A beam splitter prism

Abstract

The utility model discloses a kind of light splitting prisms, it is related to the technical field of light splitting prisms, including mirror body and the convex ring being located at the both ends of mirror body, the inside and outside wall of the convex ring is equipped with staggered distribution's locating groove;Through outer constraint ring is equipped in the outside of convex ring, and the inner plug post extending to the inside of convex ring is equipped on the mounting plate connected with outer constraint ring;The outer constraint ring and the inner plug post are all equipped with elastic reset's card ball, when the convex ring is embedded between the annular gap of outer constraint ring and inner plug post, inside and outside card ball is engaged in the locating groove of the inside and outside wall of convex ring respectively, form bilateral mechanical self-locking structure;The structure is realized the radial and axial multi-degree-of-freedom constraint of light splitting prism by standardization interface, complete quick assembly and disassembly under the condition of not needing tool, and through the precision cooperation of locating groove and card ball ensure the repeated accuracy of optical axis position after the replacement of different models prism, effectively solve the problem that traditional clamping piece is poor in adaptability and needs recalibration after replacement.

Description

Technical Field

[0001] This utility model relates to the field of beam splitter technology, and in particular to a beam splitter. Background Technology

[0002] A beam splitter is an optical element that can split an incident beam into two or more beams of light that propagate in different directions according to a specific ratio. It is widely used in optical instruments and scientific research experiments.

[0003] The beam splitter itself is made of a single piece of high-transparency glass. During use, additional clamps are required to restrict the position of the beam splitter. However, in actual use, such as scientific research experiments and optical equipment with different needs, beam splitters are frequently changed to cope with different usage scenarios. However, different models of beam splitters have different end face shapes, and conventional clamps cannot be adapted to different types of beam splitters. Changing the clamps may cause the installation position of the beam splitter to change, and the user needs to recalibrate the placement to ensure the accuracy of the beam splitter. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a beam splitter that solves the problem of needing to adapt the beam splitter to different clamping components when replacing it during use, and the need for repeated calibration during the adaptation process, which affects the efficiency of use.

[0005] The technical solution of this utility model is as follows: it includes a mirror body, and convex rings are respectively provided at both ends of the mirror body. The inner sidewall and the outer sidewall of the convex ring are provided with positioning grooves that are evenly spaced, wherein the positioning grooves of the inner sidewall and the outer sidewall of the convex ring are interleaved. An outer constraint ring is fitted on the outside of the convex ring. A mounting plate is provided on the side of the outer constraint ring away from the mirror body. An inner plug is provided on the surface of the mounting plate, which is concentric with the outer constraint ring. The inner plug extends into the convex ring. An installation groove is provided on the side of the inner plug and outer constraint ring near the positioning groove on the surface of the convex ring. A spring is provided inside the installation groove, and a retaining ball is provided at the end of the spring.

[0006] Furthermore, the positioning groove is a hemispherical groove adapted to the ball. The positioning groove is specifically constructed as a hemispherical groove that precisely matches the curvature of the ball surface. This shape design ensures that the ball forms a stable support with multiple points of contact when it is embedded in the positioning groove. The hemispherical structure facilitates the ball to slide quickly into or out of the positioning groove under the action of spring thrust, realizing a smooth operation of prism installation and disassembly.

[0007] Furthermore, the flow domain between the outer constraint ring and the inner plug is adapted to the annular gap of the convex ring. The edge of the convex ring near the outer constraint ring and the inner plug is provided with a smooth chamfer. The outer constraint ring and the inner plug together define an annular space that matches the gap of the outer contour of the convex ring. The width tolerance of the annular gap is strictly controlled to allow the convex ring to be smoothly inserted. At the same time, the end edge of the convex ring near the constraint assembly is machined with a continuous and smooth arc transition chamfer. This chamfer structure guides the convex ring to smoothly enter the annular gap during prism installation and eliminates stress concentration points that may be generated when the prism glass comes into contact with the metal parts, protecting the mirror body from mechanical damage.

[0008] Furthermore, the mounting plate has a connector on the side facing away from the convex ring. The mounting plate has a circular plate structure. The mounting plate integrates a standardized connector for docking with external equipment on the surface facing away from the convex ring. The connector may include threaded holes, pin holes or quick-release interfaces. The mounting plate adopts a circular plate structure with high flatness. Its geometric center coincides with the axis of the outer constraint ring and the inner plug. This symmetrical design facilitates rapid positioning and installation with the optical platform or equipment base through rotation alignment.

[0009] Furthermore, the two ends of the spring are respectively connected to the inner wall of the mounting groove and the retaining ball. The spring is always in a relaxed state, pushing the retaining ball towards the open end of the mounting groove. The spring acts as a pre-tightening element, with one end fixedly connected to the inner wall of the closed end of the mounting groove, and the other end directly acting on the back of the retaining ball. The spring always maintains a pre-compression amount in its natural state, thereby pushing the retaining ball towards the open end of the mounting groove through continuous elastic restoring force, ensuring that the retaining ball always has the tendency to protrude from the outer surface of the mounting groove to embed into the positioning groove, forming a self-locking effect.

[0010] Furthermore, the mounting groove is a tubular groove, with the diameter of the opening end of the mounting groove being smaller than the inner diameter. The diameter of the opening end of the mounting groove is such that the ball cannot be dislodged and can only extend outward. The mounting groove is designed as a tubular blind hole structure with a constant inner diameter. The orifice area near the opening end is formed by a diameter reduction process to create a constricted section with an inner diameter smaller than the diameter of the ball. The orifice size of this constricted section is precisely set to allow part of the ball crown to protrude from the tube opening under the spring thrust to achieve the positioning function, while physically preventing the ball from being completely dislodged from the mounting groove, thus forming an anti-dislodgement limiting structure.

[0011] Furthermore, the length of the mounting groove is twice the diameter of the ball retainer. This specific length relationship ensures that the spring has sufficient compression stroke within the mounting groove to provide a stable preload, while limiting the axial movement range of the ball retainer within the mounting groove. This prevents spring instability or ball retainer tilting due to excessive displacement, ensuring the reliability of the positioning mechanism during long-term use.

[0012] The beneficial effects of this utility model are as follows: This invention significantly improves the flexibility and efficiency of optical system maintenance by integrating standardized convex ring positioning structures at both ends of the mirror body and designing a constraint component with a ball-locking positioning mechanism. When it is necessary to replace different models of beam splitters, the operator does not need to change the clamping device. Simply align the convex ring of the new prism with the annular gap of the constraint component, and the spring-driven ball will automatically embed into the positioning slot to complete the installation. This solves the problem that traditional clamping components cannot adapt to the diverse end face shapes of prisms. Furthermore, the high-precision slot matching ensures the high consistency of the optical axis position after prism replacement, greatly reducing the positional offset caused by disassembly and reassembly, thereby effectively avoiding the cumbersome recalibration process. It is especially suitable for scientific research experiments or precision equipment scenarios that require frequent switching of optical components. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the convex ring structure of this utility model; Figure 3 This is a schematic diagram of the outer constraint ring and inner plug structure of this utility model; Figure 4 This is a cross-sectional schematic diagram of the outer constraint ring and inner plug structure of this utility model.

[0014] Reference numerals in the attached drawings: 1. Mirror body; 2. Convex ring; 3. Positioning groove; 4. Outer constraint ring; 5. Mounting plate; 6. Inner plug; 7. Mounting groove; 8. Spring; 9. Ball catcher. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] like Figure 1-4 As shown, a beam splitter includes a mirror body 1, with convex rings 2 respectively provided at both ends of the mirror body 1. The inner and outer walls of the convex rings 2 are provided with positioning grooves 3 evenly spaced, wherein the positioning grooves 3 on the inner and outer walls of the convex rings 2 are interleaved. An outer constraint ring 4 is fitted on the outer side of the convex ring 2. A mounting plate 5 is provided on the side of the outer constraint ring 4 away from the mirror body 1. A connector is provided on the side of the mounting plate 5 facing away from the convex ring 2. The mounting plate 5 has a circular plate structure. The mounting plate 5 has a standardized connector for docking with external equipment integrated on the surface facing away from the convex ring 2. The connector may include a threaded hole, a pin hole or a quick-release interface. The mounting plate 5 adopts a circular plate structure with high flatness. Its geometric center coincides with the axis of the outer constraint ring 4 and the inner plug 6. This symmetrical design facilitates quick positioning and installation with the optical platform or equipment base by rotation alignment. The surface of the mounting plate 5 is provided with an inner plug 6 concentric with the outer constraint ring 4. The inner plug 6 extends into the convex ring 2. The flow area between the outer constraint ring 4 and the inner plug 6 is an annular gap that matches the convex ring 2. The edge of the convex ring 2 near the outer constraint ring 4 and the inner plug 6 is provided with a smooth chamfer. The outer constraint ring 4 and the inner plug 6 together define an annular space that matches the outer contour gap of the convex ring 2. The width tolerance of the annular gap is strictly controlled to allow the convex ring 2 to be smoothly inserted. At the same time, the end edge of the convex ring 2 near the constraint assembly is machined with a continuous and smooth arc transition chamfer. This chamfer structure guides the convex ring 2 to smoothly enter the annular gap during prism installation and eliminates stress concentration points that may be generated when the prism glass comes into contact with the metal parts, protecting the mirror body 1 from mechanical damage. An installation groove 7 is formed on the side of the inner plug 6 and the outer constraint ring 4 near the positioning groove 3 on the surface of the convex ring 2. A spring 8 is installed inside the installation groove 7, and a retaining ball 9 is provided at the end of the spring 8. The positioning groove 3 is a hemispherical groove adapted to the retaining ball 9. The positioning groove 3 is specifically constructed as a hemispherical groove that precisely matches the curvature of the surface of the retaining ball 9. This shape design ensures that the retaining ball 9 forms a stable support with multi-point contact when it is embedded in the positioning groove 3. The hemispherical structure facilitates the quick sliding of the retaining ball 9 into or out of the positioning groove 3 under the thrust of the spring 8, realizing a smooth operation for prism installation and removal. The two ends of the spring 8 are respectively connected to the inner wall of the mounting groove 7 and the retaining ball 9. The spring 8 is always in a relaxed state, pushing the retaining ball 9 towards the open end of the mounting groove 7. As a pre-tightening element, one end of the spring 8 is fixedly connected to the inner wall of the closed end of the mounting groove 7, and the other end acts directly on the back of the retaining ball 9. The spring 8 always maintains the pre-compression amount in its natural state, thereby pushing the retaining ball 9 towards the open end of the mounting groove 7 through continuous elastic restoring force, ensuring that the retaining ball 9 always has the tendency to protrude from the outer surface of the mounting groove 7 to embed into the positioning groove 3, forming a self-locking effect. The length of the mounting groove 7 is twice the diameter of the ball catcher 9. This specific length relationship ensures that the spring 8 has sufficient compression stroke within the mounting groove 7 to provide stable preload, while limiting the axial movement range of the ball catcher 9 within the mounting groove 7. This prevents the spring 8 from becoming unstable or the ball catcher 9 from tilting due to excessive displacement, ensuring the reliability of the positioning mechanism during long-term use. The mounting groove 7 is a tubular groove, with the diameter of the opening end of the mounting groove 7 being smaller than the inner diameter. The diameter of the opening end of the mounting groove 7 prevents the ball catcher 9 from detaching and allows it to extend outwards. The mounting groove 7 is designed as a tubular blind hole structure with a constant inner diameter. The orifice area near the opening end is formed by a diameter reduction process, resulting in a constricted section with an inner diameter smaller than the diameter of the ball catcher 9. The diameter of this constricted section is precisely set to allow part of the ball catcher 9's crown to protrude from the tube opening under the thrust of the spring 8 to achieve the positioning function, while physically preventing the ball catcher 9 from detaching entirely from the mounting groove 7, thus forming an anti-detachment limiting structure.

[0017] Working principle of this utility model: When installing a beam splitter prism, the operator aligns the convex ring 2 at the end of the prism body 1 with the annular gap between the outer constraint ring 4 and the inner plug 6 and pushes it in. The smooth chamfer on the edge of the convex ring 2 guides it smoothly into the gap. As the convex ring 2 is fully inserted, the retaining ball 9, pushed by the continuous preload of the spring 8 in the mounting groove 7 on the inner wall of the outer constraint ring 4, is squeezed by the outer wall of the convex ring 2 and retracts into the mounting groove 7. When the convex ring 2 moves to the set position, the retaining ball 9 automatically pops out under the elastic restoring force of the spring 8 and embeds itself into the hemispherical positioning groove 3 on the outer wall of the convex ring 2, forming... The mechanical self-locking mechanism involves multiple points of contact. Simultaneously, the inner plug 6 is inserted into the convex ring 2, and the retaining ball 9 on its outer wall is embedded in the staggered positioning grooves 3 on the inner side wall of the convex ring 2 using the same mechanism. Through the engagement of the retaining balls 9 on both the inner and outer sides with the positioning grooves 3, the mirror body 1 is constrained in multiple degrees of freedom in the radial and axial directions. During disassembly, only an axial tension is needed to overcome the preload of the spring 8, allowing the retaining ball 9 to slide out along the hemispherical curved surface of the positioning groove 3 to release the lock. The entire process requires no tools, and the standardized fit between the positioning groove 3 and the retaining ball 9 ensures a high degree of repeatability of the optical axis position after replacing different models of prisms.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A beam splitter prism, comprising a mirror body (1), wherein convex rings (2) are respectively provided at both ends of the mirror body (1), characterized in that: The inner and outer walls of the convex ring (2) are provided with uniformly spaced positioning grooves (3), wherein the positioning grooves (3) on the inner and outer walls of the convex ring (2) are interleaved. An outer constraint ring (4) is fitted on the outside of the convex ring (2). A mounting plate (5) is provided on the side of the outer constraint ring (4) away from the mirror body (1). An inner plug (6) concentric with the outer constraint ring (4) is provided on the surface of the mounting plate (5). The inner plug (6) extends into the convex ring (2). An installation groove (7) is provided on one side of the positioning groove (3) on the surface of the inner plug (6) and the outer constraint ring (4) near the convex ring (2). A spring (8) is provided inside the installation groove (7), and a retaining ball (9) is provided at the end of the spring (8).

2. A beam splitter according to claim 1, characterized in that: The positioning groove (3) is a hemispherical groove that is adapted to the ball (9).

3. A beam splitter according to claim 1, characterized in that: The flow area between the outer constraint ring (4) and the inner plug (6) is an annular gap that is adapted to the convex ring (2). The edge of the convex ring (2) near the outer constraint ring (4) and the inner plug (6) is provided with a smooth chamfer.

4. A beam splitter according to claim 1, characterized in that: The mounting plate (5) has a connector on the side facing away from the convex ring (2), and the mounting plate (5) is a circular plate structure.

5. A beam splitter according to claim 1, characterized in that: The two ends of the spring (8) are respectively connected to the inner wall of the mounting groove (7) and the ball (9). The spring (8) is always in a relaxed state, pushing the ball (9) towards the opening end of the mounting groove (7).

6. A beam splitter according to claim 5, characterized in that: The mounting groove (7) is a tubular groove. The diameter of the opening end of the mounting groove (7) is smaller than the inner diameter. The diameter of the opening end of the mounting groove (7) makes it impossible for the ball (9) to come out, but only to extend outward.

7. A beam splitter according to claim 6, characterized in that: The length of the mounting groove (7) is twice the diameter of the ball (9).

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