A conformal device

Abstract

The present invention provides a conformal device. By adding a limiting protrusion with a stress relief structure and a filling medium with fluidity and affinity between the optical element and the mounting frame, while eliminating the gap between the optical element and the mounting frame, the ability of the conformal device to adapt to harsh working conditions is improved. Moreover, the limiting protrusion with a stress relief structure and the filling medium with fluidity before solidification and stabilization can both adapt to various errors of each component, including surface microdefects and dimensional errors. Therefore, the present invention can also reduce the precision requirements for components, thereby reducing the processing difficulty. In particular, through the cooperation of the material properties and spatial dimensions between the corresponding components, a thermal stress elimination property is generated, reducing the influence of temperature changes on the performance of the optical element. The present invention overcomes the problems of existing conformal devices, such as the existence of gaps and unevenness on the conformal surface, difficulty in adapting to harsh working conditions, and high processing precision requirements and large processing difficulty.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical conformal devices, and particularly relates to a conformal device. Background Art

[0002] For some optical instruments applied to high-speed fluids, they often need to meet certain aerodynamic shapes. For example, a conformal nose cone for high-speed flight needs to have a surface of a specific shape as a whole in order to achieve the purpose of reducing drag, and this surface must be flat and smooth. In order to achieve optical functions such as observation, optical elements such as lenses must be installed on the nose cone. Therefore, how to obtain a smooth and flat conformal surface among optical elements with different materials and the nose cone mounting frame has become a difficult problem. In order to achieve the smoothness of the conformal surface, the existing method is to improve the accuracy of the respective positioning and mounting surfaces of the optical element and the mounting frame at the same time, so as to minimize the gap generated at the mounting and combining part of the two, so as to achieve the smoothness effect as much as possible. However, since the optical elements applied to the conformal device are all embedded in the mounting frame for the purpose of achieving conformal purposes, the embedding will make the mounting surface of the mounting frame have closure, and the closure will limit the processing means, so it is very difficult to machine a mounting surface with very high accuracy. At the same time, since most of the optical elements applied to the conformal field are non-conventional circular and have a relatively thin thickness, and due to the hard and brittle characteristics of their materials, it is also very difficult to machine a very high-precision mounting and positioning surface for them. Even if high-precision mounting and positioning surfaces can be machined on the mounting frame and the optical element, a certain gap must be reserved for installation needs, so it is also very difficult to completely achieve the smoothness effect of the conformal surface. In the traditional conformal device, even if an adhesive is used, its purpose is to fix the optical element, and it is very difficult for the adhesive to cover the entire gap, especially at the junction of the conformal surface and the gap, so it does not have the function of making the conformal surface smooth. At the same time, because the conformal device applied to high-speed fluids will experience sharp changes in pressure and temperature as well as harsh mechanical environments such as shock and vibration. For example, the pressure on the outer surface of a high-speed flight conformal nose cone will decrease, and at the same time, its outer surface temperature will rise due to friction, and it will also bear shock and vibration due to high-speed flight. Most of the existing conformal devices can only meet the accuracy requirements in a relatively stable environment, and it is very difficult to ensure the stability of the device's form and position accuracy when the actual working conditions are harsh. Therefore, there is currently a lack of an optical conformal device that can truly make the conformal surface smooth, while ensuring that the device can adapt to harsh working environments and has low processing requirements. Summary of the Invention

[0003] In order to specifically overcome the problems existing in the conformal surface of the existing conformal device, such as gaps, unevenness, difficulty in adapting to harsh working conditions, high requirements for machining accuracy and large machining difficulty, etc., the present invention proposes a conformal device that can eliminate the gap between the optical element and the mounting frame, can reduce the influence of factors such as temperature and pressure changes, impact and vibration on the device accuracy, and can reduce the requirements for the machining accuracy of each component.

[0004] The present invention is realized by adopting the following technical solutions:

[0005] A conformal device, characterized in that it includes a mounting frame, an optical element, a limiting protrusion, and a filling medium; there are limiting protrusions on the frame mounting surface of the mounting frame, and the optical element is restricted by the limiting protrusions to form relative positioning with the mounting frame within the mounting space formed by the frame mounting surface.

[0006] The limiting protrusion does not protrude from the mounting frame on the conformal surface side and has a corresponding distance from the conformal surface. The filling medium has a certain fluidity or equivalent elasticity before curing and stabilization. The filling medium fills the gap between the optical element and the mounting frame, and the optical element, the mounting frame, and the filling medium jointly form a conformal surface; the fact that the limiting protrusion does not protrude from the mounting frame on the conformal surface side enables the filling medium to completely cover the mounting surface of the mounting frame and the corresponding positioning surface of the optical element on the conformal surface side, thereby covering the intersection of the conformal surface and the gap, and further completely eliminating the gap to make the conformal surface smooth and flat. And having a corresponding distance from the conformal surface can ensure the firm reliability of the filling medium. The filling medium has a certain fluidity or equivalent elasticity before curing and stabilization, so as to adapt to any form of the optical element and the mounting frame and various errors including surface roughness, local defects, and dimensional errors, and make the combination of the filling medium with the optical element and the mounting frame closer, so as to better fill the voids.

[0007] Furthermore, the limiting protrusion has a stress-relieving structure. The stress-relieving structure has multi-directionality, and at least one stress-relieving direction is the same as the limiting direction of the limiting protrusion on the optical element. In this way, it can not only allow certain machining errors to exist in multiple components such as the optical element, the limiting protrusion, and the mounting frame during the installation of the optical element, thereby reducing the machining difficulty, but also allow a certain degree of deformation in multiple directions, and further better reduce the influence of stress deformation caused by harsh working conditions.

[0008] Further, the limiting protrusion can be an integral structure with the mounting frame or a structure installed subsequently; when the limiting protrusion is a structure installed subsequently, the material of the limiting protrusion can be different from that of the mounting frame. The separate structure can make the limiting protrusion better processed, and the different materials can increase the diversity of the properties of the limiting protrusion itself, thereby improving the flexibility in functions such as stress elimination.

[0009] Further, multiple limiting protrusions can be arranged horizontally or vertically on the frame mounting surface, so as to adjust the shape, size and stiffness of a single limiting protrusion according to actual needs while performing targeted positioning and constraint on the optical element, so as to adapt to the mounting frames and optical elements of different sizes and shapes, and reduce the processing difficulty of the limiting protrusion. At the same time, the limiting protrusion can be used as a strengthening structure to strengthen the filling medium, and multiple limiting protrusions can better strengthen the filling medium.

[0010] Further, by arranging the corresponding limiting protrusions in the horizontal, vertical and other directions on the frame mounting surface, or through the corresponding shape matching between the limiting protrusion and the optical element, the limiting protrusion can limit the multi-directional positions of the optical element, including the horizontal and vertical directions, at the same time.

[0011] Further, the material properties and spatial dimensions of the optical element, the mounting frame and the filling medium cooperate with each other to form a thermal stress elimination property, that is, to realize the mutual adaptation of the thermal deformation amounts of the optical element, the mounting frame and the filling medium in the required thermal stress elimination direction, so as to reduce or even eliminate the influence of temperature change on the performance of the conformal device.

[0012] Further, the filling medium is composed of one or more materials, which have an affinity for the mounting frame and the optical element in contact with itself. Among them, multiple materials can improve the flexibility of the filling medium material selection and the diversity of comprehensive properties, and the affinity can enable the filling medium to better adapt to various errors of the optical element and the mounting frame, including surface roughness, local defects and dimensional errors, and make the combination closer, so as to better fill the voids, and further make the processing more reliable while making the conformal surface smoother, more stable.

[0013] Furthermore, there are positioning extension blocks on the frame mounting surface. The positioning extension blocks do not protrude beyond the mounting frame on the conformal surface side and are at a corresponding distance from the conformal surface, which is used to limit the position of the optical element relative to the mounting frame. The position limiting direction is at least perpendicular to the position limiting direction of the limiting protrusion on the optical element. The positioning extension blocks do not have a stress relief structure, and higher stiffness can provide stronger support for the optical element. The fact that they do not protrude beyond the mounting frame is also to ensure that the filling medium completely covers the mounting surface of the mounting frame and the corresponding positioning surface of the optical element on the conformal surface side, thereby eliminating the gap. The corresponding distance from the conformal surface can ensure the firm reliability of the filling medium, and the perpendicular components can enable the positioning extension blocks and the limiting protrusions to jointly determine the position of the optical element.

[0014] Furthermore, in order not to let the positioning extension blocks without stress relief structure affect the thermal stress relief function of the conformal device and its adaptability to pressure changes, shock vibrations, etc., the positioning extension blocks only contact the optical element in their corresponding position limiting direction, and do not contact the optical element in other directions, so as to ensure that within the designed temperature change range, the positioning extension blocks will not limit the normal deformation and displacement of the optical element due to factors such as thermal deformation, pressure changes, and shock vibrations.

[0015] Furthermore, there is a mesh reinforcement structure in the filling medium. The mesh reinforcement structure is at a corresponding distance from the conformal surface. The mesh reinforcement structure can make the filling medium more firm and also increase the overall toughness of the filling medium. Keeping a corresponding distance from the conformal surface is to prevent the mesh reinforcement structure from exposing the conformal surface and damaging the smoothness of the conformal surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] A conformal device adds a limit protrusion with a stress relief structure and a filling medium with fluidity and affinity between the optical element and the mounting positioning surface of the mounting frame. While eliminating the gap between the optical element and the mounting frame, it also improves the ability of the conformal device to adapt to harsh working conditions. The limit protrusion with a stress relief structure can allow for certain machining errors between the optical element and the mounting frame. Before solidification and stabilization, the filling medium with fluidity and affinity can also adapt to any shape of the components and various machining errors including dimensional errors and surface micro-defects. Therefore, the present invention can also reduce the precision requirements for the components and thus reduce the processing difficulty. In particular, through the cooperation of the material properties and spatial dimensions of the corresponding components such as the optical element, the mounting frame, and the filling medium, a thermal stress relief property is generated, reducing the influence of temperature changes on the performance of the optical element. The present invention overcomes the problems of the existing conformal device such as gaps and unevenness on the conformal surface, difficulty in adapting to harsh working conditions, and high processing precision requirements and large processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the conformal device in the present invention;

[0019] Figure 2 It is a schematic structural diagram of the mounting frame and the optical element in the present invention;

[0020] Figure 3 It is a schematic structural diagram of the limit protrusion and the optical element after installation in the present invention;

[0021] Figure 4 It is a schematic diagram of the stress relief structure of the limit protrusion in the present invention;

[0022] Figure 5 It is a schematic structural diagram of the positioning extension block and the optical element after installation in the present invention;

[0023] Figure 6 It is a schematic structural diagram of the multi-layer limit protrusion and the optical element after installation in the present invention;

[0024] Figure 7 It is a schematic structural diagram of the positioning of a specific-shaped optical element in the present invention;

[0025] Figure 8 It is a schematic structural diagram of the specific-shaped limit protrusion positioning the optical element in the present invention;

[0026] Figure 9 It is a schematic structural diagram of the non-closed conformal device in the present invention.

[0027] LEGEND DESCRIPTION: 1: Mounting frame, 2: Optical element, 3: Frame mounting surface, 4: Element positioning surface, 5: Limit protrusion, 6: Filling medium, 7: Positioning extension block.

[0028] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0029] Next, the technical solutions of the present invention will be clearly and completely described with reference to the accompanying drawings of the present invention. Obviously, the description including the accompanying drawings is only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, a physical connection or a wireless communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0034] As shown in the appended Figures 1-9As shown, in order to clearly demonstrate the principle and working process of the present invention, this embodiment mainly provides a more typical implementation scheme through a pipeline-type optical conformal device, but the following case is only a typical embodiment of the present invention and cannot represent all the solutions of the present invention.

[0035] The pipeline optical conformal device as shown in the figure can be used to observe the flow state of high-speed fluid inside the pipeline. In order not to destroy the flow channel and introduce errors, it is necessary to achieve the observation function while not destroying the original shape of the pipeline. Therefore, the inner surface of the optical element 2 must be kept in the same shape as the inner surface of the pipeline, that is, the mounting frame 1, to achieve conformal, and no local bumps and gaps are allowed, otherwise it will also affect the high-speed fluid. Therefore, the conformal device proposed in the present invention can be used to achieve a smooth and gapless installation part of the optical element 2.

[0036] like Figure 2 As shown, the optical element 2 can be regarded as a lens, which is non-circular and thin, so it is difficult to machine high-precision positioning surfaces around it; and because the optical element 2 is embedded in the pipe as the mounting frame 1, the frame mounting surface 3 of the mounting frame 1 for mounting the optical element 2 is a closed rectangle, which is also difficult to be machined with high precision; in addition, in order to facilitate installation, the rectangular installation space formed by the frame mounting surface 3 should be slightly larger than the overall size of the optical element 2, which causes the existence of an installation gap; and even if an adhesive is used in the conventional solution, it is mainly to fix the optical element 2 on the mounting frame 1, and it does not have the function of completely filling the gap. The above factors lead to the inevitable gap at the junction of the element positioning surface 4 and the frame mounting surface 3 in the traditional conformal device.

[0037] At the same time, the thermal expansion coefficient of the glass material of the optical element 2 is often quite different from that of the metal material of the mounting frame 1. This means that even if the gap can be eliminated as much as possible through the close fit between the high-precision element positioning surface 4 and the frame mounting surface 3, when the temperature in the working environment changes, the mounting frame 1 will squeeze or peel off the optical element 2 due to the different thermal deformation of the optical element 2, which may cause deformation or even damage to the optical element 2 or debonding and pulling. When the pressure changes due to the high-speed flow of the fluid, if the optical element 2 and the mounting frame 1 are too tightly matched to eliminate the gap, the performance of the conformal device will also be affected by the deformation; at the same time, the conformal device used for high-speed fluids is prone to resonance due to the high frequency of environmental vibration, and the impact caused by the resonance will also affect the performance of the traditional non-buffered conformal device.

[0038] Therefore, it is difficult for traditional shape-keeping devices to overcome the above-mentioned contradictory problems, and the shape-keeping device proposed in the present invention can provide a new idea for solving the above-mentioned problems.

[0039] As shown in the legend, a pipeline - type optical conformal device is used to observe the flow pattern of high - speed fluids inside the pipeline. Therefore, the inner wall of the pipeline is a conformal surface. It mainly includes components such as an installation frame 1, an optical element 2, a limiting protrusion 5, a filling medium 6, etc. Among them, there is a limiting protrusion 5 on the frame installation surface 3 of the installation frame 1, and the element positioning surface 4 of the optical element 2 is restricted by the limiting protrusion 5 to form relative positioning with the installation frame 1 within the installation space formed by the frame installation surface 3.

[0040] As Figures 3-5 shown, the limiting protrusion 5 does not protrude from the installation frame 1 on the conformal surface side, that is, it does not protrude from the inner wall of the pipeline, and there is a corresponding distance from the inner wall of the pipeline. This corresponding distance should ensure that the filling medium 6 has a certain thickness so that it is firm and stable. The filling medium 6 fills the gap between the optical element 2 and the installation frame 1, and the optical element 2, the installation frame 1, and the filling medium 6 together form a flat, smooth, and optically - performance - compliant conformal surface. The fact that the above - mentioned limiting protrusion 5 does not protrude from the installation frame 1 on the conformal surface side enables the filling medium 6 to completely cover the installation surface of the installation frame 1 and the corresponding positioning surface of the optical element 2 on the conformal surface side, especially covering the intersection of the conformal surface and the gap, thereby completely eliminating the gap and making the conformal surface smooth and flat. One feasible material selection scheme for the filling medium 6 is improved epoxy resin.

[0041] As Figure 4 shown, the limiting protrusion 5 has a stress - relieving structure. The stress - relieving structure weakens the local stiffness of the limiting protrusion 5, making the stress - relieving direction of the stress - relieving structure multi - directional, that is, it can be compressed, stretched, and twisted in multiple directions, and at least one of its stress - relieving directions is the same as the limiting direction of the limiting protrusion 5 on the optical element 2, that is, it shows weaker stiffness in this direction, so that it can be compressed or stretched without generating excessive stress on the optical element 2. In this way, it can not only allow a certain processing error among multiple parts such as the optical element 2, the limiting protrusion 5, and the installation frame 1 when the optical element 2 is installed, but also allow a certain degree of elastic deformation and elastic displacement of the optical element 2 in multiple directions, thereby better reducing the negative impact of stress deformation caused by harsh working conditions.

[0042] As Figure 4As shown, the limiting protrusion 5 can be an integral structure with the mounting frame 1, or a structure to be installed later. The limiting protrusion 5 and the mounting frame 1 are an integral structure, which can reduce the number of parts and the number of installation steps. When the limiting protrusion 5 is a subsequent installation structure, the material of the limiting protrusion 5 can be different from the material of the installation frame 1. The separate structure can also make the limiting protrusion 5 better processed. The difference in materials can increase the diversity of the properties of the limiting protrusion 5 itself, thereby improving its flexibility in stress elimination and other functions. For example, a material with the same or similar thermal expansion coefficient as the filling medium 6 used can be selected as the limiting protrusion 5, so that the negative impact of the thermal deformation amount not being able to coordinate with the thermal deformation amount of the optical element 2 and the installation frame 1 due to the addition of the limiting protrusion 5 to reduce the local material of the filling medium 6 can be eliminated or reduced; it is also possible to select a material with the same or similar stiffness as the filling medium 6 after stabilization as the limiting protrusion 5, so that when deformation is caused by pressure or impact vibration, stress concentration will not occur due to the increase in local stiffness; or select a material with greater stiffness to adjust the stiffness of the filling medium 6; and flexible selection of materials can also reasonably control the ratio of the structural stiffness and size volume of the limiting protrusion 5 itself, thereby reducing the negative impact on the overall properties of the filling medium 6.

[0043] like Figure 4 and Figure 6 As shown, multiple limiting protrusions 5 can be arranged horizontally or vertically on the frame mounting surface 3, so that the rigidity of a single limiting protrusion 5 can be adjusted while performing targeted positioning constraints on the optical element 2 according to actual needs, so as to adapt to mounting frames 1 and optical elements 2 of different sizes and shapes, and reduce the difficulty of processing the limiting protrusion 5. At the same time, the limiting protrusion 5 can be used as a reinforcing structure to strengthen the filling medium 6, and multiple limiting protrusions 5 can better strengthen the filling medium 6. For example Figure 6 As shown in the figure, after the optical element 2 is processed into a specific shape, the optical element 2 can be constrained in the horizontal and vertical positions by cooperating with the limiting protrusions 5; at the same time, the limiting protrusions 5 can be used as reinforcing ribs to make the filling medium 6 more stable and firm, and can increase the strength of the filling medium 6 while making the filling medium 6 less likely to loosen, and can also adjust the rigidity of the filling medium 6. Because the pipeline optical conformal device is used in high-speed fluids, changes in pressure will cause vertical pulling on the optical element 2, so the optical element 2 must be firmly fixed, and the filling medium 6 and the limiting protrusions 5 are mutually reinforced to ensure that the optical element 2 is reliably fixed on the mounting frame 1, and will not cause displacement exceeding the tolerance range due to pressure changes, thereby losing position accuracy.

[0044] like Figure 7 As shown in FIG. 1 , the optical element 2 is machined with a step, and the limiting protrusion 5 can simultaneously limit the horizontal and vertical positions of the optical element 2. Figure 8In the middle, a step is machined on the limit projection 5, which can also limit the position of the optical element 2 in the horizontal and vertical directions. Considering the hard and brittle characteristics of the material of the optical element 2 and the limitations such as the size requirements of its optical surface, machining the optical element 2 into an unconventional shape as shown in Figure 7 will increase the machining difficulty to a certain extent and waste a part of the size of the optical element 2. Therefore, when the requirements are met, the limit projection 5 can be machined into a specific shape to realize the multi-directional position limitation of the optical element 2 including the horizontal and vertical directions. In short, the shapes and numbers of the optical element 2 and the limit projection 5 can be flexibly set according to the actual situations such as the position and shape of the conformal surface and the material properties of each component. At the same time, the stress-relieving structure of the limit projection 5 is not limited to the structure shown in the figure. For example, the limit projection 5 can also be designed in the shape of a spring. In short, as long as it has a stress-relieving structure and can play a role in limiting the position of the optical element 2, it is acceptable.

[0045] In order to reduce the influence of temperature change on the performance of the conformal device during use, through the mutual cooperation between the material properties and spatial dimensions of the optical element 2, the mounting frame 1, and the filling medium 6, a thermal stress elimination property is generated, so that the influence of temperature change on the performance of the conformal device can be reduced. Specifically, taking the pipe-type conformal device in the figure as an example and taking the thermal stress elimination in the axial direction of the mounting frame 1 as an example, in this direction, due to the different thermal expansion coefficients of the materials of the optical element 2 and the mounting frame 1, generally speaking, the thermal expansion coefficient of optical glass is smaller than that of the metal frame. Therefore, if the element positioning surface 4 and the frame mounting surface 3 are tightly combined, then when the temperature decreases, the shrinkage amount of the mounting frame 1 will be greater than that of the optical element 2, and the mounting frame 1 will exert extrusion on the optical element 2, which will cause deformation or even damage to the optical element 2; and if the temperature rises, there will be a situation where the frame mounting surface 3 is peeled off from the optical element 2, which will cause the optical element 2 to be unable to be positioned. At the same time, if the traditional adhesive fixing method is used, problems such as degumming are likely to occur due to the thin thickness of the adhesive. Even if mechanical fixing methods such as bolts are used, it will also cause pulling on the optical element 2. Through the conformal device proposed by the present invention, the axial length of the optical element 2, the axial spacing of the frame mounting surface 3, and the axial thickness of the filling medium 6 are reasonably controlled, and at the same time, the thermal expansion coefficients of the three materials are coordinated, so that the sum of the axial thermal deformation amounts of the optical element 2 and the filling medium 6 is equal to the axial thermal deformation amount between the frame mounting surfaces 3 under the condition of temperature change, thus realizing the above-mentioned thermal stress elimination property, and problems such as extrusion, under-constraint, pulling, and degumming of the optical element 2 will not occur.

[0046] The filling medium 6 can be composed of one or more materials, and multiple materials can be layered or mixed, wherein multiple materials can improve the flexibility and freedom of material selection of the filling medium 6; it has affinity to the mounting frame 1 and the optical element 2 in contact with itself, and the affinity can make the filling medium 6 better adapt to various errors including surface roughness and local defects between the optical element 2 and the mounting frame 1 and make the filling medium 6 more tightly combined with the mounting frame 1 and the optical element 2, so that the filling medium 6 can better fill the gap between the optical element 2 and the mounting frame 1, and will not break when the junction between the filling medium 6 and the mounting frame 1 and the optical element 2 needs to be processed, thereby making the junction smoother and more secure.

[0047] Although the limiting protrusion 5 can limit the position of the optical element 2, the stress relief structure of the limiting protrusion 5 reduces its own rigidity and cannot provide sufficient support for the optical element 2 in some application scenarios. Therefore, a positioning extension block 7 can be provided on the frame mounting surface 3 as needed. Figure 5 As shown, the positioning extension block 7 also does not protrude from the mounting frame 1 on the conformal surface side, and has a corresponding distance from the surface of the mounting frame 1. It can be used together with the limiting protrusion 5 with a stress relief structure. At this time, the position limiting direction of the optical element 2 and the position limiting direction of the limiting protrusion 5 on the optical element 2 can at least produce mutually perpendicular components, so that the optical element 2 can be positioned. The positioning extension block 7 does not have a stress relief structure, and the higher rigidity can provide stronger support for the optical element 2. It does not protrude from the mounting frame 1 on the conformal surface side in order to make the filling medium 6 completely cover the mounting surface of the mounting frame 1 and the corresponding positioning surface of the optical element 2 on the conformal surface side, so as to better eliminate the gap. The corresponding distance from the surface of the mounting frame 1 can also ensure that the filling medium 6 is firm and reliable.

[0048] In order to prevent the positioning extension block 7 without a stress relief structure from affecting the thermal stress relief function of the conformal device and its adaptability to pressure changes and impact vibrations, the positioning extension block 7 only contacts the optical element 2 in the direction of its corresponding position restriction, and does not contact the optical element 2 in other directions and leaves sufficient gaps. Figure 5 As shown, the positioning extension block 7 only limits the vertical position of the optical element 2, while the lateral position is limited by the limiting protrusion 5, so a corresponding gap is left without limiting the lateral direction of the optical element 2. The corresponding gap is to ensure that within the design temperature change range, the positioning extension block 7 will not limit the normal deformation and displacement of the optical element 2 due to the difference in thermal deformation of components such as the optical element 2, the mounting frame 1 and the positioning extension block 7, as well as due to factors such as pressure changes and impact vibrations.

[0049] To further increase the strength of the filling medium 6, a mesh reinforcement structure can be added to the filling medium 6. The mesh reinforcement structure has a relatively low stiffness but strong toughness, similar to the roots in soil and straw in mud bricks, which can make the filling medium 6 more firm and increase the overall toughness of the filling medium 6. At the same time, the mesh reinforcement structure should be at a corresponding distance from the conformal surface to prevent the mesh reinforcement structure from exposing the conformal surface and damaging the flatness and smoothness of the conformal surface.

[0050] In summary, the present invention eliminates the problem that the gap between the optical element 2 and the mounting frame 1 in the traditional conformal device is difficult to solve, which damages the flatness and smoothness of the conformal surface, and also solves the sealing problem at the installation position of the optical element 2 of the conformal device. At the same time, the fluidity or elasticity of the filling medium 6 can also eliminate the influence of various machining errors between the optical element 2 and the mounting frame 1. Cooperating with the stress-relieving structure of the limiting protrusion 5, it can greatly reduce the precision requirements during the installation of components such as the optical element 2, the mounting frame 1, and the limiting protrusion 5, thereby reducing the processing difficulty. Since the stiffness and strength of the filling medium 6 are generally weaker than those of the optical element 2 and the mounting frame 1, and combined with the stress-relieving structure of the limiting protrusion 5, a certain degree of soft connection is established between the optical element 2 and the mounting frame 1 compared to themselves. Therefore, the filling medium 6 and the limiting protrusion 5 can absorb the stress generated by temperature, pressure changes, impact, and vibration, enabling the entire conformal device to adapt to changes in pressure, temperature, etc., and deformation problems caused by impact and vibration, thereby ensuring the stable and reliable performance of the entire conformal device. Impact and vibration may also occur during the processing. Therefore, the conformal device proposed by the present invention can also overcome the impact and vibration that may occur during the processing, thereby improving the reliability and yield of the processing. Through the cooperation between the material properties and spatial dimensions of components such as the optical element 2, the mounting frame 1, the filling medium 6, and the limiting protrusion 5, the influence of temperature changes on the form and position accuracy of the optical element 2 can be further reduced. For the above spatial dimensions of components such as the optical element 2 and the mounting frame 1, conventional processing means are sufficient to meet the precision requirements for the stress-relieving property to take effect. Therefore, it is not necessary to deliberately improve the processing precision of components for the realization of the stress-relieving property. At the same time, a certain amount of stress can be allowed to exist in the optical element 2 itself, and the soft connection formed by the filling medium 6 and the limiting protrusion 5 can also absorb a part of the stress, which further reduces the precision requirements for components.

[0051] As can be seen from the above analysis, the shape, size, and material properties of the filling medium 6 with fluidity or elasticity, the limit protrusions 5 with stress-relieving structures, and the optical element 2 and the mounting frame 1, etc., as an overall coordinated entity, jointly achieve the elimination of gaps, the reduction of precision requirements for components, and the improvement of the adaptability of the conformal device to the operating environment. Their functions cannot be regarded as being separable or isolated. For example, the limit protrusions 5 determine the position of the filling medium 6 relative to the mounting frame 1 while also determining the thickness of the filling medium 6 in this direction, and at the same time strengthen the filling medium 6. The stress-relieving structure enables the flexibility of the filling medium 6 to play, thereby reducing the impact of deformation on the optical element 2. At the same time, the filling medium 6 compensates for the reduction in the stiffness of the limit protrusions 5 caused by the stress-relieving structure, further strengthening the support and positioning of the optical element 2 and reducing the impact of processing errors of the limit protrusions 5, the optical element 2, and the mounting frame 1 on the device performance. The thickness of the filling medium 6 and the length of the limit protrusions 5 are related to the size and material properties of the optical element 2 and the mounting frame 1.

[0052] It should be specifically noted that the pipe conformal device in the embodiment only needs to perform conformal treatment on the inner surface of the pipe due to functional requirements. However, to introduce the present invention more comprehensively through complex situations, a double-sided conformal solution is provided in the illustration, that is, both sides of the conformal device can be processed into conformal surfaces, and the final effect is as Figure 1 shown, where structures such as the limit protrusions 5 are completely covered by the filling medium 6. When only one side is used as the conformal surface, the shapes and arrangements of the limit protrusions 5, the optical element 2, the mounting frame 1, and the filling medium 6 can be designed separately according to actual needs with reference to the illustration. At the same time, the conformal device is not limited to pipe types only, and there are also various conformal devices such as enclosed types like hoods, and Figure 9 the non-enclosed types shown, etc. The number and position of the optical element 2 can also be set according to actual needs. For example, Figure 6 as shown, two optical elements are arranged opposite to each other. In short, simple changes in the type and structural form of the conformal device will not deviate from the application and protection scope of the present invention. The structural form of this conformal device can also be applied to other devices with similar characteristics.

[0053] The above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A conformal device, characterized in that: It includes an installation frame (1), an optical element (2), a limiting protrusion (5), and a filling medium (6); there is a limiting protrusion (5) on the frame installation surface (3) of the installation frame (1), and the optical element (2) is restricted by the limiting protrusion (5) to form relative positioning with the installation frame (1) within the installation space formed on the frame installation surface (3). The limiting protrusion (5) does not protrude from the installation frame (1) on the conformal surface side and is at a corresponding distance from the conformal surface. The filling medium (6) has a certain fluidity or equivalent elasticity before curing and stabilization. The filling medium (6) fills the gap between the optical element (2) and the installation frame (1), and the optical element (2), the installation frame (1), and the filling medium (6) jointly form a conformal surface. The limiting protrusion (5) has a stress-relieving structure, the stress-relieving structure has multi-directionality, and at least one stress-relieving direction is the same as the limiting direction of the limiting protrusion (5) on the optical element (2).

2. The conformal device according to claim 1, wherein: The limiting protrusion (5) and the installation frame (1) are of an integral structure or a subsequently installed structure; when the limiting protrusion is a subsequently installed structure, the material of the limiting protrusion (5) is different from the material of the installation frame (1).

3. A conformal device according to claim 1, wherein: A plurality of the limiting protrusions (5) are arranged horizontally and vertically on the frame installation surface (3).

4. The conformal device according to claim 1, wherein: The limiting protrusion (5) simultaneously constrains the multi-directional positions of the optical element (2) including the horizontal and vertical directions.

5. The conformal device according to claim 1, wherein: The material properties and spatial dimensions of the optical element (2), the installation frame (1), and the filling medium (6) cooperate with each other to form a thermal stress elimination property.

6. A conformal device according to claim 1, wherein: The filling medium (6) is composed of one or more materials, and has an affinity for the installation frame (1) and the optical element (2) in contact with itself.

7. A conformal device according to claim 1, wherein: There is a positioning extension block (7) on the frame installation surface (3). The positioning extension block (7) does not protrude from the installation frame (1) on the conformal surface side and is at a corresponding distance from the conformal surface. The positioning extension block (7) is used to limit the position of the optical element (2) relative to the installation frame (1), and the position limiting direction thereof and the position limiting direction of the limiting protrusion (5) on the optical element (2) can at least generate mutually perpendicular components.

8. A conformal device according to claim 7, wherein: The positioning extension block (7) only contacts the optical element (2) in its corresponding position limiting direction, and does not contact the optical element (2) in other directions.

9. The conformal device according to claim 1, characterized in that: There is a net-shaped reinforcement structure in the filling medium (6), and the net-shaped reinforcement structure is at a corresponding distance from the conformal surface.

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