A multi-directional micro-groove structure superposition modulation structural color processing method

Abstract

The application belongs to the technical field of machining and provides a multi-directional micro-groove structure superposition modulation structural color machining method, which comprises the following steps: determining a first interval between two adjacent first grooves to be machined according to first preset information; machining a plurality of parallel first grooves on the surface of a workpiece according to the first interval; determining a second interval between two adjacent second grooves to be machined according to second preset information; and machining a plurality of parallel second grooves on the surface of the workpiece according to the second interval, wherein the length direction of the first grooves is not parallel to the length direction of the second grooves. The application is conducive to improving the depth of the color presented by the surface of the workpiece and can also present a plurality of different colors, thereby being conducive to realizing more color levels or the display of complex color effects.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of machining, in particular to a multi-directional micro-groove structure superimposed modulation structural color machining method. BACKGROUND

[0002] Research on structural color is driven by the inspiration from nature. Studies have shown that these colors are usually formed by micrometer or nanometer periodic structures, which reflect light of specific wavelengths, thereby producing bright colors. For example, the multilayer interference structure in bird feathers and butterfly wings, and the quasi-crystal structure in beetle shells, all provide references for bionic design. Material surface structural color mainly controls the micrometer or nanometer structure on the surface to produce specific optical effects, thereby realizing the regulation of color. At present, the preparation method of material surface structural color mainly relies on ultra-precision machining, and ultra-precision fly cutting becomes an effective means to prepare a structural color surface due to its high precision and flexibility. However, in the process of machining the structural color surface, there may be a problem of insufficient color depth, and the color presented by the structural color is single, which cannot exhibit more color levels or complex color effects. SUMMARY

[0003] The purpose of the embodiment of the application is to provide a multi-directional micro-groove structure superimposed modulation structural color machining method, aiming to solve the technical problems of insufficient color depth in the process of machining the structural color surface and single color presented by the structural color in the related art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0005] The application provides a multi-directional micro-groove structure superimposed modulation structural color machining method, comprising:

[0006] According to the first preset information, a first interval between two adjacent first grooves to be machined is determined;

[0007] According to the first interval, a plurality of first grooves arranged in parallel are machined on the surface of the workpiece;

[0008] According to the second preset information, a second interval between two adjacent second grooves to be machined is determined;

[0009] According to the second interval, a plurality of second grooves arranged in parallel are machined on the surface of the workpiece, and the length direction of the first groove is not parallel to the length direction of the second groove.

[0010] In a possible design, the multi-directional micro-groove structure superimposed modulation structural color machining method further comprises:

[0011] According to the third preset information, a third interval between two adjacent third grooves to be processed is determined;

[0012] According to the third interval, a plurality of third grooves arranged in parallel are processed on the surface of the workpiece, the length direction of the first groove is not parallel to the length direction of the third groove, and the length direction of the second groove is not parallel to the length direction of the third groove.

[0013] In a possible design, the first preset information includes a first incident angle, a first diffraction angle, and a wavelength of a first light;

[0014] The second preset information includes a second incident angle, a second diffraction angle, and a wavelength of a second light.

[0015] In a possible design, the third preset information includes a third incident angle, a third diffraction angle, and a wavelength of a third light.

[0016] In a possible design, the depth of the first groove, the depth of the second groove, and the depth of the third groove are equal;

[0017] Or, the depth of at least one of the depth of the first groove, the depth of the second groove, and the depth of the third groove is different from the depth of the other two.

[0018] In a possible design, the first preset information, the second preset information, and the third preset information are the same;

[0019] Or, the first preset information, the second preset information, and the third preset information are all different.

[0020] In a possible design, the angle between the length direction of the first groove and the length direction of the second groove is 30°, 45°, 60°, 90°, or 120°.

[0021] In a possible design, the angle between the length direction of the second groove and the length direction of the third groove is 120°.

[0022] In a possible design, the first groove is a straight-line groove, the second groove is a straight-line groove, and the third groove is a straight-line groove.

[0023] In a possible design, the cross section of the first groove is V-shaped or arc-shaped, the cross section of the second groove is V-shaped or arc-shaped, and the cross section of the third groove is V-shaped or arc-shaped.

[0024] The multi-directional micro-groove structure superimposed modulation structural color processing method has the beneficial effects that: a plurality of first grooves arranged in parallel are processed on the surface of the workpiece, and a plurality of second grooves arranged in parallel are staggered with the first grooves, so that the depth of the color presented by the surface of the workpiece is improved, and the control of the first interval and the second interval can present a plurality of different colors, thereby facilitating the realization of more color levels or the display of complex color effects. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a schematic diagram for determining the interval of two adjacent grooves in the embodiments of the present application;

[0027] Figure 2 is a flowchart of the multi-directional micro-groove structure superimposed modulation structural color processing method provided by the embodiments of the present application;

[0028] Figure 3 is a schematic diagram of the first tool processing the surface of the workpiece in two-direction processing in the embodiments of the present application;

[0029] Figure 4 is a schematic diagram of the second tool processing the surface of the workpiece in two-direction processing in the embodiments of the present application;

[0030] Figure 5 is another schematic diagram of the second tool processing the surface of the workpiece in two-direction processing in the embodiments of the present application;

[0031] Figure 6 is another schematic diagram of the second tool processing the surface of the workpiece in two-direction processing in the embodiments of the present application;

[0032] Figure 7 is still another schematic diagram of the second tool processing the surface of the workpiece in two-direction processing in the embodiments of the present application;

[0033] Figure 8 is still another flowchart of the multi-directional micro-groove structure superimposed modulation structural color processing method provided by the embodiments of the present application;

[0034] Figure 9 is a schematic diagram of the first tool processing the surface of the workpiece in three-direction processing in the embodiments of the present application;

[0035] Figure 10is a schematic view of the surface of the workpiece machined by the second cutter in the three-direction machining of the embodiment of the present application;

[0036] Figure 11 is a schematic view of the surface of the workpiece machined by the third cutter in the three-direction machining of the embodiment of the present application;

[0037] Figure 12 is a state view of the workpiece after the first groove, the second groove and the third groove are machined in the embodiment of the present application;

[0038] Figure 13 is a schematic view of the first groove machined by a taper cutter in the embodiment of the present application;

[0039] Figure 14 is a schematic view of the second groove machined by a ball-end cutter in the embodiment of the present application;

[0040] Figure 15 is another schematic view of the first groove machined by a taper cutter in the embodiment of the present application;

[0041] Figure 16 is a schematic view of the first groove machined by a taper cutter in the embodiment of the present application.

[0042] Main figure mark explanation:

[0043] 100, workpiece; 101, groove; 102, turntable; 103, ball-end cutter; 104, taper cutter; 105, first cutter; 106, second cutter; 107, third cutter; 108, first groove; 109, second groove. DETAILED DESCRIPTION

[0044] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0045] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0047] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0048] In the related art, the preparation method of the material surface structural color mainly relies on ultra-precision machining, and ultra-precision fly cutting becomes an effective means for preparing a structural color surface due to its high precision and flexibility. However, the structural color surface obtained by single-direction fly cutting may have poor effect and light color; at the same time, the effect of the structural color surface obtained by single-direction fly cutting is single, the color is single, and it is difficult to process certain specific colors, and it is unable to exhibit more color levels or complex color effects.

[0049] Therefore, the embodiments of the present application provide a multi-directional micro-groove structure superimposed modulation structural color processing method to solve the problems in the related art. The following will be described in detail in combination with specific drawings and embodiments.

[0050] In combination with Figures 2 to 7 As shown in the drawings, in one or more embodiments, the present application provides a multi-directional micro-groove structure superimposed modulation structural color processing method, which can realize superimposition of micro-groove structures in multiple directions to realize modulation of structural colors. The structural color processing method comprises the following steps:

[0051] S101, determining a first interval d1 between two adjacent first grooves 108 to be processed according to first preset information.

[0052] S102, machining a plurality of first grooves 108 arranged in parallel on the surface of the workpiece 100 according to the first interval.

[0053] S103, determining a second interval d2 between two adjacent second grooves 109 to be processed according to second preset information.

[0054] S104, machining a plurality of second grooves 109 arranged in parallel on the surface of the workpiece 100 according to the second interval, the length direction of the first grooves 108 and the length direction of the second grooves 109 are not parallel.

[0055] The multi-directional micro-groove structure superposition modulation structural color processing method provided by the embodiments of the present application can machine a plurality of first grooves 108 arranged in parallel on the surface of the workpiece 100, and a plurality of second grooves 109 arranged in parallel intersecting the first grooves 108, which is beneficial to improve the depth of the color presented by the surface of the workpiece 100, and the control of the first interval and the second interval can present a plurality of different colors, thereby facilitating the realization of more color levels or the display of complex color effects.

[0056] In some embodiments, the workpiece 100 can be installed on a high-precision turntable 102 with an angle that can be freely adjusted, so that the workpiece 100 can be driven to rotate by the rotation of the turntable 102, and the surface of the workpiece 100 is a plane. In the plurality of first grooves 108 arranged in parallel, the interval between the two adjacent first grooves 108 is the first interval, that is, the plurality of first grooves 108 are arranged at equal intervals; in the plurality of second grooves 109 arranged in parallel, the interval between the two adjacent second grooves 109 is the second interval, that is, the plurality of second grooves 109 are arranged at equal intervals. The interval between the two adjacent first grooves 108 can be the distance between the midpoints of the width directions of the two first grooves 108; the arrangement direction of the plurality of first grooves 108 machined is perpendicular to the length direction of the first grooves 108. The interval between the two adjacent second grooves 109 can be the distance between the midpoints of the width directions of the two second grooves 109; the arrangement direction of the plurality of second grooves 109 machined is perpendicular to the length direction of the second grooves 109. The processing method of the first grooves 108 can be formed by cutting process or by laser processing process; when the first grooves 108 are processed by cutting process, the first tool 105 can be used to cut the first grooves 108 on the surface of the workpiece 100, as shown in Figure 3 The processing method of the second grooves 109 can be formed by cutting process or by laser processing process. When the second grooves 109 are processed by cutting process, the second tool 106 can be used to cut the second grooves 109 on the surface of the workpiece 100, which is not limited in the present application, and the cutting tool 106 is shown in Figures 4 to 7 The processing method of the second grooves 109 can be formed by cutting process or by laser processing process. When the second grooves 109 are processed by cutting process, the second tool 106 can be used to cut the second grooves 109 on the surface of the workpiece 100, which is not limited in the present application, and the cutting tool 106 is shown in

[0057] Referring to Figure 1As shown, in the embodiment of the present application, the structural color of the surface of the workpiece 100 corresponds to the wavelength of the diffracted light, and the wavelength of the diffracted light depends on the diffraction angle (diffraction angle) and the pitch of the groove 101, wherein the diffraction angle depends on the incident angle of the illumination light and the observation angle of the observer, and the diffraction angle is also the observation angle of the observer, and the corresponding structural color can be seen from the observation angle. According to the grating equation:

[0058]

[0059] wherein m represents the diffraction order, and λ represents the wavelength of the light, θ i represents the angle between the incident light and the normal of the surface of the workpiece 100, and θ v represents the angle between the diffracted light and the normal of the surface of the workpiece 100; when the incident angle θ i and the diffraction angle θ v are given constant values, the pitch d of the corresponding groove can be calculated by the wavelength λ of the light, for example, when the incident angle θ i and the diffraction angle θ v are given, and the wavelength λ of the light of the required color, the pitch d of the corresponding groove 101 can be calculated. Therefore, in the embodiment of the present application, the first preset information includes the first incident angle, the first diffraction angle, and the wavelength of the first light; the second preset information includes the second incident angle, the second diffraction angle, and the wavelength of the second light, so that the workpiece 100 can present the required color, that is, the color corresponding to the wavelength of the first light and the wavelength of the second light. According to the first preset information and the grating equation, the pitch of the first groove 108 can be calculated, and according to the second preset information and the grating equation, the pitch of the second groove 109 can be calculated.

[0060] In some embodiments, in step S104, the method for machining a plurality of parallelly arranged second grooves 109 on the surface of the workpiece 100 according to the second pitch includes: S1041, rotating the workpiece 100 by a first set angle relative to the tool holder on which the second tool 106 is arranged; S1042, machining a plurality of parallelly arranged second grooves 109 on the surface of the workpiece 100 by using the second tool 106. The first tool 105 and the second tool 106 are installed on the tool holder; when it is required that the length direction of the first groove 108 is not parallel to the length direction of the second groove 109, the tool holder can be rotated or the workpiece 100 can be rotated to realize that the length direction of the machined first groove 108 is not parallel to the length direction of the second groove 109.

[0061] In some embodiments, the angle between the length direction of the first groove 108 and the length direction of the second groove 109 is 30°, 45°, 60° or 90°, so that the superposition of the micro groove structure is realized by the composite machining of the two directions, thereby realizing the modulation of the structural color to realize the superposition of the same color or the superposition of different colors. The first preset angle is 30°, 45°, 60°, 90° or 120°. When the first preset information and the second preset information are the same, the first interval d1 and the second interval d2 are equal, and when the first interval d1 and the second interval d2 are the same, the colors processed twice are the same, which can play a color overlapping role to realize the purpose of processing a more vivid color. When the first preset information and the second preset information are different, the first interval d1 and the second interval d2 can be different, and when the first interval d1 and the second interval d2 are different, the colors processed twice are different, which can realize the composition of the colors to realize the presentation of certain specific colors through different proportions. When the first interval d1 and the second interval d2 are the same, the first tool 105 and the second tool 106 can adopt the same type of tool or different types of tools; and when the first interval d1 and the second interval d2 are the same, the depth of the first groove 108 and the depth of the second groove 109 can be equal or unequal. For example, the first interval d1 and the second interval d2 are the same, the first tool 105 and the second tool 106 are different, and the depth of the first groove 108 and the depth of the second groove 109 are the same. For another example, the first interval d1 and the second interval d2 are the same, the first tool 105 and the second tool 106 are different, and the depth of the first groove 108 and the depth of the second groove 109 are different.

[0062] Referring to FIG. 1, the first groove 108 is machined by the first tool 105. Figure 4 As shown in FIG. 2, after the first groove 108 is machined, the turntable 102 is rotated by 30°, and the second tool 106 can machine a plurality of second grooves 109 with a 30° included angle with the first groove 108.

[0063] Referring to FIG. 3, the first groove 108 is machined by the first tool 105. Figure 5 As shown in FIG. 4, after the first groove 108 is machined, the turntable 102 is rotated by 45°, and the second tool 106 can machine a plurality of second grooves 109 with a 45° included angle with the first groove 108.

[0064] Referring to FIG. 5, the first groove 108 is machined by the first tool 105. Figure 6 As shown in FIG. 6, after the first groove 108 is machined, the turntable 102 is rotated by 60°, and the second tool 106 can machine a plurality of second grooves 109 with a 60° included angle with the first groove 108.

[0065] Referring to FIG. 7, the first groove 108 is machined by the first tool 105. Figure 7As shown, after the first groove 108 is cut, the second cutter 106 can be used to cut a plurality of second grooves 109 with a 90° included angle with the first groove 108 after the rotating disc 102 is rotated by 90°.

[0066] It should be noted that the depth and flatness of the groove wall of the first groove 108 and the second groove 109 affect the saturation of the structural color, the deeper the depth, the better the diffraction effect; therefore, by controlling the depth of the first groove 108 and the depth of the second groove 109, the saturation of the required structural color can be controlled; and for two kinds of light, the pitch of the grooves corresponding to the two kinds of light is the same, but the depth of the grooves and the flatness of the groove wall can make the saturation of the color different, for example, to present deep blue, cyan blue, light blue, purple blue and the like.

[0067] In some embodiments, the first cutter 105 is a ball end mill 103 or a tapered mill 104, and the second cutter 106 is a ball end mill 103 or a tapered mill 104. When the first cutter 105 is a ball end mill 103, the cross section of the first groove 108 can be arc-shaped; when the first cutter 105 is a tapered mill 104, the cross section of the first groove 108 can be V-shaped. When the second cutter 106 is a ball end mill 103, the cross section of the second groove 109 can be arc-shaped; when the second cutter 106 is a tapered mill 104, the cross section of the second groove 109 can be V-shaped; by controlling the shape of the cross section of the first groove 108 and the cross section of the second groove 109, the saturation of the same structural color can be adjusted.

[0068] In combination Figures 8 to 11 As shown, in some embodiments, after step S104, the multi-directional micro-groove structure superposition modulation structural color processing method further comprises the following steps:

[0069] S105, determining a third pitch between two adjacent third grooves to be processed according to third preset information;

[0070] S106, processing a plurality of third grooves arranged in parallel on the surface of the workpiece 100 according to the third pitch, the length direction of the first groove 108 and the length direction of the third groove are not parallel, and the length direction of the second groove 109 and the length direction of the third groove are not parallel. On the basis of the superposition of the structural colors in two directions, the superposition of the structural colors in one more direction, i.e. the superposition of the structural colors in three directions, can realize the combination of more colors, so as to realize the fine color adjustment and the accurate processing of specific colors.

[0071] In some embodiments, the third grooves are arranged in parallel, and the distance between any two adjacent third grooves is the third distance, i.e., the third grooves are arranged at equal distances. The distance between any two adjacent third grooves can be the distance between the midpoints of the width directions of the two third grooves. The third grooves are arranged in a direction perpendicular to the length direction of the third grooves. The third grooves can be formed by a cutting process or a laser processing process. When the third grooves are formed by a cutting process, the third tool 107 can be used to cut the third grooves on the surface of the workpiece 100.

[0072] In some embodiments, the third preset information includes a third incident angle, a third diffraction angle, and a wavelength of the third light. According to the third preset information and the grating equation, the distance between the third grooves can be calculated, so that the workpiece 100 can present a color corresponding to the wavelength of the third light.

[0073] In some embodiments, in step S106, the method for machining the third grooves on the surface of the workpiece 100 according to the third distance includes: S1061, rotating the workpiece 100 by a second set angle relative to the tool holder on which the third tool 107 is installed; and S1062, machining the third grooves on the surface of the workpiece 100 by using the third tool 107. When the length direction of the first groove 108 is not parallel to the length direction of the third groove, and the length direction of the second groove 109 is not parallel to the length direction of the third groove, the tool holder can be rotated or the workpiece 100 can be rotated.

[0074] In some embodiments, the third tool 107 is a ball-end mill 103 or a conical mill 104. When the third tool 107 is the ball-end mill 103, the cross section of the third groove can be arc-shaped. When the third tool 107 is the conical mill 104, the cross section of the third groove can be V-shaped. The shape of the cross section of the third groove can be controlled to adjust the saturation of the same structural color.

[0075] In some embodiments, the angle between the length direction of the second groove 109 and the length direction of the first groove 108 is 120°; the angle between the length direction of the second groove 109 and the length direction of the third groove is 120°. For example, before processing the second groove 109, the workpiece 100 is rotated clockwise by 120°, i.e., the first set angle is 120°, and then a plurality of second grooves 109 are processed, so that the angle between the length direction of the second groove 109 and the length direction of the first groove 108 is 120°. After the second groove 109 is processed, the workpiece 100 is rotated clockwise by 120° before processing the third groove, i.e., the second set angle is 120°, and then a plurality of third grooves are processed, so that the angle between the length direction of the third groove and the length direction of the second groove 109 is 120°. Through the two rotations, the first groove 108, the second groove 109 and the third groove are arranged to intersect each other, so as to realize the three-direction structural color superposition.

[0076] Figure 9 is a schematic view of the first tool 105 cutting a plurality of first grooves 108 in the three-direction structural color superposition embodiment; Figure 10 is a schematic view of the second tool 106 cutting a plurality of second grooves 109 after the workpiece is rotated clockwise by 120° after cutting a plurality of first grooves 108; Figure 11 is a schematic view of the third tool 107 cutting a plurality of third grooves after the workpiece is rotated clockwise by 120° after cutting the second groove 109; Figure 12 is a schematic view of the third tool 107 cutting a plurality of third grooves after the workpiece is rotated clockwise by 120° after cutting the second groove 109; Figure 8 is a schematic view of the third tool 107 cutting a plurality of third grooves after the workpiece is rotated clockwise by 120° after cutting the second groove 109;

[0077] In some embodiments, when the first preset information, the second preset information and the third preset information are the same, the first interval d1, the second interval d2 and the third interval d3 are equal, so that the same color is processed, and the color overlap can be achieved to realize the purpose of processing a more vibrant color. When the first preset information, the second preset information and the third preset information are all different, the first interval d1, the second interval d2 and the third interval d3 are all different, so that three different structural colors are obtained; when the first light is red light, the second light is green light and the third light is blue light, the three-direction composite processing is used to process grooves with intervals corresponding to the red light wavelength, the green light wavelength and the blue light wavelength respectively, so as to realize the color adjustment of the corresponding proportion to form the effect of RGB color adjustment.

[0078] In some embodiments, the depths of the plurality of first grooves 108 are equal, so that the structural color can exhibit more uniform and consistent color effects. The depths of the plurality of second grooves 109 are equal, so that the structural color can exhibit more uniform and consistent color effects. The depths of the plurality of third grooves are equal, so that the structural color can exhibit more uniform and consistent color effects. It should be noted that in some other possible embodiments, the depths of the plurality of first grooves 108 can increase in sequence along the arrangement direction, so as to present a gradient effect. Similarly, the depths of the plurality of second grooves 109 can increase in sequence along the arrangement direction, so as to present a gradient effect. The depths of the plurality of third grooves can increase in sequence along the arrangement direction, so as to present a gradient effect.

[0079] In some embodiments, the depths of the first grooves 108, the depths of the second grooves 109, and the depths of the third grooves are equal, so that the structural color after compounding can exhibit more uniform and consistent color effects. For example, when the first pitch d1, the second pitch d2, and the third pitch d3 are equal, and the depths of the first grooves 108, the depths of the second grooves 109, and the depths of the third grooves are equal, the same color of light can be processed, and the color can be more saturated and bright by relying on the structural color superposition. It should be noted that since the structural color mainly comes from the groove morphology quality of the workpiece 100, the better the groove quality is, the better the diffraction effect is.

[0080] In combination with Figure 13 and Figure 14 For example, when the first pitch d1, the second pitch d2, and the third pitch d3 are not equal, and the depths of the first grooves 108, the depths of the second grooves 109, and the depths of the third grooves are equal, the first tool 105, the second tool 106, and the third tool 107 are different tools respectively, the grooves can affect the diffraction efficiency and change the saturation of light, so that the color density corresponding to different light can be changed, and a RGB-like modulation effect can be realized.

[0081] In some other embodiments, the depths of at least one of the depths of the first grooves 108, the depths of the second grooves 109, and the depths of the third grooves are different from the depths of the other two, so that the color can be adjusted as needed. For example, when the first pitch d1, the second pitch d2, and the third pitch d3 are equal, the depths of the first grooves 108, the depths of the second grooves 109, and the depths of the third grooves are different, for example, the depths of the first grooves 108, the depths of the second grooves 109, and the depths of the third grooves gradually increase, so as to visually present a gradient color or a color change. In combination with Figure 15 and Figure 16When the first distance d1, the second distance d2 and the third distance d3 are all equal, the depth h1 of the first groove 108, the depth h2 of the second groove 109 and the depth of the third groove are all different, and the first tool 105, the second tool 106 and the third tool 107 are all different tools, the color density corresponding to different light can also be changed, and the modulation effect similar to RGB can be realized. It should be noted that, in the embodiment, the first distance d1, the second distance d2 and the third distance d3 are all equal, and the first tool 105, the second tool 106 and the third tool 107 are all different tools. However, the first distance d1, the second distance d2 and the third distance d3 can also be different, and the first tool 105, the second tool 106 and the third tool 107 can also be the same tool. Figures 13 to 15 b represents the included angle between the line connecting the bottom of the cross section of the groove and the top edge of the groove and the surface of the workpiece. Since the types of the tools are different, the shapes of the cross sections of the formed grooves (the first groove, the second groove and the third groove) are different, and the sizes of θ b are different.

[0082] In some embodiments, the first groove 108 is a straight-line groove, the second groove 109 is a straight-line groove, and the third groove is a straight-line groove, which is convenient for processing.

[0083] In some embodiments, the depth of the first groove 108 can be 1-20 microns, for example, 1 micron, 5 microns, 6 microns, 8 microns, 10 microns, 15 microns or 20 microns. The depth of the second groove 109 can be 1-20 microns, for example, 1 micron, 5 microns, 6 microns, 8 microns, 10 microns, 15 microns or 20 microns. The depth of the third groove can be 1-20 microns, for example, 1 micron, 5 microns, 6 microns, 8 microns, 10 microns, 15 microns or 20 microns.

[0084] In summary, the structural color processing method based on ultra-precision fly cutting in the embodiments of the present application obtains a surface with structural color through multi-angle composite processing, so that the surface of the workpiece 100 has bright colors or the same color in multiple directions, and the structural color can be better applied to display devices, anti-fake devices and functional decorations. It should be noted that, in the manner of superimposing structural colors in three directions, condition 1: the first distance d1, the second distance d2 and the third distance d3 are all different or all equal, condition 2: the depth of the first groove 108, the depth of the second groove 109 and the depth of the third groove are all different or all equal, and condition 3: the first tool 105, the second tool 106 and the third tool 107 are all different tools or all the same tool, the three conditions can be combined respectively to form different color modulation effects, and the present application will not be described in detail.

[0085] The above are only optional embodiments of the present application and do not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. A method for processing a multi-directional microgroove structure superimposed structural color, characterized in that, The method comprises the following steps: According to the first preset information, the first interval between two adjacent first grooves to be machined is determined, wherein the first preset information includes the first incident angle, the first diffraction angle and the wavelength of the first light; According to the first interval, a plurality of parallel first grooves are machined on the surface of the workpiece; According to the second preset information, the second interval between two adjacent second grooves to be machined is determined, wherein the second preset information includes the second incident angle, the second diffraction angle and the wavelength of the second light; According to the second interval, a plurality of parallel second grooves are machined on the surface of the workpiece, and the length direction of the first groove is not parallel to the length direction of the second groove; The structural color of the surface of the workpiece corresponds to the wavelength of the diffracted light, the wavelength of the diffracted light depends on the diffraction angle and the interval of the groove, and the diffraction angle is the observation angle of the observer, according to the grating equation: ， wherein denotes the order of diffraction, and denotes the wavelength of the light, denotes the angle of incidence of the light, denotes the angle between the diffracted light and the normal to the surface of the workpiece; when the angle of incidence of the light and the angle of diffraction are given constant values, the pitch of the corresponding grooves is calculated by the wavelength of the light .

2. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 1, wherein, Further comprising: According to the third preset information, the third interval between two adjacent third grooves to be machined is determined; According to the third interval, a plurality of parallel third grooves are machined on the surface of the workpiece, and the length direction of the first groove is not parallel to the length direction of the third groove, and the length direction of the second groove is not parallel to the length direction of the third groove.

3. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 2, wherein, The third preset information includes the third incident angle, the third diffraction angle and the wavelength of the third light.

4. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 2, wherein, The depth of the first groove, the depth of the second groove and the depth of the third groove are equal; Or, the depth of at least one of the depth of the first groove, the depth of the second groove and the depth of the third groove is different from the depth of the other two.

5. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 2, wherein, The first preset information, the second preset information and the third preset information are the same; Or, the first preset information, the second preset information and the third preset information are not the same.

6. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 1 or 2, characterized in that, The angle between the length direction of the first groove and the length direction of the second groove is 30°, 45°, 60°, 90° or 120°.

7. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 2, wherein, The angle between the length direction of the second groove and the length direction of the third groove is 120°.

8. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 2, wherein, The first groove is a straight groove, the second groove is a straight groove, and the third groove is a straight groove.

9. The multi-directional micro-groove structure superimposed modulation structural color processing method according to claim 2, wherein, The cross section of the first groove is V-shaped or arc-shaped, the cross section of the second groove is V-shaped or arc-shaped, and the cross section of the third groove is V-shaped or arc-shaped.

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