Three-piece type glued cubic prism

Abstract

The utility model discloses a three-piece glued cubic prism, which comprises a first substrate, a second substrate and a third substrate, and the first substrate, the second substrate and the third substrate are polygonal pyramids. An included angle of 90 degrees or 45 degrees is formed between the conical surface of the first substrate and the large surface of the square; the first substrate is provided with at least three polished and coated surfaces; each of the second substrate and the third substrate is provided with at least three polished surfaces; and the other conical surfaces of the first substrate, the second substrate and the third substrate except the large square surface are mutually glued to form a cubic prism. According to the technical scheme, transmission and reflection in a three-dimensional space can be achieved under the condition that the boundary dimension is not changed, the number of the glue layers is small, the structure is compact, the influence of multiple times of gluing on precision can be effectively avoided, sub-parts are uniform in specification, machining is friendly, and batch production is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of optical parts processing, in particular to a three-piece glued cubic prism. Background Art

[0002] Glued cube prism products are multi-faceted polished spatially symmetrical optical components. The conventional structure is two right-angle prism blanks (glass / crystal and other optical materials) that are glued or photo-glued after coating. By evaporating different film layers on the polished surface, various single-point / broadband reflection / transmittance functions can be achieved, such as neutral beam splitting, color beam splitting, polarization beam splitting, depolarization beam splitting, etc. This two-piece structure can achieve two-dimensional transmission and reflection. Traditional glued cube prisms use glue to glue two right-angle prisms together. If you want to achieve three-dimensional transmission and reflection functions, you can only stack them, that is, two cube prisms are glued again (four right-angle prisms). There are many sub-components and many gluing surfaces. Not only are the external dimensions bloated, but the processing is not economical, the image adjustment is difficult, and the stability and reliability are poor.

[0003] For example, a Chinese invention patent (publication number CN105607274B) discloses a polarization beam splitter with a controllable P-polarized light splitting ratio (i.e., energy intensity ratio) and a working method thereof. The beam splitter includes a cubic prism and a quarter-wave plate. The cubic prism is composed of two tetrahedral prisms. The quarter-wave plate is arranged between the tetrahedral prisms. The quarter-wave plate is bonded to the tetrahedral prism through optical glue. The angle between the quarter-wave plate and the tetrahedral prism is 45°. The quarter-wave plate is connected to an externally controlled voltage module. The refractive index of the embedded quarter-wave plate is changed by the externally controlled voltage module to achieve precise adjustment of the polarization splitting ratio. The invention uses optical glue to glue two right-angle prisms together. The refractive index needs to be controlled by voltage, which is difficult to operate and has poor stability.

[0004] In addition, a Chinese invention patent (publication number CN106959074A) discloses a mirror-matching device for micro-nano movement and rotation angle measurement, including four coated right-angle prisms, the right-angle faces of the four right-angle prisms overlap in pairs, the right-angle edges of the four right-angle prisms overlap, and the four right-angle prisms form a cubic prism. This invention is a four-piece cubic prism, with many sub-components and many bonding surfaces, which is difficult to process and inconvenient to adjust the image. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a three-piece glued cubic prism with compact structure, less sub-components, less glue layers, high precision and reliability.

[0006] The utility model is achieved in this way:

[0007] A three-piece glued cubic prism comprises a first substrate, a second substrate and a third substrate, wherein the first substrate, the second substrate and the third substrate are polygonal pyramids;

[0008] The conical surface of the first substrate forms an angle of 90° or 45° with the large square surface;

[0009] The first substrate has at least three polished and coated surfaces;

[0010] The second substrate and the third substrate each have at least three polished surfaces;

[0011] The conical surfaces of the first substrate, the second substrate and the third substrate except the square large surface are glued together to form a cubic prism.

[0012] Furthermore, the first substrate, the second substrate and the third substrate are three special-shaped quadrangular pyramids.

[0013] Furthermore, the first substrate or the third substrate is firstly glued to the second substrate, and the glued combination is then glued to the third substrate or the first substrate to form a cubic prism.

[0014] Furthermore, the first substrate is firstly glued to the third substrate, and the glued combination is then glued to the second substrate to form a cubic prism.

[0015] The advantages of the utility model are:

[0016] It can realize three-dimensional transflection without changing the overall dimensions, and has less glue layers and a compact structure, which can effectively avoid the influence of multiple gluing on the precision. The sub-components have unified specifications, are processing-friendly, and are suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the cubic prism structure of the utility model.

[0019] Figure 2 Schematic diagram of the first substrate.

[0020] Figure 3 Schematic diagram of the second substrate.

[0021] Figure 4 Schematic diagram of the third substrate.

[0022] Figure 5 Schematic diagram of gluing the first substrate and the second substrate.

[0023] Figure 6 Schematic diagram of gluing the first substrate and the third substrate.

[0024] Figure numerals: 1, first substrate; 2, second substrate; 3, third substrate; 4, coating surface; 5, polishing surface. DETAILED DESCRIPTION

[0025] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0026] refer to Figures 1 to 3 The utility model provides a three-piece glued cubic prism, comprising a first substrate 1, a second substrate 2 and a third substrate 3, wherein the first substrate, the second substrate and the third substrate are three special-shaped quadrangular pyramids; the conical surface of the first substrate 1 forms an angle of 90° or 45° with the square large surface; the first substrate 1 and the third substrate 3 each have three polished and coated surfaces; the second substrate 2 has three polished surfaces 5; the conical surfaces of the first substrate 1, the second substrate 2 and the third substrate 3 except the square large surface are glued to each other to form a cubic prism.

[0027] The utility model cubic prism assembly method is as follows:

[0028] refer to Figure 1 and Figure 5 , the coated surface 4 of the first substrate 1 or the third substrate 3 is first glued to the polished surface of the second substrate 2 ( Figure 5 As shown), the other two conical surfaces of the glued combination are glued to the third substrate 3 or the first substrate 1 to form a cubic prism ( Figure 1 shown).

[0029] refer to Figure 1 and Figure 6 , the first substrate 1 is first glued to the third substrate 3 ( Figure 6 The glued combination is then glued to the polished surface 5 of the second substrate 2 to form a cubic prism ( Figure 1 shown).

[0030] Through the technical solution of the utility model, three-dimensional transflection can be achieved without changing the external dimensions, and the glue layer is less and the structure is compact, which can effectively avoid the influence of multiple gluing on the precision. The sub-components have unified specifications, are processing-friendly, and are suitable for mass production.

[0031] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A three-piece glued cubic prism, characterized in that: It comprises a first substrate, a second substrate and a third substrate, wherein the first substrate, the second substrate and the third substrate are polygonal pyramids; The conical surface of the first substrate forms an angle of 90° or 45° with the large square surface; The first substrate has at least three polished and coated surfaces; The second substrate and the third substrate each have at least three polished surfaces; The remaining conical surfaces of the first substrate, the second substrate and the third substrate except the square large surface are glued together to form a cubic prism.

2. The three-piece glued cubic prism according to claim 1, characterized in that: The first substrate, the second substrate and the third substrate are three special-shaped quadrangular pyramids.

3. The three-piece glued cubic prism according to claim 1, characterized in that: The first substrate or the third substrate is firstly glued to the second substrate, and the glued combination is then glued to the third substrate or the first substrate to form a cubic prism.

4. The three-piece glued cubic prism according to claim 1, characterized in that: The first substrate is firstly glued to the third substrate, and the glued combination is then glued to the second substrate to form a cubic prism.

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