Optical cement positioning device for beam splitter prism

Abstract

The utility model provides an optical cement positioning device for a beam splitter prism, which is used for positioning and matching the inclined side surfaces of two right-angle prisms to form the beam splitter prism, and comprises a pressing assembly, an optical cement positioning assembly and an optical cement positioning assembly, the first split part is provided with a first V-shaped groove, and the first V-shaped groove is used for accommodating and positioning a rectangular prism; the second split part is provided with a second V-shaped groove, and the second V-shaped groove is used for accommodating and positioning the other rectangular prism; the first split part and the second split part are oppositely arranged on the pressing assembly, an opening of the first V-shaped groove right faces an opening of the second V-shaped groove, and the width of the opening of the first V-shaped groove and the width of the opening of the second V-shaped groove are both smaller than the size of the long side of the inclined side face of the rectangular prism. The first split part and the second split part are driven by the pressing assembly to be close to each other. The problems that in the prior art, the quality of optical cement of the produced beam splitter prism is uneven, and the size is prone to deviation are solved.

Description

Technical Field

[0001] The present application relates to the technical field of optical parts production tools, and more specifically, to an optical glue positioning device for a beam splitter prism. Background Art

[0002] Beam splitters are commonly used components in optical elements. For example, polarization beam splitters (PBS) are mainly used to separate S-polarized light and P-polarized light, and to split the non-polarized incident light into two perpendicular linear polarized light beams. The absorption of light is negligible. Two right-angle prisms are connected in the form of optical glue to form a beam splitter. Optical glue refers to the process of adsorbing two clean, smooth, and similar optical parts together with a little pressure without using adhesive. Glued beam splitters are usually made by gluing the inclined surfaces of two high-precision right-angle prisms together. A beam splitter film is coated on the inclined surface of one of the right-angle prisms to split a beam of incident light into two beams of light with perpendicular propagation directions according to a certain ratio.

[0003] The quality of the beam splitting surface in the beam splitting prism (PBS) directly determines the beam splitting quality of the PBS. However, in the prior art, an operator usually manually aligns two right-angle prisms side by side on a workbench and then performs optical bonding. Since the manual operation relies on personal experience to determine the product quality, the quality of the optical bonding of the beam splitting prism is often uneven, and it is even easy to cause misalignment and size deviation on the beam splitting surface.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] The purpose of the present application is to provide an optical glue positioning device for a beam splitter prism, which solves the problem that the optical glue of the beam splitter prism produced in the prior art has uneven quality and is prone to size deviation.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] The present application provides an optical glue positioning device for a beam splitter prism, which is used to position and match the oblique side surfaces of two right-angle prisms to form a beam splitter prism, wherein the optical glue positioning device includes: a pressing component;

[0008] A first split component, wherein a first V-shaped groove is provided on the first split component, and the first V-shaped groove is used to accommodate and position a right-angle prism;

[0009] A second split piece, the second split piece is provided with a second V-shaped groove, the second V-shaped groove is used to accommodate and position another right-angle prism;

[0010] The first split part and the second split part are arranged opposite to each other on the clamping assembly, and the opening of the first V-shaped groove is opposite to the opening of the second V-shaped groove. The opening width of the first V-shaped groove and the width of the opening of the second V-shaped groove are both smaller than the long side dimension of the oblique side surface of the right-angle prism. The first split part and the second split part are driven by the clamping assembly to approach each other.

[0011] In an optional embodiment, the first split component includes:

[0012] A first support body, the first support body having a first mounting surface;

[0013] Two first limit blocks, both of which have first limit inclined surfaces, are arranged side by side on the first mounting surface, and a first V-shaped groove is formed between the two first limit inclined surfaces.

[0014] In an optional embodiment, the two first limit blocks are arranged at intervals;

[0015] The spacing distance between the two side lines of the two first limiting blocks facing the first mounting surface is 1-5 mm.

[0016] In an optional embodiment, the first limit block is a right triangular prism, the angular accuracy of the right angle of the right triangular prism is not greater than 1 minute, and the parallelism of the oblique plane of the right triangular prism, the right angle surface of the right triangular prism and the first mounting surface is not greater than 1 minute.

[0017] In an optional embodiment, the second split component includes:

[0018] A second leaning body, the second leaning body having a second mounting surface;

[0019] A support body, the support body is vertically arranged on one side of the second mounting surface;

[0020] Two second limit blocks are arranged at intervals from the support body, both of the two second limit blocks have second limit inclined surfaces, and the two second limit blocks are arranged side by side on the second mounting surface, and a second V-shaped groove is formed between the two second limit inclined surfaces.

[0021] In an optional embodiment, the direction of relative movement between the first split member and the second split member is a pushing direction, and the length of the support body along the pushing direction is less than or equal to the diagonal length of the beam splitter prism.

[0022] In an optional embodiment, the clamping assembly includes: a seat body, on which a fixed portion and a movable portion are disposed opposite to each other, and a first split member and a second split member are disposed on the fixed portion and the movable portion respectively;

[0023] A threaded push rod, which is threadedly connected to the seat body and rotatably connected to the movable part, and the movable part is pushed by the threaded push rod to move toward or away from the fixed part;

[0024] The guide rail part is arranged on the movable part and is used for guiding the linear movement of the movable part.

[0025] In an optional embodiment, a baffle is provided on the fixed part, and vertical positioning angles are formed between the baffle and the fixed part and the movable part respectively, and the vertical positioning angles on both sides respectively limit the first split part and the second split part;

[0026] The angular bisector of the first V-shaped groove and the angular bisector of the second V-shaped groove both coincide with the central axis of the threaded push rod.

[0027] In an optional embodiment, the angular accuracy of the vertical positioning angle is no more than 10 seconds.

[0028] In an optional embodiment, the guide rail portion includes: a guide rail groove, the guide rail groove is provided on the seat body;

[0029] A guide boss, which is arranged on the movable part and movably embedded in the guide rail groove;

[0030] The positioning block is arranged at one end of the guide boss away from the movable part.

[0031] The beneficial effect of an optical glue positioning device for a beam splitter prism provided by the present application is at least that: in the process of optical gluing of two right-angle prisms, the two right-angle prisms are positioned respectively by the first split piece and the second split piece respectively arranged on the clamping assembly. The first split piece accommodates and positions one right-angle prism through the first V-shaped groove, and the second split piece accommodates and positions another right-angle prism through the second V-shaped groove. The opening of the first V-shaped groove is opposite to the opening of the second V-shaped groove. Then the first split piece and the second split piece are driven by the clamping assembly to approach each other, so that the oblique sides of the two right-angle prisms are aligned and pressed. The optical glue positioning device is used to assist in positioning during the optical gluing process, so that the two right-angle prisms are accurately aligned, and the beam splitter prism obtained after optical gluing can meet the quality requirements. Moreover, the optical glue positioning device of a unified standard is used to position the two right-angle prisms, and the size of the produced beam splitter prisms is uniform, the product quality is highly consistent, and the first-time qualified rate is very high, which greatly reduces the number of disassembly and rework times, thereby saving processing time and improving the production efficiency of the beam splitter prism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1Schematic diagram of the structure of the beam splitter prism;

[0034] Figure 2 A schematic structural diagram of the cooperation between a first split component and a second split component of an optical adhesive positioning device for a beam splitter prism provided in an embodiment of the present application;

[0035] Figure 3 A schematic structural diagram of a first split component of an optical adhesive positioning device for a beam splitter prism provided in an embodiment of the present application;

[0036] Figure 4 A schematic structural diagram of a second split component of an optical adhesive positioning device for a beam splitter prism provided in an embodiment of the present application;

[0037] Figure 5 A schematic structural diagram of an optical adhesive positioning device for a beam splitter prism provided in an embodiment of the present application in a use state;

[0038] Figure 6 A schematic diagram of the structure of a clamping assembly of an optical adhesive positioning device for a beam splitter prism provided in an embodiment of the present application;

[0039] Figure 7 A cross-sectional view of a clamping assembly of an optical adhesive positioning device for a beam splitter prism provided in an embodiment of the present application.

[0040] Among them, the reference numerals in the figure are:

[0041] 10. dichroic prism; 11. right-angle prism; 12. side bevel; 100. first split part; 110. first V-shaped groove; 120. first support body; 121. first mounting surface; 130. first limit block; 200. second split part; 210. second V-shaped groove; 220. second support body; 221. second mounting surface; 230. support body; 240. second limit block; 300. clamping assembly; 310. seat body; 311. fixed part; 312. movable part; 313. baffle; 320. threaded push rod; 321. handle; 330. guide rail part; 331. guide rail groove; 332. guide boss; 333. positioning block. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] In the prior art, the beam splitter produced by operators manually aligning right-angle prisms not only has poor product quality uniformity due to production experience problems, but also is prone to large dimensional deviations during the manual alignment process, resulting in low quality of the optical glue on the beam splitter surface; in addition, the manual alignment operation has low processing efficiency, and low processing accuracy often requires rework, which further reduces processing efficiency and affects production scheduling and delivery cycle. To solve the above problems, the present application proposes the following embodiments, which are as follows:

[0045] See also Figure 1 , Figure 2 This embodiment proposes an optical adhesive positioning device for a beam splitter prism, which is used to position and match the oblique side surfaces of two right-angle prisms 11, so that the two right-angle prisms 11 after positioning and matching form a beam splitter prism through optical adhesive. The right-angle prism 11 has two mutually perpendicular right-angled surfaces, a side oblique surface 12 opposite to the right angle, and side planes located on both sides of the thickness direction; the right-angled surface and the side oblique surface 12 form a right triangle, and the beam splitter prism to be produced in this embodiment is aligned and fixed by the side oblique surface 12 of the right-angle prism 11.

[0046] See also Figure 1 , Figure 2 , Figure 5The optical glue positioning device in this embodiment mainly includes: a clamping assembly 300, a first split component 100 and a second split component 200. The first split component 100 is provided with a first V-shaped groove 110, and the first V-shaped groove 110 is used to accommodate and position a right-angle prism 11. The two right-angled surfaces of a right-angle prism 11 respectively abut against the two side walls of the first V-shaped groove 110, so that the first right-angle prism 11 is limited by the first V-shaped groove 110. The second split component 200 is provided with a second V-shaped groove 210, and the second V-shaped groove 210 is used to accommodate and position another right-angle prism 11; the two right-angled surfaces of another right-angle prism 11 respectively abut against the two side walls of the second V-shaped groove 210, so that the second right-angle prism 11 is limited by the second V-shaped groove 210. The opening width of the first V-shaped groove 110 and the opening width of the second V-shaped groove 210 are both smaller than the long side dimension of the oblique side surface of the right angle prism 11, so that the side oblique surfaces of the right angle prism 11 on both sides protrude from the notch of the first V-shaped groove 110 and the notch of the second V-shaped groove 210 respectively. The first split part 100 and the second split part 200 are arranged opposite to each other on the clamping assembly 300, and the opening of the first V-shaped groove 110 is opposite to the opening of the second V-shaped groove 210, so that the side oblique surfaces of the first right angle prism 11 on one side and the second right angle prism 11 on the other side are opposite to each other and aligned. The first split part 100 and the second split part 200 are driven by the clamping assembly 300 to approach each other, and the first split part 100 and the second split part 200 that are approaching each other respectively drive the right angle prisms 11 on both sides to be pressed. When the optical glue is completed, the first split component 100 and the second split component 200 are driven away from each other by the pressing assembly 300, so as to remove the beam splitter prism. For the convenience of structural description, the direction in which the first split component 100 and the second split component 200 approach and move away from each other is the front-to-back direction, and the components in the positioning device are described in this direction as the standard.

[0047] The working principle of the optical glue positioning device for the beam splitter prism provided in this embodiment is as follows: two right-angle prisms 11 are positioned by the first split component 100 and the second split component 200 respectively arranged on the pressing assembly 300. The first split component 100 accommodates and positions one right-angle prism 11 through the first V-shaped groove 110, and the second split component 200 accommodates and positions the other right-angle prism 11 through the second V-shaped groove 210. The opening of the first V-shaped groove 110 faces the opening of the second V-shaped groove 210, so that the two right-angle prisms 11 are arranged opposite to each other, and the side inclined surfaces face and protrude from the openings of the first V-shaped groove 110 and the second V-shaped groove 210 respectively. Then, the first split component 100 and the second split component 200 are driven by the pressing assembly 300 to approach each other, so that the inclined sides of the two right-angle prisms 11 are aligned and pressed, so as to achieve accurate positioning during the optical glue process. The optical glue positioning device is used to assist in positioning during the optical glue process, so that the two right-angle prisms 11 are accurately aligned, and the beam splitter prism obtained after the optical glue can meet the quality requirements. In addition, the optical glue positioning device of a unified standard is used to position the two right-angle prisms 11, so that the size of the produced beam splitter prisms is uniform, the product quality is highly consistent, and the first-time qualified rate is very high, which greatly reduces the number of disassembly and rework times, thereby saving processing time and improving the production efficiency of the beam splitter prism.

[0048] See also Figure 2 , Figure 3 Furthermore, the first split component 100 in this embodiment specifically includes: a first support body 120 and two first limiting blocks 130. The first support body 120 can be a square plate and have a first mounting surface 121, and the first mounting surface 121 can be the front surface of the first support body 120. The two first limiting blocks 130 both have a first limiting inclined surface, and the two first limiting blocks 130 are arranged side by side on the first mounting surface 121 along the left-right direction, and a first V-shaped groove 110 is formed between the two first limiting inclined surfaces. The first limiting block 130 can be fixed on the first mounting surface 121 by glue spot gluing to achieve stable fixation, and the glue spot gluing setting can meet the positioning accuracy. The first V-shaped groove 110 is formed by splicing two first limiting blocks 130, and the size of the first V-shaped groove 110 can be adjusted by adjusting the two first limiting blocks 130, so as to facilitate the installation to form the first split component 100.

[0049] Furthermore, the two first limit blocks 130 in the present embodiment are spaced apart. By adopting the spaced apart arrangement, a gap can be formed between the two to avoid the edges of the two from touching and causing dimensional interference. The right-angled top of the right-angle prism 11 can also be spaced apart to avoid damaging the top angle, thereby effectively protecting the right-angle prism 11.

[0050] In this embodiment, the spacing distance between the two side lines of the two first limit blocks 130 facing the first mounting surface 121 is 1-5 mm. This size can be adapted to most common specifications of right-angle prisms 11, and has strong versatility.

[0051] Furthermore, the first limit block 130 in the present embodiment is a right-angled triangular prism, and the angular accuracy of the right angle of the right-angled triangular prism is not greater than 1 point; specifically: the dimensional tolerance of the right angle is + / -1 point. The parallelism of the inclined plane of the right-angled triangular prism, the right-angled surface of the right-angled triangular prism and the first mounting surface 121 is not greater than 1 point, that is, the deviation value of the inclined plane, the right-angled surface and the plane of the first mounting surface 121 relative to their various reference surfaces is 0°±1 point. The first limit block 130 is set as a right-angled triangular prism (such as a right-angle prism) to facilitate optical glue fixation with the first support body 120. In the production process, right-angled triangular prisms are used more frequently, and the processing technology is mature. They are commonly used optical parts with low cost. Therefore, the cost of the optical glue positioning device can be effectively reduced by setting the first limit block 130 as a right-angled triangular prism. In addition, by adopting the above-mentioned angles and planes with precision requirements, it can be ensured that the first split component 100 formed after assembly has high positioning accuracy for the right-angle prism 11, so that after the split prism is formed by optical glue, the precision of the split prism can be guaranteed to meet the product requirements.

[0052] See also Figure 2 , Figure 4 Furthermore, the second split component 200 in this embodiment specifically includes: a second leaning body 220, a supporting body 230 and two second limiting blocks 240. The second leaning body 220 has a second mounting surface 221, the supporting body 230 is vertically arranged on one side of the second mounting surface 221, the two second limiting blocks 240 are spaced apart from the supporting body 230, the two second limiting blocks 240 both have a second limiting inclined surface, the two second limiting blocks 240 are arranged side by side on the second mounting surface 221, and a second V-shaped groove 210 is formed between the two second limiting inclined surfaces. Compared with the first split component 100, the second split component 200 will have an additional supporting body 230 arranged below the two second limiting blocks 240, and the specific structural arrangement of the second limiting blocks 240 and the second leaning body 220 can refer to the structure of the first split component 100. The support body 230 is extended in the direction of the first support body 120. When the second split component 200 and the first split component 100 are relatively close to each other, the support body 230 can simultaneously support the first right-angle prism 11 in the first V-shaped groove 110 and the second right-angle prism 11 in the second V-shaped groove 210, so that the first right-angle prism 11 and the second right-angle prism 11 are limited in the vertical direction by the upper surface of the support body 230, and limited in the same plane, so that the two are aligned in the vertical direction.

[0053] Furthermore, in this embodiment, the direction of relative movement of the first split member 100 and the second split member 200 is the push direction, which is also the front-to-back direction, and the length of the support body 230 along the push direction is less than or equal to the diagonal length of the beam splitter prism. In this way, when the right-angle prisms 11 on both sides are squeezed, the support body 230 will not interfere, and the right-angle prisms 11 on both sides can be squeezed smoothly by the first split member 100 and the second split member 200.

[0054] See also Figure 2 , Figure 5 , Figure 6 Furthermore, the clamping assembly 300 in this embodiment specifically includes: a seat body 310, a threaded push rod 320 and a guide rail portion 330. The seat body 310 is provided with a fixed portion 311 and a movable portion 312 opposite to each other, the first split member 100 and the second split member 200 are respectively provided on the fixed portion 311 and the movable portion 312, the threaded push rod 320 is screwed on the seat body 310 and rotatably connected to the movable portion 312, and the other end of the threaded push rod 320 is provided with a handle 321, and when the handle 321 is rotated, the threaded push rod 320 drives the movable portion 312 to move on the guide rail portion 330. The movable portion 312 moves toward or away from the fixed portion 311 by being pushed by the threaded push rod 320. The guide rail portion 330 is provided on the movable portion 312 and is used to guide the linear movement of the movable portion 312. In the specific structure, the first split component 100 is fixedly arranged on the front surface of the movable part 312, and the second split component 200 is fixedly arranged on the rear surface of the fixed part 311. The threaded push rod 320 is rotated to make the movable part 312 move toward the second split component 200 in front under the guidance of the guide rail part 330, so that the first split component 100 pushes the first right-angle prism 11 to press against the second right-angle prism 11. When the threaded push rod 320 rotates and applies pressure, the two right-angle prisms 11 are aligned and pressed by positioning the first V-groove 110 and the second V-groove 210.

[0055] See also Figure 5 , Figure 6Furthermore, in this embodiment, a baffle plate 313 is provided on the fixed portion 311, and vertical positioning angles are formed between the baffle plate 313 and the fixed portion 311 and the movable portion 312, respectively. The vertical positioning angles on both sides limit the first split member 100 and the second split member 200. The baffle plate 313 is specifically fixed on the side surfaces in the left and right directions of the fixed portion 311, and extends a predetermined length in the front and rear directions, and can protrude to the rear of the front surface of the movable portion 312, so that vertical positioning angles are formed between the inner side surface of the baffle plate 313 and the rear surface of the fixed portion 311, and between the inner side surface of the baffle plate 313 and the front surface of the movable portion 312. The first split member 100 and the second split member 200 are limited in the left and right directions by the vertical positioning angles, so that the first split member 100 and the second split member 200 can be aligned when they are installed on the clamping assembly 300. The angular bisector of the first V-shaped groove 110 and the angular bisector of the second V-shaped groove 210 are both coincident with the central axis of the threaded push rod 320; thereby, the two right-angle prisms 11 are positioned and aligned, and the threaded push rod 320 is located in the middle position, so that the force applied by the threaded push rod 320 on the right-angle prisms 11 on both sides is more uniform. In the above structure, during the process of the pressing assembly 300 driving the first split component 100 and the second split component 200 to press the two right-angle prisms 11, the splitting surface of the splitting prism is evenly stressed, so that the bubbles in the bonding layer are discharged, ensuring that there are no bubbles in the bonding layer.

[0056] Furthermore, the angular accuracy of the vertical positioning angle in this embodiment is no more than 10 seconds, that is, the angle is 90°+ / -10 seconds. Thus, the flatness accuracy of the inner wall of the baffle 313 reaches the second level, and precise positioning is achieved entirely by the positioning accuracy of the inner wall of the baffle 313, and the center line of the threaded push rod 320 is ensured to coincide when the first split member 100 and the second split member 200 of the positioning assembly move along the center line of the threaded push rod 320.

[0057] See also Figure 6 , Figure 7 Furthermore, the guide rail portion 330 in this embodiment specifically includes: a guide rail groove 331, a guide boss 332 and a positioning block 333. The guide rail groove 331 is provided on the seat body 310, and the guide boss 332 is provided on the bottom of the movable portion 312 and penetrates into the guide rail groove 331, so that the boss 332 matches with the guide rail groove 331 to achieve guidance, and the two side surfaces of the guide rail groove 331 in the left and right directions are respectively contacted and limited with the guide boss 332 on the movable portion 312. The positioning block 333 is provided at one end of the guide boss 332 away from the movable portion 312, and is limited below the guide boss 332 to prevent the guide boss 332 from being separated from the guide rail groove 331, so as to achieve stable guidance during the movement of the movable portion 312.

[0058] In summary, the optical glue positioning device for a beam splitter prism proposed in this application can realize the gluing operation of two right-angle prisms to obtain a high-quality beam splitter prism (PBS) and ensure that the part size meets customer requirements. During the production process of the beam splitter prism, the two glued right-angle prisms are evenly stressed and the bubbles in the gluing layer are discharged to ensure that there are no bubbles in the gluing layer.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An optical adhesive positioning device for a beam splitter prism, used to position and match the oblique sides of two right-angle prisms to form a beam splitter prism, characterized in that: The optical adhesive positioning device comprises: a pressing component; A first split member, wherein a first V-shaped groove is provided on the first split member, and the first V-shaped groove is used to accommodate and position a right-angle prism; A second split member, wherein the second split member is provided with a second V-shaped groove, and the second V-shaped groove is used to accommodate and position another right-angle prism; The first split component and the second split component are arranged opposite to each other on the clamping assembly, and the opening of the first V-shaped groove is opposite to the opening of the second V-shaped groove. The opening width of the first V-shaped groove and the opening width of the second V-shaped groove are both smaller than the long side dimension of the oblique side surface of the right-angle prism. The first split component and the second split component are driven by the clamping assembly to approach each other.

2. The optical adhesive positioning device for a beam splitter prism according to claim 1, characterized in that: The first split component comprises: A first support body, wherein the first support body has a first mounting surface; Two first limit blocks, each of which has a first limit inclined surface, are arranged side by side on the first mounting surface, and the first V-shaped groove is formed between the two first limit inclined surfaces.

3. The optical adhesive positioning device for a beam splitter prism according to claim 2, characterized in that: The two first limit blocks are arranged at intervals; The spacing distance between the two side lines of the two first limiting blocks facing the first mounting surface is 1-5 mm.

4. The optical adhesive positioning device for a beam splitter prism according to claim 2, characterized in that: The first limit block is a right-angled triangular prism, the angular accuracy of the right angle of the right-angled triangular prism is not greater than 1 minute, and the parallelism of the inclined plane of the right-angled triangular prism, the right-angled surface of the right-angled triangular prism and the first mounting surface is not greater than 1 minute.

5. The optical adhesive positioning device for a beam splitter prism according to claim 1, characterized in that: The second split component comprises: A second support body, wherein the second support body has a second mounting surface; A support body, the support body being vertically arranged on one side of the second mounting surface; Two second limit blocks are arranged at intervals from the support body, and both of the two second limit blocks have second limit inclined surfaces. The two second limit blocks are arranged side by side on the second mounting surface, and the second V-shaped groove is formed between the two second limit inclined surfaces.

6. The optical adhesive positioning device for a beam splitter prism according to claim 5, characterized in that: The direction in which the first split component and the second split component move relative to each other is a pushing direction, and the length of the support body along the pushing direction is less than or equal to the diagonal length of the beam splitter prism.

7. The optical adhesive positioning device for a beam splitter prism according to any one of claims 1 to 6, characterized in that: The clamping assembly comprises: a seat body, on which a fixed portion and a movable portion are disposed opposite to each other, and the first split member and the second split member are disposed on the fixed portion and the movable portion respectively; A threaded push rod, the threaded push rod is threadedly connected to the seat body and rotatably connected to the movable part, and the movable part is pushed by the threaded push rod to move toward or away from the fixed part; A guide rail portion is arranged on the movable portion and is used for guiding the linear movement of the movable portion.

8. The optical adhesive positioning device for a beam splitter prism according to claim 7, characterized in that: The fixed part is provided with a baffle, and vertical positioning angles are formed between the baffle, the fixed part and the movable part respectively, and the vertical positioning angles on both sides respectively limit the first split part and the second split part; The angular bisector of the first V-shaped groove and the angular bisector of the second V-shaped groove both coincide with the central axis of the threaded push rod.

9. The optical adhesive positioning device for a beam splitter prism according to claim 8, characterized in that: The angular accuracy of the vertical positioning angle is no more than 10 seconds.

10. The optical adhesive positioning device for a beam splitter prism according to claim 7, characterized in that: The guide rail portion includes: a guide rail groove, the guide rail groove is arranged on the seat body; A guide boss, which is arranged on the movable portion and movably embedded in the guide rail groove; A positioning block is arranged at an end of the guide boss away from the movable part.

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