An auxiliary device for processing sound absorbing surface of acousto-optic crystal

Abstract

The utility model relates to crystal processing auxiliary device technical field discloses a kind of for processing acoustooptic crystal sound-absorbing surface auxiliary device, including bottom plate, for providing support base;Upper plate, for placing acoustooptic crystal;Pitch adjustment component and rotary adjustment component, pitch adjustment component is set between bottom plate and upper plate, for adjusting the pitch angle of upper plate relative to pedestal, rotary adjustment component is set on upper plate, for adjusting the rotary angle of acoustooptic crystal carried by upper plate;Fixing component, for the position of fixed after adjusting pitch angle, rotary angle and acoustooptic crystal, to facilitate by cutting to form two-dimensional bevel sound-absorbing surface. By two-dimensional angle adjustment and stress-free fixing structure, reduce ultrasonic field reflection interference, improve crystal efficiency, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of crystal processing auxiliary devices, and more specifically, to an auxiliary device for processing the sound-absorbing surface of acousto-optic crystals. Background Technology

[0002] As a key component in laser equipment, the structure of the sound-absorbing surface of an acousto-optic crystal directly affects the propagation efficiency of the ultrasonic field. In existing technologies, the sound-absorbing surface of acousto-optic crystals is often produced by one-dimensional bevel cutting or roughening, leading to the following problems:

[0003] Ultrasonic field interference: After the ultrasonic field propagates to a one-dimensional oblique sound-absorbing surface, it is easily reflected in the same plane inside the crystal or even returns along the original path, interfering with the stable propagation of the main ultrasonic field.

[0004] Low efficiency: The superposition of the reflected ultrasonic field and the main ultrasonic field leads to increased energy loss and reduced crystal efficiency conversion performance.

[0005] Heat accumulation and noise: Reflected energy is converted into heat energy, which leads to heat accumulation inside the crystal; when applied to high-response laser equipment, it is prone to generating noise and shortening the lifespan of the device.

[0006] Therefore, an auxiliary device is needed to process the acoustic-optical crystal sound-absorbing surface, which can achieve precise two-dimensional angle adjustment and fix the crystal angle, in order to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide an auxiliary device for processing the sound-absorbing surface of acousto-optic crystals, in order to solve the problems existing in the prior art. Through two-dimensional angle adjustment and stress-free fixing structure, it reduces ultrasonic field reflection interference, improves crystal efficiency, and extends service life.

[0008] To achieve the above objectives, this utility model provides the following solution: This utility model provides an auxiliary device for processing the sound-absorbing surface of an acousto-optic crystal, including a base plate for providing a supporting foundation; an upper plate for placing the acousto-optic crystal; a pitch adjustment component and a rotation adjustment component, wherein the pitch adjustment component is disposed between the base plate and the upper plate for adjusting the pitch angle of the upper plate relative to the base plate, and the rotation adjustment component is disposed on the upper plate for adjusting the rotation angle of the acousto-optic crystal carried by the upper plate; and a fixing component for fixing the adjusted pitch angle, rotation angle, and position of the acousto-optic crystal, so as to facilitate the formation of a two-dimensional beveled sound-absorbing surface by cutting.

[0009] According to the present invention, an auxiliary device for processing acoustic-optic crystal sound-absorbing surfaces is provided. The pitch adjustment assembly includes a first knob, a connecting rod, a flat-headed rotating rod, and a first elastic element. One end of the connecting rod is fixedly connected to the base plate, and the other end is threadedly connected to the first knob. The connecting rod has a hollow cavity inside. One end of the first knob extends into the hollow cavity. The first elastic element is located in the hollow cavity and abuts against one end of the first knob. One end of the flat-headed rotating rod is fixedly connected to the upper plate, and the other end is engaged at the bottom of the first knob and connected to the first elastic element.

[0010] According to the present invention, an auxiliary device for processing the sound-absorbing surface of an acousto-optic crystal is provided. The first elastic element includes a first spring and a second spring. One end of the first spring abuts against the threaded surface of the first knob, and the other end abuts against the stepped surface of the hollow cavity inside the connecting rod. A groove is provided at the bottom of the first knob, and the second spring is disposed in the groove. The flat-headed rotating rod is engaged in the groove and abuts against the first spring.

[0011] According to the present invention, an auxiliary device for processing acoustic-optic crystal sound-absorbing surfaces is provided. The rotation adjustment component includes a second knob, a rotating shaft, and a second elastic element. The rotating shaft is connected to the upper plate through a base. The second elastic element is installed between the rotating shaft and the base, so that the rotating shaft and the base form a rotational connection. The second knob passes through an L-shaped fixing plate and abuts against the rotating shaft. The L-shaped fixing plate is fixedly connected to one side of the upper plate.

[0012] According to the present invention, an auxiliary device for processing acoustic-optic crystal sound-absorbing surfaces is provided, wherein the second elastic element includes a third spring, a cylindrical protrusion is provided on the side wall of the base, one end of the third spring is sleeved on the cylindrical protrusion, and the other end is fixedly connected to one side of the rotating shaft.

[0013] According to the present invention, an auxiliary device for processing the sound-absorbing surface of an acousto-optic crystal is provided. The fixing component includes a first glass block, a second glass block, a third glass block, and an adhesive. The first glass block is disposed on the base plate, and the second and third glass blocks are disposed on the upper plate and bonded together through a through hole. The acousto-optic crystal is placed on the third glass block. The adhesive is used to fill the gap between the first, second, and third glass blocks to facilitate the adjustment of the angle and to bond and fix the acousto-optic crystal to the third glass block.

[0014] According to the present invention, an auxiliary device for processing the sound-absorbing surface of an acousto-optic crystal is provided. The fixing component further includes a glass block, which is bonded to the side wall of the acousto-optic crystal and to the rotating shaft rod, for transmitting the rotation angle to the acousto-optic crystal.

[0015] According to the present invention, an auxiliary device for processing acoustic-optic crystal sound-absorbing surfaces is provided, wherein a threaded hole is provided on the L-shaped fixing plate, the second knob passes through the threaded hole, and its end abuts against the rotating shaft.

[0016] The present invention discloses the following technical effects:

[0017] This invention includes a pitch adjustment component to adjust the pitch angle of the acousto-optic crystal and ensure that the pitch angle α is stable and controllable; a rotation adjustment component to adjust the rotation angle β of the acousto-optic crystal and ensure that the rotation angle β is precisely adjusted and the initial 0° calibration is reliable. The pitch and rotation adjustment components work together to achieve two-dimensional angle (α+β) adjustment. The cut sound-absorbing surface allows for multi-dimensional scattering of the ultrasonic field, avoiding reflection along the original path and solving the defects of one-dimensional oblique angles; a fixing component is provided to prevent the acousto-optic crystal from being subjected to mechanical clamping stress and to prevent lattice damage caused by stress. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a side view of the entire utility model;

[0021] Figure 3 This is a top view of the entire utility model;

[0022] Figure 4 This is a schematic diagram of the pitch adjustment component in this utility model;

[0023] Figure 5 This is a schematic diagram of the rotary adjustment component in this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the device of this utility model when cutting an acousto-optic crystal;

[0025] Figure 7This is a schematic diagram of the cutting of the two-dimensional oblique sound-absorbing surface of the acousto-optic crystal in this utility model;

[0026] The components are as follows: 1. Base plate; 2. Top plate; 3. Connecting rod; 4. First knob; 5. Rotating shaft; 6. L-shaped fixing plate; 7. Second knob; 8. First glass block; 9. Second glass block; 10. Third glass block; 11. Acoustic-optical crystal; 12. Glass mounting block; 13. First spring; 14. Second spring; 15. Flat-headed rotating rod; 16. Base; 17. Third spring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-7 As shown, this utility model provides an auxiliary device for processing the sound-absorbing surface of an acousto-optic crystal, comprising: a base plate 1 for providing a supporting foundation; an upper plate 2 for placing the acousto-optic crystal 11; a pitch adjustment component and a rotation adjustment component, wherein the pitch adjustment component is disposed between the base plate 1 and the upper plate 2 for adjusting the pitch angle of the upper plate 2 relative to the base plate 1, and the rotation adjustment component is disposed on the upper plate 2 for adjusting the rotation angle of the acousto-optic crystal 11 carried by the upper plate 2; and a fixing component for fixing the adjusted pitch angle, rotation angle, and position of the acousto-optic crystal 11, so as to facilitate the formation of a two-dimensional oblique sound-absorbing surface by cutting.

[0030] The base plate 1 provides a supporting foundation for the overall structure, and the upper plate 2 is used to support the acousto-optic crystal 11. The pitch adjustment component is set between the base plate 1 and the upper plate 2 to adjust the pitch angle α of the upper plate 2 relative to the base plate 1. The rotation adjustment component is set on the upper plate 2 to adjust the rotation angle β of the acousto-optic crystal 11 supported by the upper plate 2. The fixing component is used to fix the adjusted pitch angle α, rotation angle β and the position of the acousto-optic crystal 11 so as to form a two-dimensional oblique sound-absorbing surface by cutting.

[0031] The pitch adjustment assembly includes a first knob 4, a connecting rod 3, a flat-headed rotary rod 15, and a first elastic element. The first elastic element includes a first spring 13 and a second spring 14. The connecting rod 3 is welded to one side of the base plate 1, and its other end is threaded to the first knob 4. The connecting rod 3 has a hollow cavity inside, which is stepped. The first spring 13 is sleeved in the hollow cavity and is sleeved to the shaft end of the first knob 4. One end of the first spring 13 abuts against the threaded surface of the first knob 4, and the other end abuts against the stepped surface of the hollow cavity inside the connecting rod 3. The first spring 13 forms an axial preload. The tension is used to prevent the first knob 4 from rotating back due to the reaction force of the flat-headed rotating rod 15, ensuring stable locking after the pitch angle is adjusted; a groove is provided at the bottom of the first knob 4, one end of the flat-headed rotating rod 15 is fixedly connected to one side below the upper plate 2, and the other end of the flat-headed rotating rod 15 is a flat end, which is engaged in the groove. The second spring 14 is set in the groove, one end of the second spring 14 abuts against the side wall of the groove, and the other end abuts against the flat end of the flat-headed rotating rod 15, forming a lateral pre-tension force. The second spring 14 is used to maintain the stable position of the flat-headed rotating rod 15 during the adjustment process.

[0032] When the first knob 4 is rotated, it rotates axially inside the hollow cavity of the connecting rod 3. Through the engagement between the groove and the flat-headed rotating rod 15, it drives the upper plate 2 to rotate around the base plate 1, thereby adjusting the pitch angle α (adjustment range 0°-45°). At this time, the first spring 13 counteracts the reaction force of the flat-headed rotating rod 15 on the first knob 4 through axial elasticity, preventing the knob from rotating back. The second spring 14 ensures that the flat-headed rotating rod 15 always fits against the side wall of the groove through lateral elasticity, avoiding jamming or angle deviation due to gaps during adjustment, and ensuring that the angle α is stable and reliable.

[0033] The rotary adjustment assembly includes a second knob 7, a rotating shaft 5, and a second elastic element. The second elastic element includes a third spring 17. The rotating shaft 5 is connected to the upper plate 2 via a base 16. The second knob 7 passes through an L-shaped fixing plate 6 and abuts against the rotating shaft 5. The L-shaped fixing plate 6 is fixedly connected to the side wall of the upper plate 2 and has a threaded hole. The second knob 7 abuts against the rotating shaft 5 through the threaded hole. The side wall of the base 16 has a cylindrical protrusion. One end of the second spring 14 is sleeved on the cylindrical protrusion, and the other end is fixedly connected to the rotating shaft 5.

[0034] When the second knob 7 is rotated, its screw advances axially along the threaded hole of the L-shaped fixing plate 6, pushing the rotating shaft 5 to rotate around the pin of the base 16. The vertical section of the rotating shaft 5 drives the acousto-optic crystal 11 to rotate synchronously through the glass block 12, thereby adjusting the rotation angle β. The third spring 17 ensures that the rotating shaft 5 is always in close contact with the end of the second knob 7 through continuous lateral elastic force, eliminating the angle error caused by the gap. In the initial state, the edge of the rotating shaft 5 is close to the base 16 and flush with the edge of the upper plate 2, ensuring accurate zero-point calibration of the rotation angle β.

[0035] The fixing assembly includes a first glass block 8, a second glass block 9, a third glass block 10, and an adhesive. A groove for placing the first glass block 8 is provided on the base plate 1, and the first glass block 8 is embedded in the groove, with its thickness greater than the depth of the groove. The upper plate 2 is provided with the second glass block 9 and the third glass block 10. A through hole is provided on the upper plate 2, the length and width of which are the same as the groove on the base plate 1. The second glass block 9 is connected to the third glass block 10 through the through hole, and the second glass block 9 protrudes downwards from the upper plate 2. The third glass block 10 is laid flat on the top surface of the upper plate 2, and the acousto-optic crystal 11 is placed on the third glass block 10. The adhesive is a thermosetting adhesive used to fill the gaps between the first glass block 8, the second glass block 9, and the third glass block 10 to facilitate angle adjustment and to bond and fix the acousto-optic crystal 11 to the third glass block 10.

[0036] The fixing assembly also includes a glass patch, with one side of the glass patch 12 bonded to the side wall of the acousto-optic crystal 11 and the other side bonded to the rotating shaft 5 of the rotation adjustment assembly, for transmitting the rotation angle to the acousto-optic crystal 11.

[0037] After the pitch angle α and rotation angle β are adjusted, an adhesive is injected into the gap between the first glass block 8 and the second glass block 9, and into the gap between the acousto-optic crystal 11 and the third glass block 10. After being heated and cured at 80°C for 30 minutes, the adhesive forms a rigid connection, fixing the angle α between the first glass block 8 and the second glass block 9, and fixing the angle β between the third glass block 10 and the acousto-optic crystal 11. The entire structure becomes an integrated rigid body, ensuring that there is no angle deviation during subsequent cutting.

[0038] During cutting, remove the rotating shaft 5 to avoid interference, and cut along a direction perpendicular to the first glass block 8. Figure 7 Cutting the acousto-optic crystal 11 along the Z-axis (center) creates a two-dimensional oblique sound-absorbing surface that simultaneously incorporates pitch angle α and rotation angle β. This two-dimensional angle design disperses the reflected ultrasonic field along three-dimensional space, preventing it from returning along its original path and interfering with the main ultrasonic field, thus fundamentally solving the defects of traditional one-dimensional oblique structures.

[0039] When the base plate 1 and the upper plate 2 are closed, the parallelism accuracy error is controlled within 0.05mm, and a gap space is left between the base plate 1 and the upper plate 2 when they are closed.

[0040] The bottom of the rotating shaft 5 is higher than the third glass block 10, which facilitates the rotation of the rotating shaft 5.

[0041] Before adjusting the second knob 7, the edge of the rotating shaft 5 is flush with the edge of the upper plate 2 after it is close to the base 16, ensuring that the initial rotation angle is 0 degrees. When cutting the sound-absorbing surface of the acoustic crystal 11, cut along the direction perpendicular to the first glass block 8.

[0042] In this invention, the adjustment of the two-dimensional angle is precise and stable. In the pitch adjustment assembly, the threaded engagement between the first knob 4 and the connecting rod 3 enables continuous angle adjustment. The second spring 14 and the first spring 13 eliminate gaps from the axial and lateral directions, respectively, ensuring that the pitch angle α adjustment accuracy is ≤0.5°. In the rotation adjustment assembly, the threaded engagement between the second knob 7 and the L-shaped fixing plate 6 pushes the rotating shaft 5, and the third spring 17 ensures tight contact, with the rotation angle β adjustment accuracy ≤0.5°. The two work together to achieve precise control of the two-dimensional angle.

[0043] In this invention, the stress-free fixing method ensures the performance of the crystal. The fixing component fixes the angle through the rigid connection between the first glass block 8, the second glass block 9 and the adhesive. When the glass patch 12 transmits the rotation angle, it avoids the crystal being directly subjected to force. The flexible curing characteristics of the adhesive (shear strength ≥15MPa after curing) ensure that the crystal is stress-free and the stress deformation of the crystal after processing is ≤0.01mm / m.

[0044] This invention optimizes the characteristics of the ultrasonic field and improves the performance of the device. The two-dimensional oblique sound-absorbing surface disperses the reflected ultrasonic field, reducing the reflected energy by more than 60%, improving the stability of the main ultrasonic field, and increasing the efficiency conversion performance to more than 90%. At the same time, heat accumulation is reduced, the modulation noise of the laser equipment is reduced by 30%, and the service life of the acousto-optic device is extended to more than 8,000 hours, which is significantly better than the traditional structure.

[0045] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An auxiliary device for processing the sound-absorbing surface of an acousto-optic crystal, characterized in that, include: Base plate (1), used to provide a supporting foundation; The upper plate (2) is used to place the acousto-optic crystal (11); The pitch adjustment component and the rotation adjustment component are provided. The pitch adjustment component is disposed between the base plate (1) and the upper plate (2) and is used to adjust the pitch angle of the upper plate (2) relative to the base plate (1). The rotation adjustment component is disposed on the upper plate (2) and is used to adjust the rotation angle of the acousto-optic crystal (11) carried by the upper plate (2). A fixing component is used to fix the adjusted pitch angle, rotation angle and the position of the acousto-optic crystal (11) so as to form a two-dimensional oblique sound-absorbing surface by cutting.

2. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 1, characterized in that: The pitch adjustment assembly includes a first knob (4), a connecting rod (3), a flat-headed rotary rod (15), and a first elastic element. One end of the connecting rod (3) is fixedly connected to the base plate (1), and the other end is threadedly connected to the first knob (4). The connecting rod (3) has a hollow cavity inside. One end of the first knob (4) extends into the hollow cavity. The first elastic element is located in the hollow cavity and abuts against one end of the first knob (4). One end of the flat-headed rotary rod (15) is fixedly connected to the upper plate (2), and the other end is locked at the bottom of the first knob (4) and connected to the first elastic element.

3. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 2, characterized in that: The first elastic element includes a first spring (13) and a second spring (14). One end of the first spring (13) abuts against the threaded surface of the first knob (4), and the other end abuts against the stepped surface of the hollow cavity inside the connecting rod (3). A groove is provided at the bottom of the first knob (4), and the second spring (14) is disposed in the groove. The flat-headed rotating rod (15) is engaged in the groove and abuts against the first spring (13).

4. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 1, characterized in that: The rotation adjustment assembly includes a second knob (7), a rotating shaft (5), and a second elastic element. The rotating shaft (5) is connected to the upper plate (2) via a base (16). The second elastic element is installed between the rotating shaft (5) and the base (16), so that the rotating shaft (5) and the base (16) form a rotational connection. The second knob (7) passes through an L-shaped fixing plate (6) and abuts against the rotating shaft (5). The L-shaped fixing plate (6) is fixedly connected to one side of the upper plate (2).

5. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 4, characterized in that: The second elastic element includes a third spring (17). A cylindrical protrusion is provided on the side wall of the base (16). One end of the third spring (17) is sleeved on the cylindrical protrusion, and the other end is fixedly connected to one side of the rotating shaft (5).

6. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 4, characterized in that: The fixing assembly includes a first glass block (8), a second glass block (9), a third glass block (10), and an adhesive. The first glass block (8) is disposed on the base plate (1), the second glass block (9) and the third glass block (10) are disposed on the upper plate (2) and bonded through a through hole. The acousto-optic crystal (11) is placed on the third glass block (10). The adhesive is used to fill the gap between the first glass block (8), the second glass block (9), and the third glass block (10) to facilitate the fixed adjustment angle and to bond and fix the acousto-optic crystal (11) to the third glass block (10).

7. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 6, characterized in that: The fixing assembly also includes a glass patch (12), which is bonded to the side wall of the acousto-optic crystal (11) and to the rotating shaft (5) for transmitting the rotation angle to the acousto-optic crystal (11).

8. The auxiliary device for processing the acoustic-optic crystal sound-absorbing surface according to claim 4, characterized in that: The L-shaped fixing plate (6) has a threaded hole, and the second knob (7) passes through the threaded hole, with its end abutting against the rotating shaft (5).

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