Optical observation grid plate

Abstract

The utility model discloses an optical observation grid plate, which is used for observing a flow field and comprises a substrate and optical glass. The substrate comprises a first surface and a second surface opposite to the first surface, the substrate is provided with a mounting groove, the mounting groove penetrates through the substrate and is connected with the first surface and the second surface, and the second surface is arranged close to a flow field; the optical glass comprises a third surface and a fourth surface connected with the third surface, the third surface is arranged close to the second surface, an angle is formed between the third surface and the fourth surface, the third surface is used for transmitting light, the third surface and the second surface are coplanar, and the fourth surface is attached to the wall surface of the mounting groove. As the third surface and the second surface are coplanar, the substrate and the optical glass are accurately matched, and the third surface and the second surface form a smooth surface, so that the problem that the optical glass protrudes out of the surface of the substrate is effectively avoided, the interference of the optical glass on a flow field is reduced, and the experiment reliability can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical equipment, in particular to an optical observation grid plate. Background Art

[0002] In high-speed flow field observation experiments, it is of great significance to accurately obtain flow field data. In order to achieve this goal, an optical observation window is usually required to observe the situation inside the flow field. In related technologies, the optical observation window uses a flange structure to fix the optical glass on the substrate. However, due to the processing errors of both the substrate and the optical glass, the optical glass may protrude from the surface of the substrate, thereby interfering with the flow field and affecting the reliability of the experimental results. Utility Model Content

[0003] The utility model provides an optical observation grid plate.

[0004] The optical observation grid plate of the utility model is used for observing the flow field, and the optical observation grid plate comprises:

[0005] A substrate, the substrate comprising a first surface and a second surface opposite to the first surface, the substrate having a mounting groove, the mounting groove penetrating the substrate and connecting the first surface and the second surface, the second surface being arranged close to the flow field;

[0006] Optical glass, the optical glass includes a third surface and a fourth surface connected to the third surface, the third surface is arranged close to the second surface, there is an angle between the third surface and the fourth surface, the third surface is used to transmit light, the third surface is coplanar with the second surface, and the fourth surface is in contact with the wall of the mounting groove.

[0007] In the optical observation grid plate of the embodiment of the utility model, since the third surface is coplanar with the second surface, the substrate and the optical glass are precisely matched, and the third surface of the optical glass and the second surface of the substrate form a smooth surface, which effectively avoids the problem of the optical glass protruding from the substrate surface, thereby reducing the interference of the optical glass on the flow field, thereby improving the reliability of the experiment. In addition, the fourth surface of the optical glass is closely matched with the wall of the mounting groove, which improves the connection strength between the optical glass and the substrate, thereby improving the service life of the optical glass.

[0008] In certain embodiments, the angle between the third surface and the fourth surface is an acute angle.

[0009] In certain embodiments, the angle between the third surface and the fourth surface is in the range of (90°, 120°).

[0010] In some embodiments, the optical observation grid further includes a glass cover plate, wherein the glass cover plate is connected to the substrate, and the glass cover plate has a first through groove, wherein the first through groove is used for the light to be incident on the optical glass.

[0011] In some embodiments, the optical observation grating also includes a gasket, which is arranged between the first surface of the substrate and the glass cover plate, the gasket is in contact with the first surface of the substrate, the gasket connects the substrate and the glass cover plate, and the gasket has a second through groove, and the second through groove is used for the light to be incident on the optical glass.

[0012] In some embodiments, the gasket includes a first connecting portion, the substrate includes a second connecting portion, and the glass cover includes a third connecting portion, and the first connecting portion, the second connecting portion, and the third connecting portion are detachably connected.

[0013] In some embodiments, the sizes of the mounting slot, the first through slot, and the second through slot are substantially the same.

[0014] In some embodiments, the substrate further includes a thickened plate, the orthographic projection area of ​​the thickened plate is smaller than the orthographic projection area of ​​the substrate, the thickened plate protrudes from the first surface, the mounting groove passes through the thickened plate, and the fourth surface is in contact with the wall of the mounting groove.

[0015] In some embodiments, the cross section of the substrate is a circular ring, the notch of the mounting groove is circular, the optical glass is truncated cone-shaped, and the fourth surface of the optical glass is in contact with the wall of the mounting groove.

[0016] In some embodiments, a filler is provided between the wall surface of the mounting groove and the optical glass, and the filler is used to adjust the degree of fit between the fourth surface of the optical glass and the wall surface of the mounting groove.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of an optical observation grid plate according to one embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of an assembly structure of a substrate and optical glass according to an embodiment of the utility model;

[0021] Figure 3 It is a schematic structural diagram of an optical glass according to one embodiment of the utility model;

[0022] Figure 4 It is a disassembled schematic diagram of an assembly structure of a substrate and optical glass according to an embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of an assembly structure of a substrate and optical glass according to one embodiment of the utility model.

[0024] Description of reference numerals:

[0025] Optical observation grid 100; substrate 10; first surface 11; second surface 12; mounting groove 13; optical glass 20; third surface 21; fourth surface 22; wall surface 130 of mounting groove; glass cover 30; first through groove 31; gasket 40; second through groove 41; first connecting portion 42; second connecting portion 14; third connecting portion 32; thickened plate 15. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0031] See also Figure 1 and Figure 2 The optical observation grid plate 100 of the utility model is used for observing the flow field, and the optical observation grid plate 100 includes a substrate 10 and an optical glass 20. The substrate 10 includes a first surface 11 and a second surface 12 opposite to the first surface 11, and the substrate 10 has a mounting groove 13, the mounting groove 13 penetrates the substrate 10 and connects the first surface 11 and the second surface 12, and the second surface 12 is arranged near the flow field; the optical glass 20 includes a third surface 21 and a fourth surface 22 connected to the third surface 21, the third surface 21 is arranged near the second surface 12, and there is an angle between the third surface 21 and the fourth surface 22, the third surface 21 is used to transmit light, the third surface 21 and the second surface 12 are coplanar, and the fourth surface 22 is in contact with the wall 130 of the mounting groove 13.

[0032] In the optical observation grid plate 100 of the embodiment of the utility model, since the third surface 21 and the second surface 12 are coplanar, the substrate 10 and the optical glass 20 are precisely matched, and the third surface 21 of the optical glass 20 and the second surface 12 of the substrate 10 form a smooth surface, which effectively avoids the problem of the optical glass 20 protruding from the surface of the substrate 10, thereby reducing the interference of the optical glass 20 on the flow field, thereby improving the reliability of the experiment. In addition, the fourth surface 22 of the optical glass 20 is closely matched with the wall of the mounting groove 13, which improves the connection strength between the optical glass 20 and the substrate 10, thereby improving the service life of the optical glass 20.

[0033] Specifically, in high-speed flow field observation experiments, the optical observation grid 100 is used to provide a transparent window, allowing the internal conditions of the flow field, such as fluid velocity, pressure, temperature distribution, etc., to be observed and analyzed by optical means (such as lasers, cameras, etc.).

[0034] The substrate 10 is a structure for mounting the optical glass 20. The shape of the substrate 10 can be a regular shape such as a circle or a square, or an irregular shape. The mounting groove 13 is a through groove provided on the substrate 10 for providing a mounting space. The mounting groove 13 can have different shapes, such as a rectangle, a circle or an ellipse, etc., to accommodate different types of optical glass 20 and assembly requirements. The optical glass 20 can be disposed in the mounting groove 13, and the optical glass 20 and the substrate 10 can be connected by mortise and tenon joints through the mounting groove 13.

[0035] The optical glass 20 can be a high-transmittance optical glass 20 for laboratory use, and the light transmittance of the high-transmittance optical glass 20 can be above 90%. Of course, a suitable high-transmittance optical glass 20 can be selected according to the needs. In the flow field observation experiment, there is a high-speed flow field in the experimental chamber and there is a large pressure difference between the inside and outside of the experimental chamber, so the optical glass 20 needs to have a certain thickness to withstand the pressure.

[0036] The second surface 12 is located on the side of the substrate 10 close to the flow field, and the third surface 21 is located on the side of the optical glass 20 close to the second surface 12. When observing the flow field, the high-speed flow field will contact the second surface 12 and the second surface 12. Since it is necessary to observe various parameters of the flow field, after the optical glass 20 and the substrate 10 are assembled, the third surface 21 of the optical glass 20 and the second surface 12 of the substrate 10 need to be kept smooth to avoid disturbance of the flow field itself, thereby affecting the observation result of the flow field.

[0037] In the related art, due to the problem of processing accuracy, the optical glass 20 may have a processing error. Therefore, after the optical glass 20 is installed in the mounting groove 13, the optical glass 20 may protrude from the substrate 10. For example, the third surface 21 of the optical glass 20 is parallel to the first surface 11 of the substrate 10 but not parallel to the second surface 12 of the substrate 10, which will cause the optical glass 20 to disturb the flow field itself. It can be understood that keeping the third surface 21 of the optical glass 20 coplanar with the second surface 12 of the substrate 10 can prevent the optical glass 20 from causing disturbances to the flow field itself.

[0038] In one embodiment, in order to keep the third surface 21 of the optical glass 20 coplanar with the second surface 12 of the substrate 10, the surfaces of the assembled substrate 10 and the optical glass 20 can be finely polished to eliminate tiny protrusions or depressions to ensure that the third surface 21 and the second surface 12 can reach a coplanar state after assembly.

[0039] In another embodiment, a filler is disposed between the wall surface 130 of the mounting groove 13 and the optical glass 20 , and the filler is used to adjust the degree of fit between the fourth surface 22 of the optical glass 20 and the wall surface 130 of the mounting groove 13 .

[0040] In this way, when the optical glass 20 has a processing error, the filler can adjust the degree of fit between the fourth surface 22 of the optical glass 20 and the wall surface 130 of the mounting groove 13, so that the position of the optical glass 20 can be adjusted to compensate for the dimensional deviation that may occur in the optical glass 20 during the processing, so that the third surface 21 of the optical glass 20 can be coplanar with the second surface 12. The use of the filler is low in cost, simple and easy, and does not require additional processing of the substrate 10 and the optical glass 20, thereby avoiding damage to the substrate 10 and the optical glass 20.

[0041] The filler may be rubber, copper foil, etc. In the process of assembling the substrate 10 and the optical glass 20, a filler may be arranged between the wall surface 130 of the mounting groove 13 and the optical glass 20, and the filler may fine-tune the position of the optical glass 20, so that even if there is a processing error in the optical glass 20, the third surface 21 and the second surface 12 can be coplanar.

[0042] See also Figure 3 In some embodiments, the angle R between the third surface 21 and the fourth surface 22 is an acute angle.

[0043] Thus, the fourth surface 22 of the optical glass 20 is designed to form an acute angle bevel with the third surface 21. The bevel reduces the probability that the third surface 21 protrudes from the second surface 12 due to the processing error of the substrate 10 and the optical glass 20, thereby reducing the interference of the optical glass 20 on the flow field, thereby improving the reliability of the experimental results. In addition, in the high-speed flow field observation experiment, the third surface 21 of the optical glass 20 will be subjected to a large pressure. The existence of the bevel increases the contact area between the substrate 10 and the optical glass 20, thereby reducing the pressure, thereby improving the service life of the optical glass 20.

[0044] Specifically, the angle R between the third surface 21 and the fourth surface 22 refers to the angle between the third surface 21 and the fourth surface 22. The wall surface 130 of the mounting groove 13 can be tilted to match the optical glass 20 with a beveled surface. It can be understood that after the optical glass 20 is installed in the mounting groove 13, if the angle between the third surface 21 and the fourth surface 22 is a right angle, the edge of the optical glass 20 will form a hard boundary with the mounting groove 13 of the substrate 10, which limits the adjustable range of the optical glass 20 in the mounting groove 13, because the right-angle edge is not easy to fine-tune. However, if the angle between the third surface 21 and the fourth surface 22 is an acute angle, the angle between the optical glass 20 and the substrate 10 can be adjusted by setting a filler and adjusting the shape, position or quantity of the filler, so that the third surface 21 is coplanar with the second surface 12.

[0045] See also Figure 3 In some embodiments, the angle R between the third surface 21 and the fourth surface 22 is in the range of (90°, 120°). For example, the angle R between the third surface 21 and the fourth surface 22 may be in the range of (90°, 115°), (95°, 110°), (100°, 105°), (102°, 103°), (104°, 120°), etc. The angle R between the third surface 21 and the fourth surface 22 may be 91°, 95°, 100°, 105°, 115°, etc.

[0046] Within this angle range, a more uniform pressure distribution is formed between the optical glass 20 and the wall 130 of the mounting groove 13, thereby improving the pressure bearing capacity and stability of the optical glass 20, and enabling the optical glass 20 to maintain stable operation under high-speed flow fields and large pressure difference conditions.

[0047] See also Figure 1 In some embodiments, the optical observation grid 100 further includes a glass cover plate 30 , which is connected to the substrate 10 , and has a first through groove 31 , which is used for light to be incident on the optical glass 20 .

[0048] In this way, the glass cover 30 can fix the substrate 10 and the optical glass 20, thereby reducing the probability of the glass being disturbed due to excessive pressure difference, thereby ensuring the stability of flow field observation. In addition, the glass cover 30 can reduce the probability of external objects directly contacting the surface of the optical glass 20, thereby avoiding scratches or contamination of the optical glass 20.

[0049] Specifically, the glass cover plate 30 can be connected to the substrate 10 by connecting parts such as bolts and pins, and the glass cover plate 30 can cover the optical glass 20. The glass cover plate 30 is used to protect the optical glass 20 and prevent external factors from damaging the optical glass 20. The first through groove 31 is a through groove opened on the glass cover plate 30, and the first through groove 31 can provide a transparent observation window for observing the flow field. The glass cover plate 30 can be selected from tempered glass, organic glass or special coated glass to improve its durability, anti-reflection and transparency.

[0050] The shape and size of the first through slot 31 can be set according to requirements, such as a regular shape such as a rectangle, a circle or an ellipse, or an irregular shape.

[0051] See also Figure 1 In some embodiments, the optical observation grid 100 also includes a gasket 40, which is disposed between the first surface 11 of the substrate 10 and the glass cover plate 30, and the gasket 40 is in contact with the first surface 11 of the substrate 10, and the gasket 40 connects the substrate 10 and the glass cover plate 30, and the gasket 40 has a second through groove 41, and the second through groove 41 is used for allowing light to be incident on the optical glass 20.

[0052] Thus, the gasket 40 can provide a buffer, reducing the probability of deformation and wear caused by direct connection between the glass cover plate 30 and the substrate 10. In addition, the gasket 40 can provide additional support and connection, enhance the structural stability between the substrate 10 and the glass cover plate 30, and ensure the reliability and durability of the optical observation grid plate 100 under high-speed flow fields and large pressure difference conditions.

[0053] Specifically, the second through groove 41 is a through groove opened on the gasket 40, and the second through groove 41 can provide a transparent observation window for observing the flow field. The number of gaskets 40 can be one or more. The material of the gasket 40 can be selected according to demand, such as rubber, plastic, metal or composite material.

[0054] See also Figure 1 In some embodiments, the gasket 40 includes a first connecting portion 42, the substrate 10 includes a second connecting portion 14, and the glass cover 30 includes a third connecting portion 32. The first connecting portion 42, the second connecting portion 14, and the third connecting portion 32 are detachably connected.

[0055] In this way, the detachable connection design makes the connection and disassembly between the gasket 40, the substrate 10 and the glass cover 30 more convenient and quick, which is convenient for daily maintenance, cleaning and replacement, and reduces maintenance costs and time.

[0056] Specifically, the substrate 10, the gasket 40 and the glass cover plate 30 can be stacked in sequence. The first connection portion 42 of the gasket 40, the second connection portion 14 of the substrate 10 and the third connection portion 32 of the glass cover plate 30 can all be provided with threaded holes, and bolts or screws are provided to achieve detachable connection between the first connection portion 42, the second connection portion 14 and the third connection portion 32. Among them, the first connection portion 42, the second connection portion 14 and the third connection portion 32 can be arranged relative to each other, for example, the axes of the threaded holes on each part can be collinear.

[0057] See also Figure 1 In some embodiments, the sizes of the slots of the mounting slot 13, the first through slot 31, and the second through slot 41 are substantially the same. Light can pass through the first through slot 31, the second through slot 41, and the mounting slot 13 in sequence.

[0058] In this way, the consistency of the slot sizes helps to ensure that the propagation characteristics of the light remain consistent when passing through each slot, thereby ensuring the uniformity and stability of the light incident on the optical glass 20 and improving the accuracy of the observation results.

[0059] In addition, the uniform slot size helps to improve the accuracy during the assembly process and ensure the matching and compatibility between the various components, thereby improving the performance and reliability of the entire optical observation grid plate 100.

[0060] See also Figure 1 In some embodiments, the substrate 10 also includes a thickened plate 15, the orthographic projection area of ​​the thickened plate 15 is smaller than the orthographic projection area of ​​the substrate 10, the thickened plate 15 protrudes from the first surface 11, the mounting groove 13 passes through the thickened plate 15, and the fourth surface 22 is in contact with the wall 130 of the mounting groove 13.

[0061] In this way, the provision of the thickened plate 15 enables the substrate 10 to match the installation requirements of the optical glass 20 without increasing its overall thickness, thereby reducing the use of materials and lowering the manufacturing cost.

[0062] Specifically, the thickened plate 15 is used to provide additional installation space so that the substrate 10 can match the thicker optical glass 20. The thickened plate 15 can be integrally formed with other parts of the substrate 10, or can be separately formed with other parts of the substrate 10. The projection line of the orthographic projection of the thickened plate 15 can be the same as the projection line of the orthographic projection of the substrate 10. The orthographic projection area of ​​the substrate 10 refers to the orthographic projection of the projection line perpendicular to the first surface 11.

[0063] See also Figure 4 and Figure 5 In some embodiments, the cross section of the substrate 10 is a ring, the notch of the mounting groove 13 is circular, the optical glass 20 is truncated cone-shaped, and the fourth surface 22 of the optical glass 20 is in contact with the wall 130 of the mounting groove 13.

[0064] Thus, the circular notch design helps light to pass through the optical glass 20 in a more uniform manner, reducing light loss and distortion during the passage process, thereby improving the data accuracy of the observed flow field. The annular substrate 10 and the circular notch are easy to realize through machining or casting processes, which helps to reduce manufacturing costs and improve production efficiency.

[0065] Specifically, the substrate 10 may be cylindrical, and a mounting groove 13 may be provided in the middle of the substrate 10. The mounting groove 13 may be a circular through groove that penetrates the cylinder and connects the first surface 11 and the second surface 12 of the substrate 10. The mounting groove 13 has two notches connected to the first surface 11 and the second surface 12, and both notches are circular. Among them, the notch located on the first surface 11 is larger than the notch located on the second surface 12, and the distance between the walls between the two notches gradually decreases from the notch located on the first surface 11 to the notch located on the second surface 12. Along the direction approaching the flow field, the cross-sectional area of ​​the optical glass 20 gradually decreases. The fourth surface 22 of the optical glass 20 is the outer peripheral surface of the optical glass 20. After the truncated cone-shaped optical glass 20 is installed in the mounting groove 13, the outer peripheral surface of the optical glass 20 fits with the wall surface 130 of the mounting groove 13.

[0066] A filler may be provided between the truncated cone-shaped optical glass 20 and the wall surface 130 of the mounting groove 13, which can reduce the probability that the third surface 21 protrudes from the second surface 12 due to the processing error of the substrate 10 and the optical glass 20, thereby reducing the interference of the optical glass 20 on the flow field, thereby improving the reliability of the experimental results. In addition, in the high-speed flow field observation experiment, the third surface 21 of the optical glass 20 will be subjected to a large pressure, and the contact area between the truncated cone-shaped optical glass 20 and the wall surface 130 of the mounting groove 13 is increased, thereby reducing the pressure, thereby improving the service life of the optical glass 20.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An optical observation grid plate for observing a flow field, characterized in that: The optical observation grid comprises: A substrate, the substrate comprising a first surface and a second surface opposite to the first surface, the substrate having a mounting groove, the mounting groove penetrating the substrate and connecting the first surface and the second surface, the second surface being arranged close to the flow field; Optical glass, the optical glass includes a third surface and a fourth surface connected to the third surface, the third surface is arranged close to the second surface, there is an angle between the third surface and the fourth surface, the third surface is used to transmit light, the third surface is coplanar with the second surface, and the fourth surface is in contact with the wall of the mounting groove.

2. The optical observation grid according to claim 1, characterized in that: An angle between the third surface and the fourth surface is an acute angle.

3. The optical observation grid according to claim 2, characterized in that: The angle between the third surface and the fourth surface is in the range of (90°, 120°).

4. The optical observation grid according to claim 1, characterized in that: The optical observation grid plate further comprises a glass cover plate, wherein the glass cover plate is connected to the substrate, and the glass cover plate has a first through groove, wherein the first through groove is used for the light to be incident on the optical glass.

5. The optical observation grid according to claim 4, characterized in that: The optical observation grating also includes a gasket, which is arranged between the first surface of the substrate and the glass cover plate, the gasket is in contact with the first surface of the substrate, the gasket connects the substrate and the glass cover plate, and the gasket has a second through groove, and the second through groove is used for the light to be incident on the optical glass.

6. The optical observation grid according to claim 5, characterized in that: The gasket includes a first connecting portion, the substrate includes a second connecting portion, and the glass cover includes a third connecting portion, and the first connecting portion, the second connecting portion, and the third connecting portion are detachably connected.

7. The optical observation grid according to claim 5, characterized in that: The sizes of the installation slot, the first through slot and the second through slot are substantially the same.

8. The optical observation grid according to claim 1, characterized in that: The substrate further includes a thickened plate, the orthographic projection area of ​​the thickened plate is smaller than the orthographic projection area of ​​the substrate, the thickened plate protrudes from the first surface, the mounting groove passes through the thickened plate, and the fourth surface is in contact with the wall of the mounting groove.

9. The optical observation grid according to claim 1, characterized in that: The cross section of the substrate is a circular ring, the notch of the mounting groove is circular, the optical glass is in a truncated cone shape, and the fourth surface of the optical glass is in contact with the wall surface of the mounting groove.

10. The optical observation grid according to claim 1, characterized in that: A filler is provided between the wall surface of the mounting groove and the optical glass, and the filler is used to adjust the degree of fit between the fourth surface of the optical glass and the wall surface of the mounting groove.

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