Infrared visible light common-aperture reflector structure

Abstract

The invention discloses an infrared visible light common-caliber reflector structure, which comprises a reflector, a base and base screws, and is characterized in that the reflector and the base are positioned by adopting a spigot and are fixedly connected with the spigot in the reflector through a plurality of base screws; a first axial force unloading groove and a second axial force unloading groove are formed in the surface of the reflector and located at the upper end and the lower end of the spigot respectively, and a pair of radial force unloading grooves are formed in the surface of the reflector and located at the left side and the right side of the spigot. The reflector and the base are both made of beryllium-aluminum materials, athermalization design is good, beryllium-aluminum alloy is high in rigidity, deformation caused by vibration in the polishing, mounting, gravity and working processes is reduced, meanwhile, the reflector is designed to be additionally provided with axial and radial force unloading grooves, under the condition that rigidity is guaranteed, the influence on the surface type in the mounting process is reduced, and the service life of the reflector is prolonged. And the reflector adopts the form of a hexagon, a triangle and an edge chamfer, so that the weight reduction design is realized, the optical load is reduced, and the stability in the use process is improved.

Description

Technical Field

[0001] The present invention relates to the field of infrared imaging technology, and more specifically, to an infrared and visible light common aperture reflector structure. Background Art

[0002] With the development of aerospace, optical systems are moving towards long focal length, large width, small size and light weight. Due to the advantages of reflective systems such as no chromatic aberration, small size and light weight, they are widely used in aerospace systems.

[0003] At present, due to its structural setting, the reflector is usually installed and fixed between the base with screws. During operation, the reflector will be deformed due to high and low temperatures, resulting in changes in the overall surface shape of the reflector caused by screw stress, which in turn affects the normal operation of the equipment. The reflector adopts a hexagonal and triangular weight-reduction design to achieve lightweight. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an infrared and visible light co-aperture reflector structure, by arranging the reflector and the base to be both made of beryllium aluminum material, using the same material, and having a good athermal design, the beryllium aluminum alloy has a high specific stiffness, which reduces deformation caused by polishing, installation, gravity and vibration during operation, and at the same time, the reflector is designed to be equipped with axial and radial unloading grooves, which reduce the influence of the surface shape during installation while ensuring the stiffness, and the reflector adopts a hexagon plus a triangle with chamfered edges to achieve a weight-reducing design, reduce the optical load, and increase the stability during use, and at the same time, ensure that the areas where the axial unloading grooves and the radial unloading grooves are opened are staggered to further ensure the strength of the installation, reduce the stiffness of the connection to a certain extent, and block the vibration from the base during vibration, so that the reflector as a whole achieves a weight-reducing design, reduces the weight of the optical load, and achieves a lightweight design to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an infrared visible light common aperture reflector structure, comprising a reflector, a base, and a base screw, wherein the reflector and the base are positioned by a stopper, and are fixedly connected to the stopper inside the reflector by a plurality of base screws, a first axial unloading groove and a second axial unloading groove are respectively provided on the surface of the reflector and located at the upper and lower ends of the stopper, a pair of radial unloading grooves are respectively provided on the surface of the reflector and located at the left and right sides of the stopper, an annular fan-shaped groove is provided inside the reflector and located on the side of the first axial unloading groove, and circular chamfers are respectively provided at both ends of the radial unloading groove, and the diameter of the circular chamfer is greater than the width value of the radial unloading groove;

[0006] The radial unloading groove and the second axial unloading groove are distributed at a vertical angle in the three-dimensional space.

[0007] In a preferred embodiment, the reflector and the base are designed with a single core shaft.

[0008] In a preferred embodiment, the overall mirror surface of the reflector is designed with a hexagonal and triangular array distribution, and has rounded edges.

[0009] In a preferred embodiment, the reflector and the base are made entirely of beryllium aluminum material.

[0010] In a preferred embodiment, the second axial unloading groove, radial unloading groove and base screw are radially distributed on the surface and inside of the reflector with the center of the reflector as the base point.

[0011] Technical effects and advantages of the present invention:

[0012] The present invention sets the reflector and the base to be made of beryllium aluminum material, adopts the same material, has good athermal design, and has high strength of beryllium aluminum alloy, which reduces deformation caused by polishing, installation, gravity and vibration during operation. At the same time, the reflector is designed to be equipped with axial and radial unloading grooves, which reduces the influence of the surface shape during installation while ensuring rigidity. The reflector adopts the form of hexagon plus triangle with chamfered edges, which realizes weight reduction design, reduces optical load, and increases stability during use.

[0013] Axial force unloading can be achieved by adding two axial force unloading grooves on the reflector, and a ring-shaped fan-shaped groove is provided on the side of the first axial force unloading groove, which can reduce the extrusion deformation of the mounting surface caused by the tension of the thread when the screw is tightened, thereby ensuring that the deformation will not be transmitted to the phase surface. At the same time, in order to reduce the influence of the installation pre-tightening between the radial screws on the reflector, a plurality of radial force unloading grooves are symmetrically radially opened on the reflector, thereby blocking the deformation transmission between the two screws. At the same time, there are force unloading grooves in the axial and radial directions in the installation area of ​​the screw, which not only reduces the mechanical transmission and the deformation of the phase surface caused, but also ensures the imaging quality. At the same time, it ensures that the areas where the axial force unloading grooves and the radial force unloading grooves are opened are staggered, further ensuring the strength of the installation, reducing the stiffness of the connection to a certain extent, and blocking the vibration from the base direction during the vibration process. The reflector as a whole realizes a weight-reducing design, reduces the weight of the optical load, realizes a lightweight design, reduces the influence of vibration on the reflector during use, and improves the surface accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a side structural schematic diagram of the present invention;

[0016] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 5 It is a schematic diagram of a cross-sectional three-dimensional structure of the present invention;

[0019] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0020] Figure 7 It is a schematic diagram of the local structure of the top surface of the present invention;

[0021] Figure 8 It is a structural schematic diagram of the reflector installation state of the present invention.

[0022] The reference numerals are: 1, reflector; 2, base; 3, base screw; 11, first axial unloading groove; 12, second axial unloading groove; 13, radial unloading groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] As attached Figure 1 To Attachment Figure 8 An infrared visible light common aperture reflector structure shown includes a reflector 1, a base 2, and a base screw 3. The reflector 1 and the base 2 are positioned by a stopper, and are fixedly connected to the stopper inside the reflector 1 by a plurality of base screws 3. A first axial unloading groove 11 and a second axial unloading groove 12 are respectively provided on the surface of the reflector 1 and located at the upper and lower ends of the stopper, a pair of radial unloading grooves 13 are provided on the surface of the reflector 1 and located at the left and right sides of the stopper, an annular fan-shaped groove is provided inside the reflector 1 and located on the side of the first axial unloading groove 11, and circular chamfers are provided at both ends of the radial unloading groove 13, and the diameter of the circular chamfer is greater than the width of the radial unloading groove 13;

[0025] The radial unloading groove 13 and the second axial unloading groove 12 are distributed at a vertical angle in the three-dimensional space.

[0026] The reflector 1 and the base 2 are jointly configured to be beryllium aluminum material. Beryllium aluminum has good specific stiffness, strong deformation resistance, reduces optical path distortion, and has low density. It is a lightweight and high-strength alloy. At the same time, the reflector 1 and the base 2 are made of the same material, which has an excellent athermal design, and can avoid the influence of temperature deformation on the phase surface when using different materials in high and low temperature environments. In addition, beryllium aluminum has a low density and is lighter than ceramic and glass materials. It can achieve a lightweight and low optical load design. Beryllium aluminum alloy has a high specific stiffness, which reduces deformation caused by polishing, installation, gravity and vibration during work. In addition, beryllium aluminum has low density and high strength, has excellent machining performance and good toughness, and compared with beryllium, the processing cost is significantly reduced, which is more competitive.

[0027] By using a hexagon plus a triangle shape for the reflector and chamfering the edges, a weight-reducing design is achieved, the weight of the optical load is reduced, a lightweight design is achieved, the impact of vibration on the reflector during use is reduced, and the surface accuracy is ensured.

[0028] The reflector 1 and the base 2 are designed with a single core axis. The overall mirror surface of the reflector 1 is designed with a hexagonal and triangular array distribution, and the edges are chamfered. The reflector 1 and the base 2 are made of beryllium aluminum material as a whole. The second axial unloading groove 12, the radial unloading groove 13 and the base screw 3 are radially distributed on the surface and inside of the reflector 1 with the center of the reflector 1 as the base point.

[0029] Working principle of the present invention:

[0030] First, the reflector 1 and the base 2 are positioned by a stopper, and a plurality of base screws 3 are used to fix the stopper inside the reflector 1. Axial unloading can be achieved by adding two axial unloading grooves on the reflector 1, and a ring-shaped fan-shaped groove is provided on the side of the first axial unloading groove 11. The fan-shaped groove can reduce the extrusion deformation of the mounting surface caused by the tension of the thread when the base screw 3 is tightened, thereby ensuring that the deformation will not be transmitted to the phase surface. At the same time, in order to reduce the influence of the installation pre-tightening between the radial screws on the reflector 1, a plurality of radial unloading grooves 13 are symmetrically radially provided on the reflector 1. The deformation transmission between the two screws is blocked, and at the same time, there are unloading grooves in the axial and radial directions in the installation area of ​​the screws, which not only reduces the transmission of mechanics and the resulting surface deformation, and ensures the imaging quality, but also ensures that the areas where the two axial unloading grooves and the radial unloading grooves 13 are opened are staggered, further ensuring the strength of the installation, reducing the stiffness of the connection to a certain extent, and blocking the vibration from the direction of the base 2 during the vibration process. The reflector 1 is designed to be lightweight as a whole, reducing the weight of the optical load, achieving a lightweight design, and reducing the impact of vibration on the reflector 1 during use, ultimately achieving the purpose of improving the surface accuracy.

[0031] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0032] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0033] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An infrared and visible light common aperture reflector structure, comprising a reflector, a base, and base screws, characterized in that: The reflector and the base are positioned by a stopper, and are fixedly connected to the stopper inside the reflector by a plurality of base screws; a first axial unloading groove and a second axial unloading groove are respectively provided on the surface of the reflector and located at the upper and lower ends of the stopper; a pair of radial unloading grooves are provided on the surface of the reflector and located at the left and right sides of the stopper; an annular fan-shaped groove is provided inside the reflector and located on the side of the first axial unloading groove; circular chamfers are respectively provided at both ends of the radial unloading groove, and the diameter of the circular chamfer is greater than the width of the radial unloading groove; The radial unloading groove and the second axial unloading groove are distributed at a vertical angle in the three-dimensional space.

2. The infrared and visible light common aperture reflector structure according to claim 1, characterized in that: The reflector and the base are designed with a single core shaft.

3. The infrared and visible light common aperture reflector structure according to claim 1, characterized in that: The overall mirror surface of the reflector adopts a hexagonal and triangular array distribution design, and adopts a rounded edge form.

4. The infrared and visible light common aperture reflector structure according to claim 1, characterized in that: The reflector and the base are made of beryllium aluminum material as a whole.

5. The infrared and visible light common aperture reflector structure according to claim 1, characterized in that: The second axial unloading groove, the radial unloading groove and the base screw are radially distributed on the surface and inside of the reflector with the center of the reflector as the base point.

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