Optical shaping element

Abstract

The utility model provides an optical shaping element. The optical shaping element comprises a micro curved surface array, the micro curved surface array is composed of M * N micro curved surfaces, M and N are positive integers, two adjacent micro curved surfaces are in smooth transition, and the slopes of the two adjacent micro curved surfaces are continuously changed; and the difference value between the maximum slope value and the minimum slope value of the single micro curved surface and the distance between the point of the maximum slope value and the point of the minimum slope value of the micro curved surface are arranged in a linear proportion. According to the utility model, the problem that the micro curved surface array of the optical shaping element in the prior art is not beneficial to processing and forming is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical equipment technical field, specifically, relate to an optical shaping element. BACKGROUND

[0002] The optical shaping element can realize the shaping of the light beam, for example, diffusion, which usually has a micro-curved surface array, and the micro-curved surface array is usually composed of a plurality of micro-curved surface arrays, thereby realizing the beam shaping of the light beam. The optical shaping element has the characteristics of lightness and thinness, and is widely used in miniaturization and lightness products, such as AR, VR, mobile phones, unmanned aerial vehicles, etc., to match the small divergence angle light source application, such as VCSEL light source.

[0003] The connection position of the connected micro-curved surfaces of the micro-curved surface array of the current optical shaping element is abrupt, the surface type changes discontinuously, and the slope is discontinuous. The discontinuous surface type is difficult to realize in processing, and the sharp corners will become rounded, thereby changing the beam shaping effect of the element, which is not conducive to the product.

[0004] That is, the micro-curved surface array of the optical shaping element in the prior art has the problem of being not conducive to processing and forming. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the utility model is to provide an optical shaping element to solve the problem that the micro-curved surface array of the optical shaping element in the prior art is not conducive to processing and forming.

[0006] In order to achieve the above purpose, the utility model provides an optical shaping element, which comprises a micro-curved surface array, the micro-curved surface array is composed of MxN micro-curved surfaces, M and N are both positive integers, the adjacent two micro-curved surfaces are smoothly transitioned, and the slope of the adjacent two micro-curved surfaces changes continuously; the difference between the maximum slope and the minimum slope of a single micro-curved surface and the distance between the point of the maximum slope and the point of the minimum slope of the micro-curved surface are linearly proportional.

[0007] Further, the plurality of micro-curved surfaces include a plurality of convex and concave curved surfaces, the convex and concave curved surfaces of the micro-curved surface array are alternately arranged along the X-axis direction, and the convex and concave curved surfaces of the micro-curved surface array are alternately arranged along the Y-axis direction.

[0008] Further, the radius of curvature of the central region of the convex curved surface is greater than 0.01mm and less than 1mm; and / or, the radius of curvature of the central region of the concave curved surface is greater than 0.01mm and less than 1mm.

[0009] Further, the length of the micro-curved surface in the X-axis direction, the length of the micro-curved surface in the Y-axis direction and the height of the micro-curved surface all change randomly.

[0010] Further, a half of a maximum length of the micro-curved surface in the X-axis direction Lx_max and a half of a minimum length of the micro-curved surface in the X-axis direction Lx_min satisfy: 0.02 < Lx_min / Lx_max < 0.95; and / or, a half of a maximum length of the micro-curved surface in the Y-axis direction Ly_max and a half of a minimum length of the micro-curved surface in the Y-axis direction Ly_min satisfy: 0.02 < Ly_min / Ly_max < 0.95.

[0011] Further, a maximum sag of the micro-curved surface h_max and a minimum sag of the micro-curved surface h_min satisfy: 2 < h_min / h_max < 0.95.

[0012] Further, a maximum slope of the micro-curved surface k satisfies: tan(-80°) < k < tan(80°).

[0013] Further, a distance dx of vertexes of two adjacent micro-curved surfaces in the micro-curved surface array in the X-axis direction and a sag h of the micro-curved surface satisfy: 0.3 < dx / h < 6; and / or, a distance dy of vertexes of two adjacent micro-curved surfaces in the micro-curved surface array in the Y-axis direction and the sag h of the micro-curved surface satisfy: 0.3 < dy / h < 6.

[0014] Further, slopes of profile lines of each direction of the micro-curved surface array are continuously arranged.

[0015] Further, a slope variation amount (k_max-k_min) / t of a single micro-curved surface satisfies: 100 < (k_max-k_min) / t < 2000; wherein k_max is a maximum value of the slope of the micro-curved surface, k_min is a minimum value of the slope of the micro-curved surface, and t is a vertical distance between a point of the maximum value of the slope of the micro-curved surface and a point of the minimum value of the slope of the micro-curved surface.

[0016] The technical scheme is applied to the utility model, the optical shaping element includes the micro-curved surface array, the micro-curved surface array is composed of M * N micro-curved surfaces, M and N are all positive integers, two adjacent micro-curved surfaces are smoothly connected, and the slope of two adjacent micro-curved surfaces continuously changes; the difference between the maximum value and the minimum value of the slope of a single micro-curved surface and the distance between the point of the maximum value and the point of the minimum value of the slope of the micro-curved surface are linearly proportional.

[0017] The first group to the Mth group of micro-curves are arranged in sequence along the X-axis direction, and the first group to the Nth group of micro-curves are arranged in sequence along the Y-axis direction. The adjacent two micro-curves are smoothly connected, and the slopes of the adjacent two micro-curves are continuously changed. The arrangement is beneficial to ensure that the surface shape at the connecting position between the adjacent two micro-curves is continuously smooth, and the slope is also continuous. This is beneficial to ensure the stability of subsequent processing, to ensure that the connecting position of the adjacent micro-curves does not have shape difference during processing, to ensure the processing precision, and to ensure the shaping effect. By setting the difference between the maximum slope and the minimum slope of a single micro-curve and the distance between the point of the maximum slope and the point of the minimum slope of the micro-curve in a linear proportion, the rationality of the slope and the size of each micro-curve can be ensured to control the uniform light effect of each micro-curve, to ensure the mixing light sufficiency, and to ensure the use reliability of the optical shaping element. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application. The present application is not intended to be unduly limited by such embodiments.

[0019] Figure 1 A structure schematic view of a micro-curve array of example one of the present application is shown;

[0020] Figure 2 A structure schematic view of a micro-curve array of example two of the present application is shown;

[0021] Figure 3 A structure schematic view of a micro-curve array of example three of the present application is shown;

[0022] Figure 4 A slope distribution diagram of a section line in the X-axis direction of the micro-curve array in Figure 3 is shown;

[0023] Figure 5 A structure schematic view of a micro-curve array of example four of the present application is shown;

[0024] Figure 6 A structure schematic view of a micro-curve array of example five of the present application is shown;

[0025] Figure 7 A size marking diagram of a direction of a micro-curve array of one optional embodiment of the present application is shown;

[0026] Figure 8 A size marking diagram of another direction of the micro-curve array in Figure 7 is shown.

[0027] In the above drawings, the following reference signs are used:

[0028] 20, micro-curved array; 30, micro-curved surface. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0031] In the present application, unless otherwise stated, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present application.

[0032] In order to solve the problem of the micro-curved array of the optical shaping element in the prior art which is not conducive to processing and forming, the present application provides an optical shaping element.

[0033] As shown in Figures 1 to 8 The present application provides an optical shaping element, which comprises a micro-curved array 20, the micro-curved array 20 is composed of MxN micro-curved surfaces 30, M and N are both positive integers, the slopes of adjacent two micro-curved surfaces 30 change continuously, and the difference between the maximum slope and the minimum slope of a single micro-curved surface 30 is linearly proportional to the distance between the point of the maximum slope and the point of the minimum slope of the micro-curved surface 30.

[0034] The first group to the Mth group of micro-curved surfaces 30 are arranged in sequence along the X-axis direction, and the first group to the Nth group of micro-curved surfaces 30 are arranged in sequence along the Y-axis direction. The slopes of adjacent two micro-curved surfaces 30 change continuously, which is conducive to ensuring that the surface shape at the connecting position between the adjacent two micro-curved surfaces 30 is continuous and smooth, and the slope is also continuous, which is conducive to ensuring the stability of subsequent processing, ensuring that the connecting position of adjacent micro-curved surfaces 30 does not appear shape difference during processing, and conducive to ensuring the processing precision and ensuring the shaping effect. By setting the difference between the maximum slope and the minimum slope of a single micro-curved surface 30 to be linearly proportional to the distance between the point of the maximum slope and the point of the minimum slope of the micro-curved surface 30, the rationality of the slope and size of each micro-curved surface 30 can be ensured to control the uniform light effect of each micro-curved surface 30, ensure the light mixing sufficiency, and ensure the use reliability of the optical shaping element.

[0035] Specifically, the plurality of micro-curvatures 30 include multiple kinds of convex curvatures and concave curvatures, the convex curvatures and the concave curvatures of the micro-curvature array 20 are alternately arranged along the X-axis direction, and the convex curvatures and the concave curvatures of the micro-curvature array 20 are alternately arranged along the Y-axis direction. That is, the plurality of micro-curvatures 30 arranged along the X-axis direction of the micro-curvature array 20 are alternately arranged as convex curvatures and concave curvatures, so that the surface types of the adjacent two micro-curvatures 30 in the plurality of micro-curvatures 30 arranged along the X-axis direction are different, which are respectively convex curvatures and concave curvatures. Similarly, the plurality of micro-curvatures 30 arranged along the Y-axis direction of the micro-curvature array 20 are alternately arranged as convex curvatures and concave curvatures, so that the surface types of the adjacent two micro-curvatures 30 in the plurality of micro-curvatures 30 arranged along the Y-axis direction are different, which are respectively convex curvatures and concave curvatures. Such arrangement is conducive to forming a wave-shaped micro-curvature array 20, which is conducive to ensuring continuous surface type without breakpoints and sharp corners, and is easy to process and form. The X-axis direction is perpendicular to the Y-axis direction.

[0036] Of course, in the optional embodiments of the present application, the micro-curvatures 30 can be columnar, that is, only the micro-curvatures 30 in the X-axis direction or only the micro-curvatures 30 in the Y-axis direction are alternately arranged as convex curvatures and concave curvatures.

[0037] Specifically, the radius of curvature of the central region of the convex curvature is greater than 0.01 mm and less than 1 mm; the radius of curvature of the central region of the concave curvature is greater than 0.01 mm and less than 1 mm. Too large radius of curvature makes the center of the light spot too strong, which is easy to form bright spots, and too small radius of curvature makes the surface type too sharp, which is not easy to process and is easy to damage. By reasonably planning the central radius of curvature of the micro-curvature 30 in this range, the surface type reliability of each micro-curvature 30 is ensured, and the light mixing effect is ensured.

[0038] In the present application, the length of the micro-curvature 30 in the X-axis direction, the length of the micro-curvature 30 in the Y-axis direction, and the height of the micro-curvature 30 all change randomly. That is, the size and height of the plurality of micro-curvatures 30 in the micro-curvature array 20 are random. The lengths of the plurality of micro-curvatures 30 in the X-axis direction are partly equal and partly unequal without rules. The lengths of the plurality of micro-curvatures 30 in the Y-axis direction are partly equal and partly unequal without rules. The heights of the plurality of micro-curvatures 30 include multiple kinds of equal and unequal. Such randomness of size and height is conducive to increasing the light mixing sufficiency and ensuring the uniformity of the brightness of the outgoing light spot.

[0039] As Figure 7 and Figure 8As shown, the half of the maximum length of the micro-curved surface 30 in the X-axis direction Lx_max and the half of the minimum length of the micro-curved surface 30 in the X-axis direction Lx_min satisfy: 0.02 < Lx_min / Lx_max < 0.95; the half of the maximum length of the micro-curved surface 30 in the Y-axis direction Ly_max and the half of the minimum length of the micro-curved surface 30 in the Y-axis direction Ly_min satisfy: 0.02 < Ly_min / Ly_max < 0.95. The maximum height of the micro-curved surface 30 h_max and the minimum height of the micro-curved surface 30 h_min satisfy: 2 < h_min / h_max < 0.95. By reasonably planning the size and height of each micro-curved surface 30, when the size and height of each micro-curved surface 30 are different, the size and intensity of the light spot emitted by each micro-curved surface 30 are different, which is beneficial to mixing light. Figure 7 Lx1 and Lx2 in the formula are respectively the half of the maximum length of two different micro-curved surfaces 30 in the X-axis direction, and Ly1 and Ly2 are respectively the half of the maximum length of two different micro-curved surfaces 30 in the Y-axis direction.

[0040] It should be noted that Lx_max is the half of the maximum length of the micro-curved surface 30 with the maximum length in the X-axis direction among the plurality of micro-curved surfaces 30, Lx_min is the half of the minimum length of the micro-curved surface 30 with the minimum length in the X-axis direction among the plurality of micro-curved surfaces 30, and Ly_max and Ly_min are the same. h_max is the height of the micro-curved surface 30 with the maximum height among the plurality of micro-curved surfaces 30, and h_min is the height of the micro-curved surface 30 with the minimum height among the plurality of micro-curved surfaces 30. When the micro-curved surface 30 is columnar, its Lx or Ly is not limited, and is related to the actual required size of the micro-curved surface array 20, and can be set according to actual conditions.

[0041] Specifically, the maximum slope k of the micro-curved surface 30 satisfies: tan(-80°) < k < tan(80°). By reasonably planning the maximum slope k in the range, it is beneficial to ensure that the slope of the micro-curved surface 30 satisfies the smooth surface type distribution, and at the same time, the light mixing effect is satisfied.

[0042] In the present application, the vertexes of the plurality of microcurved surfaces 30 of the microcurved surface array 20 include a plurality of regular arrangements and irregular arrangements, and the distance dx between the vertexes of two adjacent microcurved surfaces 30 in the microcurved surface array 20 in the X-axis direction and the height h of the microcurved surface 30 satisfy: 0.3 < dx / h < 6; the distance dy between the vertexes of two adjacent microcurved surfaces 30 in the microcurved surface array 20 in the Y-axis direction and the height h of the microcurved surface 30 satisfy: 0.3 < dy / h < 6. When the microcurved surface 30 is columnar, it is not limited by 0.3 < dx / h < 6 or 0.3 < dy / h < 6. If dx / h or dy / h is too large, the beam expanding effect of the microcurved surface array 20 is not obvious, and bright spots are easily formed in the center of the light spot. If dx / h or dy / h is too small, the slope of the microcurved surface 30 is too large, the mold is not easy to process, and the structure is easy to deform when demolding. By restricting such a range, the distribution density of the microcurved surface 30 can be controlled, and the distribution density and the height are also restricted, which is beneficial to ensure the stability of the surface type, and further ensure the continuous feasibility of the surface type, and ensure the reliability of the mixed light.

[0043] Specifically, the slope of the profile line of each direction of the microcurved surface array 20 is continuously arranged. That is to say, the line formed by the cross section perpendicular to the direction of the microcurved surface array 20 is a continuous curve, and the slope is also continuously distributed. The smaller the arrangement distance of the adjacent microcurved surfaces 30, the faster the slope changes. The slope change amount (k_max-k_min) / t of a single microcurved surface 30 satisfies: 100 < (k_max-k_min) / t < 2000; wherein k_max is the maximum value of the slope of the microcurved surface 30, k_min is the minimum value of the slope of the microcurved surface 30, and t is the vertical distance between the point of the maximum value of the slope and the point of the minimum value of the slope of the microcurved surface 30. Such arrangement is beneficial to ensure the slope continuity of a single microcurved surface 30 and the curvature continuity, which is beneficial to improve the smoothness of the microcurved surface 30 to become a G1 or G2 surface. (k_max-k_min) / t is related to the size of the microcurved surface 30. The larger (k_max-k_min) / t is, the smaller the microcurved surface 30 is. The microcurved surface 30 is too small and is not conducive to processing.

[0044] It should be noted that M = L / Lx0 and N = W / Ly0. Wherein, L is the length of the microcurved surface array 20 in the X-axis direction, W is the length of the microcurved surface array 20 in the Y-axis direction, Lx0 is the average of half of the length of a single microcurved surface 30 of the microcurved surface array 20 in the X-axis direction, and Ly0 is the average of half of the length of a single microcurved surface 30 of the microcurved surface array 20 in the Y-axis direction. M and N can be odd or even numbers. In order to arrange a plurality of products continuously and continuously, M and N are preferably even numbers. According to the size of the target microcurved surface array 20, the grouping number M and N are determined, so that the number of microcurved surfaces 30 can be adjusted conveniently and freely.

[0045] The present application will be described below in conjunction with specific examples and the accompanying drawings.

[0046] In an optional embodiment of the present application, the length L of the micro-curved surface array 20 in the X-axis direction is 4 mm, the length W of the micro-curved surface array 20 in the Y-axis direction is 3.6 mm, k_min=0, and k_max=tan(54.23°). The corresponding parameters of the three examples are shown in Table 1 below:

[0047] Table 1

[0048]

[0049] Figure 1 A structural schematic diagram of the micro-curved surface array 20 of Example One is shown. Figure 2 A schematic diagram of the micro-curved surface array 20 of Example Two is shown. Figure 3 A structural schematic diagram of the micro-curved surface array 20 of Example Three is shown. Since the number of pixels in the micro-curved surface array 20 is too large, in order to avoid too many horizontal and vertical lines being too dense, rendering a mass of black and failing to display the curved surface, a view that can clearly display is reasonably used for display.

[0050] Figure 4 A slope distribution schematic diagram of the section line in the X-axis direction of the micro-curved surface array 20 of Example Three is shown. It can be seen from the comparison that the slope of the micro-curved surface array 20 of Example Three is continuous and has no endpoints, and the slope changes from small to large and from large to small from left to right in turn, without steep rising and steep falling, which is conducive to ensuring that the surface of the micro-curved surface array 20 is smooth and continuous.

[0051] The present application also provides Example Four and Example Five.

[0052] In Example Four, as shown in Figure 5 M=8 and N=8, the micro-curved surface array 20 composed of MxN micro-curved surfaces 30 is taken as a basic unit, and then an integrated micro-curved surface array 20 formed by 2x2 basic units is formed according to the basic unit. Figure 5 (a) and (b) respectively show a structural schematic diagram and a top view of a basic unit. Figure 5 (c) and (d) respectively show a structural schematic diagram and a top view of the integrated micro-curved surface array 20. It can be seen from the diagram that the surface continuity of the integrated micro-curved surface array 20 formed in this way is better.

[0053] In Example Four, as shown in Figure 6 M=7 and N=7, the micro-curved surface array 20 composed of MxN micro-curved surfaces 30 is taken as a basic unit, and then an integrated micro-curved surface array 20 formed by 2x2 basic units is formed according to the basic unit. Figure 6(a) and (b) respectively show a structural schematic diagram and a top view of one basic unit. Figure 6 (c) and (d) respectively show a structural schematic diagram and a top view of the integrated micro-curved array 20. As can be seen from the figure, the surface continuity of the integrated micro-curved array 20 formed in this way is better. However, in this example, the splicing position of adjacent basic units is prone to sharp corners and too small round corners, which is not conducive to sample making. This is a defect caused by the fact that M and N are both odd numbers, so M and N are preferably even numbers.

[0054] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be further understood that the use of the term "comprise" and / or "include" in this specification indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0057] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An optical shaping element, characterized in that, It includes a micro - surface array (20), and the micro - surface array (20) is composed of M×N micro - surfaces (30), where both M and N are positive integers. The adjacent two micro - surfaces (30) are smoothly transitioned, and the slopes of the adjacent two micro - surfaces (30) change continuously; the difference between the maximum slope value and the minimum slope value of a single micro - surface (30) is linearly proportional to the distance between the point with the maximum slope value and the point with the minimum slope value of this micro - surface (30).

2. The optical shaping element according to claim 1, characterized in that, The multiple micro - surfaces (30) include various types such as convex surfaces and concave surfaces. The convex surfaces and the concave surfaces of the micro - surface array (20) are alternately arranged along the X - axis direction, and the convex surfaces and the concave surfaces of the micro - surface array (20) are alternately arranged along the Y - axis direction.

3. The optical shaping element according to claim 2, wherein the radius of curvature of the central region of the convex surface is greater than 0.01 mm and less than 1 mm; and / or the radius of curvature of the central region of the concave surface is greater than 0.01 mm and less than 1 mm.

4. The optical shaping element according to claim 1, characterized in that, The length of the micro - surface (30) in the X - axis direction, the length of the micro - surface (30) in the Y - axis direction, and the sag height of the micro - surface (30) all change randomly.

5. The optical shaping element according to claim 1, wherein the relationship between half of the maximum length Lx_max of the micro - surface (30) in the X - axis direction and half of the minimum length Lx_min of the micro - surface (30) in the X - axis direction satisfies: 0.02 < Lx_min / Lx_max < 0.95; and / or the relationship between half of the maximum length Ly_max of the micro - surface (30) in the Y - axis direction and half of the minimum length Ly_min of the micro - surface (30) in the Y - axis direction satisfies: 0.02 < Ly_min / Ly_max < 0.

95.

6. The optical shaping element according to claim 1, characterized in that, The relationship between the maximum sag height h_max and the minimum sag height h_min of the micro - surface (30) satisfies: 2 < h_min / h_max < 0.

95.

7. The optical shaping element according to claim 1, characterized in that, The maximum slope k of the micro - surface (30) satisfies: tan(-80°) < k < tan(80°).

8. The optical shaping element according to claim 1, wherein the relationship between the distance dx in the X - axis direction between the vertices of the adjacent two micro - surfaces (30) in the micro - surface array (20) and the sag height h of the micro - surface (30) satisfies: 0.3 < dx / h < 6; and / or the relationship between the distance dy in the Y - axis direction between the vertices of the adjacent two micro - surfaces (30) in the micro - surface array (20) and the sag height h of the micro - surface (30) satisfies: 0.3 < dy / h < 6.

9. The optical shaping element according to claim 1, characterized in that, The slopes of the profile lines in all directions of the micro - surface array (20) are continuously set.

10. The optical shaping element according to any one of claims 1 to 9, wherein the slope change amount (k_max - k_min) / t of a single micro - surface (30) satisfies: 100 < (k_max - k_min) / t < 2000; Wherein, k_max is the maximum slope of the micro-surface (30), k_min is the minimum slope of the micro-surface (30), and t is the perpendicular distance between the point of maximum slope and the point of minimum slope of the micro-surface (30).

Images