Acousto-optic device
By using positioning blocks and elastic conductive sheets in acousto-optical devices to conduct elastic conductive connections between the bottom electrode and the meter electrode, the problems of diffraction efficiency caused by welding and insolid solder joints are solved, and more efficient conductive reliability is achieved.
Patent Information
- Application Number
- CN202421190137.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In existing acousto-optical devices, metal wire welding connections may increase the actual width of the meter electrode, resulting in a decrease in diffraction efficiency, and the firmness of the solder joints is low, making it easy to cause dummy or desoldering problems.
Using positioning blocks, first elastic conductive sheets and second elastic conductive sheets, the conductive connection between the bottom electrode and the meter electrode is realized through the elastic section and the contact part, avoiding the use of welded metal wires, ensuring the improvement of conductive reliability and diffraction efficiency. .
This design improves the diffraction efficiency of acousto-optical devices, avoids dummy or desoldering of solder joints, and ensures the reliability of conductive connections.
Smart Images
Figure CN222259755U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of acousto-optic devices, in particular to an acousto-optic device. Background Art
[0002] At present, existing acousto-optic devices such as Figure 1 As shown, it is mainly composed of a heat sink 1a, a bracket 2a, an acousto-optic crystal medium 3a, a matching circuit 4a, an ultrasonic generating part 5a, etc.
[0003] The ultrasonic generating part 5a includes a bottom electrode, a piezoelectric transducer 51a, and a surface electrode 52a, and the bottom electrode and the surface electrode 52a are both made of gold, silver, etc. Usually, a metal wire 6a (for example, copper, iron, gold, etc.) is welded between the surface electrode 52a and the matching circuit 4a, so that the ultrasonic generating part 5a and the matching circuit 4a are electrically connected.
[0004] In the design of acousto-optic devices, diffraction efficiency is one of the important parameters. According to the diffraction efficiency formula:
[0005]
[0006] It can be seen that reducing the surface electrode width H can improve the diffraction efficiency, and the surface electrode width H is related to the spot size of the incident laser and is generally slightly larger than the diameter of the incident spot.
[0007] If the width of the solder joint of the metal wire 6a is greater than the width of the surface electrode 52a, as Figure 2 As shown, it is equivalent to increasing the actual width of the surface electrode, which leads to a decrease in the diffraction efficiency η. In addition, the solder joint will also contact the piezoelectric transducer 51a (material that can produce piezoelectric effect). Due to the different materials in contact, the solder joint has a low degree of firmness, and the solder joint of the metal wire is prone to problems such as cold soldering or desoldering. Utility Model Content
[0008] The technical problem to be solved by the utility model is that the use of metal wire welding connection may increase the actual width of the surface electrode, resulting in a decrease in the diffraction efficiency η; the soldering point will also contact the piezoelectric transducer, the firmness of the soldering point is relatively low, and the soldering point of the metal wire is prone to problems such as cold soldering or desoldering.
[0009] In order to solve the above technical problems, the utility model provides an acousto-optic device:
[0010] The acousto-optic device comprises a positioning block, a first elastic conductive sheet, a second elastic conductive sheet, a bottom electrode, a piezoelectric transducer and a surface electrode, wherein the first elastic conductive sheet and the second elastic conductive sheet are respectively fixedly connected to the positioning block;
[0011] The bottom electrode is arranged at intervals on a side of the positioning block corresponding to the elastic conductive sheet, and the bottom electrode, the piezoelectric transducer and the surface electrode are sequentially stacked and arranged in a direction close to the positioning block;
[0012] The first elastic conductive sheet and the second elastic conductive sheet each have an elastic section located between the positioning block and the bottom electrode, and a contact portion protruding toward the bottom electrode;
[0013] The contact portion of the first elastic conductive sheet is elastically pressed and matched with the surface electrode, and the contact portion of the second elastic conductive sheet is elastically pressed and matched with the bottom electrode.
[0014] Furthermore, the first elastic conductive sheet and the second elastic conductive sheet also have a fixed section, the fixed section of the first elastic conductive sheet, the elastic section of the first elastic conductive sheet and the contact portion of the first elastic conductive sheet are connected as a whole, and the fixed section of the second elastic conductive sheet, the elastic section of the second elastic conductive sheet and the contact portion of the second elastic conductive sheet are connected as a whole.
[0015] Furthermore, the fixing section is fixedly connected to the positioning block, the fixing section is connected to the elastic section to form a U-shaped opening, and the contact portion is protruded toward a side away from the fixing section.
[0016] Furthermore, the fixing section is provided with a through hole, the positioning block is provided with a corresponding threaded hole, and fastening bolts are installed in the through hole and the threaded hole.
[0017] Furthermore, the positioning block is provided with two positioning grooves, the two positioning grooves are distributed in parallel and at intervals, the two positioning grooves are respectively provided with the threaded holes, and the two threaded holes are arranged at intervals along the extension direction of the positioning grooves.
[0018] Further, the U-shaped opening of the first elastic conductive sheet is arranged opposite to the U-shaped opening of the second elastic conductive sheet; or, the U-shaped opening of the first elastic conductive sheet is arranged opposite to the U-shaped opening of the second elastic conductive sheet.
[0019] Furthermore, the squeezing force between the first elastic conductive sheet and the surface electrode is 80-120 gf.
[0020] Furthermore, the surface roughness Ra of the first elastic conductive sheet and the second elastic conductive sheet is 1.6-6.3, and the surface roughness Ra of the surface electrode is 0.025-0.1.
[0021] Furthermore, the positioning block is an insulating resin block, and the first elastic conductive sheet and the second elastic conductive sheet are both metal spring sheets.
[0022] Furthermore, the acousto-optic device also includes a bracket, a heat sink and an acousto-optic crystal medium. The heat sink is arranged on the upper part of the bracket, the acousto-optic crystal medium is installed between the heat sink and the bracket, the bottom electrode, the piezoelectric transducer and the surface electrode are all fixed on the acousto-optic crystal medium, and the positioning block is bolted to the bracket and the heat sink respectively.
[0023] Compared with the prior art, the acousto-optic device of the utility model has the following beneficial effects: the acousto-optic device adopts a design form of a positioning block, a first elastic conductive sheet, a second elastic conductive sheet, a bottom electrode, a piezoelectric transducer and a surface electrode, the first elastic conductive sheet and the second elastic conductive sheet are respectively fixed on the positioning block, the bottom electrode and the positioning block are arranged at intervals, and the bottom electrode, the piezoelectric transducer and the surface electrode are sequentially stacked and arranged in a direction close to the positioning block. The first elastic conductive sheet and the second elastic conductive sheet are between the positioning block and the bottom electrode, and the two elastic conductive sheets are used to achieve the purpose of conductive connection with the surface electrode and the bottom electrode respectively.
[0024] Among them, both elastic conductive sheets have an elastic section located between the positioning block and the bottom electrode, and a contact portion protruding toward the bottom electrode. The elastic section of the first elastic conductive sheet is used to make the contact portion produce an elastic squeezing effect on the surface electrode, which not only realizes the conductive connection between the first elastic conductive sheet and the surface electrode only, but also ensures the diffraction efficiency of the acousto-optic device.
[0025] In addition, the elastic section of the second elastic conductive sheet is used to make the contact part produce an elastic squeezing effect on the bottom electrode, thereby realizing the conductive connection between the second elastic conductive sheet and the bottom electrode. Compared with the method of welding metal wires, it can prevent the welding points of the metal wires from being prone to problems such as cold welding or desoldering, avoid the first elastic conductive sheet from possibly contacting the piezoelectric transducer, and ensure the conductive reliability of the contact points. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the structure of an existing acousto-optic device in the background technology;
[0027] Figure 2 It is a partial diagram of the welding point between the metal wire and the surface electrode of the existing acousto-optic device in the background technology;
[0028] Figure 3 is a schematic top view of an acousto-optic device in an embodiment of the utility model;
[0029] Figure 4 is a schematic front view of the acousto-optic device in an embodiment of the utility model;
[0030] Figure 5 It is a three-dimensional schematic diagram of the first elastic conductive sheet of the acousto-optic device in the embodiment of the utility model;
[0031] Figure 6It is a three-dimensional schematic diagram of a positioning block of an acousto-optic device in an embodiment of the utility model;
[0032] Figure 7 is a schematic top view of an acousto-optic device in other embodiments of the utility model;
[0033] Figure 8 is a schematic front view of an acousto-optic device in other embodiments of the utility model;
[0034] Figure 1 , Figure 2 Middle: 1a-heat sink, 2a-bracket, 3a-acoustic-optic crystal medium, 4a-matching circuit, 5a-ultrasonic wave generating part, 51a-piezoelectric transducer, 52a-surface electrode, 6a-metal wire;
[0035] Figures 3 to 8 Middle: 1-positioning block, 10-threaded hole, 11-positioning groove, 2-first elastic conductive sheet, 20-U-shaped opening, 21-elastic section, 22-contact portion, 23-fixed section, 24-perforation, 3-second elastic conductive sheet, 4-acoustic-optic crystal medium, 41-bottom electrode, 42-piezoelectric transducer, 43-surface electrode, 5-heat sink, 6-bracket. DETAILED DESCRIPTION
[0036] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] like Figures 3 to 6 As shown, an acousto-optic device of an embodiment of the utility model includes a positioning block 1, a first elastic conductive sheet 2, a second elastic conductive sheet 3, a bottom electrode 41, a piezoelectric transducer 42 and a surface electrode 43, wherein the first elastic conductive sheet 2 and the second elastic conductive sheet 3 are respectively fixedly connected to the positioning block 1; the bottom electrode 41 is arranged at intervals on one side of the positioning block 1 corresponding to the elastic conductive sheet, and the bottom electrode 41, the piezoelectric transducer 42 and the surface electrode 43 are sequentially stacked and arranged in a direction close to the positioning block 1.
[0041] The first elastic conductive sheet 2 and the second elastic conductive sheet 3 both have an elastic section 21 located between the positioning block 1 and the bottom electrode 41, and a contact portion 22 protruding toward the bottom electrode 41; the contact portion 22 of the first elastic conductive sheet 2 is elastically squeezed and matched with the surface electrode 43, and the contact portion 22 of the second elastic conductive sheet 3 is elastically squeezed and matched with the bottom electrode 41.
[0042] The acousto-optic device adopts a design form of a positioning block 1, a first elastic conductive sheet 2, a second elastic conductive sheet 3, a bottom electrode 41, a piezoelectric transducer 42 and a surface electrode 43. The first elastic conductive sheet 2 and the second elastic conductive sheet 3 are respectively fixed on the positioning block 1, the bottom electrode 41 is arranged at intervals from the positioning block 1, and the bottom electrode 41, the piezoelectric transducer 42 and the surface electrode 43 are sequentially stacked and arranged in a direction close to the positioning block 1. The first elastic conductive sheet 2 and the second elastic conductive sheet 3 are located between the positioning block 1 and the bottom electrode 41, and are used to achieve conductive connection with the surface electrode 43 and the bottom electrode 41 through the two elastic conductive sheets.
[0043] Among them, both elastic conductive sheets have an elastic segment 21 located between the positioning block 1 and the bottom electrode 41, and a contact portion 22 protruding toward the bottom electrode 41. The elastic segment 21 of the first elastic conductive sheet 2 is used to make the contact portion 22 produce an elastic squeezing effect on the surface electrode 43, which not only realizes the conductive connection between the first elastic conductive sheet 2 and the surface electrode 43, but also ensures the diffraction efficiency of the acousto-optic device.
[0044] In addition, the elastic section 21 of the second elastic conductive sheet 3 is used to make the contact portion 22 exert an elastic extrusion effect on the bottom electrode 41, thereby realizing the conductive connection between the second elastic conductive sheet 3 and the bottom electrode 41. Compared with the method of welding metal wires, it can prevent the welding points of the metal wires from being easily damaged or desoldering, and avoid the first elastic conductive sheet 2 from possibly contacting the piezoelectric transducer 42, thereby ensuring the conductive reliability of the contact points.
[0045] In this embodiment, the first elastic conductive sheet 2 and the second elastic conductive sheet 3 further have a fixed section 23, the fixed section 23 of the first elastic conductive sheet 2, the elastic section 21 of the first elastic conductive sheet 2 and the contact portion 22 of the first elastic conductive sheet 2 are connected as one body, and the fixed section 23 of the second elastic conductive sheet 3, the elastic section 21 of the second elastic conductive sheet 3 and the contact portion 22 of the second elastic conductive sheet 3 are connected as one body. Both elastic conductive sheets are an integrated structure of the fixed section 23, the elastic section 21 and the contact portion 22, which ensures that the elastic conductive sheet can produce a reliable elastic extrusion effect on the surface electrode 43 or the bottom electrode 41.
[0046] Specifically, the fixed section 23 is fixedly connected to the positioning block 1, and the fixed section 23 is connected to the elastic section 21 to form a U-shaped opening 20, and the contact portion 22 is protruded toward the side away from the fixed section 23. The structural design of the U-shaped opening 20 enables the elastic conductive sheet to have a good spring stroke, which facilitates the assembly connection between the fixed section 23 and the positioning block 1. As a further preferred solution, a through hole 24 is provided on the fixed section 23, and a threaded hole 10 is correspondingly provided on the positioning block 1, and fastening bolts are installed in the through hole 24 and the threaded hole 10.
[0047] In addition, two positioning grooves 11 are arranged on the positioning block 1, and the two positioning grooves 11 are arranged in parallel and at intervals. The two positioning grooves 11 are respectively provided with threaded holes 10, and the two threaded holes 10 are arranged at intervals along the extension direction of the positioning grooves 11. By utilizing the distribution of the two positioning grooves 11 and the two threaded holes 10, the two elastic conductive sheets are staggered on one side plane of the positioning block 1 to avoid position interference and the accuracy of conductive contact.
[0048] In this embodiment, the U-shaped opening 20 of the first elastic conductive sheet 2 is arranged opposite to the U-shaped opening 20 of the second elastic conductive sheet 3. As a further preferred embodiment, the extrusion force between the first elastic conductive sheet 2 and the surface electrode 43 is 80-120 gf. The surface roughness Ra of the first elastic conductive sheet 2 and the second elastic conductive sheet 3 is 1.6-6.3, and the surface roughness Ra of the surface electrode 43 is 0.025-0.1. The positioning block 1 is an insulating resin block, and the first elastic conductive sheet 2 and the second elastic conductive sheet 3 are both metal springs.
[0049] The other embodiments of the present invention are different from the above embodiments of the present invention in that the U-shaped opening 20 of the first elastic conductive sheet 2 and the U-shaped opening 20 of the second elastic conductive sheet 3 are arranged opposite to each other. Figure 7 , Figure 8 In addition, the acousto-optic device further comprises a bracket 6, a heat sink 5 and an acousto-optic crystal medium 4, the heat sink 5 is arranged on the upper part of the bracket 6, the acousto-optic crystal medium 4 is installed between the heat sink 5 and the bracket 6, the bottom electrode 41, the piezoelectric transducer 42 and the surface electrode 43 are all fixed on the acousto-optic crystal medium 4, and the positioning block 1 is bolted to the bracket 6 and the heat sink 5 respectively.
[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. An acousto-optic device, characterized in that: It comprises a positioning block, a first elastic conductive sheet, a second elastic conductive sheet, a bottom electrode, a piezoelectric transducer and a surface electrode, wherein the first elastic conductive sheet and the second elastic conductive sheet are respectively fixedly connected to the positioning block; The bottom electrode is arranged at intervals on a side of the positioning block corresponding to the elastic conductive sheet, and the bottom electrode, the piezoelectric transducer and the surface electrode are sequentially stacked and arranged in a direction close to the positioning block; The first elastic conductive sheet and the second elastic conductive sheet each have an elastic section located between the positioning block and the bottom electrode, and a contact portion protruding toward the bottom electrode; The contact portion of the first elastic conductive sheet is elastically pressed and matched with the surface electrode, and the contact portion of the second elastic conductive sheet is elastically pressed and matched with the bottom electrode.
2. The acousto-optic device according to claim 1, characterized in that: The first elastic conductive sheet and the second elastic conductive sheet also have a fixed section, the fixed section of the first elastic conductive sheet, the elastic section of the first elastic conductive sheet and the contact portion of the first elastic conductive sheet are connected as one, and the fixed section of the second elastic conductive sheet, the elastic section of the second elastic conductive sheet and the contact portion of the second elastic conductive sheet are connected as one.
3. The acousto-optic device according to claim 2, characterized in that: The fixing section is fixedly connected to the positioning block, the fixing section is connected to the elastic section to form a U-shaped opening, and the contact portion is protruded toward a side away from the fixing section.
4. The acousto-optic device according to claim 2, characterized in that: The fixing section is provided with a through hole, the positioning block is provided with a threaded hole correspondingly, and fastening bolts are installed in the through hole and the threaded hole.
5. The acousto-optic device according to claim 4, characterized in that: The positioning block is provided with two positioning grooves, the two positioning grooves are parallel and spaced apart, the two positioning grooves are respectively provided with the threaded holes, and the two threaded holes are spaced apart along the extending direction of the positioning grooves.
6. The acousto-optic device according to claim 3, characterized in that: The U-shaped opening of the first elastic conductive sheet is arranged opposite to the U-shaped opening of the second elastic conductive sheet; or, the U-shaped opening of the first elastic conductive sheet is arranged opposite to the U-shaped opening of the second elastic conductive sheet.
7. The acousto-optic device according to claim 1, characterized in that: The squeezing force between the first elastic conductive sheet and the surface electrode is 80-120 gf.
8. The acousto-optic device according to claim 1, characterized in that: The surface roughness Ra of the first elastic conductive sheet and the second elastic conductive sheet is 1.6-6.3, and the surface roughness Ra of the surface electrode is 0.025-0.
1.
9. The acousto-optic device according to claim 1, characterized in that: The positioning block is an insulating resin block, and the first elastic conductive sheet and the second elastic conductive sheet are both metal spring sheets.
10. The acousto-optic device according to claim 1, characterized in that: The acousto-optic device also includes a bracket, a heat sink and an acousto-optic crystal medium. The heat sink is arranged on the upper part of the bracket, the acousto-optic crystal medium is installed between the heat sink and the bracket, the bottom electrode, the piezoelectric transducer and the surface electrode are all fixed on the acousto-optic crystal medium, and the positioning block is bolted to the bracket and the heat sink respectively.