Butterfly-shaped optical device for high-pressure environment

Abstract

The utility model relates to a butterfly-shaped optical device used in a high-pressure environment, which comprises a shell with an opening at the upper end and a cover plate covered in the opening of the shell, the cover plate is of an inverted trapezoidal platform structure, and inclined chamfers which are inclined downwards from outside to inside are arranged between the upper surface of the shell and the inner wall surface of each side of the shell. The inclined side face of the cover plate is attached to the inclined chamfer of the shell, the upper surface of the cover plate is 0.1 mm-0. 3mm higher than the upper surface of the shell, and the area, higher than the shell, of the cover plate is sealed with the shell through parallel seal welding. The butterfly-shaped optical device has the beneficial effects that the cover plate has no weak part, and the shell can effectively support the cover plate with the inverted trapezoidal table structure, so that the butterfly-shaped optical device is suitable for a high-air-pressure environment, the cover plate does not deform, and the cover plate and the optical device packaged in the shell are not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly-shaped optical devices, and in particular to a butterfly-shaped optical device used in a high-pressure environment. Background Art

[0002] In the traditional butterfly optical device, the cover plate and the shell are sealed by parallel sealing welding, and the cover plate and the shell are filled with dry nitrogen at standard atmospheric pressure. The principle is to use resistance welding to melt the cover plate and the shell for bonding and sealing. The upper surface of the cover plate is 0.1mm to 0.3mm higher than the upper surface of the shell. If the height of the upper surface of the cover plate is less than 0.1mm higher than the upper surface of the shell, it is impossible to ensure that the airtightness is qualified after the cover plate is melted by resistance welding. If the height of the upper surface of the cover plate is greater than 0.3mm higher than the upper surface of the shell, it is too thick and it is difficult to melt the cover plate by resistance welding. The cover plate used is an inverted convex structure with an overall thickness greater than 1.8mm, and the thickness of its edge on the upper surface of the shell is only 0.2mm±0.05mm. Figure 1 and Figure 2 As shown, since the cover and the outer shell are clearance-fitted, there is a weak spot of 0.2mm±0.05mm. When the butterfly-shaped optical device is used in a high-pressure environment, such as military industry, deep sea, aerospace exploration, etc., the external high pressure will generate pressure, causing the weak spot of the cover to deform, thereby affecting the cover and the optical devices packaged in the outer shell. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a butterfly-shaped optical device for use in a high-pressure environment, so as to overcome the deficiencies in the above-mentioned prior art.

[0004] The utility model provides a technical solution for solving the above-mentioned technical problems as follows: a butterfly-shaped optical device for use in a high-pressure environment, comprising: a shell with an opening at the upper end and a cover plate connected to the opening of the shell, the cover plate being an inverted trapezoidal platform structure, and the shell is provided with an oblique chamfer inclined downward from the outside to the inside between its upper surface and the inner wall surface on each side, the oblique side surface of the cover plate is attached to the oblique chamfer of the shell, the upper surface of the cover plate is 0.1mm to 0.3mm higher than the upper surface of the shell, and the area where the cover plate is higher than the shell is sealed with the shell by parallel sealing welding.

[0005] On the basis of the above technical solution, the present invention can also be improved as follows.

[0006] Furthermore, the inclination angle of each oblique side surface of the cover plate is 30°±5°, and the corresponding chamfers below each oblique side surface of the cover plate are parallel to the oblique side surface.

[0007] Furthermore, the upper surface of the cover plate is 0.2 mm±0.05 mm higher than the upper surface of the housing.

[0008] Furthermore, the thickness of the cover plate is greater than 1.8 mm.

[0009] Furthermore, the cover plate adopts a kovable cover plate.

[0010] Furthermore, the outer shell is a butterfly-shaped structure.

[0011] Furthermore, an optical device is fixed in the housing.

[0012] The beneficial effect of the utility model is that since the cover plate has no weak points and the shell can effectively support the cover plate of the inverted trapezoidal platform structure, the butterfly-shaped optical device is suitable for high-pressure environments, and the cover plate will not deform, thereby not affecting the cover plate and the optical devices packaged in the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of a butterfly optical device in the prior art;

[0014] Figure 2 This is a structural diagram of a cover plate used in a butterfly-shaped optical device in the prior art;

[0015] Figure 3 This is a structural diagram of a butterfly-shaped optical device used in a high-pressure environment in the utility model;

[0016] Figure 4 This is a structural diagram of the butterfly-shaped optical device used in a high-pressure environment in the present invention after the cover plate is removed.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Cover plate, 2. Shell, 210. Bevel chamfer. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] Example 1

[0021] like Figure 3 , Figure 4As shown, a butterfly-shaped optical device for high-pressure environment comprises: a cover plate 1 and a shell 2, the upper end of the shell 2 is open, and the cover plate 1 is connected to the opening of the shell 2. In this embodiment, the cover plate 1 is an inverted trapezoidal structure, which can be understood as the transverse cross-section of the cover plate 1 is an inverted trapezoid, and the longitudinal cross-section is also an inverted trapezoid. The shell 2 is provided with an oblique chamfer 210 that is inclined downward from the outside to the inside between its upper surface and the inner wall surface on each side, and the oblique side surface of the cover plate 1 is attached to the oblique chamfer 210 of the shell 2. The upper surface of the cover plate 1 is 0.1mm to 0.3mm higher than the upper surface of the shell 2. If the upper surface of the cover plate 1 is higher than the upper surface of the shell 2 by less than 0.1mm, it is impossible to ensure that the airtightness of the cover plate 1 is qualified after the resistance welding melts the cover plate 1; if the upper surface of the cover plate 1 is higher than the upper surface of the shell 2 by more than 0.3mm, it is too thick and it is difficult to melt the cover plate 1 by resistance welding; the area where the cover plate 1 is higher than the shell 2 is sealed with the shell 2 by parallel sealing welding;

[0022] Since the cover plate 1 has no weak points and the housing 2 can effectively support the cover plate 1 of the inverted trapezoidal structure, the butterfly-shaped optical device is suitable for high-pressure environments, and the cover plate will not deform, thereby not affecting the cover plate and the optical devices packaged in the housing.

[0023] Example 2

[0024] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0025] The inclination angle of each oblique side surface of the cover plate 1 is 30°±5°, and the corresponding chamfer 210 below each oblique side surface of the cover plate 1 is parallel to the oblique side surface, that is, it is understood that the inclination angle of the corresponding chamfer 210 below each oblique side surface of the cover plate 1 is also 30°±5°.

[0026] The upper surface of the cover plate 1 is preferably 0.2mm±0.05mm higher than the upper surface of the shell 2, and the thickness of the cover plate 1 is preferably greater than 1.8mm. The cover plate 1 adopts a Kovar cover plate 1. In addition, the shell 2 is a butterfly structure, and an optical device is fixed in the shell 2. The optical device fixed in the shell 2 is the same as the prior art, so it is only briefly introduced here, including: a tungsten copper base and a ceramic heat sink, a lens, an optical isolator and an optical fiber tube fixed on the tungsten copper base. The laser chip is fixed on the ceramic heat sink, and the bare optical fiber of the optical fiber extends into the optical fiber tube. The light emitted by the laser chip is coupled into the bare optical fiber through the lens and the optical isolator in sequence.

[0027] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A butterfly-shaped optical device for use in a high pressure environment, comprising: A shell (2) with an opening at the top and a cover plate (1) covering the opening of the shell (2), characterized in that the cover plate (1) is an inverted trapezoidal structure, and the shell (2) is provided with an oblique chamfer (210) inclined downward from the outside to the inside between its upper surface and the inner wall surface on each side, the oblique side surface of the cover plate (1) is in contact with the oblique chamfer (210) of the shell (2), the upper surface of the cover plate (1) is 0.1 mm to 0.3 mm higher than the upper surface of the shell (2), and the area where the cover plate (1) is higher than the shell (2) is sealed with the shell (2) by parallel sealing.

2. A butterfly-shaped optical device for use in a high pressure environment according to claim 1, characterized in that: The inclination angle of each oblique side surface of the cover plate (1) is 30°±5°, and the oblique chamfer (210) corresponding to the lower side of each oblique side surface of the cover plate (1) is parallel to the oblique side surface.

3. The butterfly-shaped optical device for use in a high pressure environment according to claim 1, characterized in that: The upper surface of the cover plate (1) is 0.2 mm±0.05 mm higher than the upper surface of the outer shell (2).

4. The butterfly-shaped optical device for use in a high pressure environment according to claim 1, characterized in that: The thickness of the cover plate (1) is greater than 1.8 mm.

5. The butterfly-shaped optical device for use in a high pressure environment according to claim 1, characterized in that: The cover plate (1) is a Koval cover plate.

6. The butterfly-shaped optical device for use in a high pressure environment according to claim 1, characterized in that: The housing (2) is a butterfly-shaped structure.

7. A butterfly-shaped optical device for use in a high pressure environment according to any one of claims 1 to 6, characterized in that: An optical device is fixed inside the housing (2).

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