Composite microprismatic reflective film integrating multiple triangular pyramids and manufacturing method for mold thereof

Abstract

A composite microprismatic reflective film integrating multiple triangular pyramids and a manufacturing method for a mold thereof. The surface of the microprismatic reflective film is formed by an array of identical parallelogram units; each parallelogram unit is composed of three identical triangular pyramids A, three identical triangular pyramids B, one triangular pyramid C, and one triangular pyramid D; bottom surfaces of the triangular pyramids A, B, C, and D are all identical equilateral triangles; inclination angles of three lateral faces of each triangular pyramid A are α / 2, α / 2, and β / 2+Δ, respectively; inclination angles of three lateral faces of each triangular pyramid B are α / 2, α / 2, and β / 2-Δ, respectively; inclination angles of three lateral faces of the triangular pyramid C are all β / 2+Δ; inclination angles of three lateral faces of the triangular pyramid D are all β / 2-Δ; and Δ is greater than zero. The performance under different application conditions can be reasonably optimized, thereby achieving an improvement of wide-angle performance and an optimization and balance of overall comprehensive performance.

Description

Composite micro-prism reflective film integrating multiple triangular pyramids and manufacturing method of mold thereof TECHNICAL FIELD

[0001] The present application relates to a composite micro-prism reflective film integrating multiple triangular pyramids and a manufacturing method of mold thereof. BACKGROUND

[0002] The micro-prism reflective film based on triangular pyramid unit structure: a tool is used to process three cornered pyramid surfaces of a triangular pyramid, and the inclination angles (the included angle with the vertical plane) of the three cornered pyramid reflecting surfaces are the same, as shown in FIG. 1. Such a micro-prism reflective film design is mainly used for type III and type IV reflective films with low performance requirements. When used for type V reflective film, under the conditions of large observation angle and large incident angle, the retroreflective coefficient cannot meet the standard requirements. In order to obtain the performance requirements of type V reflective film, different design or manufacturing solutions have been proposed at home and abroad. The American 3M company proposes to use a full-prism structure of the reflective film optical design. However, the design structure is complex, the manufacturing precision of the mold is high, and the manufacturing error has a great influence on the performance of the reflective film, which limits the popularization and application in China.

[0003] Specifically, the optical design variable of the micro-prism reflective film in the above FIG. 1 is only one, it is difficult to simultaneously improve the retroreflective performance of different incident angles and observation angles (especially wide angle), and the balance between the retroreflective performance of different incident angles and observation angles (especially wide angle and small incident angle), and the balance between the retroreflective performance of different azimuth angles (such as 0 degree, 90 degree and 180 degree).

[0004] In the prior art, in order to obtain the uniformity of the retroreflective performance of the reflective film in different azimuth angles, the nickel mold of type IV reflective film is usually mechanically spliced to manufacture the roller master mold by using two different orientation reflective film nickel molds of 0 degree and 90 degree; by slightly adjusting one angle to deviate from the standard cornered pyramid reflector structure, the retroreflective performance of the reflective film is regulated (such as improving the wide angle performance), but the above method is very complicated, and there is a mechanical joint error, which is difficult to achieve the expected effect.

[0005] Although the micro-prism reflective film with full-prism (American 3M) is 50% higher than the micro-prism reflective film with triangular pyramid in retroreflective performance (or the effective reflection area of the triangular pyramid reflective film is 66.67% of that of the full-prism reflective film), the mold structure of the full-prism reflective film (such as Chinese patents No. 2015107772604 and 201811202555.9) is very complex, and the manufacturing difficulty is very high. Moreover, due to the manufacturing error of the mold, the reflective performance is much lower than expected, which limits its popularization and application.

[0006] In view of the above shortcomings, the applicant applied for "Refractive Microprism Array Structure and Manufacturing Method Thereof" (publication number CN 117930406 A) in March 2024 and "Microprism Reflective Film with Double-triangular Pyramid Combination Structure and Manufacturing Method of Mould Thereof" (publication number CN 118759624 B) in September 2024.

[0007] Among them, "Refractive Microprism Array Structure and Manufacturing Method Thereof" is easier to manufacture than patents 2015107772604 and 201811202555.9, avoids secondary clamping and the difficulty of special-shaped surface processing, and ensures the quality of finished products. However, when processing the through holes on the second substrate in the processing procedure, it is necessary to drill holes one by one and then process them by wire cutting. The processing procedure is still relatively complicated, and each pyramid formed by processing is a regular triangular pyramid, the inclination angles of the pyramid faces are the same, the optical design variable of the microprism reflective film obtained is only one, and it is difficult to obtain different incidence angles and observation angles. That is, the microprism reflective film designed in this way can meet the performance requirements of Class IV reflective film, but when used for Class V reflective film, the retroreflective coefficient cannot meet the standard requirements under the conditions of large observation angle and large incidence angle.

[0008] Among them, "Microprism Reflective Film with Double-triangular Pyramid Combination Structure and Manufacturing Method of Mould Thereof" proposes to use two cutters with design angles of α and β to process two triangular pyramid combination structure microprism reflective films on the same mould substrate. After processing the large triangular pyramid using the first cutter with a cutter angle of α, the second cutter with a cutter angle of β is used for processing. The cutter orientation is adjusted according to the design requirements so that the inclination angles of the three pyramid faces of the central triangular pyramid are β / 2. At this time, the inclination angles of the two pyramid faces of the corner triangular pyramid are α / 2, and the inclination angle of the third pyramid face in the middle is β / 2. Although the angle variable of the triangular pyramid located in the center is adjusted to optimize the wide-angle performance of the reflective film to a certain extent, or to obtain a certain degree of optimization of the 0-degree and 90-degree performance of the reflective film, the microprism reflective film obtained still has the disadvantage of insufficient optical design optimization degree of freedom. Technical problem

[0009] In view of the above problems, the purpose of the present application is to propose a composite microprism reflective film integrated with multiple triangular pyramids and a manufacturing method of the mould thereof. The composite microprism reflective film integrated with multiple triangular pyramids and the manufacturing method of the mould thereof are designed reasonably, which can further increase the degree of freedom of optical design, are beneficial to optimization design, and can obtain better performance indicators under different application conditions. Technical solution

[0010] The technical solution of the present application is as follows:

[0011] The composite micro-prism reflective film integrating multiple triangular pyramids is characterized in that: the surface of the micro-prism reflective film is formed by an array of same parallelogram unit bodies, each parallelogram unit body is composed of three same triangular pyramids A, three same triangular pyramids B, one triangular pyramid C and one triangular pyramid D, the bottom surface of the triangular pyramids A, B, C and D is a same equilateral triangle, the bottom area ratio of the triangular pyramids A, B, C and D is 37.5%, 37.5%, 12.5% and 12.5% respectively, the three corner surfaces of the triangular pyramid A have the same inclination angle of α / 2, α / 2 and β / 2+△, the three corner surfaces of the triangular pyramid B have the same inclination angle of α / 2, α / 2 and β / 2-△, the three corner surfaces of the triangular pyramid C have the same inclination angle of β / 2+△, and the three corner surfaces of the triangular pyramid D have the same inclination angle of β / 2-△, and △ is greater than zero.

[0012] The composite micro-prism reflective film integrating multiple triangular pyramids is characterized in that: the surface of the micro-prism reflective film is formed by an array of same parallelogram unit bodies, each parallelogram unit body is composed of three same triangular pyramids A, three same triangular pyramids B, one triangular pyramid C and one triangular pyramid D, the bottom surface of the triangular pyramids A, B, C and D is a same equilateral triangle, the bottom area ratio of the triangular pyramids A, B, C and D is 37.5%, 37.5%, 12.5% and 12.5% respectively, the three corner surfaces of the triangular pyramid A have the same inclination angle of α / 2, α / 2 and βL, the three corner surfaces of the triangular pyramid B have the same inclination angle of α / 2, α / 2 and βR, the three corner surfaces of the triangular pyramid C have the same inclination angle of βL, and the three corner surfaces of the triangular pyramid D have the same inclination angle of βR, and βL is not equal to βR.

[0013] The composite micro-prism reflective film integrating multiple triangular pyramids is characterized in that: the surface of the micro-prism reflective film is formed by an array of same parallelogram unit bodies, each parallelogram unit body is composed of two same triangular pyramids A, two same triangular pyramids B, two triangular pyramids C, one triangular pyramid D and one triangular pyramid E, the bottom surface of the triangular pyramids A, B, C, D and E is a same equilateral triangle, the bottom area ratio of the triangular pyramids A, B, C, D and E is 25%, 25%, 25%, 12.5% and 12.5% respectively, the three corner surfaces of the triangular pyramid A have the same inclination angle of α / 2, the three corner surfaces of the triangular pyramid B have the same inclination angle of α / 2, α / 2 and β / 2+△, the three corner surfaces of the triangular pyramid C have the same inclination angle of α / 2, α / 2 and β / 2-△, the three corner surfaces of the triangular pyramid D have the same inclination angle of α / 2, β / 2+△ and β / 2+△, and the three corner surfaces of the triangular pyramid E have the same inclination angle of α / 2, β / 2-△ and β / 2-△, and △ is greater than zero.

[0014] A composite micro-prism reflective film integrating multiple triangular pyramids, characterized in that: the surface of the micro-prism reflective film is formed by an array of identical parallelogram unit bodies, each parallelogram unit body is composed of two identical triangular pyramids A, two identical triangular pyramids B, two triangular pyramids C, one triangular pyramid D and one triangular pyramid E, the base of the triangular pyramids A, B, C, D and E is an identical equilateral triangle, and the base area ratio of the triangular pyramids A, B, C, D and E is 25%, 25%, 25%, 12.5% and 12.5% respectively; the three corner surface angles of the triangular pyramid A are all α / 2, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and βL respectively, the three corner surface angles of the triangular pyramid C are α / 2, α / 2 and βR respectively, the three corner surface angles of the triangular pyramid D are α / 2, βL and βL respectively, the three corner surface angles of the triangular pyramid E are α / 2, βR and βR respectively, and βL is not equal to βR.

[0015] A manufacturing method of a mold for a composite micro-prism reflective film integrating multiple triangular pyramids, for manufacturing a mold for the micro-prism reflective film integrating a three-triangular pyramid combination structure, characterized in that:

[0016] The mold base material is horizontally installed on a workbench, the workbench can drive the mold base material to move along the horizontal X-axis and Y-axis, and a B-axis turntable on the workbench can drive the mold base material to rotate around the normal line B-axis of the mold base material, a main shaft parallel to the upper surface of the mold base material and a fly cutter head fixedly connected with the main shaft are arranged above the mold base material, a cutter is installed on the fly cutter head, and the cutter can rotate around the Y-axis under the driving of the main shaft, and the specific steps during manufacturing are as follows:

[0017] Step 1: rotate the mold base material on the B-axis turntable to 0 degrees, and use the first cutter with a cutter angle of α installed on the fly cutter head to process two side corner surfaces, i.e. corner surfaces γ1-1 and γ1-2, of the parallelogram unit body, and the inclination angle of the two side corner surfaces is α / 2, the first cutter is a symmetrical cutter, and the two side inclination angles are the same;

[0018] Step 2: rotate the mold base material on the B-axis turntable to 120 degrees, and use the first cutter with a cutter angle of α installed on the fly cutter head to process the other two side corner surfaces, i.e. corner surfaces γ2-1 and γ2-2, of the parallelogram unit body, and the inclination angle of the two side corner surfaces is α / 2;

[0019] Step 3: rotate the mold base material on the B-axis turntable to 240 degrees or 60 degrees, and use the first cutter with a cutter angle of α installed on the fly cutter head to process the two pairs of corner surfaces, i.e. corner surfaces γ3-1 and γ3-2, of the parallelogram unit body, and the inclination angle of the two pairs of corner surfaces is α / 2;

[0020] Step 4: On the basis of the structure processed in step 3, the mold base material is rotated to the 0-degree position, and a tool is used to process the corner cone surface γ4-1 and the corner cone surface γ4-2;

[0021] Step 5: The mold base material is sequentially rotated to the 120-degree position, and a tool is used to process the corner cone surface γ5-1 and the corner cone surface γ5-2;

[0022] Step 6: The mold base material is sequentially rotated to the 240-degree or 60-degree position, and a tool is used to process the corner cone surface γ6-1 and the corner cone surface γ6-2;

[0023] The second tool with a tool angle β is used in at least two of the steps 4, 5 and 6, and the first tool is used in the remaining steps, the second tool is installed on the tool holder of the working spindle, and an adjustable deflection angle Δ exists between the mechanical shafts of the tool holders, so that the inclination angles of the left and right tool edges of the second tool are β / 2+Δ and β / 2-Δ, and the inclination angles of the corner cone surfaces processed by the left and right tool edges are β / 2+Δ and β / 2-Δ, respectively.

[0024] Alternatively, the second tool is an asymmetric tool with a tool angle β, and the inclination angles of the left and right tool edges of the second tool are βL and βR, respectively, so that the inclination angles of the corner cone surfaces processed by the left and right tool edges are βL and βR, respectively. Advantages

[0025] The present application has the following technical advantages.

[0026] From the perspective of optical design, the increase in the degree of freedom of optical design means that the optical system can meet more performance indicators of different application conditions at the same time. For a high-performance Class V anti-reflection film, improving the wide-angle performance at large observation angles, large incident angles, 90-degree and 0-degree azimuthal orientation, and the optimization and balance thereof have always been the focus of research and development of Class V anti-reflection film technology.

[0027] The performance under different application conditions can be reasonably optimized, so that the wide-angle performance improvement and the optimization and balance of the overall comprehensive performance that cannot be achieved by traditional triangular pyramid unit structures and double-triangular pyramid combined structures of micro-prism anti-reflection films can be obtained; the performance of the anti-reflection film can be further improved, while the anti-reflection film structure is simple, and the complexity of the anti-reflection film mold manufacturing is effectively controlled.

[0028] By selecting different deflection angles Δ of the second tool with a tool angle β (or designing an asymmetric tool with different inclination angles βL and βR of the left and right tool edges) and different combinations of the tools used in steps 4-6, a micro-prism anti-reflection film design with a plurality of different triangular pyramid (corner cone surface inclination angle change) combined structures can be obtained, and the overall performance of the anti-reflection film can be improved, and the optimization of the wide-angle performance and the small-angle performance, the 90-degree and 0-degree orientation performance. BRIEF DESCRIPTION OF DRAWINGS

[0029] The application will be further described below with reference to the drawings;

[0030] Fig. 1 is a front view of a conventional triangular prism;

[0031] Fig. 2 is a perspective view of a mold base placed on a worktable for processing;

[0032] Fig. 3 is a sectional view of a fly cutter processing a mold base;

[0033] Fig. 4 is a sectional view of another fly cutter processing a mold base;

[0034] Fig. 5 is a front view of a micro-prism reflective film and a mold finished product according to the application;

[0035] Fig. 6 is a perspective view of a mold base before processing;

[0036] Fig. 7 is a front view of Fig. 6;

[0037] Fig. 8 is a front view of the mold base of Fig. 7 after Step 1 processing;

[0038] Fig. 9 is a front view of the mold base of Fig. 8 after Step 2 processing;

[0039] Fig. 10 is a front view of the mold base of Fig. 9 after Step 3 processing;

[0040] Fig. 11 is a perspective view of Fig. 10;

[0041] Fig. 12 is a front view of the mold base of Fig. 10 after Step 4 processing;

[0042] Fig. 13 is a perspective view of Fig. 12;

[0043] Fig. 14 is a front view of the mold base of Fig. 12 after Step 5 processing;

[0044] Fig. 15 is a perspective view of Fig. 14;

[0045] Fig. 16 is a front view of the mold base of Fig. 15 after Step 6 processing;

[0046] Fig. 17 is a front view of a parallelogram unit body of a fifth embodiment;

[0047] Fig. 18 is a front view of a reflective film of the fifth embodiment;

[0048] Fig. 19 is a front view of a parallelogram unit body of a sixth embodiment;

[0049] Fig. 20 is a front view of a reflective film of the sixth embodiment. Embodiments of the application

[0050] The application will be further described below in combination with the drawings and specific embodiments.

[0051] The micro-prism reflective film of the application integrates multiple triangular pyramid combination structures, and is specifically as follows:

[0052] In the first embodiment, the surface of the micro-prism reflective film is formed by an array of identical parallelogram unit bodies 1, each of which is composed of three identical triangular pyramids A, three identical triangular pyramids B, one triangular pyramid C and one triangular pyramid D. The base of each of the triangular pyramids A, B, C and D is an identical equilateral triangle. The base area ratio of the triangular pyramids A, B, C and D is 37.5%, 37.5%, 12.5% and 12.5% respectively. The three corner surface angles of the triangular pyramid A are α / 2, α / 2 and β / 2+△ respectively, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and β / 2-△ respectively, the three corner surface angles of the triangular pyramid C are β / 2+△ respectively, and the three corner surface angles of the triangular pyramid D are β / 2-△ respectively. △ is greater than zero. In this embodiment, α=70.45-70.60°, β=70.20-70.85°, and Δ=0.01-0.33°.

[0053] In the second embodiment, the surface of the micro-prism reflective film is formed by an array of identical parallelogram unit bodies 1, each of which is composed of three identical triangular pyramids A, three identical triangular pyramids B, one triangular pyramid C and one triangular pyramid D. The base of each of the triangular pyramids A, B, C and D is an identical equilateral triangle. The base area ratio of the triangular pyramids A, B, C and D is 37.5%, 37.5%, 12.5% and 12.5% respectively. The three corner surface angles of the triangular pyramid A are α / 2, α / 2 and βL respectively, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and βR respectively, the three corner surface angles of the triangular pyramid C are βL respectively, and the three corner surface angles of the triangular pyramid D are βR respectively. βL is not equal to βR. In this embodiment, α=70.45-70.60°, β=βL+βR, βL=35.35-35.40° or 35.125-35.175°, and βR=35.40-35.45° or 35.075-35.125°.

[0054] The third embodiment: the surface of the micro-prism light reflecting film is formed by the array of the same parallelogram unit body 1, each parallelogram unit body 1 is composed of two same triangular pyramid A, two same triangular pyramid B, two triangular pyramid C, one triangular pyramid D and one triangular pyramid E, the base of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C, the triangular pyramid D and the triangular pyramid E are all the same equilateral triangle, the bottom area ratio of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C, the triangular pyramid D and the triangular pyramid E are 25%, 25%, 25%, 12.5% and 12.5% respectively; the three corner surface angles of the triangular pyramid A are all α / 2, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and β / 2+△ respectively, the three corner surface angles of the triangular pyramid C are α / 2, α / 2 and β / 2-△ respectively, the three corner surface angles of the triangular pyramid D are α / 2, β / 2+△ and β / 2+△ respectively, the three corner surface angles of the triangular pyramid E are α / 2, β / 2-△ and β / 2-△ respectively, △ is greater than zero, in this embodiment, α=70.45-70.60°, β=70.20-70.85°, Δ=0.01-0.33°

[0055] The fourth embodiment: the surface of the micro-prism light reflecting film is formed by the array of the same parallelogram unit body 1, each parallelogram unit body 1 is composed of two same triangular pyramid A, two same triangular pyramid B, two triangular pyramid C, one triangular pyramid D and one triangular pyramid E, the base of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C, the triangular pyramid D and the triangular pyramid E are all the same equilateral triangle, the bottom area ratio of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C, the triangular pyramid D and the triangular pyramid E are 25%, 25%, 25%, 12.5% and 12.5% respectively; the three corner surface angles of the triangular pyramid A are all α / 2, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and βL respectively, the three corner surface angles of the triangular pyramid C are α / 2, α / 2 and βR respectively, the three corner surface angles of the triangular pyramid D are α / 2, βL and βL respectively, the three corner surface angles of the triangular pyramid E are α / 2, βR and βR respectively, βL is not equal to βR; in this embodiment, α=70.45-70.60°, β=βL+βR, βL=35.35-35.40° or 35.125-35.175°, βR=35.40-35.45° or 35.075-35.125°

[0056] The manufacturing method of the mold of the micro-prism reflective film of the composite type integrating multiple triangular pyramids is as follows (i.e. the mold for manufacturing the micro-prism reflective film of the multiple triangular pyramid combination structure, the mold is one-to-one corresponding to the reflective film structure, the mold of the multiple triangular pyramid combination structure is formed by the same array of parallelogram unit bodies, each parallelogram unit body is formed by 6 knives, two side corner surfaces formed by the first knife are marked as γ1-1 and γ1-2 respectively, two side corner surfaces formed by the second knife are marked as γ2-1 and γ2-2 respectively, and two side corner surfaces formed by the sixth knife are marked as γ6-1 and γ6-2 respectively, as shown in FIG. 6, the micro-prism reflective film of the following several embodiments is obtained by the above processing):

[0057] The first kind of cutter with the cutter angle α is used in the array processing and forming of the first to third knives, and the first kind of cutter with the cutter angle α or the second kind of cutter with the cutter angle β and the bias angle Δ (or the left and right cutter blade inclination angles are βL and βR respectively) is selectively used in the array processing and forming of the fourth to sixth knives.

[0058] 1. Four triangular pyramid structures: when the fourth, fifth and sixth knives are all processed and formed by the second kind of cutter β with the bias angle Δ, it is composed of a triangular pyramid A with three corner surface inclination angles of α / 2, α / 2 and β / 2+△ (or βL) and an area ratio of 37.55%, a triangular pyramid B with three corner surface inclination angles of α / 2, α / 2 and β / 2-△ (or βR) and an area ratio of 37.5%, a triangular pyramid C with three corner surface inclination angles of β / 2+△ (or βL) and an area ratio of 12.5%, and a triangular pyramid D with three corner surface inclination angles of β / 2-△ (or βR) and an area ratio of 12.5%.

[0059] 2. Five triangular pyramid structures: when the fourth, fifth or fifth, sixth or fourth, sixth knives are processed and formed by the second kind of cutter β with the bias angle Δ, it is composed of a triangular pyramid A with three corner surface inclination angles of α / 2 and an area ratio of 25%, a triangular pyramid B with three corner surface inclination angles of α / 2, α / 2 and β / 2+△ (or βL) and an area ratio of 25%, a triangular pyramid C with three corner surface inclination angles of α / 2, α / 2 and β / 2-△ (or βR) and an area ratio of 25%, a triangular pyramid C with three corner surface inclination angles of α / 2, β / 2+△ (or βL) and β / 2+△ (or βL) and an area ratio of 12.5%, and a triangular pyramid E with three corner surface inclination angles of α / 2, β / 2-△ (or βR) and β / 2-△ (or βR) and an area ratio of 12.5%.

[0060] The two new designs increase the optical design freedom of the triangular pyramid reflective surface film. When only the 4th, 5th or 6th knife (only one of the 4th-6th knives) is used to form the triangular pyramid combination structure micro-prism reflective film with the design knife angle β and the existence of the angle Δ (or the left and right knife angles are βL and βR, respectively).

[0061] The specific processing equipment and method are as follows:

[0062] The mold base K1 for processing the mold is horizontally installed on the workbench K2, the workbench can drive the mold base to move along the horizontal X-axis and Y-axis, and the B-axis turntable on the workbench can drive the mold base to rotate around the normal line B-axis of the mold base. A main shaft K3 parallel to the upper surface of the mold base and a fly cutter disc K4 fixedly connected with the main shaft are arranged above the mold base, a knife K5 is installed on the fly cutter disc, and the knife can rotate around the Y-axis under the driving of the main shaft. The specific steps during manufacturing are as follows:

[0063] Step 1: rotate the mold base on the B-axis turntable to 0 degrees, and use the first kind of knife with the knife angle α installed on the fly cutter disc to process the two side cone surfaces of the parallelepiped unit body, that is, the corner cone surface γ1-1 and the corner cone surface γ1-2, and the inclination angle is α / 2. The first kind of knife is a symmetrical knife, and the inclination angles of the two sides are the same.

[0064] Step 2: rotate the mold base on the B-axis turntable to 120 degrees, and use the first kind of knife with the knife angle α installed on the fly cutter disc to process the other two side cone surfaces of the parallelepiped unit body, that is, the corner cone surface γ2-1 and the corner cone surface γ2-2, and the inclination angle is α / 2.

[0065] Step 3: rotate the mold base on the B-axis turntable to 240 degrees or 60 degrees, and use the first kind of knife with the knife angle α installed on the fly cutter disc to process the two pairs of corner cone surfaces of the parallelepiped unit body 1, that is, the corner cone surface γ3-1 and the corner cone surface γ3-2, and the inclination angle is α / 2.

[0066] Step 4: on the basis of the structure processed in step 3, rotate the mold base to 0 degrees, and use the knife to process the corner cone surface γ4-1 and the corner cone surface γ4-2.

[0067] Step 5: sequentially rotate the mold base to 120 degrees, and use the knife to process the corner cone surface γ5-1 and the corner cone surface γ5-2.

[0068] Step 6: sequentially rotate the mold base to 240 degrees or 60 degrees, and use the knife to process the corner cone surface γ6-1 and the corner cone surface γ6-2.

[0069] The second tool is used in at least two of the steps 4, 5 and 6, and the first tool is used in the remaining steps, the second tool is a symmetric tool with a tool angle of β, the second tool is installed on the tool holder of the working spindle, and there is an adjustable angle of deflection Δ of the mechanical axis of the tool holder, so that the angles of the two sides of the tool blade are β / 2+Δ and β / 2-Δ, and the angles of the pyramidal surfaces machined on the left and right sides of the tool blade are β / 2+Δ and β / 2-Δ (as shown in the figure);

[0070] Alternatively, the second tool is an asymmetric tool with a tool angle of β, the angles of the left and right tool blades of the second tool are βL and βR, the second tool is installed on the tool holder of the working spindle, and the mechanical axis of the tool holder is adjusted to be vertical, so that the angles of the pyramidal surfaces machined on the left and right sides of the tool blade are βL and βR (as shown in the figure).

[0071] Specific embodiment 1: the second tool is used in steps 4, 5 and 6, the second tool is installed on the tool holder of the working spindle, and there is an adjustable angle of deflection Δ of the mechanical axis of the tool holder, so that the angles of the two sides of the tool blade are β / 2+Δ and β / 2-Δ, and the angles of the pyramidal surfaces machined on the left and right sides of the tool blade are β / 2+Δ and β / 2-Δ; three pyramids A with angles of α / 2, α / 2 and β / 2+Δ and an area ratio of 37.55%, three pyramids B with angles of α / 2, α / 2 and β / 2-Δ and an area ratio of 37.5%, three pyramids C with angles of β / 2+Δ and an area ratio of 12.5%, and three pyramids D with angles of β / 2-Δ and an area ratio of 12.5% are machined, and the three pyramids A, the three pyramids B, the three pyramids C and the three pyramids D constitute a micro-prism reflective film mold with four different three-pyramid combination structures.

[0072] Specific embodiment 2: the second tool is used in steps 4, 5 and 6, the second tool is an asymmetric tool with a tool angle of β, the angles of the left and right tool blades of the second tool are βL and βR, so that the angles of the pyramidal surfaces machined on the left and right sides of the tool blade are βL and βR; three pyramids A with angles of α / 2, α / 2 and βL and an area ratio of 37.55%, three pyramids B with angles of α / 2, α / 2 and βR and an area ratio of 37.5%, three pyramids C with angles of βL and an area ratio of 12.5%, and three pyramids D with angles of βR and an area ratio of 12.5% are machined, and the three pyramids A, the three pyramids B, the three pyramids C and the three pyramids D constitute a micro-prism reflective film mold with four different three-pyramid combination structures.

[0073] The above embodiments 1 and 2 obtain a micro-prism reflective film mold with four different three-pyramid combination structures.

[0074] Specific embodiment 3: in steps 4, 5 and 6, step 4 uses the first tool, steps 5 and 6 use the second tool, the second tool is installed on the tool holder of the working spindle, and there is an adjustable angle of deflection Δ of the mechanical shaft of the tool holder, so that the angles of the two sides of the cutting edge of the second tool are β / 2+Δ and β / 2-Δ, and the angles of the pyramidal surfaces machined on the left and right sides of the cutting edge are β / 2+Δ and β / 2-Δ; three pyramids A with an angle of α / 2 and an area ratio of 25%, three pyramids B with angles of α / 2, α / 2 and β / 2+Δ and an area ratio of 25%, three pyramids C with angles of α / 2, α / 2 and β / 2-Δ and an area ratio of 25%, three pyramids D with angles of α / 2, β / 2+Δ and β / 2+Δ and an area ratio of 12.5%, and three pyramids E with angles of α / 2, β / 2-Δ and β / 2-Δ and an area ratio of 12.5% are machined, and the pyramids A, B, C, D and E constitute a micro-prism reflective film mold with five different three-pyramid combination structures.

[0075] Specific embodiment 4: in steps 4, 5 and 6, step 4 uses the first tool, steps 5 and 6 use the second tool, the second tool is an asymmetric tool with a tool angle of β, and the angles of the left and right cutting edges of the second tool are βL and βR, respectively, so that the angles of the pyramidal surfaces machined on the left and right sides of the cutting edge are βL and βR; three pyramids A with an angle of α / 2 and an area ratio of 25%, three pyramids B with angles of α / 2, α / 2 and βL and an area ratio of 25%, three pyramids C with angles of α / 2, α / 2 and βR and an area ratio of 25%, three pyramids D with angles of α / 2, βL and βL and an area ratio of 12.5%, and three pyramids E with angles of α / 2, βR and βR and an area ratio of 12.5% are machined, and the pyramids A, B, C, D and E constitute a micro-prism reflective film mold with five different three-pyramid combination structures.

[0076] The above embodiments 3 and 4 obtain a micro-prism reflective film mold with five different three-pyramid combination structures.

[0077] The above-mentioned mold is machined to obtain a reflective film by using existing conventional techniques (which are prior art and will not be described here).

[0078] The micro-prism light reflection film with a double-triangular pyramid combined structure and a manufacturing method of a mold thereof (publication number CN118759624B) uses a first tool with a tool angle of alpha to process a large triangular pyramid, and then uses a second tool with a tool angle of beta to process (a total of 6 tool processing and 6 steps), although the wide-angle performance of the light reflection film can be optimized to a certain extent by adjusting the angle variable of the triangular pyramid located in the center, or the performance of the light reflection film at 0 degrees and 90 degrees is optimized to a certain extent, but under the same processing step condition (the present application is also processed by 6 tools and 6 steps), the micro-prism light reflection film still has a design freedom of two triangular pyramids, and the optical design optimization freedom is insufficient, and the above-mentioned embodiments of the present application can obtain a micro-prism light reflection film design with a plurality of different triangular pyramids (angle cone surface inclination angle change) combined structure, and realize the improvement of the overall performance of the light reflection film, and the optimization of the wide-angle performance and the small-angle performance, the 90-degree and 0-degree orientation performance.

[0079] The foregoing embodiments of the present application have the following technical advantages.

[0080] From the perspective of optical design, the increase in optical design freedom means that the optical system can simultaneously meet the performance indicators of more different application conditions, and for high-performance V-type light reflection films, improving the wide-angle performance at large observation angles and large incident angles, the performance at 90 degrees and 0 degrees azimuthal orientation, and the optimization and balance thereof have always been the focus of V-type light reflection film technology research and development.

[0081] The performance under different application conditions can be reasonably optimized, so that the wide-angle performance improvement and the overall comprehensive performance optimization and balance of the traditional triangular pyramid unit structure and the micro-prism light reflection film with a double-triangular pyramid combined structure cannot be achieved, the performance of the light reflection film can be further improved, and the advantages of simple light reflection film structure and effective control of light reflection film mold manufacturing complexity are maintained.

[0082] The present application can obtain a micro-prism light reflection film design with a plurality of different triangular pyramids (angle cone surface inclination angle change) combined structure by selecting different bias angle delta values of the second tool with a tool angle design of beta (or designing an asymmetric tool with different inclination angles beta L and beta R of the left and right tool edges) and different combinations of the tools used for the fourth to sixth tools, and realize the improvement of the overall performance of the light reflection film, and the optimization of the wide-angle performance and the small-angle performance, the 90-degree and 0-degree orientation performance.

[0083] In addition, the fifth embodiment of the present application (as shown in Figures 17 and 18) is formed by the same array of parallelogram unit bodies 1, each of which is composed of four identical triangular pyramids 1A, two mixed triangular pyramids 1B and two mixed triangular pyramids 1C, the base of each of the triangular pyramids 1A, the mixed triangular pyramids 1B and the mixed triangular pyramids 1C is an identical equilateral triangle, the three corner faces of each triangular pyramid 1A have an angle of α / 2, the mixed triangular pyramids 1B have an angle of α / 2, α / 2 and βL, and the mixed triangular pyramids 1C have an angle of α / 2, α / 2 and βR; the triangular pyramids 1A are triangular pyramid 1A1, triangular pyramid 1A2, triangular pyramid 1A3 and triangular pyramid 1A4, respectively, the mixed triangular pyramids 1B are triangular pyramid 1B1 and triangular pyramid 1B2, respectively, the mixed triangular pyramids 1C are triangular pyramid 1C1 and triangular pyramid 1C2, respectively, the first row of the parallelogram unit bodies 1 is triangular pyramid 1A3, triangular pyramid 1A4, triangular pyramid 1C2 and triangular pyramid 1B2 in order, the second row of the parallelogram unit bodies 1 is triangular pyramid 1C1, triangular pyramid 1B1, triangular pyramid 1A1 and triangular pyramid 1A2 in order, and the directions of the adjacent triangular pyramids are 180 degrees to each other.

[0084] This embodiment is specifically the array intercept of the micro-prism light-reflecting film, which is 0.433 mm, and each parallelogram unit body 1 in the micro-prism light-reflecting film contains 8 triangular pyramids with a bottom side length of 250 μm; α = 70.55 degrees, β = 70.15 degrees, βL = 35.15° and βR = 35.00°.

[0085] The corner face 1C101 of the triangular pyramid 1C1 is coplanar with the corner face 1A101 of the triangular pyramid 1A1, the corner face 1A401 of the triangular pyramid 1A4 is coplanar with the corner face 1B201 of the triangular pyramid 1B2, the corner face 1C102 of the triangular pyramid 1C1 is coplanar with the corner face 1A301 of the triangular pyramid 1A3, the corner face 1A201 of the triangular pyramid 1A2 is coplanar with the corner face 1B202 of the triangular pyramid 1B2, the corner face 1A102 of the triangular pyramid 1A1 is coplanar with the corner face 1A302 of the triangular pyramid 1A3, the corner face 1A202 of the triangular pyramid 1A2 is coplanar with the corner face 1A402 of the triangular pyramid 1A4, the corner face 1A303 of the triangular pyramid 1A3 is coplanar with the corner face 1C201 of the triangular pyramid 1C2, the corner face 1B101 of the triangular pyramid 1B1 is coplanar with the corner face 1A203 of the triangular pyramid 1A2, the corner face 1B102 of the triangular pyramid 1B1 is coplanar with the corner face 1A403 of the triangular pyramid 1A4, and the corner face 1A103 of the triangular pyramid 1A1 is coplanar with the corner face 1C202 of the triangular pyramid 1C2.

[0086] The processing method of the fifth embodiment is similar to the above-mentioned processing steps 1-6, except that step 1-5 uses the first tool with tool angle α to process two pairs of conical surfaces, and step 6 uses the second tool with asymmetric structure and tool angle β, the left blade angle of the second tool is βL, and the right blade angle is βR, βL is not equal to βR, the left blade processes the three-prism angle cone reflecting surface with an angle of βL, and the right blade processes the three-prism angle cone reflecting surface with an angle of βR.

[0087] At this point, the mold of the micro-prism reflective film composed of three different three-prism structures, each three-prism 1A with an angle of α / 2, the mixed three-prism 1B with angles of α / 2, α / 2 and βL, and the mixed three-prism 1C with angles of α / 2, α / 2 and βR, is processed and formed.

[0088] The specific processing example of the fifth embodiment: the first tool has a tool angle α = 70.55 degrees; the second tool is an asymmetric tool with a tool angle β = 70.15°, the left blade angle is βL = 35.15°, and the right blade angle is βR = 35.00°; during processing, first use the first tool to process the array according to the 1B axis rotation angle of 0 degrees, 240 degrees or 60 degrees, 120 degrees, and the intercept of 0.433 mm, and process the first- third knives to form large three-prism platforms (500 microns in length, refer to the above-mentioned steps 1-3); then process the fourth- fifth knives along the center line of the large three-prism platform according to the 1B axis rotation angle of 240 degrees or 60°, 120°, and the intercept of 0.433 mm; finally, replace the second tool, process the sixth knife along the center line of the adjacent edges of the large three-prism platform according to the 1B axis rotation angle of 240 degrees or 60°, and the intercept of 0.433 mm, to form a composite micro-prism reflective film composed of parallel four-sided element arrays (refer to the above-mentioned steps 4-6), each parallel four-sided element contains eight three-prisms with a length of 250 μm, four of which have a reflecting surface with an angle of α / 2, two of which have a reflecting surface with angles of α / 2 and βL, and two of which have a reflecting surface with angles of α / 2 and βR.

[0089] In order to verify the significant advantages of the above-mentioned embodiments of the present application, a comparative example is provided as follows:

[0090] The tool has a tool angle α = 70.55 degrees, and the three-prism has a length of 250 μm; process the array according to the 1B axis rotation angle of 0 degrees (or 180 degrees), 60 degrees (or 240 degrees), and 120 degrees (or 300 degrees), and the intercept of 216.5 μm, to form a conventional three-prism micro-prism reflective film composed of the same parallel four-sided element array, each parallel four-sided element is composed of two identical three-prisms, and the reflecting surface of the three-prism has an angle of α / 2.

[0091]

[0092] Technical advantage description: The comparative example is a conventional triangular pyramid micro-prism reflective film, and its retroreflective performance is mainly distributed in a small observation angle of 0.2 degrees. It cannot meet the requirements of the five categories (category V) under the test conditions of an incident angle of 30 degrees, observation angles of 0.5 degrees and 1 degree, and observation angles of 1 degree, incident angles of -4 degrees and 15 degrees. The micro-prism reflective film prepared in the application is composed of three different triangular pyramids, and the retroreflective performance under the test conditions of large observation angles and large incident angles is optimized and improved, so that the retroreflective performance under all test conditions meets the requirements of the V category standard.

[0093] In order to improve the processing efficiency, the first tool (step 1) and the fourth tool (step 4) in the processing steps of the fifth embodiment above can be performed together (the base material in both steps is at a 0-degree position, that is, the 1B shaft does not need to be rotated, and only the Y-axis of the base material needs to be moved), and the second tool (step 2) and the fifth tool (step 5) can be performed together (the base material in both steps is at a 120-degree position, that is, the 1B shaft does not need to be rotated, and only the Y-axis of the base material needs to be moved).

[0094] The present application has three triangular pyramids with an angle of α / 2, a mixed triangular pyramid 1B with an angle of α / 2, α / 2 and βL, and three mixed triangular pyramids 1C with an angle of α / 2, α / 2 and βR; it achieves the design freedom of three triangular pyramids, and the bottom area ratios of the three triangular pyramids 1A, the triangular pyramid 1B and the triangular pyramid 1C are 50%, 25% and 25% respectively, which can further reasonably optimize the performance under different application conditions, so as to obtain the wide-angle performance improvement, and the optimization and balance of the overall comprehensive performance which cannot be achieved by the traditional triangular pyramid unit structure and the double-triangular pyramid combined structure.

[0095] As a special case, when βL=βR=β / 2, it becomes a conventional symmetric structure of the angle surface. Another special case is that the angle surface is a symmetric structure but its orientation has an angle Δ,

[0096] 1. The angle β of the asymmetric angle surface is composed of the sum of the left side angle βL and the right side angle βR, that is, β=βL+βR.

[0097] 2. The angle βL and βR of the angle surface with an angle Δ are equivalent to a specific asymmetric angle: βL=β / 2+△, βR=β / 2-△.

[0098] 3. When Δ=0, βL=βR=β / 2. The left and right sides of the angle surface are symmetric structures.

[0099] The fifth embodiment of the reflective film mold forming process, the second cutter with a cutter angle of β is a symmetrical structure cutter, by adjusting the specific cutter deflection angle Δ value, so that βL=β / 2+Δ, βR=β / 2-Δ; The selection of the cutter deflection angle Δ during forming is equivalent to using a specific asymmetric cutter βL=β / 2+△, βR=β / 2-△; When the cutter deflection angle Δ changes, the angle between the two adjacent conical surfaces formed by the second cutter remains unchanged; For a given cutter angle β, once the deflection angle Δ is selected, βL is determined, and βR is also determined, βL and βR are not two completely independent conical angle design variables, but both depend on the cutter angle β and its deflection angle Δ.

[0100] The fifth embodiment of the present application has the following technical advantages.

[0101] From the perspective of optical design, the increase in the degree of freedom of optical design means that the optical system can meet the performance indicators of more different application conditions at the same time. For high-performance V-type reflective film, improving the wide-angle performance of large observation angle, large incidence angle, 90-degree and 0-degree azimuthal orientation, and its optimization and balance have always been the focus of V-type reflective film technology research and development; The reflective film of the present application has three triangular prisms with conical surface inclination angles of α / 2, mixed triangular prisms 1B with conical surface inclination angles of α / 2, α / 2 and βL, and three mixed triangular prisms 1C with conical surface inclination angles of α / 2, α / 2 and βR; It reaches the design freedom of three kinds of triangular prisms, and the bottom area ratio of the three kinds of triangular prisms 1A, 1B and 1C is 50%, 25% and 25% respectively, which can reasonably optimize the performance under different application conditions, so as to obtain the wide-angle performance improvement and the optimization and balance of the overall comprehensive performance which cannot be realized by the micro-prism reflective film with the traditional triangular prism unit structure and the double-triangular prism combined structure.

[0102] In addition, the sixth embodiment of the present application (as shown in Figures 19 and 20): formed by an array of the same parallelogram unit body 1, each parallelogram unit body 1 is specifically composed of four identical triangular prisms 2A, one triangular prism 2B and three identical triangular prisms 2C, wherein the triangular prisms 2A are triangular prisms 2A1, 2A2, 2A3 and 2A4 respectively, the triangular prisms 2C are triangular prisms 2C1, 2C2 and 2C3 respectively, the first row of the parallelogram unit body is sequentially ordered as triangular prisms 2A3, 2C1, 2A4 and 2C2, the second row of the parallelogram unit body is sequentially ordered as triangular prisms 2A1, 2B, 2A2 and 2C3, and the directions of adjacent triangular prisms are 180 degrees apart.

[0103] The orientations of the four triangular pyramids 2A are 180 degrees to the orientations of the three triangular pyramids 2C and the triangular pyramid 2B, the three triangular pyramids 2C are arranged between the four triangular pyramids 2A.

[0104] The base of the triangular pyramid 2A, the triangular pyramid 2B and the triangular pyramid 2C are all equilateral triangles, the three corner surfaces of each triangular pyramid 2A are all inclined at an angle of α / 2, the corner surfaces of the triangular pyramid 2B are all inclined at an angle of β / 2, and the three corner surfaces of the triangular pyramid 2C are inclined at angles of α / 2, α / 2 and β / 2 respectively, where in the sixth embodiment α = 70.50 degrees, β = 70.32 degrees, and γ = 0.5*(α+β) = 70.41 degrees.

[0105] Alternatively, the base of the triangular pyramid 2A, the triangular pyramid 2B and the triangular pyramid 2C are all equilateral triangles, the three corner surfaces of each triangular pyramid 2A are all inclined at an angle of α / 2, the corner surfaces of the triangular pyramid 2B are all inclined at an angle of γ-α / 2, and the three corner surfaces of the triangular pyramid 2C are inclined at angles of α / 2, α / 2 and γ-α / 2 respectively, where in the sixth embodiment α = 70.50 degrees, β = 70.36 degrees, and γ = 0.5*(α+β) = 70.43 degrees.

[0106] The corner surface 2A101 of the triangular pyramid 2A1 is coplanar with the corner surface 2A201 of the triangular pyramid 2A2, the corner surface 2C101 of the triangular pyramid 2C1 is coplanar with the corner surface 2C201 of the triangular pyramid 2C2, the corner surface 2A102 of the triangular pyramid 2A1 is coplanar with the corner surface 2A301 of the triangular pyramid 2A3, the corner surface 2C301 of the triangular pyramid 2C3 is coplanar with the corner surface 2C202 of the triangular pyramid 2C2, the corner surface 2A202 of the triangular pyramid 2A2 is coplanar with the corner surface 2A302 of the triangular pyramid 2A3, the corner surface 2C302 of the triangular pyramid 2C3 is coplanar with the corner surface 2C102 of the triangular pyramid 2C1, the corner surface 2A303 of the triangular pyramid 2A3 is coplanar with the corner surface 2A401 of the triangular pyramid 2A4, the corner surface 2B001 of the triangular pyramid 2B is coplanar with the corner surface 2C303 of the triangular pyramid 2C3, the corner surface 2B002 of the triangular pyramid 2B is coplanar with the corner surface 2C103 of the triangular pyramid 2C1, and the corner surface 2A203 of the triangular pyramid 2A2 is coplanar with the corner surface 2A402 of the triangular pyramid 2A4.

[0107] The processing method of the sixth embodiment is similar to the above-mentioned processing steps 1-6, except that the first tool with a tool angle of a is used to process the two pairs of conical surfaces in steps 1-3, and the second tool with a tool angle of g is used in steps 4-6, and an offset angle D is adjusted to form an offset angle D between the center plane of the second tool and the normal plane of the mold base, D is not zero, so that the inclination angle of the one side of the tool is g / 2+D=a / 2, and the inclination angle of the other side of the tool is g / 2-D=g-a / 2= b / 2, and the inclination angle of the processed corner conical surface is the inclination angle of the two sides of the tool; or the second tool with a tool angle of g=0.5*(a+b) is used, so that the inclination angle of the one side of the tool is a / 2, and the inclination angle of the other side of the tool is b / 2, and the inclination angle of the processed corner conical surface is a / 2 and b / 2.

[0108] A specific processing example of the sixth embodiment: the first tool has a tool angle of a=70.50 degrees; the second tool is an asymmetric tool with a tool angle of g=70.41 degrees, with an inclination angle of 35.25 degrees on one side and an inclination angle of 35.16 degrees on the other side; first, the a tool is used to process the first-3 tools to form a large triangular pyramid platform (edge length 500 microns) according to the B-axis rotation angles of 0 degrees (or 180 degrees), 60 degrees (or 240 degrees), and 120 degrees (or 300 degrees) and an array of intercepts of 0.433 mm, and then the second tool is used to process the fourth-6 tools to form a composite micro-prism reflective film composed of an array of parallelogram units, each parallelogram unit containing eight three reflective surfaces with an edge length of 250 microns, which are combined into three different triangular pyramid micro-prism reflective films with two different inclination angles.

[0109] A specific processing example of the sixth embodiment: the first tool has a tool angle of a=70.50 degrees; the second tool is a symmetric tool with a tool angle of g=70.43 degrees, and an offset angle D=0.035 degrees is adjusted to make the inclination angle of the tool on one side 35.25 degrees and the inclination angle of the tool on the other side 35.18 degrees; first, the a tool is used to process the first-3 tools to form a large triangular pyramid platform (edge length 500 microns) according to the B-axis rotation angles of 0 degrees (or 180 degrees), 60 degrees (or 240 degrees), and 120 degrees (or 300 degrees) and an array of intercepts of 0.433 mm, and then the second tool is used to process the fourth-6 tools to form a composite micro-prism reflective film composed of an array of parallelogram units, each parallelogram unit containing eight three reflective surfaces with an edge length of 250 microns, which are combined into three different triangular pyramid micro-prism reflective films with two different inclination angles.

[0110] In order to verify the significant advantages of the above embodiments of the present application, a comparative example is provided as follows:

[0111] The tool edge angle of the comparative example is 70.50 degrees, the edge length of the triangular pyramid is 250 μm, and the B-axis rotation angle is 0 degrees (or 180 degrees), 60 degrees (or 240 degrees), and 120 degrees (or 300 degrees), respectively. The intercept is 216.5 μm. The array is processed into a conventional triangular pyramid micro-prism reflective film composed of the same parallel quadrilateral unit array. Each parallel quadrilateral unit is composed of two identical triangular pyramids.

[0112] Comparison of the retroreflective performance test data of the three samples:

[0113]

[0114] Technical advantage explanation: The comparative example is a conventional triangular pyramid micro-prism reflective film. Its retroreflective performance is mainly distributed at a small observation angle of 0.2 degrees. It cannot meet the requirements of the five categories (category V) under the test conditions of an incident angle of 30 degrees, an observation angle of 0.5 degrees and 1 degree, and an observation angle of 1 degree, an incident angle of -4 degrees and 15 degrees. The micro-prism reflective film prepared by the present application is composed of three different triangular pyramids. The retroreflective performance under the test conditions of large observation angles and large incident angles is optimized and improved, so that the retroreflective performance under all test conditions meets the requirements of the V category standard.

[0115] In addition, samples (or reflective film samples) prepared by using different tools and processing methods can also be used for performance detection to verify and compare the performance of the mold or reflective film obtained by the technical scheme of the present application.

[0116] The sixth embodiment of the present application has three triangular pyramids of the triangular pyramid 2A with an angle surface inclination angle of α / 2, the triangular pyramid 2B with an angle surface inclination angle of β / 2, and the "mixed" triangular pyramid 2C with three angle surface inclination angles of α / 2, α / 2 and β / 2. It has a design freedom of three triangular pyramids. The area ratios of the three triangular pyramids 2A, the triangular pyramid 2B and the triangular pyramid 2C are 50%, 12.5% and 37.5%, respectively. The performance under different application conditions can be further reasonably optimized, so that the wide-angle performance improvement, the overall comprehensive performance optimization and balance of the micro-prism reflective film with the traditional triangular pyramid unit structure and the double-triangular pyramid combined structure cannot be achieved.

[0117] The sixth embodiment of the present application has the following technical advantages.

[0118] From the optical design point of view, the increase of the optical design freedom means that the optical system can meet the performance indexes of more different application conditions at the same time. For the high-performance V type anti-reflection film, improving the wide-angle performance of large observation angle and large incidence angle, the performance of 90 degree and 0 degree azimuthal orientation and the optimization and balance thereof have been the focus of the research and development of the V type anti-reflection film technology. The anti-reflection film of the present application has three triangular pyramids with the angle cone inclination of alpha / 2, three triangular pyramids with the angle cone inclination of beta / 2 and three triangular pyramids with the angle cone inclination of alpha / 2, alpha / 2 and beta / 2 respectively. The design freedom of the three kinds of triangular pyramids is achieved, and the area ratio of the three kinds of triangular pyramids 2A, 2B and 2C is 50%, 12.5% and 37.5% respectively, so that the performance of different application conditions can be reasonably optimized, thereby the wide-angle performance improvement and the optimization and balance of the overall comprehensive performance which cannot be realized by the micro-prism anti-reflection film with the traditional triangular pyramid unit structure and the double triangular pyramid combined structure can be obtained.

[0119] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.

Claims

1. A composite microprismatic reflective film integrating multiple triangular prisms, characterized in that: The surface of the micro-prism light reflection film is formed by an array of same parallelogram unit bodies (1), each parallelogram unit body (1) is composed of three same triangular pyramids A, three same triangular pyramids B, one triangular pyramid C and one triangular pyramid D, the bottom surface of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C and the triangular pyramid D is a same equilateral triangle, the bottom area ratio of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C and the triangular pyramid D is 37.5%, 37.5%, 12.5% and 12.5% respectively; the three corner surface angles of the triangular pyramid A are α / 2, α / 2 and β / 2+△ respectively, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and β / 2-△ respectively, the three corner surface angles of the triangular pyramid C are β / 2+△ respectively, and the three corner surface angles of the triangular pyramid D are β / 2-△ respectively, and △ is greater than zero.

2. A composite microprismatic reflective film integrating multiple triangular prisms, characterized in that: The surface of the micro-prism light reflection film is formed by an array of same parallelogram unit bodies (1), each parallelogram unit body (1) is composed of three same triangular pyramids A, three same triangular pyramids B, one triangular pyramid C and one triangular pyramid D, the bottom surface of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C and the triangular pyramid D is a same equilateral triangle, the bottom area ratio of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C and the triangular pyramid D is 37.5%, 37.5%, 12.5% and 12.5% respectively; the three corner surface angles of the triangular pyramid A are α / 2, α / 2 and βL respectively, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and βR respectively, the three corner surface angles of the triangular pyramid C are βL respectively, and the three corner surface angles of the triangular pyramid D are βR respectively, and βL is not equal to βR.

3. A composite microprismatic reflective film integrating a plurality of triangular pyramids, characterized in that: The surface of the micro-prism light reflection film is formed by an array of same parallelogram unit bodies (1), each parallelogram unit body (1) is composed of two same triangular pyramids A, two same triangular pyramids B, two triangular pyramids C, one triangular pyramid D and one triangular pyramid E, the bottom surface of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C, the triangular pyramid D and the triangular pyramid E is a same equilateral triangle, the bottom area ratio of the triangular pyramid A, the triangular pyramid B, the triangular pyramid C, the triangular pyramid D and the triangular pyramid E is 25%, 25%, 25%, 12.5% and 12.5% respectively; the three corner surface angles of the triangular pyramid A are α / 2, the three corner surface angles of the triangular pyramid B are α / 2, α / 2 and β / 2+△ respectively, the three corner surface angles of the triangular pyramid C are α / 2, α / 2 and β / 2-△ respectively, the three corner surface angles of the triangular pyramid D are α / 2, β / 2+△ and β / 2+△ respectively, and the three corner surface angles of the triangular pyramid E are α / 2, β / 2-△ and β / 2-△ respectively, and △ is greater than zero.

4. A microprismatic film comprising a plurality of triangular prisms, wherein the microprismatic film comprises a plurality of microprismatic films, each microprismatic film comprising a plurality of triangular prisms, and wherein the plurality of triangular prisms of each microprismatic film are oriented in a different direction. The surface of the micro-prism light reflecting film is formed by an array of identical parallelogram unit bodies (1), each parallelogram unit body (1) is composed of two identical triangular pyramids A, two identical triangular pyramids B, two triangular pyramids C, one triangular pyramid D and one triangular pyramid E, the base of the triangular pyramids A, B, C, D and E are all identical equilateral triangles, the base area ratio of the triangular pyramids A, B, C, D and E are 25%, 25%, 25%, 12.5% and 12.5% respectively; the three corner angles of the triangular pyramid A are all α / 2, the three corner angles of the triangular pyramid B are α / 2, α / 2 and βL respectively, the three corner angles of the triangular pyramid C are α / 2, α / 2 and βR respectively, the three corner angles of the triangular pyramid D are α / 2, βL and βL respectively, the three corner angles of the triangular pyramid E are α / 2, βR and βR respectively, and βL is not equal to βR.

5. A manufacturing method of a mold for a composite micro-prism light reflecting film integrating multiple triangular pyramids, the mold being used for manufacturing the micro-prism light reflecting film integrating three triangular pyramids as claimed in any one of claims 1-4, characterized in that: The mold base (K1) is horizontally installed on a workbench (K2), the workbench can drive the mold base to move along the horizontal X-axis and Y-axis, and a B-axis turntable on the workbench can drive the mold base to rotate around the normal line B-axis of the mold base, a main shaft (K3) parallel to the upper surface of the mold base is arranged above the mold base, and a fly cutter head (K4) fixedly connected with the main shaft is arranged on the main shaft, a cutter (K5) is installed on the fly cutter head, and the cutter can rotate around the Y-axis under the driving of the main shaft, and the specific steps in the manufacturing are as follows: Step 1: rotate the mold base on the B-axis turntable to 0 degrees, use the first cutter with an angle of α installed on the fly cutter head to process two side corner surfaces, i.e. corner surfaces γ1-1 and γ1-2, of the parallelogram unit body, the inclination angles of the two corner surfaces are both α / 2, the first cutter is a symmetrical cutter, and the two side corner surfaces have the same inclination angle; Step 2: rotate the mold base on the B-axis turntable to 120 degrees, use the first cutter with an angle of α installed on the fly cutter head to process the other two side corner surfaces, i.e. corner surfaces γ2-1 and γ2-2, of the parallelogram unit body, the inclination angles of the two corner surfaces are both α / 2; Step 3: rotate the mold base on the B-axis turntable to 240 degrees or 60 degrees, use the first cutter with an angle of α installed on the fly cutter head to process two pairs of corner surfaces, i.e. corner surfaces γ3-1 and γ3-2, of the parallelogram unit body (1), the inclination angles of the two corner surfaces are both α / 2; Step 4: after the processing in step 3, rotate the mold base to 0 degrees, and use the cutter to process corner surfaces γ4-1 and γ4-2; Step 5: sequentially rotate the mold base to 120 degrees, and use the cutter to process corner surfaces γ5-1 and γ5-2; Step 6: sequentially rotate the mold base to 240 degrees or 60 degrees, and use the cutter to process corner surfaces γ6-1 and γ6-2; The second tool is a symmetric tool with a tool angle of β, and the second tool is installed on the tool holder of the working spindle, and an adjustable angle of deviation Δ exists between the mechanical shaft of the tool holder and the second tool, so that the angles of the two sides of the tool are β / 2+Δ and β / 2-Δ, and the angles of the pyramidal surfaces machined on the left and right sides of the tool are β / 2+Δ and β / 2-Δ, respectively. Alternatively, the second tool is an asymmetric tool with a tool angle of β, and the angles of the left and right sides of the second tool are βL and βR, respectively, so that the angles of the pyramidal surfaces machined on the left and right sides of the tool are βL and βR, respectively.

6. A microprismatic film comprising a plurality of triangular prisms, wherein the microprismatic film comprises a plurality of microprismatic films. The surface of the micro-prism light-reflecting film is formed by an array of identical parallelogram unit bodies (1), each of which is composed of four identical triangular pyramids 1A, two mixed triangular pyramids 1B and two mixed triangular pyramids 1C, the base of each of the triangular pyramids 1A, the mixed triangular pyramids 1B and the mixed triangular pyramids 1C is an equilateral triangle, the angles of the three pyramidal surfaces of each of the triangular pyramids 1A are α / 2, the angles of the pyramidal surfaces of the mixed triangular pyramids 1B are α / 2, α / 2 and βL, the angles of the three pyramidal surfaces of the mixed triangular pyramids 1C are α / 2, α / 2 and βR, respectively, and βL is not equal to βR; the triangular pyramids 1A are triangular pyramids 1A1, 1A2, 1A3 and 1A4, respectively, the mixed triangular pyramids 1B are triangular pyramids 1B1 and 1B2, respectively, and the mixed triangular pyramids 1C are triangular pyramids 1C1 and 1C2, respectively; the first row of the parallelogram unit bodies (1) is sequentially arranged as triangular pyramids 1A3, 1A4, 1C2 and 1B2, the second row of the parallelogram unit bodies (1) is sequentially arranged as triangular pyramids 1C1, 1B1, 1A1 and 1A2, and the directions of the adjacent triangular pyramids are 180 degrees apart.

7. A manufacturing method of a mold for a composite micro-prism light-reflecting film integrated with multiple triangular pyramids, for manufacturing the mold for the composite micro-prism light-reflecting film integrated with multiple triangular pyramids as claimed in claim 6, characterized in that: Steps 1-5 use a first tool with a tool angle of α to machine two pairs of pyramidal surfaces, and step 6 uses a second tool with an asymmetric structure and a tool angle of β, the left side of the tool has an angle of βL, the right side of the tool has an angle of βR, βL is not equal to βR, the triangular pyramidal reflecting surface machined by the left side of the tool has an angle of βL, and the triangular pyramidal reflecting surface machined by the right side of the tool has an angle of βR.

8. A microprismatic film comprising a plurality of triangular prisms, wherein the microprismatic film is a composite microprismatic film. The surface of the micro-prism light reflection film is formed by an array of identical parallelogram unit bodies (1), each of which is composed of four identical pyramids 2A, one pyramid 2B and three identical pyramids 2C, the orientations of the four pyramids 2A are 180 degrees to the orientations of the three pyramids 2C and the pyramid 2B, and the three pyramids 2C are arranged between the four pyramids 2A with a staggered arrangement; the base of the pyramid 2B and the pyramid 2C are identical equilateral triangles, the three corner surfaces of each pyramid 2A have an inclination angle of α / 2, the corner surfaces of the pyramid 2B have an inclination angle of β / 2, and the three corner surfaces of the pyramid 2C have inclination angles of α / 2, α / 2 and β / 2 respectively; the pyramids 2A are pyramids 2A1, 2A2, 2A3 and 2A4 respectively, the pyramids 2C are pyramids 2C1, 2C2 and 2C3 respectively, the first row of the parallelogram unit bodies (1) are sequentially arranged as the pyramid 2A3, the pyramid 2C1, the pyramid 2A4 and the pyramid 2C2, the second row of the parallelogram unit bodies (1) are sequentially arranged as the pyramid 2A1, the pyramid 2B, the pyramid 2A2 and the pyramid 2C3, and the orientations of adjacent pyramids are 180 degrees to each other.

9. A manufacturing method of a mold for a composite micro-prism light reflection film integrating multiple pyramids, for manufacturing the mold for the composite micro-prism light reflection film integrating multiple pyramids according to claim 8, characterized in that: Steps 1-3 use a first tool with a tool angle of α to process the two pairs of corner surfaces, and steps 4-6 use a second tool with a tool angle of γ, and a bias angle Δ is adjusted for the tool, i.e. the symmetric center surface of the second tool forms a bias angle Δ with the normal surface of the mold base, Δ is not zero, so that the inclination angle of the blade on one side of the tool angle is γ / 2+Δ=α / 2, and the inclination angle of the blade on the other side is γ / 2-Δ=γ-α / 2=β / 2, and the inclination angles of the processed corner surfaces are the inclination angles α / 2 or β / 2 of the two sides of the tool.

10. A microprismatic film comprising a plurality of triangular prisms, wherein the microprismatic film is a composite microprismatic film. The surface of the micro-prism light reflection film is formed by an array of identical parallelogram unit bodies (1), each of which is composed of four identical three-prism pyramids 2A, one three-prism pyramid 2B and three identical three-prism pyramids 2C, the orientations of the four three-prism pyramids 2A being 180 degrees different from those of the three three-prism pyramids 2C and the three-prism pyramid 2B, the three three-prism pyramids 2C being arranged between the four three-prism pyramids 2A with an interval; the base of the three-prism pyramid 2B and the base of the three-prism pyramid 2C are identical equilateral triangles, the three corner surfaces of each three-prism pyramid 2A have an inclination angle of α / 2, the corner surfaces of the three-prism pyramid 2B have an inclination angle of γ-α / 2, and the three corner surfaces of the three-prism pyramid 2C have inclination angles of α / 2, α / 2 and γ-α / 2 respectively; the three-prism pyramids 2A are three-prism pyramids 2A1, 2A2, 2A3 and 2A4 respectively, the three-prism pyramids 2C are three-prism pyramids 2C1, 2C2 and 2C3 respectively, the first row of the parallelogram unit bodies (1) is sequentially arranged as three-prism pyramid 2A3, three-prism pyramid 2C1, three-prism pyramid 2A4 and three-prism pyramid 2C2, the second row of the parallelogram unit bodies (1) is sequentially arranged as three-prism pyramid 2A1, three-prism pyramid 2B, three-prism pyramid 2A2 and three-prism pyramid 2C3, and the orientations of the adjacent three-prism pyramids are 180 degrees different.

11. A manufacturing method of a mold for a composite micro-prism light reflection film integrating multiple three-prism pyramids, for manufacturing the mold for the composite micro-prism light reflection film integrating multiple three-prism pyramids according to claim 10, characterized in that: Steps 1-3 use a first tool with a tool angle of α to process the two pairs of corner surfaces, and steps 4-6 use a second tool with a tool angle of γ=0.5*(α+β) to process the corner surfaces, so that the inclination angle of the blade on one side of the tool angle is α / 2, and the inclination angle of the blade on the other side of the tool angle is β / 2, and the inclination angles of the processed corner surfaces are α / 2 and β / 2.

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