Gluing positioning tool for polarization splitting prism

Abstract

The utility model relates to the technical field of optical part processing, and provides a gluing positioning tool for a polarization splitting prism, and the tool comprises a pedestal which is provided with a supporting plane; the first leaning body comprises a first end face and a second end face, the first end face is attached to the supporting plane, and the second end face is perpendicular to the supporting plane; the second leaning body comprises a third end face and a fourth end face, the third end face is attached to the supporting plane, and the fourth end face is perpendicular to the supporting plane and parallel to the second end face; the third leaning body comprises a fifth end face and a sixth end face, the fifth end face is attached to the supporting plane and located between the second end face and the fourth end face, and the sixth end face is perpendicular to the supporting plane, the second end face and the fourth end face. When the gluing positioning tool is used for gluing the polarization splitting prism, the second end face and the fourth end face can abut against the first right-angle prism and the second right-angle prism, the size precision of the first right-angle prism and the second right-angle prism after butt joint is improved, and the yield of glued products is improved.

Description

Technical Field

[0001] This application relates to the technical field of optical part processing, and more specifically, to a gluing and positioning tooling for a polarization beam splitting prism. Background Art

[0002] A polarization beam splitting prism is formed by coating a multilayer film structure on the inclined surface of a right-angle prism, and then gluing two right-angle prisms into a cube structure for separating the horizontal polarization and vertical polarization of a beam of light. When gluing a polarization beam splitting prism, it is necessary to ensure high-precision positioning and stable processing quality during the gluing process to meet the strict requirements of optical components for precise alignment and gluing strength.

[0003] The existing gluing method relies on manual operation to tightly press two right-angle prisms together, but the one-time qualification rate of this method is relatively low. When the accuracy does not meet the requirements, it needs to be repaired, disassembled, and reglued, resulting in part scrapping.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Utility Model

[0005] The purpose of this application is to provide a gluing and positioning tooling for a polarization beam splitting prism to solve the technical problem of low gluing accuracy of the polarization beam splitting prism in the existing technology.

[0006] To achieve the above purpose, the technical solution adopted by this application is: to provide a gluing and positioning tooling for a polarization beam splitting prism, including:

[0007] A base provided with a supporting plane;

[0008] A first abutting body including a first end face and a second end face, the first end face being attached to the supporting plane, and the second end face being perpendicular to the supporting plane;

[0009] A second abutting body including a third end face and a fourth end face, the third end face being attached to the supporting plane, and the fourth end face being perpendicular to the supporting plane and parallel to the second end face;

[0010] A third abutting body including a fifth end face and a sixth end face, the fifth end face being attached to the supporting plane and located between the second end face and the fourth end face, and the sixth end face being perpendicular to the supporting plane, the second end face, and the fourth end face.

[0011] Further, the polarization beam splitting prism includes a first right-angle prism and a second right-angle prism. The second end face, the fourth end face, and the supporting plane enclose a gluing channel for the first right-angle prism and the second right-angle prism to tightly fit and slide, and the sixth end face is used to abut against the first right-angle prism.

[0012] Furthermore, tape layers are adhered to the second end face and the fourth end face.

[0013] In some embodiments, a lubricating layer is provided on the supporting plane between the second end face and the fourth end face.

[0014] Furthermore, a first chamfer is provided at the junction of the first end face and the second end face, a second chamfer is provided at the junction of the third end face and the fourth end face, and the supporting plane respectively encloses a first inverted groove and a second inverted groove with the first chamfer and the second chamfer.

[0015] In some embodiments, a third chamfer is provided at the junction of the fifth end face and the sixth end face, and the supporting plane encloses a third inverted groove with the third chamfer.

[0016] Furthermore, the first chamfer, the second chamfer and the third chamfer are all not less than 0.5 millimeters.

[0017] In some embodiments, the flatness of the second end face, the fourth end face, the sixth end face and the supporting plane is all less than 0.005 millimeters.

[0018] Furthermore, the chassis, the first supporting body, the second supporting body and the third supporting body are all of cuboid structures.

[0019] In some embodiments, the first supporting body, the second supporting body and the third supporting body are all detachably connected to the supporting plane by optical cementing or gluing.

[0020] The beneficial effects of the gluing positioning tooling for a polarization beam splitting prism provided by this application are at least as follows: When gluing the polarization beam splitting prism through the gluing positioning tooling, the second end face and the fourth end face can abut against the first right-angle prism and the second right-angle prism, and the first right-angle prism and the second right-angle prism will slide in the gluing channel formed by the first supporting body and the second supporting body in a predetermined direction, improving the dimensional accuracy after the docking of the first right-angle prism and the second right-angle prism. Gluing the polarization beam splitting prism through the gluing positioning tooling can reduce the probability of dimensional deviation after the docking of the right-angle prisms, greatly improving the one-time qualification rate of gluing. The qualification rate of gluing reaches 95%, improving the product yield, and it is convenient to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Schematic diagram of the gluing and positioning tooling for a polarization beam splitting prism provided by an embodiment of the present application;

[0023] Figure 2 is Figure 1 Schematic diagram of the gluing and positioning tooling for a polarization beam splitting prism in another perspective in ;

[0024] Figure 3 Schematic diagram when the third abutting body provided by an embodiment of the present application is arranged on the base;

[0025] Figure 4 Schematic diagram of the third abutting body provided by an embodiment of the present application;

[0026] Figure 5 Schematic diagram when the first right-angle prism provided by an embodiment of the present application is on the gluing and positioning tooling;

[0027] Figure 6 Schematic diagram when the first right-angle prism and the second right-angle prism provided by an embodiment of the present application are on the gluing and positioning tooling.

[0028] Among them, each reference numeral in the figure:

[0029] 1. Base; 11. Support plane;

[0030] 2. First abutting body; 21. First end face; 22. Second end face;

[0031] 3. Second abutting body; 31. Third end face; 32. Fourth end face;

[0032] 4. Third abutting body; 41. Fifth end face; 42. Sixth end face;

[0033] 5. Gluing channel;

[0034] 6. Tape layer;

[0035] 7. First chamfer; 71. First chamfer groove;

[0036] 8. Second chamfer; 81. Second chamfer groove;

[0037] 9. Third chamfer; 91. Third chamfer groove;

[0038] 10. First right-angle prism; 101. Second right-angle prism. Specific embodiments

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application more clearly understood, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0040] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positions shown in the accompanying drawings, and are only for the convenience of description and cannot be construed as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenient description and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0041] The polarization beam splitter prism is formed by gluing two right-angle prisms through their hypotenuses to form a cubic structure. On the hypotenuse of one of the prisms, one or more layers of special polarization beam splitting dielectric films are deposited. This thin film is the key, and it can achieve selective transmission and reflection according to the characteristics of light with different polarization directions (P-polarized light and S-polarized light). P-polarized light (polarized light with the vibration direction parallel to the incident plane) can be transmitted through, while S-polarized light (polarized light with the vibration direction perpendicular to the incident plane) is effectively reflected.

[0042] It can be seen that the design and manufacture of the polarization beam splitter prism is a highly precise process aimed at achieving efficient polarization separation of incident light. Therefore, the gluing between the two prisms needs to be completed through precise alignment and firm gluing processes to ensure the accuracy of the optical path and long-term stability.

[0043] However, the existing gluing method relies on manual operation to tightly press the two right-angle prisms. The one-time qualification rate of this method is relatively low. When the accuracy does not meet the requirements, it needs to be repaired, disassembled, and re-glued, which will cause the parts to be scrapped.

[0044] The following describes the gluing and positioning tooling for the polarization beam splitter prism according to the embodiments of this application in conjunction with the accompanying drawings.

[0045] Please refer to Figure 1 and Figure 2 , which shows the structural schematic diagram of the gluing and positioning tooling for the polarization beam splitter prism of this application. The gluing and positioning tooling includes a base 1 and a first abutting body 2, a second abutting body, and a third abutting body 43 disposed on the base 1.

[0046] Specifically, the base 1 is provided with a support plane 11. The first abutting body 2 includes a first end face 21 and a second end face 22. The first end face 21 is attached to the support plane 11, and the second end face 22 is perpendicular to the support plane 11. The second abutting body includes a third end face 31 and a fourth end face 32. The third end face 31 is attached to the support plane 11, and the fourth end face 32 is perpendicular to the support plane 11 and parallel to the second end face 22. The third abutting body 43 includes a fifth end face 41 and a sixth end face 42. The fifth end face 41 is attached to the support plane 11 and is located between the second end face 22 and the fourth end face 32. The sixth end face 42 is perpendicular to the support plane 11, the second end face 22, and the fourth end face 32.

[0047] The gluing and positioning tooling is assembled by the base 1, the first abutting body 2, the second abutting body, and the third abutting body 43. During assembly, first, each end face of the support plane 11, the first abutting body 2, the second abutting body, and the third abutting body 43 is cleaned to make the accuracy higher when they are assembled and pressed tightly. Then, the first end face 21 of the first abutting body 2 is attached to the support plane 11, making the second end face 22 perpendicular to the support plane 11. Then, the third end face 31 of the second abutting body is attached to the support plane 11, making the second abutting body arranged at an interval from the first abutting body 2, and making the fourth end face 32 face the second end face 22 and be parallel to the second end face 22. Finally, the third abutting body 43 is placed between the intervals of the first abutting body 2 and the second abutting body, and the fifth end face 41 of the third abutting body 43 is attached to the support plane 11, keeping the sixth end face 42 perpendicular to the support plane 11, and at the same time making the sixth end face 42 perpendicular to the second end face 22 and the fourth end face 32.

[0048] After the assembly is completed, the gluing of the polarization beam splitter prism is started. In some embodiments, the polarization beam splitter prism includes a first right-angle prism 10 and a second right-angle prism 101. The second end face 22, the fourth end face 32, and the support plane 11 enclose a gluing channel 5 for the first right-angle prism 10 and the second right-angle prism 101 to be attached and slide tightly. The sixth end face 42 is used to abut against the first right-angle prism 10.

[0049] Further, the first right-angle prism 10 and the second right-angle prism 101 are right-angle prisms with the same size and shape, both having two right-angle faces, two side faces, and one inclined face. By attaching the inclined faces of the two right-angle prisms, a cubic polarization beam splitter prism is formed. When assembling the gluing and positioning tooling, first determine the length w of the right-angle faces of the first right-angle prism 10 and the second right-angle prism 101, and then set the distance between the second end face 22 and the fourth end face 32 to be the same as the above length w.

[0050] Thus, when gluing the polarization beam splitter prism, refer to Figures 1 - 5, first, attach one side surface of the first right-angle prism 10 to the gluing channel 5, and at the same time make one right-angle surface fit against the second end face 22. At this time, the other right-angle surface is still perpendicular to the support plane 11, the second end face 22, and the fourth end face 32, and the intersection of the other right-angle surface and the inclined surface abuts against the fourth end face 32. Then, push the first right-angle prism 10 towards the third abutting body 43 until the other right-angle surface abuts against the sixth end face 42. Refer to Figure 6 , then place the second right-angle prism 101 symmetrically into the gluing channel 5 in a similar placement manner as the first right-angle prism 10, with the inclined surface of the second right-angle prism 101 facing the inclined surface of the first right-angle prism 10. Then, push the second right-angle prism 101 until the inclined surface of the second right-angle prism 101 abuts against the inclined surface of the first right-angle prism 10. At this time, the first right-angle prism 10 and the second right-angle prism 101 are combined to form a cube-shaped polarization beam splitter prism.

[0051] It can be found that when gluing the polarization beam splitter prism through the gluing positioning tooling, the second end face 22 and the fourth end face 32 always abut against the first right-angle prism 10 and the second right-angle prism 101. Therefore, the first right-angle prism 10 and the second right-angle prism 101 will slide in the gluing channel 5 formed by the first abutting body 2 and the second abutting body in a predetermined direction, improving the dimensional accuracy of the first right-angle prism 10 and the second right-angle prism 101 after docking. Gluing the polarization beam splitter prism through the gluing positioning tooling can reduce the probability of dimensional deviation after the right-angle prisms are butted, greatly improving the one-time qualification rate of gluing. The gluing qualification rate reaches 95%, improving the product yield, and it is also convenient to disassemble.

[0052] Furthermore, after the first abutting body 2, the second abutting body, and the third abutting body 43 are fitted, they are all fixed on the support plane 11 by gluing. Among them, gluing means applying a curing adhesive on the first end face 21, the third end face 31, and the fifth end face 41, and fixing the first abutting body 2, the second abutting body, and the third abutting body 43 on the support plane 11 through the curing adhesive.

[0053] Furthermore, refer to Figure 2 , and a tape layer 6 is bonded on the second end face 22 and the fourth end face 32.

[0054] When gluing the polarization beam splitter prism, the second end face 22 of the first abutting body 2 and the fourth end face 32 of the second abutting body will always abut against the first right-angle prism 10 and the second right-angle prism 101. To avoid the first abutting body 2 and the second abutting body from scratching the first right-angle prism 10 and the second right-angle prism 101, a tape layer 6 is bonded on the second end face 22 and the fourth end face 32. The tape layer 6 includes a base material and an adhesive surface bonded together. The adhesive surface is bonded to the second end face 22 and the fourth end face 32, and the base material is exposed, which is used to buffer and prevent scratching of the right-angle prism.

[0055] Exemplarily, the base material can be a foamed cotton layer, which is relatively soft, has good sealing and buffering properties, and will not scratch the right-angle prism.

[0056] In some embodiments, for the convenience of pushing the first right-angle prism 10 and the second right-angle prism 101 out of the gluing and positioning tooling, a lubricating layer is provided on the supporting plane 11 between the second end face 22 and the fourth end face 32.

[0057] Among them, the lubricating layer (not shown in the figure) is a solid glue layer coated on the supporting plane 11, which is used to reduce the friction between the right-angle prism and the supporting plane 11, and the gluing and positioning tooling provides a smoother installation space for the first right-angle prism 10 and the second right-angle prism 101, making the gluing process of the polarization beam splitter prism more convenient.

[0058] Furthermore, the lubricating layer includes any one or a combination of a graphite resin composite layer, a molybdenum disulfide resin composite layer, and a PTFE resin composite layer, and the lubricating layer also includes a vaseline layer.

[0059] Of course, the lubricating layer can also be provided on the surface of the tape layer 6.

[0060] In some embodiments, referring to Figure 2 , a first chamfer 7 is provided at the junction of the first end face 21 and the second end face 22, a second chamfer 8 is provided at the junction of the third end face 31 and the fourth end face 32, and the supporting plane 11 respectively encloses a first inverted groove 71 and a second inverted groove 81 with the first chamfer 7 and the second chamfer 8.

[0061] It can be understood that the first abutting body 2 and the second abutting body are coated with curing glue. When being glued and fixed on the supporting plane 11, the curing glue is easily extruded from the edge of the contact surface, which will cause the curing glue to remain on the supporting plane 11 of the gluing channel 5. When gluing the polarization beam splitter prism, the curing glue is easily bonded and cured on the surface of the right-angle prism, affecting the gluing accuracy.

[0062] After the first chamfer 7 and the second chamfer 8 are provided, even if the curing glue is extruded, it will preferentially remain in the first inverted groove 71 and the second inverted groove 81, reducing the risk of the curing glue remaining on the supporting plane 11 of the gluing channel 5, and also reducing the risk of the polarization beam splitter prism contacting the curing glue during the gluing process, thereby improving the gluing accuracy.

[0063] Moreover, even if the curing glue is extruded onto the supporting plane 11 of the gluing channel 5, through wiping, even if it cannot be completely cleaned, the curing glue can be pushed into the first inverted groove 71 and the second inverted groove 81, achieving the effect of keeping the supporting plane 11 of the gluing channel 5 clean.

[0064] Furthermore, referring to Figure 3 and Figure 4, a third chamfer 9 is provided at the junction of the fifth end face 41 and the sixth end face 42, and a third chamfer groove 91 is formed by enclosing the support plane 11 and the third chamfer 9.

[0065] Similar to the first chamfer 7 and the second chamfer 8, when the third abutting body 43 is glued to the support plane 11, the problem of cured glue extrusion may also occur. Through the provided third chamfer 9, even if the cured glue is extruded, it will preferentially remain in the third chamfer groove 91, reducing the risk of the cured glue remaining on the support plane 11 of the gluing channel 5, and also reducing the risk of the polarization beam splitter prism contacting the cured glue during the gluing process, thereby improving the gluing accuracy.

[0066] Furthermore, to enable the first chamfer groove 71, the second chamfer groove 81, and the third chamfer groove 91 to have sufficient space to accommodate the cured glue, the first chamfer 7, the second chamfer 8, and the third chamfer 9 are all not less than 0.5 millimeters.

[0067] It can be understood that the chamfer refers to the inclined plane formed by rounding the right angle of the part. When it is mentioned that the first chamfer 7, the second chamfer 8, and the third chamfer 9 are not less than 0.5 millimeters, this means that during the part design or manufacturing process, the width of the inclined plane (the distance from the vertical edge to the widest part of the newly formed inclined plane) of the edge to be rounded should be at least 0.5 millimeters.

[0068] If the chamfer is set too small, the cured glue is likely to overflow from the chamfer groove. Setting the chamfer not less than 0.5 millimeters can ensure that the chamfer groove can fully accommodate the cured glue and prevent the cured glue from overflowing onto the support plane 11 of the gluing channel 5.

[0069] Furthermore, to ensure the accuracy of the gluing process, the flatness of the second end face 22, the fourth end face 32, the sixth end face 42, and the support plane 11 is all less than 0.005 millimeters.

[0070] It can be understood that flatness refers to the degree of approximation of a surface to an ideal plane state, which is used to describe the deviation of the actual surface from the theoretical perfect plane. Since the ideal plane is without unevenness or bending, but in fact, there will always be a certain degree of unevenness on the surface of the manufactured parts, and high-precision alignment and positioning are required when gluing the polarization beam splitter prism. Therefore, it is necessary to ensure that the flatness of the contact surface reaches a certain level.

[0071] In this embodiment, by setting the flatness of the second end face 22, the fourth end face 32, the sixth end face 42, and the support plane 11 in contact with the polarization beam splitter prism to be all less than 0.005 millimeters, the precise alignment of the polarization beam splitter prism during the gluing process can be improved, the situation of offset and misalignment during the gluing process can be reduced, and the gluing accuracy and gluing quality can be improved.

[0072] In some embodiments, the chassis, the first support body 2, the second support body, and the third support body 43 are all cuboid structures.

[0073] It can be understood that for the cuboid first support body 2, second support body, and third support body 43, the adjacent side faces are all right angles. When assembling the gluing and positioning tooling, the positioning and installation of the first support body 2, second support body, and third support body 43 are more convenient, improving the assembly portability of the gluing and positioning tooling itself.

[0074] Of course, the first support body 2, second support body, and third support body 43 can also be other structures, such as a right prism. The first end face 21 and the second end face 22 are two mutually perpendicular surfaces on the first support body 2. Similarly, the third end face 31 and the fourth end face 32 are two mutually perpendicular surfaces on the second support body, and the fifth end face 41 and the sixth end face 42 are two mutually perpendicular surfaces on the third support body 43.

[0075] Furthermore, the first support body 2, second support body, and third support body 43 are all detachably connected to the support plane 11 by optical gluing or gluing. Among them, the optical gluing method means that optical gluing refers to a process in which two clean, smooth, and surface-shaped optical parts are adsorbed together with a little pressure without using an adhesive. That is to say, in addition to gluing through a cured adhesive, the first support body 2, second support body, and third support body 43 can also be fixed to the support plane 11 by optical gluing.

[0076] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gluing and positioning tool for a polarization beam splitter prism, characterized in that: include: A base having a support surface; A first support body, comprising a first end surface and a second end surface, wherein the first end surface is attached to the support plane, and the second end surface is perpendicular to the support plane; A second support body, comprising a third end face and a fourth end face, wherein the third end face is attached to the support plane, and the fourth end face is perpendicular to the support plane and parallel to the second end face; The third support body includes a fifth end face and a sixth end face, wherein the fifth end face is attached to the support plane and is located between the second end face and the fourth end face, and the sixth end face is perpendicular to the support plane, the second end face and the fourth end face.

2. The gluing and positioning tool for polarization beam splitting prism according to claim 1, characterized in that: The polarization beam splitter prism includes a first right-angle prism and a second right-angle prism. The second end face, the fourth end face and the support plane form a gluing channel for the first right-angle prism and the second right-angle prism to slide closely together. The sixth end face is used to stop the first right-angle prism.

3. The gluing and positioning tool for polarization beam splitting prism according to claim 2, characterized in that: The second end surface and the fourth end surface are bonded with adhesive tape layers.

4. The gluing and positioning tool for polarization beam splitting prism according to claim 2, characterized in that: A lubricating layer is provided on the supporting plane between the second end surface and the fourth end surface.

5. The gluing and positioning tool for polarization beam splitting prism according to claim 2, characterized in that: A first chamfer is provided at the intersection of the first end face and the second end face, a second chamfer is provided at the intersection of the third end face and the fourth end face, and the support plane is respectively surrounded by the first chamfer and the second chamfer to form a first inverted groove and a second inverted groove.

6. The gluing and positioning tool for polarization beam splitting prism according to claim 5, characterized in that: A third chamfer is provided at the intersection of the fifth end face and the sixth end face, and the support plane and the third chamfer are arranged to form a third inverted groove.

7. The gluing and positioning tool for polarization beam splitting prism according to claim 6, characterized in that: The first chamfer, the second chamfer and the third chamfer are all not less than 0.5 mm.

8. The gluing and positioning tool for polarization beam splitting prism according to claim 1, characterized in that: The flatness of the second end face, the fourth end face, the sixth end face and the supporting plane is less than 0.005 mm.

9. The gluing and positioning tool for polarization beam splitting prism according to claim 1, characterized in that: The base, the first support body, the second support body and the third support body are all rectangular parallelepiped structures.

10. The gluing and positioning tool for polarization beam splitting prism according to claim 1, characterized in that: The first support body, the second support body and the third support body are all detachably connected to the support plane by optical glue or gluing.

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