Butterfly-shaped optical device for vacuum environment

Abstract

The utility model relates to a butterfly-shaped optical device used in a vacuum environment, which comprises a shell and a cover plate for sealing and covering an opening of the shell, the weak edge of the periphery of the cover plate and the end face of the opening end of the shell adopt a parallel sealing and welding mode to realize true airtight packaging, and a reinforcing cover for effectively limiting arching deformation of the cover plate is arranged on one side of the cover plate away from the shell. The peripheral edge of the reinforcing cover is fixed to the area, not covered with the cover plate, of the opening end face of the shell. The butterfly-shaped optical device has the beneficial effects that the reinforcing cover for effectively limiting the arching deformation of the cover plate is added, so that the butterfly-shaped optical device is suitable for vacuum environments, such as outer space and spaceflight exploration, and the cover plate does not have large deformation to cause air leakage of the cover plate, so that the cover plate and an optical device packaged in the shell are not influenced.

Description

Technical Field

[0001] This utility model relates to the field of butterfly-shaped optical device technology, specifically to a butterfly-shaped optical device for use in a vacuum environment. Background Technology

[0002] In traditional butterfly-shaped optical devices, the weak edges of the cover plate and the end face of the shell opening are sealed using parallel welding to achieve a true gas seal. Dry nitrogen at standard atmospheric pressure is filled into both the cover plate and the shell. The cover plate used has an inverted U-shaped structure with an overall thickness greater than 1.8mm. The thickness of the weak edges of the cover plate overlapping the upper surface of the shell is only 0.2mm ± 0.05mm. If it is too thick, the cover plate will be difficult to melt during parallel welding, failing to guarantee an effective seal. If it is too thin, the airtightness after melting the cover plate during parallel welding cannot be guaranteed. Specifically... Figure 1 and Figure 2 As shown, since the cover plate and the outer shell are fitted with a clearance, there is a weak point of 0.2mm±0.05mm. When this butterfly-shaped optical device is used in a vacuum environment, such as outer space or aerospace exploration, the low external air pressure will generate pressure, causing the weak point of the cover plate to deform and leak air, thereby affecting the optical device hermetically sealed between the cover plate and the outer shell. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a butterfly-shaped optical device for use in a vacuum environment, so as to overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A butterfly-shaped optical device for use in a vacuum environment includes: a housing and a cover plate that seals the opening of the housing. The weak edges of the cover plate are sealed to the end face of the opening of the housing by parallel welding to achieve a vacuum seal. A reinforcing cover is arranged on the side of the cover plate away from the housing to effectively limit the arching deformation of the cover plate. The edges of the reinforcing cover are fixed to the area of ​​the end face of the opening of the housing that is not covered by the cover plate.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the reinforcing cover includes: a panel, on which a protrusion surrounds the cover plate, the height of the protrusion being higher than the weak edges around the cover plate, and the protrusion being welded to the area of ​​the outer shell opening end face that is not covered by the cover plate.

[0008] Furthermore, the panel thickness is greater than 1.27mm.

[0009] Furthermore, the cover plate contains lead material.

[0010] Furthermore, optical components are installed inside the casing.

[0011] Furthermore, the cover plate is made of Kovar material.

[0012] Furthermore, the outer shell has a butterfly-shaped structure.

[0013] The beneficial effects of this utility model are: because a reinforcing cover is added to effectively limit the arching deformation of the cover plate, the butterfly-shaped optical device is suitable for vacuum environments, such as outer space and aerospace exploration, and the cover plate will not undergo large deformations that could lead to air leakage, thus not affecting the optical device encapsulated in the cover plate and the housing. The cover plate is made of lead, which can resist strong radiation from outer space. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a butterfly-shaped optical device in the prior art;

[0015] Figure 2 This is a structural diagram of the cover plate used in existing butterfly-shaped optical devices;

[0016] Figure 3 This is a structural diagram of the butterfly-shaped optical device for use in a vacuum environment according to this utility model;

[0017] Figure 4 This is a structural diagram of the reinforcing cover in this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Outer shell, 2. Cover plate, 3. Reinforcing cover, 310. Panel, 320. Protrusion, 4. Optical components. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] Example 1

[0022] like Figure 3 , Figure 4 As shown, a butterfly-shaped optical device for use in a vacuum environment includes:

[0023] The outer shell 1 and the cover plate 2 are used to seal the opening of the outer shell 1. The weak edges of the cover plate 2 are welded to the end face of the opening of the outer shell 1 in parallel to achieve a vacuum seal. The cover plate 2 has an inverted convex shape and its overall thickness is greater than 1.8mm, while the thickness of its edge touching the end face of the opening of the outer shell 1 is only 0.2mm±0.05mm. The inner cavity of the outer shell 1 is filled with dry nitrogen. This part of the structure is still consistent with the existing technology.

[0024] A reinforcing cover 3 is arranged on the side of the cover plate 2 away from the outer shell 1. The reinforcing cover 3 is used to effectively limit the arching deformation of the cover plate 2. The edges of the reinforcing cover 3 are fixed to the area of ​​the outer shell 1 that is not covered by the cover plate 2. Because of the addition of a reinforcing cover 3 to effectively limit the arching deformation of the cover plate 2, the butterfly-shaped optical device is suitable for vacuum environments, such as outer space and aerospace exploration, and the cover plate 2 will not undergo large deformation that would cause the cover plate 2 to leak air.

[0025] Example 2

[0026] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0027] The reinforcing cover 3 includes a panel 310, which is arranged on the side of the cover plate 2 away from the outer shell 1. The panel 310 has a protrusion 320 surrounding the cover plate 2 on the surface of the panel 310 adjacent to the cover plate 2. That is, the protrusion 320 is rectangular and the height of the protrusion 320 is higher than the weak edges of the cover plate 2. The protrusion 320 is welded to the area of ​​the open end face of the outer shell 1 that is not covered by the cover plate 2. The reinforcing cover 3 with this structure has no weak points and can effectively limit the arching deformation of the cover plate 2, so that the butterfly-shaped optical device is suitable for vacuum environments, such as outer space and aerospace exploration. The cover plate 2 will not undergo large deformation that would cause the cover plate 2 to leak air. The outer side of the protrusion 320 is preferably flush with the outer side of the outer shell 1.

[0028] Furthermore, the thickness of panel 310 is preferably greater than 1.27mm, and cover plate 2 contains lead material, which can resist strong radiation from outer space.

[0029] Example 3

[0030] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0031] Optical devices 4 are arranged inside the housing 1. The optical devices 4 fixed inside the housing 1 are consistent with the existing technology, so they are only briefly introduced here. They include: a tungsten copper base and a ceramic heat sink, lens, optical isolator and fiber optic tube fixed on the tungsten copper base. The laser chip is fixed on the ceramic heat sink. The bare optical fiber extends into the fiber optic tube. The light emitted by the laser chip passes through the lens and optical isolator in sequence and is coupled into the bare optical fiber.

[0032] The cover plate 2 is preferably made of Kovar, and the outer shell 1 has a butterfly-shaped structure.

[0033] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A butterfly optical device for a vacuum environment, comprising: The outer shell (1) and the cover plate (2) covering the opening of the outer shell (1), the periphery of the cover plate (2) is weakly welded with the end face of the opening end of the outer shell (1) to achieve a true airtight package, characterized in that a reinforcing cover (3) is arranged on the side of the cover plate (2) away from the outer shell (1) to effectively limit the arching deformation of the cover plate (2), and the periphery of the reinforcing cover (3) is fixed with the area of the end face of the opening end of the outer shell (1) not covered by the cover plate (2).

2. A butterfly optical device for vacuum environment according to claim 1, characterized in that, The reinforcing cover (3) comprises a face plate (310) provided with a protrusion (320) surrounding the cover plate (2), the height of the protrusion (320) is higher than the periphery of the cover plate (2), and the protrusion (320) is welded with the area of the end face of the opening end of the outer shell (1) not covered by the cover plate (2).

3. A butterfly optical device for vacuum environment according to claim 2, characterized in that, The thickness of the face plate (310) is greater than 1.27 mm.

4. A butterfly optical device for vacuum environment according to any one of claims 1 to 3, characterized in that, The cover plate (2) is made of lead-containing material.

5. The butterfly optical device for vacuum environment according to claim 1, wherein, The optical device (4) is arranged in the outer shell (1).

6. The butterfly optical device for vacuum environment according to claim 1, wherein, The cover plate (2) is made of Kovar cover plate.

7. The butterfly optical device for vacuum environment according to claim 1, wherein, The outer shell (1) is in a butterfly structure.

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