High-precision corner cube prism and manufacturing method

Abstract

The present invention is a high-precision corner cone prism and a manufacturing method, which overcomes the problems of extremely complex optical corner cone processing and high processing cost in the prior art. The present invention adopts a mechanical corner cone processing method with high processing accuracy, and can achieve high-precision optical corner cones. The present invention includes a square substrate and an integral structure right-angle substrate. Three mutually perpendicular plane substrates of the square substrate and the integral structure right-angle substrate constitute a three-dimensional space cube corner. The three plane substrates are respectively provided with a mounting base 1, a mounting base 2, and a mounting base 3 matching with an optical plane mirror 1, an optical plane mirror 2, and an optical plane mirror 3. The optical plane mirror 1, the optical plane mirror 2, and the optical plane mirror 3 are respectively arranged on the corresponding mounting base 1, the mounting base 2, and the mounting base 3.

Description

Technical field:

[0001] The invention belongs to the technical field of optical devices and relates to a high-precision corner cube prism and a manufacturing method thereof. Background technology:

[0002] A corner cone usually refers to any sharp corner of a cube, or a three-sided space cube corner composed of three mutually perpendicular square planes where the corner is located. The optical element with this spatial structure is called a corner cone prism, which has important applications in optics. The optical material is processed into the above-mentioned three mutually perpendicular space cube corners. The light waves are reflected in sequence by the three inner surfaces of the cube corner, which can achieve optical retroreflection and optical polarization modulation effects, thereby realizing special optical functions. Despite this, the optical corner cone processing process is extremely complex, requires high precision, and is costly. However, mechanical processing technology is mature and has high processing accuracy, and CNC processing equipment can meet the precision requirements of optical devices. Summary of the invention:

[0003] The purpose of the present invention is to provide a high-precision corner cone prism and a manufacturing method, which overcomes the problems of extremely complex optical corner cone processing and high processing cost in the prior art. It adopts a mechanical corner cone processing method with high processing accuracy and can achieve high-precision optical corner cones.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A high-precision corner cube prism comprises a square substrate and an integral right-angle substrate. Three mutually perpendicular plane substrates of the square substrate and the integral right-angle substrate constitute a three-dimensional space cube corner. The three plane substrates are respectively provided with a mounting base 1, a mounting base 2 and a mounting base 3 matching with an optical plane mirror 1, an optical plane mirror 2 and an optical plane mirror 3. The optical plane mirror 1, the optical plane mirror 2 and the optical plane mirror 3 are respectively arranged on the corresponding mounting base 1, the mounting base 2 and the mounting base 3.

[0006] The optical plane mirror 1, the optical plane mirror 2 or the optical plane mirror 3 can be replaced by an optical curved mirror.

[0007] A method for manufacturing a high-precision corner cube prism, characterized in that it comprises the following steps:

[0008] (1) First, a cube is processed by precision machining, and a first fixing hole and a second fixing hole between the substrates are reserved on the bottom surface, and a mounting hole for the prism relative to the optical adjustment element is processed at the outer vertex of the cone angle;

[0009] (2) then cut into square substrates and cuboids;

[0010] (3) Perform wire cutting on the cuboid, and only retain the right-angle substrate of the overall structure after cutting;

[0011] (4) The square substrate and the overall structure right-angle substrate form a precise three-dimensional cubic angle, namely a mechanical pyramid;

[0012] (5) An optical lens mounting base is processed on the three planar substrates where the cube corners are located, namely, the square substrate and the two substrates included in the overall structure right-angle substrate. The orientation of the mounting base is required to be absolutely symmetrical relative to the center axis of the corner cone, and the processing dimensions of each mounting base are exactly the same. Then, optical lenses with matching dimensions are installed to produce high-precision corner cube prisms.

[0013] Compared with the prior art, the present invention has the following advantages and effects:

[0014] 1) The entire processing process of the present invention is precision machining, using the mechanical corner pyramid as the mechanical base of the corner pyramid prism and matching it with an ordinary finished optical lens, the right-angle substrate is an integral structure, and the three sides of the semi-integral structure combined with the square substrate form a spatial solid angle that is perpendicular to each other, thereby ensuring the accuracy of the mechanical corner pyramid;

[0015] 2) The processing process of the present invention is simple, fast, and has high processing efficiency, which greatly saves costs;

[0016] 3) The present invention can realize high-precision corner cube prisms with extremely low cost by combining with commercial optical plane mirrors;

[0017] 4) In the present invention, since the optical element is embedded in three substrates, it is fixed by mechanical parts during actual application, so there is no need to consider the damage to the optical element during the fixing process. It is easy to use, stable and easy to adjust.

[0018] 5) The present invention can easily realize a curved mirror corner cube prism. Description of the drawings:

[0019] Figure 1 The schematic diagram of the corner cube prism assembly process;

[0020] Figure 2 This is a schematic diagram of a finished corner cube prism;

[0021] Figure 3 It is a schematic diagram of machining a cube;

[0022] Figure 4 This is a schematic diagram of a processing;

[0023] Figure 5 It is a schematic diagram of secondary processing;

[0024] Figure 6 This is a schematic diagram of the finished product of the high-precision mechanical substrate of the corner cube prism.

[0025] In the figure, 1-cube, 2-hole one for fixing substrates to each other, 3-hole two for fixing substrates to each other, 4-vertex outside the cone angle, 5-square substrate, 6-cuboid, 7-integral structure right-angle substrate, 8-three-dimensional space cube corner, 9-optical plane mirror one, 10-optical plane mirror two, 11-optical plane mirror three, 12-mounting base one, 13-mounting base two, 14-mounting base three. Specific implementation method:

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0027] See also Figure 1 and Figure 2 The present invention comprises a square substrate 5 and an integrally structured right-angle substrate 7. Three mutually perpendicular plane substrates of the square substrate 5 and the integrally structured right-angle substrate 7 form a three-dimensional space cube corner 8. The three plane substrates are respectively provided with a mounting base 12, a mounting base 2 13, and a mounting base 3 14 matching with an optical plane mirror 1 9, an optical plane mirror 2 10, and an optical plane mirror 3 11. The optical plane mirror 1 9, the optical plane mirror 2 10, and the optical plane mirror 3 11 are respectively arranged on the corresponding mounting base 1 12, the mounting base 2 13, and the mounting base 3 14. The optical plane mirror 1 9, the optical plane mirror 2 10, and the optical plane mirror 3 11 can be replaced with an optical curved mirror, thereby realizing a curved mirror corner cube prism.

[0028] The machining method of the high-precision corner cube prism of the present invention comprises the following steps:

[0029] See also Figure 3 , Figure 4 , Figure 5 and Figure 6 The specific implementation process is as follows Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, first, a cube 1 is processed by precision machining. To ensure the accuracy of the prism, it is necessary to process the bottom surface to reserve the fixing hole 1 2 between the substrates and the fixing hole 2 3 between the substrates. At the same time, the mounting hole of the prism relative to the optical adjustment element is processed at the vertex 4 outside the cone angle. Figure 3 ; then follow Figure 3 The thick dotted line in the middle is used for wire cutting, and the cutting is as follows Figure 4 The square substrate 5 and the cuboid 6 shown in the figure require the use of slow wire cutting to ensure cutting accuracy; the third step is to cut the Figure 4The rectangular parallelepiped 6 is cut in the direction indicated by the thick dashed line, and only the rectangular substrate 7 of the overall structure is left after cutting. It is also required to use slow wire cutting to ensure the cutting accuracy. Figure 5 Finally, the square substrate 5 and the overall structure of the right-angle substrate 7 can form a precise three-dimensional space cube corner 8, that is, a mechanical corner cone, such as Figure 6 In practice, the optical lens mounting base can be processed on the three planar substrates where the cube corners are located, namely the square substrate 5 and the two substrates included in the overall structure right-angle substrate 7, and optical lenses with matching sizes can be installed to realize a corner cube prism.

[0030] The prism implementation process is as follows Figure 1 , Figure 2 As shown: mounting base 12, mounting base 2 13, mounting base 3 14 matching with commercial optical plane mirror 1 9, optical plane mirror 2 10, and optical plane mirror 3 11 are processed on three plane substrates of mechanical pyramid, and the three optical plane mirrors are respectively installed in the corresponding mounting bases, as shown in FIG. Figure 1 As shown. To ensure the accuracy of the prism, the orientations of the mounting base 12, mounting base 2 13, and mounting base 3 14 are required to be absolutely symmetrical relative to the central axis of the pyramid, and the processing dimensions of each mounting base are exactly the same. Since the three plane substrates of the mechanical pyramid are perpendicular to each other, the optical planes of the optical plane mirror 1 9, optical plane mirror 2 10, and optical plane mirror 3 11 are also perpendicular to each other, as shown in FIG. Figure 2 As shown. The incident light passing through any plane mirror will be reflected by three plane mirrors in sequence, thus realizing the retroreflection function and optical polarization modulation effect of the corner cube prism. By replacing the plane mirror with a curved mirror, a curved mirror corner cube prism can be realized.

[0031] The above embodiments are only illustrative of the principles and effects of the present invention. A person skilled in the art may make several modifications and improvements without departing from the inventive concept of the present invention, and all of these belong to the protection scope of the present invention.

Claims

1. A high-precision corner cube prism, comprising a square substrate (5) and an integrally structured right-angle substrate (7), wherein three mutually perpendicular planar substrates of the square substrate (5) and the integrally structured right-angle substrate (7) form a three-dimensional space cube corner (8), wherein the three planar substrates are respectively provided with a mounting base 1 (12), a mounting base 2 (13) and a mounting base 3 (14) matching an optical plane mirror 1 (9), an optical plane mirror 2 (10) and an optical plane mirror 3 (11), wherein the optical plane mirror 1 (9), the optical plane mirror 2 (10) and the optical plane mirror 3 (11) are respectively arranged on the corresponding mounting base 1 (12), the mounting base 2 (13) and the mounting base 3 (14); The optical plane mirror 1 (9), the optical plane mirror 2 (10) or the optical plane mirror 3 (11) can be replaced by an optical curved mirror; The method for manufacturing a high-precision corner cube prism comprises the following steps: (1) First, a cube (1) is precision machined, and a first fixing hole (2) and a second fixing hole (3) between the substrates are reserved on the bottom surface, and a mounting hole for the prism relative to the optical adjustment element is machined at the outer vertex (4) of the cone angle; (2), then cut into square substrates (5) and cuboids (6); (3) Performing wire cutting on the cuboid (6), and only retaining the rectangular substrate (7) of the overall structure after cutting; (4) The square substrate (5) and the integral structural right-angle substrate (7) are combined to form a precise three-dimensional cubic corner (8), namely a mechanical corner cone; (5) Optical lens mounting bases are processed on the two substrates included in the three planar substrates where the cube corners are located, namely the square substrate (5) and the overall structural right-angle substrate (7). The orientation of the mounting bases is required to be absolutely symmetrical relative to the central axis of the corner cone, and the processing dimensions of each mounting base are exactly the same. Then, optical lenses with matching dimensions are installed to produce high-precision corner cube prisms.

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