a diagram showing the overall structure of the adjustment mechanism 1 according to the embodiment of the present disclosure.

[0044] In some examples, the adjustment mechanism 1 may include a base 10, a first adjustment seat 11, a second adjustment seat 12, and a third adjustment seat 13. In some examples, the first adjustment seat 11 can move relative to the base 10, and the second adjustment seat 12 can move relative to the first adjustment seat 11. Thus, the spatial position of a component on the base 10 can be changed by moving the first adjustment seat 11 or the second adjustment seat 12.

[0045] In some examples, the first adjustment base 11 can be moved along a first direction, and the second adjustment base 12 can be moved along a second direction. In some examples, the first direction and the second direction can be different. Thus, the first adjustment base 11 and the second adjustment base 12 can be moved in different directions to adjust whether the exit position of the laser light path is perpendicular to the pitch axis A2 and intersects the horizontal axis A1.

[0046] In some examples, the third adjustment seat 13 may include a connecting member 130, a light emitting member 131, and an elastic member 132. In some examples, the third adjustment seat 13 may be connected to the second adjustment seat 12 via the connecting member 130. In some examples, the light emitting member 131 may be used to emit a laser beam into the adjustment mechanism 1. In some examples, the elastic member 132 may be disposed between the connecting member 130 and the light emitting member 131. In this case, the specific connection state between the connecting member 130 and the light emitting member 131 can be changed by changing the compression state of the elastic member 132.

[0047] In some examples, the light emitting member 131 and the connecting member 130 can be connected by multiple screws. In some examples, the direction of the laser beam emission can be adjusted by adjusting the screws. Specifically, adjusting the tightness of the screws can change the compression state of the elastic member 132 between the light emitting member 131 and the connecting member 130, thereby changing the angle of the light emitting member 131 relative to the connecting member 130 and adjusting the direction of the laser beam emission.

[0048] In some examples, the connecting member 130 can be fixed to the second adjustment seat 12 by bolts, thereby fixing the third adjustment seat 13 to the second adjustment seat 12. In this case, when the first adjustment seat 11 or the second adjustment seat 12 moves, the third adjustment seat 13 can follow the movement of the first adjustment seat 11 or the second adjustment seat 12 and change its spatial position.

[0049] As described above, in some examples, the first direction and the second direction can be different. In some examples, when the first adjustment seat 11 moves in the first direction and the second adjustment seat 12 moves in the second direction, the third adjustment seat 13 can change to a different spatial position relative to the base 10 in the first direction or the second direction. In this case, when the light emitting member 131 emits laser light, multiple adjustment seats can be adjusted simultaneously to adjust the laser emission angle or laser emission position.

[0050] In some examples, the first direction may be perpendicular to the second direction. In some examples, the first direction may be the X direction, and the second direction may be the Y direction. In this case, the X direction and the Y direction may form a coordinate system, and when the first adjustment seat 11 and the second adjustment seat 12 slide, the sliding trajectory of the adjustment seat can be simulated on the coordinate system. As a result, the adjustment of the adjustment seat can be facilitated, and at the same time, the sliding distance (adjustment distance) of the first adjustment seat 11 and the second adjustment seat 12 can be accurately recorded through the coordinate system.

[0051] In some examples, the first adjustment seat 11 can be mounted on the base 10, and the second adjustment seat 12 can be mounted on the first adjustment seat 11. In some examples, the first adjustment seat 11 can slide on the base 10, and the second adjustment seat 12 can slide on the first adjustment seat 11. In this way, the first adjustment seat 11 and the second adjustment seat 12 can be slid to change the relative position of the laser beam emitted by the light emitting member 131.

[0052] In some examples, the first adjustment seat 11 includes a first fixing member (not shown). In some examples, when the adjustment of the first adjustment seat 11 is completed, the first adjustment seat 11 can be fixed by the first fixing member. Thus, the relative position of the first adjustment seat 11 and the base 10 can be fixed. In some examples, the second adjustment seat 12 includes a second fixing member (not shown). In some examples, when the adjustment of the second adjustment seat 12 is completed, the second adjustment seat 12 can be fixed by the second fixing member. Thus, the relative position of the second adjustment seat 12 and the first adjustment seat 11 can be fixed. In this case, when the adjustment mechanism 1 moves, the undesirable movement of each adjustment seat can be reduced, thereby improving the accuracy of the measurement.

[0053] In some examples, the adjustment mechanism 1 further includes a plurality of lenses. In some examples, the lenses can be used to reflect the laser beam. This allows the position of the laser beam emitted from the adjustment mechanism 1 through the lenses to be observed, thereby determining whether the adjustment mechanism 1 has been successfully adjusted.

[0054] In some examples, the number of lenses is at least 2. In some examples, the lenses can be plane mirrors, beam splitters, or any lenses capable of plane-reflecting light beams.

[0055] In some examples, the base 10, the first adjustment seat 11, and the second adjustment seat 12 each have a through-hole (not shown), which can be connected. In some examples, the connecting member 130 can have a through-hole (not shown). In some examples, when the laser beam enters the adjustment mechanism 1 from the light-emitting member 131, the laser beam can pass through the multiple through-holes and be reflected by the lens before exiting the adjustment mechanism 1.

[0056] Figure 4 1 is a schematic diagram showing the third adjustment seat 13 of the adjustment mechanism 1 according to the embodiment of the present disclosure before installation. Figure 5 1 is a schematic diagram showing the third adjustment seat 13 of the adjustment mechanism 1 according to the embodiment of the present disclosure after installation.

[0057] like Figure 4As shown, an elastic member 132 (described later) may be provided between the light emitting member 131 and the connecting member 130. In some examples, the light emitting member 131 may include multiple through holes. As described above, the light emitting member 131 and the connecting member 130 may be connected by multiple screws. In some examples, the multiple through holes may match the size of the multiple screws. Thus, screws can be passed through the through holes to connect the light emitting member 131 and the connecting member 130.

[0058] In some examples, the connecting member 130 may include a plurality of first grooves 130 a, and the plurality of first grooves 130 a may be sized to match the plurality of screws. In some examples, the number of through holes may be greater than the number of first grooves 130 a. In some examples, the threads of the first grooves 130 a may match the screws. Thus, the first grooves 130 a and the screws may cooperate to secure the light emitting member 131.

[0059] In some examples, the plurality of screws includes a plurality of first screws a and a plurality of second screws b. In some examples, the number of through holes is not less than the total number of first screws a and second screws b. In some examples, the number of first grooves 130 a is not less than the number of first screws a. In this case, when the first screws a and first grooves 130 a engage, each first screw a is secured.

[0060] In some examples, the first screw a and the second screw b can be disposed on the light emitting member 131. In some examples, the first screw a and the second screw b can be arranged alternately and surround the laser beam. In some examples, the first screw a can pass through a through hole to reach the surface of the connecting member 130. In some examples, the second screw b can pass through a through hole to reach the first groove 130a.

[0061] In some examples, the first screw a can be a top screw. In some examples, the top screw can be arranged on the light-emitting member 131 in a manner that surrounds the laser beam. In this case, the light-emitting member 131 can be well fixed in the circumferential direction of the connecting member 130. In addition, the first screw a can cooperate with the through hole to support the light-emitting member 131. Therefore, when the top screw is rotated, the distance between the connecting member 130 and the light-emitting member 131 can change with the rotation of the top screw, thereby adjusting the tightness of the portion between the connecting member 130 and the light-emitting member connected by the top screw.

[0062] As described above, in some examples, an elastic member 132 may be provided between the connecting member 130 and the light emitting member 131. In some examples, when the distance between the connecting member 130 and the light emitting member 131 changes, the connection relationship between the elastic member 132 and the connecting member 130, and the connection relationship between the elastic member 132 and the light emitting member 131 change synchronously.

[0063] In some examples, the second screw b can pass through the through hole to reach the first groove 130a. The second through hole can cooperate with the first groove 130a to fix the light emitting member 131 to the connecting member 130 via the elastic member 132. In some examples, when the second screw b is tightened or loosened, the elastic member 132 can be compressed or expanded, and the light emitting member 131 and the connecting member 130 can be in close contact or light contact. In this case, the depth of the first screw a and the second screw b screwed into the through hole can be adjusted simultaneously to achieve a balance in the contact force between the light emitting member 131 and the elastic member 132. In this way, the light emitting member 131 can be stably set on the elastic member 132.

[0064] In some examples, the elastic member 132 may be an O-shaped rubber ring. Since the O-shaped rubber ring has good elasticity, in this case, the contact state between the connecting frame and the light output member 131 can be adjusted by compressing or relaxing the rubber ring.

[0065] In some examples, a second groove 130b is provided in the connecting member 130. In some examples, the second groove 130b can be provided on a surface close to the light emitting member 131. In some examples, the shape of the second groove 130b can substantially match the shape of the elastic member 132. Thus, the elastic member 132 can be provided in the second groove 130b.

[0066] In some examples, the depth of the second groove 130b can be less than the thickness of the elastic member 132. In some examples, when the elastic member 132 is disposed in the second groove 130b, the thickness of the portion of the elastic member 132 that exceeds the depth of the second groove 130b can serve as the adjustment width between the light output member 131 and the connecting member 130. Thus, the depth to which the first screw a and the second screw b are screwed into the light output member 131 can be adjusted, thereby adjusting the adjustment width.

[0067] In some examples, the first screws a and the second screws b may be evenly distributed around the light output member 131 .

[0068] In some examples, the light emitting member 131 can be connected to a laser. In some examples, the laser can generate a laser beam, which enters the adjustment mechanism 1 through the light emitting member 131. Thus, the adjustment mechanism 1 can receive the laser light generated by the laser and adjust the path of the laser beam.

[0069] In some examples, the laser tracker can be adjusted so that the pitch axis intersects and is perpendicular to the horizontal axis, and the pitch axis intersects and is perpendicular to the optical axis. The laser tracker emits laser light through an adjustment mechanism. In some examples, the laser tracker can be driven to rotate about the horizontal axis by a preset angle, and a pattern formed by the laser beam can be measured. Based on the range of the pattern, the adjustment mechanism can be adjusted so that the pattern is smaller than a preset value. In some examples, a smaller pattern can indicate a higher precision in the adjustment mechanism.

[0070] Figure 6 1 is a schematic diagram showing the adjustment of the light beam by the adjustment mechanism 1 according to the embodiment of the present disclosure. Figure 7 1 is a diagram showing the steps of adjusting the adjustment mechanism 1 according to the embodiment of the present disclosure.

[0071] In some examples, the steps of adjusting the adjustment mechanism 1 may include: adjusting the horizontal axis A1 and the pitch axis A2 (step S10); emitting laser light (step S20); drawing a trajectory of the light beam (step S30); and adjusting the adjustment seat (step S40).

[0072] In some examples, in step S10 , the rotation axis of the laser tracker 200 may be adjusted. In some examples, the horizontal axis A1 and the pitch axis A2 may be adjusted to intersect perpendicularly.

[0073] In some examples, in step S20 , the laser outlet of the laser tracker 200 may be adjusted to face vertically upward. When the laser of the laser tracker 200 emits a laser beam, the beam may enter the adjustment mechanism 1 through the laser and then be emitted from the laser outlet.

[0074] In some examples, in step S30, the horizontal axis A1 of the laser tracker 200 can be rotated so that the laser tracker 200 rotates horizontally by a predetermined angle. The laser beam follows the predetermined angle rotation of the laser tracker 200, drawing a trajectory of the laser beam at the exit. The laser beam forms a trajectory having a specific shape at multiple heights from the exit (different heights from the laser exit). In some examples, the smaller the area of the specific shape formed, the higher the measurement accuracy of the adjustment mechanism 1. In this case, when the area of the specific shape formed is relatively large, if the angle and direction of the laser beam are not adjusted in time to make the area of the specific shape smaller than the preset value, and the laser tracker 200 is continued to be used to measure the tracking target, it is easy to cause large measurement errors.

[0075] In some examples, in step S40, when it is found that the laser beam forms a track with a specific shape at different heights from the exit, multiple adjustment mounts can be adjusted simultaneously until the area of the specific shape is reduced to less than a preset value, at which point the adjustment is complete. In this case, the target can be measured with high accuracy using the laser tracker 200.

[0076] In some examples, the first adjustment seat 11 and the second adjustment seat 12 can be continuously slid during the adjustment process, and the first screw a and the second screw b on the third adjustment can be adjusted to adjust the path of the laser beam, so that the optical axis A3 (that is, the extension direction of the light beam emitted from the exit) and the pitch axis A2 are intersected vertically and intersect with the horizontal axis A1. When the adjustment is completed, the first adjustment seat 11, the second adjustment seat 12, and the third adjustment seat 13 are fixed.

[0077] Although the present disclosure has been described in detail above with reference to the accompanying drawings and examples, it will be understood that the above description does not limit the present disclosure in any form. Those skilled in the art may modify and change the present disclosure as needed without departing from the spirit and scope of the present disclosure, and such modifications and variations all fall within the scope of the present disclosure.

Claims

1. A laser beam adjustment mechanism with multiple degrees of freedom, which is an adjustment mechanism for adjusting the path of the laser beam so that the horizontal axis, pitch axis and optical axis of the laser tracker intersect and are perpendicular, characterized in that: The laser beam emitting device comprises a base, a first adjustment seat movable relative to the base in a first direction, a second adjustment seat movable relative to the base in a second direction, and a third adjustment seat for adjusting an emission direction of the laser beam, wherein the first direction is different from the second direction, the third adjustment seat comprises a connecting member connected to the second adjustment seat, a light emitting member for emitting the laser beam, and an elastic member arranged between the connecting member and the light emitting member, the light emitting member is connected to the connecting member by a plurality of screws, and the emission direction of the laser beam is adjusted by the screws; the light emitting member comprises a plurality of through holes matching the sizes of the plurality of screws, the connecting member comprises a plurality of first grooves matching the sizes of the plurality of screws, the number of the through holes is greater than the number of the first grooves, and the first grooves have threads matching the screws; The multiple screws include multiple first screws and multiple second screws, the number of the through holes is not less than the sum of the number of the first screws and the number of the second screws, and the number of the first grooves is not less than the number of the second screws; the first screws and the second screws are alternately arranged in sequence on the light-emitting component in a manner surrounding the laser beam, the first screw is a top screw, the first screw reaches the surface of the connecting component through the through hole to support the light-emitting component, rotating the first screw changes the distance between the connecting component and the light-emitting component, the second screw reaches the first groove through the through hole, and fixes the light-emitting component to the connecting component via the elastic component, and adjusts the depth of the first screw and the second screw screwed into the through hole so that the contact force between the light-emitting component and the elastic component is balanced.

2. The adjustment mechanism according to claim 1, wherein: The first adjustment seat is slidably mounted on the base, and the first adjustment seat includes a first fixing member for fixing the relative position of the first adjustment seat and the base. The second adjustment seat is slidably mounted on the first adjustment seat, and the second adjustment seat includes a second fixing member for fixing the relative positions of the second adjustment seat and the first adjustment seat.

3. The adjustment mechanism according to claim 1, characterized in that: It also includes a plurality of lenses for reflecting the laser beam. The base, the first adjustment seat, and the second adjustment seat respectively have connected through holes. The laser beam passes through the through holes and is reflected by the lenses before passing through the light exit hole.

4. The adjustment mechanism according to claim 1, wherein: The elastic component is an O-type rubber ring.

5. The adjustment mechanism according to claim 4, wherein: A second groove matching the elastic member is formed on a surface of the connecting member close to the light emitting member. The elastic member is arranged in the second groove. The depth of the second groove is smaller than the thickness of the elastic member.

6. The adjustment mechanism according to claim 1, wherein: The first direction is perpendicular to the second direction.

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