Segmented focusing diverging lens

Abstract

The segmented focusing diverging lens comprises a light inlet surface and a light outlet surface, the light outlet surface is an arc-shaped curved surface protruding forwards, a lens body with thickness is arranged between the light inlet surface and the light outlet surface, the light inlet surface is divided into two sections of structures, the two sections of structures are an upper light inlet surface and a lower light inlet surface which are connected, the upper light inlet surface is a flat surface, and the lower light inlet surface is a flat surface. The lower light inlet face is an inwards-concave curved face which is concave inwards, and the depth of the middle of the inwards-concave curved face is the largest. Compared with a lens which is larger in overall size and thicker in edge part in the prior art, in order to achieve the same horizontal divergence angle, only the lower light inlet surface needs to be arranged to be of an inwards-concave curved surface structure, meanwhile, the edge part of the lens body can be made to be thinner, so that the overall size of the lens is reduced, the glue inlet amount needed during injection molding is saved, and the production cost is reduced. And after the glue amount is reduced, the injection molding precision during injection molding is more convenient to control, so that the production efficiency and the yield of lens injection molding are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of lenses, in particular to a segmented focusing divergent lens. Background Art

[0002] In the existing technology in the field of lighting, lenses are usually used to achieve the light output function, and the processing process of the light beam is mainly concentrated on the lens part. When the light beam reaches the lens and is refracted by the lens, it is directly emitted. Therefore, the role of the lens in the lighting lamp is to converge or diverge the light.

[0003] The production process of lens injection molding is a precise and multi-step process, in which the raw materials are melted by heating, injected into the mold, and then injected into the mold by a high-pressure injection molding machine. During the injection molding process, it is necessary to control the temperature and pressure to ensure the molding quality of the lens. At the same time, the optical material must have good high temperature resistance and fluidity to ensure the quality of injection molding.

[0004] According to the imaging principle of the lens, under the premise that the lens and the light source are at the same focal length, in order to ensure that the lens has a certain focusing and diverging effect, the lens is usually made into a convex lens, with the light input surface 1 being a flat surface and the light output surface 2 being a convex curved surface. Figure 1 and Figure 2 The first lens of the prior art is shown. The lens has a convex surface curved in the horizontal direction and a convex surface curved in the vertical direction, so that the lens has not only a focusing effect but also a diverging effect. The focusing effect is to increase the lighting brightness, and the diverging effect is to expand the imaging area. Figure 1 The volume of the lens shown is 56739.93 cubic millimeters, the thickness of the edge portions 3 of the left and right sides of the lens body is 13.56 millimeters, the thickness of the lens is 24 millimeters, and the diameter of the lens body is 68 millimeters. The specific imaging effect of the lens is as follows Figure 3 and Figure 4 As shown, when the light source is set to 50W, Figure 3 and Figure 4 The horizontal divergence value of the lens imaging is shown to be plus or minus 22. The horizontal divergence value of the lens is small and cannot meet the lighting requirements.

[0005] In order to increase the divergence value in the horizontal direction, according to the imaging principle of the lens, the prior art usually needs to increase the thickness of the edge portions 3 of the left and right sides of the lens body to ensure that the divergence value in the horizontal direction is large enough to meet the lighting requirements. Figure 5 and Figure 6The second lens of the prior art is shown. The light-incoming surface 1 of the lens is also a flat surface, and the light-outgoing surface 2 is also a convex curved surface. The volume of the lens shown is 74117.53 cubic millimeters, the thickness of the edge portions 3 of the left and right sides of the lens body is 22.41 millimeters, the thickness of the lens is 25.5 millimeters, and the diameter of the lens body is 68 millimeters. The specific imaging effect of the lens is as follows Figure 7 and Figure 8 As shown, when the light source is set to 50W, Figure 7 and Figure 8 As shown in the figure, the horizontal divergence of the lens imaging is plus or minus 39.5. It can be seen that when the thickness and overall volume of the lens are increased, the horizontal divergence can be significantly increased, such as Figure 5 and Figure 6 As shown in the figure, when the thickness of the lens increases, the following defects will occur: when the thickness of the lens increases, the overall volume also increases, and it is difficult to control the injection temperature, injection pressure, injection amount and injection precision during the production injection molding process. At the same time, the injection molding time will also be increased, affecting the production efficiency and yield rate of lens injection molding. Figure 5 Taking the lens as an example, under the premise of setting the mold to have four out of one, it takes 800-1000S to complete one injection molding. Utility Model Content

[0006] The purpose of the utility model is to solve the above defects and provide a segmented focusing and diverging lens, which not only has focusing and diverging effects, but is also more convenient for injection molding, thereby significantly improving production efficiency and solving the technical problem in the prior art that the overall volume of the lens is large, which affects injection molding and thus affects production efficiency.

[0007] The purpose of the utility model is achieved by the following methods:

[0008] A segmented focusing divergent lens comprises a light-incoming surface and a light-outgoing surface, wherein the light-outgoing surface is an arc-shaped curved surface convex forward, a lens body having thickness is provided between the light-incoming surface and the light-outgoing surface, and the side surface of the lens body is an edge portion, wherein the light-incoming surface is divided into two sections, and the two sections are respectively an upper light-incoming surface and a lower light-incoming surface connected to each other, wherein the upper light-incoming surface is a flat surface, and the lower light-incoming surface is an inwardly concave curved surface, wherein the depth of the middle portion of the inwardly concave curved surface is the largest, and the depth of the middle portion of the inwardly concave curved surface gradually becomes shallower along the left and right ends.

[0009] Furthermore, the left and right ends of the concave curved surface are symmetrically arranged along the middle of the concave curved surface.

[0010] Furthermore, a horizontal section is provided on one end surface where the lower light-incoming surface is connected to the upper light-incoming surface. The horizontal section is provided to make the light segmentation more obvious, isolate the extra stray light, and ensure that the central overlapping area has a higher brightness.

[0011] Furthermore, the outer periphery of one end of the edge portion close to the light-entering surface extends outward to form a limiting ring for installation positioning. The limiting ring is used to limit the lens, ensure the lens installation precision is high, ensure that the focal length of the lens and the light source is stable after installation, and is stable and not easy to loosen after installation.

[0012] Furthermore, the upper light-incoming surface and the lower light-incoming surface are equally divided into the light-incoming surface above and below.

[0013] The beneficial effect produced by the utility model is that the light-inlet surface is divided into two sections, and the lower light-inlet surface is set to an inwardly concave curved surface structure. Under the premise of ensuring that the upper light-inlet surface and the lower light-inlet surface are at the same focal length as the light source, when the light source simultaneously irradiates and enters the lens body along the upper light-inlet surface, the light entering the lens body along the upper light-inlet surface is refracted to form a secondary light spot, and the light entering the lens body along the lower light-inlet surface is refracted to form a main light spot. Since the concave curved surface structure has the effect of diverging light in the horizontal direction, the horizontal divergence angle of the main light spot is greater than the horizontal divergence angle of the secondary light spot. Based on the lens imaging principle, the main light spot after imaging is located at the secondary light spot. At the upper end of the light spot, the horizontal divergence angle of the main light spot is larger, and the auxiliary light spot and the main light spot are partially overlapped, the imaging effect brightness of the overlapping area of ​​the light spots is higher, and the overlapping area of ​​the light spots is clearly segmented from other areas; in addition, compared with the lens with a larger overall volume and thicker edge in the prior art, in order to achieve the same horizontal divergence angle, it is only necessary to set the lower light-incoming surface as an inwardly concave curved surface structure, and at the same time, the edge of the lens body can be made thinner to reduce the overall volume of the lens and save the amount of glue required for injection molding. When the amount of glue is reduced, it is easier to control the injection molding accuracy during injection molding, thereby significantly improving the production efficiency and yield rate of lens injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the three-dimensional structure of the main viewing angle of the first existing lens of the background technology;

[0015] Figure 2 A schematic diagram of the three-dimensional structure of the rear view angle of the first existing lens in the background technology;

[0016] Figure 3 The light spot simulation diagram of the main viewing angle of the first existing lens in the background technology;

[0017] Figure 4 The background technology is the spot imaging diagram of the first existing lens at the rear-view angle;

[0018] Figure 5 A schematic diagram of the three-dimensional structure of the main viewing angle of the second lens of the prior art;

[0019] Figure 6 A schematic diagram of the three-dimensional structure of the rear view angle of the second existing lens in the background technology;

[0020] Figure 7 The light spot simulation diagram of the main viewing angle of the second lens of the background technology is shown;

[0021] Figure 8 This is the light spot imaging diagram of the rear-view angle of the existing second lens of the background technology;

[0022] Fig. 9 It is a schematic diagram of the three-dimensional structure of the main viewing angle of the segmented focusing divergent lens of the utility model;

[0023] Fig.10 It is a three-dimensional structural schematic diagram of the rear view angle of the segmented focusing divergent lens of the utility model;

[0024] Fig.11 This is a bottom view of the segmented focusing divergent lens of the utility model;

[0025] Fig.12 It is a side view of the segmented focusing divergent lens of the utility model;

[0026] Fig.13 This is a light spot simulation diagram of the segmented focusing divergent lens of the utility model;

[0027] Fig.14 This is the light spot imaging diagram of the segmented focusing divergent lens of the utility model;

[0028] Figure 1 , Figure 2 , Figure 5 , Figure 6 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 In the figure, 1-light-incoming surface, 101-upper light-incoming surface, 102-lower light-incoming surface, 2-light-exiting surface, 3-edge portion, 4-horizontal section, 5-limiting ring. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] In this embodiment, refer to Figure 9-14 The segmented focusing divergent lens specifically implemented includes a light-incoming surface and a light-outgoing surface 2, the light-outgoing surface 2 is an arc-shaped surface convex forward, and the arc-shaped surface includes a convex surface curved in the horizontal direction and a convex surface curved in the vertical direction.

[0031] Between the light-inlet surface and the light-outlet surface 2 is a lens body with thickness, and the side of the lens body is an edge portion 3. The outer periphery of the edge portion 3 at one end close to the light-inlet surface extends outward to form a limit ring 5 for installation and positioning. The limit ring 5 is used to limit the lens to ensure high lens installation accuracy, to ensure that the focal length of the lens and the light source remains stable after installation, and that it is stable and not easy to loosen after installation. The light-inlet surface is divided into two sections, which are an upper light-inlet surface 101 and a lower light-inlet surface 102 connected to each other. The upper light-inlet surface 101 and the lower light-inlet surface 102 are equally divided into the light-inlet surface above and below. Fig.10 As shown, the upper light-incoming surface 101 is a flat surface, the lower light-incoming surface 102 is an inwardly concave curved surface, and a horizontal section 4 is provided on one end surface of the lower light-incoming surface 102 connected to the upper light-incoming surface 101. The horizontal section 4 is provided to make the light segmentation more obvious, isolate the excess stray light, and ensure that the brightness of the central overlapping area is higher. The middle part of the concave curved surface has the largest depth, and the middle part of the concave curved surface gradually becomes shallower along the left and right ends, and the left and right ends of the concave curved surface are symmetrically arranged along the middle part of the concave curved surface.

[0032] The volume of the segmented focusing divergent lens of this embodiment is 46995.76 cubic millimeters, the thickness of the left and right side edge portions 3 of the lens body is 13.56 millimeters, the lens thickness is 24 millimeters, and the diameter of the lens body is 68 millimeters. For the convenience of comparison, the thickness of the left and right side edge portions 3 of the segmented focusing divergent lens of this embodiment, the lens thickness and the diameter of the lens body are consistent with those of the first lens of the background technology. In addition, the middle depth of the concave surface of this embodiment is set to 8.74 millimeters. The specific imaging effect of this lens is as follows: Fig.13 and Fig.14 When the light source is set to 50W, Fig.13 and Fig.14 The horizontal divergence value of the imaging of the segmented focusing divergent lens shown is plus or minus 39.5. Compared with the horizontal divergence value of the first lens of the background technology, when other parameters are the same, the segmented focusing divergent lens of this embodiment has a smaller volume than the first lens of the background technology, requires less glue during injection molding, has higher injection molding efficiency, and its horizontal divergence angle is significantly larger than the first lens of the background technology.

[0033] The horizontal divergence value of the segmented focusing divergent lens of the present embodiment is consistent with that of the second lens of the background technology, but the volume, thickness of the edge portion 3 and lens thickness of the segmented focusing divergent lens of the present embodiment are significantly smaller than those of the second lens, especially there is a large difference in the overall values ​​of the lens volume and the thickness of the edge portion 3 of the lens. Therefore, in order to achieve the same horizontal divergence angle, the segmented focusing divergent lens of the present embodiment only needs to set the lower light input surface 102 to an inwardly concave curved surface structure, and at the same time, the edge portion 3 of the lens body can be made thinner to reduce the overall volume of the lens and save the amount of glue required for injection molding. When the amount of glue is reduced, it is easier to control the injection molding accuracy during injection molding, thereby significantly improving the production efficiency and yield rate of lens injection molding. When the segmented focusing divergent lens of the present embodiment is injection molded, under the premise of setting the mold to one out of four, the injection molding time only needs 520-630S, which saves 280-370S compared to the production time of the second lens of the background technology, and the efficiency is significantly improved. In addition, Fig.13 and Fig.14 As shown, the auxiliary light spot and the main light spot are partially overlapped. After isolating the excess stray light, the light is more concentrated, the imaging effect in the overlapping area of ​​the light spots is brighter, and the overlapping area of ​​the light spots is clearly segmented from other areas.

[0034] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as the protection scope of the present invention.

Claims

1. A segmented focusing divergent lens, comprising a light-incoming surface and a light-outgoing surface, wherein the light-outgoing surface is an arc-shaped curved surface convex forward, a lens body having thickness is provided between the light-incoming surface and the light-outgoing surface, and the side surface of the lens body is an edge portion, wherein the characteristics are: The light-incoming surface is divided into two sections, which are an upper light-incoming surface and a lower light-incoming surface connected to each other. The upper light-incoming surface is a flat surface, and the lower light-incoming surface is an inwardly concave curved surface. The middle depth of the concave curved surface is the largest, and the middle depth of the concave curved surface gradually becomes shallower along the left and right ends.

2. The segmented focusing diverging lens according to claim 1, characterized in that: The left and right ends of the concave curved surface are symmetrically arranged along the middle of the concave curved surface.

3. The segmented focusing diverging lens according to claim 1, characterized in that: An end surface of the lower light-incoming surface connected to the upper light-incoming surface is provided with a horizontal cross section.

4. The segmented focusing diverging lens according to any one of claims 1 to 3, characterized in that: The periphery of an end of the edge portion close to the light-incoming surface extends outward to form a limiting ring for installation and positioning.

5. The segmented focusing diverging lens according to any one of claims 1 to 3, characterized in that: The upper light-incoming surface and the lower light-incoming surface are respectively equally divided into the light-incoming surface from top to bottom.

Images