Laser gyroscope getter assembly and laser gyroscope

Abstract

The invention relates to a laser gyroscope getter assembly and a laser gyroscope, the getter assembly comprises a tray, a getter, a sheet and a pressing piece, the getter is arranged in the tray and is of an annular structure, and the height of the outer side of the getter is higher than that of the inner side of the getter; the thin sheet covers the getter, and the pressing piece is tightly pressed on the thin sheet. The device has the beneficial effects that the structure is simple, the design is reasonable, the getter is placed upwards, the getter is directly sprayed out after being activated, and the barium obtaining amount of the getter can meet the design requirement; meanwhile, the getter is not directly sprayed to the tray when activated, the tray temperature is low, and the tray has no melting risk.

Description

Technical Field

[0001] This invention relates to the field of laser gyroscope technology, specifically to a laser gyroscope getter assembly and a laser gyroscope. Background Technology

[0002] Laser gyroscopes, as high-precision angle rotation measurement devices, play an important role in aviation, aerospace, and marine fields. Essentially, a laser gyroscope is a gas laser, and its principle is based on the Sagnac effect, converting angular rotation into beat frequency signal output.

[0003] The trace amounts of residual gas released inside the cavity of a laser gyroscope during use and storage affect its performance and, more seriously, its lifespan. The residual gas problem is one of the key issues hindering the lifespan and reliability of laser gyroscopes. Generally, a getter is placed in an appropriate location within the laser gyroscope cavity to adsorb these residual gases. Currently, most laser gyroscopes in China use barium-aluminum vaporization getters. During activation, the getter is heated to induce a displacement reaction, forming a barium film. The barium then chemically reacts with stray gases in the laser gyroscope, thereby absorbing the stray gases.

[0004] Because barium reacts with impurities to form barium compounds, these compounds can detach from the inner surface of the gyroscope cavity during vibration, contaminating the reflector and causing a decrease in reflectivity. This, in turn, leads to a decrease in output power, and in severe cases, the laser gyroscope may have no power output. Therefore, the evaporable getter in laser gyroscopes is typically placed in a specially designed getter orifice as a component. The evaporable getter is placed upside down in a tray, with a cross-shaped spring pressing it down. A light-sensitive adhesive plug is placed on the cross-shaped spring. When the getter evaporates, a barium film covers the plug. After the barium film absorbs impurities and turns into powder, the pressure of the cross-shaped spring keeps the tray tightly against the bottom of the getter orifice, preventing the powder from entering the inner hole of the laser gyroscope.

[0005] Because the temperature of the getter can reach over 1000℃ when it evaporates, the getter is usually placed upside down in the tray to avoid the cross spring breaking or the cross spring clamping force disappearing due to the excessively high temperature of the barium film after the getter evaporates. However, placing the getter upside down in the tray will make it difficult for the getter to evaporate, and some barium film cannot be sprayed out and will be heated and reacted. The actual amount of barium obtained after evaporation is significantly different from the design amount, and the design requirements cannot be met. Summary of the Invention

[0006] This invention addresses the technical problems existing in the prior art by providing a laser gyroscope getter assembly and a laser gyroscope.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A laser gyroscope getter assembly includes: a tray, a getter, a sheet, and a clamping member. The getter is placed in the tray and has a ring-shaped structure, with the outer side of the getter being higher than its inner side. The sheet covers the getter, and the clamping member presses firmly onto the sheet.

[0008] The beneficial effects of this invention are: during use, the sheet, the tray, and the getter form a closed space, and the height of the outer side of the getter is higher than the height of its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0009] The present invention has a simple structure and reasonable design. The getter is placed facing upwards, so that it can be sprayed directly after activation, and the barium content of the getter can meet the design requirements. At the same time, the getter is not sprayed directly onto the tray when activated, so the tray temperature is low and there is no risk of the tray melting.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the getter includes an annular groove and getter powder, the annular groove is placed inside the tray, and the height of its outer side is higher than the height of its inner side; the getter powder is placed inside the annular groove.

[0012] The beneficial effect of adopting the above-mentioned further solution is that during use, the sheet, the tray, and the getter form a closed space, and the height of the outer side of the annular groove is higher than the height of its inner side, ensuring that the getter powder can be smoothly sprayed from the area between the inner side of the annular groove and the sheet after activation, so as to meet the actual needs. The design of the annular groove in this scheme is reasonable, which facilitates the smooth spraying of the getter powder after activation.

[0013] Furthermore, the height of the outer side of the annular groove is 1-2 times its inner height.

[0014] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The height of the outer side of the annular groove is 1-2 times the height of the inner side, ensuring that there is a gap between the inner side of the annular groove and the thin sheet, so as to ensure that the getter powder can be smoothly sprayed out from the area between the inner side of the annular groove and the thin sheet after activation, in order to meet the actual needs. In addition, by raising the outer ring of the getter and placing the thin sheet directly on the outer ring of the getter, the barium film will not evaporate onto the side wall of the tray and the side wall of the getter hole after the getter is activated. The side wall of the getter hole has a low temperature and no risk of cracking.

[0015] Furthermore, the tray is a circular disc, and the sheet is a circular sheet.

[0016] The advantages of adopting the above-mentioned further solution are that the structure is simple and the shape of the tray and the sheet are adapted to form a sealed area to contain the getter.

[0017] Furthermore, the sheet is a microcrystalline sheet.

[0018] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. By adding a microcrystalline sheet between the getter and the clamping part, the barium film will not cover the clamping part when the getter is activated. The clamping part has no risk of breaking or losing clamping force during the activation process, which greatly improves the production qualification rate.

[0019] Furthermore, the clamping element is a cross spring.

[0020] The advantages of adopting the above-mentioned further solution are that the structure is simple, the use of a cross spring as the clamping component is more reasonable, the cross spring always has a clamping force, and the thin sheet is kept pressed.

[0021] The present invention also relates to a laser gyroscope, including the laser gyroscope getter assembly as described above.

[0022] The beneficial effect of adopting the above-mentioned further solution is that during use, the sheet, tray and getter form a closed space, and the height of the outer side of the getter is higher than the height of its inner side, ensuring that the getter can be smoothly sprayed after activation to meet actual needs. In addition, the present invention has a simple structure and reasonable design. The getter is placed facing upwards, so that the getter is sprayed directly after activation, and the barium content of the getter can meet the design requirements. At the same time, the getter is not sprayed directly onto the tray when activated, so the tray temperature is low and there is no risk of the tray melting.

[0023] Furthermore, it also includes a workpiece and a plug, wherein the workpiece has a cavity with an open top, and a tray, a sheet and a clamping element are respectively located in the cavity; the plug covers the top of the cavity.

[0024] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. By using a plug to cover the top of the cavity, the cavity forms a sealed space so that subsequent vacuuming operations can be carried out.

[0025] Furthermore, the plug is a photoresist plug.

[0026] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The light-blocking film is a rubber component used to block or seal the light path and prevent light leakage.

[0027] Furthermore, it also includes a magnetic induction coil, which is sleeved outside the plug.

[0028] The beneficial effect of adopting the above-mentioned further solution is that during the operation, the magnetic coil can be energized to activate the getter in order to obtain a barium film. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the getter assembly in this invention; Figure 2 This is a cross-sectional view of the getter assembly in this invention; Figure 3 This is an assembly diagram of the getter and the tray in this invention; Figure 4 This is a schematic diagram of the getter in this invention; Figure 5 This is a schematic diagram of the tray structure in this invention; Figure 6 This is a schematic diagram of the overall structure of the laser gyroscope in this invention; Figure 7 This is a cross-sectional view of the laser gyroscope in this invention; Figure 8 This is a partial structural diagram of the laser gyroscope in this invention; Figure 9 This is an overall assembly diagram of the workpiece and getter assembly in this invention; Figure 10 This is a partial assembly diagram of the workpiece and getter assembly in this invention; Figure 11 This is an assembly diagram of the workpiece and the pallet in this invention; Figure 12 This is a schematic diagram of the workpiece structure in this invention.

[0030] The attached diagram lists the components represented by each number as follows: 1. Tray; 2. Ring groove; 3. Getter powder; 4. Microcrystalline sheet; 5. Cross spring; 6. Workpiece; 7. Cavity; 8. Optical adhesive plug; 9. Magnetic coil; 10. Vacuum hole. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0034] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0035] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0036] Example 1 like Figures 1 to 5 As shown, this embodiment provides a laser gyroscope getter assembly, including: a tray 1, a getter, a sheet, and a clamping member. The getter is placed in the tray 1 and has a ring-shaped structure, with the outer side of the getter being higher than its inner side. The sheet covers the getter, and the clamping member presses firmly onto the sheet.

[0037] During use, the sheet, tray 1, and getter form a closed space, with the outer side of the getter being higher than its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0038] This embodiment has a simple structure and reasonable design. The getter is placed facing upwards, so that it can be sprayed directly after activation, and the barium content of the getter can meet the design requirements. At the same time, the getter is not sprayed directly onto the tray when activated, so the tray temperature is low and there is no risk of the tray melting.

[0039] Example 2 Based on Example 1, in this example, the getter includes an annular groove 2 and getter powder 3. The annular groove 2 is placed inside the tray 1, with its outer side being higher than its inner side; the getter powder 3 is placed inside the annular groove 2.

[0040] During use, the sheet, tray 1, and getter form a closed space, and the height of the outer side of the annular groove 2 is higher than the height of its inner side, ensuring that the getter powder can be smoothly sprayed out from the area between the inner side of the annular groove 2 and the sheet after activation, so as to meet the actual needs. The design of the annular groove 2 in this scheme is reasonable, which facilitates the smooth spraying of the getter powder after activation.

[0041] Preferably, in this embodiment, the getter powder is placed in the annular groove 2 to form a ring.

[0042] In addition, the height of the aforementioned getter powder 3 is flush with the inner side of the annular groove 2.

[0043] Preferably, in this embodiment, the composition of the getter powder 3 is a mixture of barium aluminum oxide (BaAl4) and nickel, and the mass ratio of barium aluminum oxide (BaAl4) to nickel is 1:1.

[0044] Alternatively, the aforementioned annular groove 2 can also adopt other suitable geometric shapes, such as a rectangular cross-section.

[0045] Example 3 Based on Example 2, in this example, the height of the outer side of the annular groove 2 is 1-2 times its inner height.

[0046] The scheme has a simple structure and reasonable design. The height of the outer side of the annular groove 2 is 1-2 times the height of the inner side, ensuring that there is a gap between the inner side of the annular groove 2 and the thin sheet. This ensures that the getter powder can be smoothly sprayed out from the area between the inner side of the annular groove 2 and the thin sheet after activation, so as to meet the actual needs. In addition, by raising the outer ring of the getter and placing the thin sheet directly on the outer ring of the getter, the barium film will not evaporate to the side wall of tray 1 and the side wall of the getter hole after the getter is activated. The side wall of the getter hole has a low temperature and no risk of cracking.

[0047] Based on the above scheme, the relationship between the outer height of the annular groove 2 and its inner height is as follows: the outer height of the annular groove 2 should be higher than its inner height, so as to ensure that there is a certain gap between the inner side of the annular groove 2 and the thin sheet for the getter to be sprayed out after activation.

[0048] During use, the sheet, tray 1, and getter form a closed space, with the outer side of the getter being higher than its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0049] Example 4 Based on any one of Embodiments 2 to 3, in this embodiment, the tray 1 is a circular tray and the thin sheet is a circular sheet.

[0050] The design is simple in structure, with tray 1 and the sheet being adapted to form a sealed area to contain the getter.

[0051] Based on the above scheme, during assembly, the outer side of the annular groove 2 fits against the inner wall of the tray 1, and the top of the outer side of the annular groove 2 extends to the outside of the tray 1.

[0052] In addition, the aforementioned sheet covers the outside of the annular groove 2, and the edge of its lower surface is in contact with the top of the outer side of the annular groove 2.

[0053] Alternatively, the tray 1 and the sheet described above can also adopt other suitable geometries, such as rectangular trays and rectangular plates.

[0054] During use, the sheet, tray 1, and getter form a closed space, with the outer side of the getter being higher than its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0055] Example 5 Based on the above embodiments, in this embodiment, the sheet is a microcrystalline sheet 4.

[0056] The solution has a simple structure and reasonable design. By adding a microcrystalline sheet 4 between the getter and the clamping component, the barium film will not cover the clamping component when the getter is activated. The clamping component is free from the risk of breakage or loss of clamping force during the activation process, which greatly improves the production qualification rate.

[0057] During use, the microcrystalline sheet 4, the tray 1, and the getter form a closed space, with the height of the outer side of the getter being higher than the height of its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0058] Example 6 Based on the above embodiments, in this embodiment, the clamping element is a cross spring 5.

[0059] The scheme has a simple structure, and the use of a cross spring 5 as the clamping component is more reasonable. The cross spring 5 always has a clamping force to keep the thin sheet clamped.

[0060] During use, the microcrystalline sheet 4, tray 1, and getter form a closed space, which is pressed together by the cross spring 5. The height of the outer side of the getter is higher than the height of its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0061] Example 7 Based on the above embodiments, such as Figures 6 to 12 As shown, this embodiment also relates to a laser gyroscope, including the laser gyroscope getter assembly as described above.

[0062] During use, the sheet, tray, and getter form a closed space, with the outer side of the getter being higher than its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs. In addition, this embodiment has a simple structure and reasonable design. The getter is placed facing upwards, so that it can be sprayed directly after activation, and the amount of barium in the getter can meet the design requirements. At the same time, the getter is not sprayed directly onto the tray 1 when activated, and the temperature of the tray 1 is low, so there is no risk of the tray 1 melting.

[0063] Example 8 Based on embodiment 7, this embodiment also includes a workpiece 6 and a plug. The workpiece 6 has a cavity 7 with an open top, and the tray 1, the thin sheet and the clamping member are located in the cavity 7 respectively; the plug covers the top of the cavity 7.

[0064] The scheme has a simple structure and reasonable design. It uses a plug to cover the top of the cavity 7, so that the cavity 7 forms a sealed space for subsequent vacuuming operations.

[0065] Preferably, in this embodiment, the bottom of the cavity 7 is provided with at least one vacuum hole 10, which is connected to a vacuum stage through a pipeline, and the vacuum stage is used to perform vacuum treatment on the cavity 7.

[0066] In addition, two vacuum holes 10 are provided at intervals at the bottom of the cavity 7.

[0067] During use, the microcrystalline sheet 4, tray 1, and getter form a closed space, which is pressed together by the cross spring 5. The height of the outer side of the getter is higher than the height of its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0068] Example 9 Based on Example 8, in this example, the plug is a photoresist plug 8.

[0069] The solution has a simple structure and reasonable design. The light-blocking plate 8 is a rubber component used to block or seal the light path and prevent light leakage.

[0070] During use, the microcrystalline sheet 4, tray 1, and getter form a closed space, which is pressed together by the cross spring 5. The height of the outer side of the getter is higher than the height of its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0071] Example 10 Based on any one of Embodiments 8 to 9, this embodiment further includes a magnetic induction coil 9, which is sleeved outside the plug.

[0072] During use, the microcrystalline sheet 4, tray 1, and getter form a closed space, which is pressed together by the cross spring 5. The height of the outer side of the getter is higher than the height of its inner side, ensuring that the getter can be smoothly sprayed out after activation to meet actual needs.

[0073] In addition, during the operation, the magnetic coil 9 can activate the getter after being energized in order to obtain a barium film.

[0074] Preferably, in this embodiment, the magnetic induction coil 9 has a ring-shaped structure, which is reasonably designed and easy to be sleeved on the outside of the optical adhesive plug 8, with its inner wall fitting against the edge of the optical adhesive plug 8.

[0075] This invention provides a laser gyroscope getter assembly and a laser gyroscope, the operating principle of which is as follows: (1) Remake the getter ring mold so that the height of the outer ring of the getter ring is increased to twice the original height. Add getter powder into the getter ring so that its height is level with the height of the inner ring.

[0076] (2) Prepare microcrystalline sheets with a diameter slightly smaller than the getter pore diameter and larger than the getter outer diameter, and a thickness of 0.2 mm.

[0077] (3) Deepen the getter hole by adding 0.2 mm to the height of the inner ring of the getter, so that the compression of the cross spring remains unchanged after the light adhesive is plugged.

[0078] (4) Place the tray into the getter hole with the getter ring facing up in the tray. Press a microcrystalline sheet on the outer ring of the getter, then press the cross spring on the microcrystalline sheet, and finally put a light adhesive plug on the cross spring.

[0079] (5) After the vacuum stage on the laser gyroscope cavity is evacuated, the getter magnetic induction coil is placed on the plug plate, the magnetic induction coil is in close contact with the optical adhesive surface, the magnetic induction coil is energized, and the getter evaporates and is kept for a period of time, and the getter activation is completed.

[0080] This invention provides a laser gyroscope getter assembly and a laser gyroscope, the advantages of which are as follows: (1) In this invention, the getter ring is placed in the tray with the getter ring facing upward. When the getter is activated, it is sprayed directly. The amount of barium in the getter can meet the design requirements. At the same time, when the getter is activated, it is not sprayed onto the tray. The tray temperature is low and there is no risk of the tray melting.

[0081] (2) The present invention adds a microcrystalline sheet between the getter and the cross spring, so that when the getter is activated, the barium film will not cover the cross spring. The cross spring has no risk of breaking or losing its clamping force during the activation process, which greatly improves the production qualification rate.

[0082] (3) The present invention raises the outer ring of the getter and the microcrystalline sheet directly presses against the outer ring of the getter, so that the barium film will not evaporate to the side wall of the tray and the side wall of the getter hole after the getter is activated. The side wall of the getter hole has a low temperature and no risk of cracking.

[0083] This invention designs a laser gyroscope getter assembly and a laser gyroscope. The getter ring is placed in a tray with the getter ring facing upwards. The height of the outer ring of the getter ring is increased to twice the original height (the height of the inner ring remains unchanged). A microcrystalline sheet is pressed on the outer ring of the getter ring, and a cross spring is then pressed on the microcrystalline sheet. A photoresist plug is then placed on top of the cross spring.

[0084] The purpose of this invention is to design a new getter assembly that ensures the amount of barium obtained after the getter evaporates meets the design requirements, while also preventing the cross spring from breaking and maintaining the clamping force during evaporation.

[0085] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of the invention is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A laser gyroscope getter assembly, characterized in that, include: The tray (1), getter, sheet and clamping member are provided, wherein the getter is placed in the tray (1) in a ring structure and the height of the outer side of the getter is higher than the height of the inner side; the sheet covers the getter and the clamping member is pressed tightly on the sheet.

2. The laser gyroscope getter assembly according to claim 1, characterized in that, The getter includes an annular groove (2) and getter powder (3). The annular groove (2) is placed inside the tray (1), with its outer side being higher than its inner side. The getter powder (3) is placed inside the annular groove (2).

3. The laser gyroscope getter assembly according to claim 2, characterized in that, The height of the outer side of the annular groove (2) is 1-2 times the height of its inner side.

4. The laser gyroscope getter assembly according to claim 2, characterized in that, The tray (1) is a circular tray, and the thin sheet is a circular sheet.

5. The laser gyroscope getter assembly according to any one of claims 1-4, characterized in that, The thin sheet is a microcrystalline thin sheet (4).

6. The laser gyroscope getter assembly according to any one of claims 1-4, characterized in that, The clamping element is a cross spring (5).

7. A laser gyroscope, characterized in that, Includes the laser gyroscope getter assembly as described in any one of claims 1-6.

8. The laser gyroscope according to claim 7, characterized in that, It also includes a workpiece (6) and a plug, wherein the workpiece (6) has a cavity (7) with an open top, and the tray (1), the sheet and the clamping member are located in the cavity (7); the plug covers the top of the cavity (7).

9. The laser gyroscope according to claim 8, characterized in that, The plug is a light adhesive plug (8).

10. The laser gyroscope according to claim 8, characterized in that, It also includes a magnetic induction coil (9), which is sleeved outside the plug.

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