Prism assembly with double fixing modes

Abstract

The utility model relates to the technical field of space optics, in particular to a prism assembly with double fixing modes, which comprises an adapter, a glue joint base and a prism cover, and is characterized in that the prism cover comprises a connecting base and a prism shell; the prism shell is a hollow cube with an opening, five faces of the cube are closed, and one face of the cube is open. The prism shell covers the prism and is connected with the cementing base through the connecting base; a light through hole is formed in the center of the closed plane of each cube, and the axes of the light through holes intersect at one point in the cube; each plane is further provided with four threaded holes, and the four threaded holes are close to the four corners of the plane where the four threaded holes are located respectively. The utility model has the advantages that the prism cover is arranged outside the prism, and the prism cover not only plays a role in protecting the prism from external damage, but also can effectively prevent the prism from being damaged due to accidental collision.

Description

Technical Field

[0001] The utility model relates to the technical field of space optics, in particular to a prism assembly with a double fixing method. Background Art

[0002] Due to the extremely high precision and stability requirements of space camera systems, in addition to the high-precision and high-stability manufacturing of optical and mechanical components, it is also necessary to ensure that each optical and mechanical component is precisely installed in its intended position to meet the system's design requirements. The choice of assembly method directly impacts the achievement of system performance and the duration of the assembly cycle. During the assembly process, the primary mirror often serves as a reference point for each optical component. To prevent the primary mirror's optical axis from being obstructed by other components during assembly, prisms are widely used to determine and derive the primary mirror's optical axis, facilitating subsequent assembly processes. However, current prism assembly solutions mostly rely on a cubic prism combined with an adhesive base, bonding one surface of the prism to the base using a two-component epoxy adhesive. This connection has limited strength, making the prism susceptible to dislodging when the system is exposed to vibration. Furthermore, the prism is exposed, making it susceptible to damage or dislodgment due to bumps, posing a safety hazard. Utility Model Content

[0003] In view of this, the present invention aims to create a prism assembly with a dual fixing method, in which the prism is covered by a prism housing and fixed in the prism housing by a ball head screw, thereby improving the fixation of the prism.

[0004] In order to achieve the above-mentioned purpose, the technical solution created by the utility model is implemented as follows:

[0005] A prism assembly with a dual fixing method includes: an adapter seat, which is provided with a positioning portion; a bonding base, which is arranged on the adapter seat through the positioning portion; the bonding base is provided with an adhesive surface for gluing and fixing one surface of the prism; a prism cover, which includes a connecting base and a prism shell; the prism shell is a hollow cube with an opening, and the cube has five closed sides and one open side; the cube is vertically arranged on the connecting base, and one side of the opening of the cube is connected to the connecting base; the prism shell covers the prism and is connected to the bonding base through the connecting base; a light hole is provided at the center position of each closed plane of the cube, and the axis of each light hole intersects at a point in the cube to form the center of the light-transmitting area; four threaded holes are provided on each of the three mutually perpendicular closed planes of the cube, and the four threaded holes are respectively close to the four corners of the plane where they are located.

[0006] Furthermore, a cube is a cuboid.

[0007] Furthermore, when the prism is first placed in the internal cavity of the prism housing, the center of the light-transmitting area is not concentric with the center of the prism; when each of the four ball head screws is passed through each closed plane with four threaded holes, and the four ball head screws are tightened to push all the outer surfaces of the prism except the adhesive surface to fit with the corresponding inner surfaces in the prism housing, the center of the light-transmitting area is concentric with the center of the prism.

[0008] Furthermore, the ball head screw is made of polyimide.

[0009] Furthermore, a connection hole for connecting to the adhesive base is provided on the positioning portion; a weight-reducing hole and a weight-reducing groove are also provided on the adapter, the weight-reducing hole is set through the center position of the adapter, and the weight-reducing groove is set on the other side away from the prism.

[0010] Furthermore, the positioning portion is two positioning grooves arranged at intervals, and the two connecting holes are arranged on the positioning grooves.

[0011] Furthermore, the positioning portion is two bosses arranged at intervals, and the two connecting holes are arranged on the bosses.

[0012] Furthermore, the bonding base includes a base body and a rectangular boss extending from the base body in a direction toward the prism; the adhesive surface is arranged on the upper surface of the rectangular boss, and a circle of closed glue injection grooves for strengthening the adhesive is also provided on the periphery of the adhesive surface; two positioning bosses adapted to the positioning part extend from the base body in a direction away from the prism to ensure the installation of the bonding base and the adapter.

[0013] Furthermore, a rectangular through hole adapted to the opening of the prism housing is provided at the center of the connecting base, and the opening is aligned with the rectangular through hole.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0015] 1) A prism cover is installed on the outside of the prism to protect it from external damage and effectively prevent damage from accidental bumps. Ball screws are designed on each side of the prism cover to firmly secure the prism and prevent the prism from tilting during the movement of the ball screws. This ensures that the prism surface and the inner surface of the prism cover fit tightly together without any gaps.

[0016] 2) The combination of adhesive and ball screw fixation not only enhances the reliability of prism fixation, but also effectively avoids the potential for breakage or detachment caused by adhesive alone. Furthermore, this combination prevents prism detachment due to insufficient adhesive strength in vibrating environments, significantly improving the stability and durability of the entire structure.

[0017] 3) By selecting a ball head screw made of polyimide material, this design not only achieves a stable fixation of the prism, but also greatly reduces the extrusion stress on the prism surface due to its good material properties, protecting the optical performance of the prism from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic structural diagram of a prism assembly with a dual fixing method according to an embodiment of the present utility model;

[0020] Figure 2 This is a structural diagram of one side of the adapter provided with a positioning portion according to an embodiment of the present utility model;

[0021] Figure 3 This is a structural diagram of one side of the adapter provided with a weight-reducing groove according to an embodiment of the present utility model;

[0022] Figure 4 This is a structural diagram of a bonding base provided with an adhesive surface on one side according to an embodiment of the present utility model;

[0023] Figure 5 This is a structural diagram of a side of a rectangular boss provided on a bonding base provided according to an embodiment of the present utility model;

[0024] Figure 6 It is a structural schematic diagram of a prism cover provided according to an embodiment of the utility model.

[0025] The accompanying drawings include: 1. adapter; 11. positioning part; 12. connecting hole; 13. weight-reducing hole; 14. weight-reducing groove; 2. bonding base; 21. base body; 22. rectangular boss; 23. adhesive surface; 24. glue injection groove; 25. positioning boss; 3. prism cover; 31. connecting base; 32. prism shell; 33. light hole; 34. threaded hole; 35. ball head and ball head top screw; 4. prism. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. A person skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0031] like Figure 1 As shown, an embodiment of the present invention provides a prism assembly with a dual fixing method, comprising: an adapter 1, a bonding base 2, a prism cover 3 and a prism 4; a positioning portion 11 is provided on the side of the adapter 1 facing the prism; a connecting hole 12 for connecting to the bonding base 2 is provided on the positioning portion 11; in order to reduce the overall weight of the adapter 1 without affecting its structural strength and functionality, a weight-reducing hole 13 and a weight-reducing groove 14 are further provided on the adapter, the weight-reducing hole 13 is arranged through the center of the adapter 1, and the weight-reducing groove 14 is arranged on the other side away from the prism 4.

[0032] In this embodiment, the positioning portion 11 is two spaced bosses, each of which is spaced apart with two connection holes 12. In other embodiments, the positioning portion 11 is two spaced apart positioning grooves, each of which is spaced apart with two connection holes 12.

[0033] In this embodiment, the adapter 1 is rectangular in shape. In other embodiments, the adapter 1 is circular or other shapes.

[0034] The adhesive base 2 is arranged on the adapter 1 through the positioning portion 11; the adhesive base 2 is provided with an adhesive surface 23 for adhesively fixing one surface of the prism 4;

[0035] The adhesive base 2 includes a base body 21 and a rectangular boss 22 extending from the base body toward the prism. An adhesive surface 23 is provided on the upper surface of the rectangular boss. One side of the prism 4 is glued to the adhesive surface 23. A closed adhesive groove 24 is also provided around the outer periphery of the adhesive surface 23 to enhance bonding strength. In this embodiment, the adhesive surface 23 is rectangular, and the closed adhesive groove 23 is a rectangular groove. In other embodiments, the adhesive surface 23 is circular, and the closed adhesive groove 24 is an annular groove. The width of the adhesive groove is 0.5 mm, and the depth is 0.3 mm.

[0036] Two positioning bosses 25 adapted to the positioning grooves extend from the base body 21 in a direction away from the prism 4 . The base body 21 is connected to the adapter 1 through the cooperation between the positioning bosses 25 and the positioning grooves.

[0037] In this embodiment, the positioning groove and the positioning boss 25 are both rectangular in shape.

[0038] The prism cover 3 includes a connecting base 31 and a prism housing 32. The prism housing 32 is a hollow cube with an opening, five closed sides and one open side. The cube is vertically mounted on the connecting base 31, with one side of the cube's opening connected to the connecting base 31. The prism housing 32 covers the prism 4 and is connected to the adhesive base 2 via the connecting base 31. A light hole 33 is provided at the center of each closed plane of the cube, with the axes of each light hole 33 intersecting at a point within the cube, namely the center of the light-transmitting area. Four threaded holes 34 are also provided on each of the three mutually perpendicular closed planes of the cube, located near the four corners of the respective closed planes. Three sets of ball screws 35 are provided, each set of four ball screws 35 being used to connect to the three closed planes with four threaded holes 34.

[0039] In this embodiment, the prism 4 is a cube with a side length of 20 mm, and the light hole 33 has a diameter of 20 mm. The prism housing 32 is a cube with an internal cavity, and each side of the internal cavity is 20.2 mm, which facilitates the placement of the prism 4. When the prism 4 is first placed in the internal cavity of the prism housing 32, the center of the light-transmitting area is not concentric with the center of the prism 4. However, when each of the four ball screws 35 is passed through each closed plane with four threaded holes 34 and the ball screws 35 are tightened to push all outer surfaces of the prism 4, except the adhesive surface, into contact with the corresponding inner surfaces of the prism housing 32, the center of the light-transmitting area becomes concentric with the center of the prism 4. The specific adjustment steps are as follows: first, insert four ball screws 35 through each of the closed surfaces with four threaded holes 34 and tighten the four ball screws 35 to push the prism 4 against the prism housing 32. Then, sequentially insert two other sets of four ball screws 35 through the other two closed surfaces with four threaded holes 34 to ensure that all outer surfaces of the prism 4, except the adhesive surface, are in contact with the corresponding inner surfaces of the prism housing 32. When all outer surfaces of the prism 4 are in contact with the corresponding inner surfaces of the prism housing 32, the geometric center of the prism 4 coincides with the center of the prism housing 32, that is, the center of the light-transmitting area.

[0040] Furthermore, the ball head screw 35 is made of polyimide.

[0041] Furthermore, a rectangular through hole matching the opening of the prism housing 32 is provided at the center of the connecting base 31 , and the opening is aligned with the rectangular through hole.

[0042] The above-mentioned dual-fixing method for assembling a prism assembly is as follows: first, the bonding base 2 and the adapter 1 are fixed together; secondly, a two-component epoxy adhesive is applied to a flat surface of the prism 4 and the adhesive surface 23 of the bonding base 2, and the two are bonded together; then, the prism cover 3 is placed on the bonding base 2 and covers the prism 4; and the prism cover 3 is fixed to the bonding base 2; a ball head screw 35 is passed through the threaded hole 34 in the closed plane, and the polyimide ball head screws are tightened one by one on the surface, pushing the outer surface of the prism 4 against the inner surface of the prism cover, completing the assembly of the prism assembly until the epoxy adhesive is cured.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0044] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A dual-fixing prism assembly, characterized in that: include: An adapter seat, wherein a positioning portion is provided on the adapter seat; A bonding base, the bonding base being arranged on the adapter through the positioning portion; The adhesive base is provided with an adhesive surface for adhesively fixing one surface of the prism; A prism cover, comprising a connecting base and a prism shell; the prism shell is a hollow cube with an opening, the cube being closed on five sides and open on one side; the cube being vertically arranged on the connecting base, and one side of the opening of the cube being connected to the connecting base; the prism shell covers the prism and is connected to the adhesive base through the connecting base; a light-through hole is provided at the center position of each closed plane of the cube, and the axis of each light-through hole intersects at a point in the cube to form the center of the light-through area; four threaded holes are provided on each of the three mutually perpendicular closed planes of the cube, and the four threaded holes are respectively located near the four corners of the closed plane on which they are located.

2. The dual-fixing prism assembly according to claim 1, characterized in that: The cube is a cube.

3. The dual-fixing prism assembly according to claim 1, characterized in that: When the prism is first placed in the internal cavity of the prism housing, the center of the light-transmitting area is not concentric with the center of the prism; when each of the four ball screws is passed through each of the closed planes provided with the four threaded holes, and the four ball screws are tightened to push all outer surfaces of the prism except the adhesive surface to fit with the corresponding inner surfaces in the prism housing, the center of the light-transmitting area becomes concentric with the center of the prism.

4. The dual-fixing prism assembly according to claim 3, characterized in that: The material of the ball head screw is polyimide.

5. The dual-fixing prism assembly according to claim 1, characterized in that: The positioning portion is provided with a connection hole for connecting to the adhesive base; the adapter is also provided with a weight-reducing hole and a weight-reducing groove, the weight-reducing hole is set through the center position of the adapter, and the weight-reducing groove is set on the other side away from the prism.

6. The dual-fixing prism assembly according to claim 5, characterized in that: The positioning portion is two positioning grooves arranged at intervals, and the connecting hole is arranged on each of the positioning grooves.

7. The dual-fixing prism assembly according to claim 5, characterized in that: The positioning portion is two bosses arranged at intervals, and the connecting hole is arranged on each of the bosses.

8. The dual-fixing prism assembly according to claim 5, characterized in that: The bonding base includes a base body and a rectangular boss extending from the base body toward the prism; the adhesive surface is arranged on the upper surface of the rectangular boss, and a circle of closed glue injection grooves for strengthening the adhesive is also provided on the periphery of the adhesive surface; two positioning bosses adapted to the positioning part extend from the base body in a direction away from the prism to ensure the installation of the bonding base and the adapter.

9. The dual-fixing prism assembly according to claim 1, wherein: A rectangular through hole matching the opening of the prism housing is provided at the center of the connecting base, and the opening is aligned with the rectangular through hole.

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