Same-focal-length sectional type focusing lens

Abstract

The utility model relates to a same focal length sectional type focusing lens in the lens field, which comprises a light inlet surface and a light outlet surface, the light outlet surface is divided into a sectional structure, a second lens body with thickness is arranged between the light inlet surface and a second light outlet surface, and a first lens body with thickness is arranged between the light inlet surface and a first light outlet surface. The edge thickness of the first lens body is larger than that of the second lens body, and the area of the first light-emitting face is larger than that of the second light-emitting face. The thickness of the second lens body is smaller, the second lens body has a better focusing effect compared with the first lens body, the second lens body mainly plays a role in focusing light rays and can effectively focus the light rays irradiated into the second lens body, the focused auxiliary light spots and the main light spots are partially overlapped, and the light intensity of the overlapped area of the focused auxiliary light spots and the main light spots is higher. The light spots in the area and the light spots in other areas are more obviously segmented, and the light emitting surface is designed into a two-segment structure, so that not only can the divergent imaging effect be achieved, but also the overall luminous intensity can be improved.

Description

Technical Field

[0001] The utility model relates to the field of lenses, in particular to a same-focal-length segmented focusing 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, 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, such as Figure 1 and Figure 2 As shown, the light-incoming surface 1 is a flat surface, and the light-outgoing surface 2 is a convex surface. The convex lens has a convex surface that is curved in the horizontal direction and a convex surface that is curved in the vertical direction, so that the convex 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. The specific imaging effect of the convex lens is as follows Figure 3 and Figure 4 As shown, when the light source is set to 25W, Figure 3 and Figure 4 The horizontal divergence value of the convex lens imaging is shown to be plus or minus 23, and the maximum luminous intensity is 32600cd. Since the light-emitting surface of the convex lens is a smooth overall curved surface, the imaging spot will be a relatively smooth whole, the spot segmentation is not obvious enough, and the maximum luminous intensity is not high, which cannot meet the lighting requirements. In addition, Figure 1 and Figure 2 The volume of the convex lens shown is 9529.65 cubic millimeters. When the thickness of the convex lens increases, the overall volume also increases. 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, it will also increase the injection molding time, affecting the production efficiency and yield rate of lens injection molding. Figure 1 Take the convex lens as an example. Under the premise of setting the mold to have four molds, it takes 350-450 seconds to complete one injection molding. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide a segmented focusing lens with the same focal length, which has a focusing effect, makes the luminous intensity higher and the light spot segmentation more obvious, and solves the technical problems of insufficient luminous intensity and unclear light spot segmentation in the prior art.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] A segmented focusing lens with the same focal length comprises a light-incoming surface and a light-outgoing surface, wherein the light-incoming surface is a flat surface, and the light-outgoing surface is an arc-shaped curved surface convex forward, wherein the light-outgoing surface is divided into a segmented structure, wherein the segmented structure comprises a second light-outgoing surface and a first light-outgoing surface connected to each other, wherein the first light-outgoing surface is located below the second light-outgoing surface, a second lens body having a thickness is disposed between the light-incoming surface and the second light-outgoing surface, a first lens body having a thickness is disposed between the light-incoming surface and the first light-outgoing surface, an edge thickness of the first lens body is greater than an edge thickness of the second lens body, and an area of ​​the first light-outgoing surface is greater than an area of ​​the second light-outgoing surface.

[0008] Furthermore, a horizontal section is provided on one end face where the second lens body is connected to the first lens body, and the thickness of the horizontal section is the difference between the edge thicknesses of the first lens body and the second lens body. The horizontal section is provided to make the light segmentation more obvious, isolate excess stray light, and ensure that the brightness of the central overlapping area is higher.

[0009] Furthermore, the light inlet surface is raised in a direction away from the light outlet surface to form a limiting platform for limiting the position of the lens, ensuring that the lens is installed with high precision, that the focal length of the lens and the light source is stable after installation, and that the lens is stable and not easy to loosen after installation.

[0010] Furthermore, the side surfaces of the second lens body and the first lens body are edge portions, and the periphery of the edge portions close to the light-entering surface extends outward to form four positioning angles for installation, and positioning holes are reserved on the positioning angles. When installing the lens, four matching screws inserted into the positioning holes are used to press and position it.

[0011] Furthermore, the segmented structure also includes a third light-emitting surface connected to the second light-emitting surface, the third light-emitting surface is located above the second light-emitting surface, and a third lens body with thickness is provided between the light-incoming surface and the third light-emitting surface, the edge thickness of the third lens body is smaller than the edge thickness of the second lens body, and the area of ​​the third light-emitting surface is smaller than the area of ​​the second light-emitting surface.

[0012] Furthermore, the segmented structure also includes a fourth light-emitting surface connected to the third light-emitting surface, the fourth light-emitting surface is located above the third light-emitting surface, and a fourth lens body with thickness is provided between the light-incoming surface and the fourth light-emitting surface, the edge thickness of the fourth lens body is smaller than the edge thickness of the third lens body, and the area of ​​the fourth light-emitting surface is smaller than the area of ​​the third light-emitting surface.

[0013] The third lens body and the fourth lens body are added, which have the same focusing effect as the second lens body, but the thickness of the third lens body and the fourth lens body is smaller than that of the second lens body, so their focusing effect is better and the overall luminous intensity is higher. Therefore, setting up a connected multi-segment structure can sequentially enhance the focusing effect, thereby further improving the luminous intensity of the lens.

[0014] The beneficial effect produced by the utility model is as follows: the light-emitting surface is divided into a segmented structure, including a second lens body and a first lens body of the segmented structure; under the premise of ensuring that the light-entering surface and the light source are at the same focal length, when the light source simultaneously irradiates the second lens body and the first lens body along the light-entering surface, the light entering the second lens body forms a secondary light spot after being refracted, and the light entering the first lens body forms a main light spot after being refracted; based on the lens imaging principle, the main light spot after imaging is located at the upper end of the secondary light spot; since the edge thickness of the first lens body is greater than the edge thickness of the second lens body, and the area of ​​the first light-emitting surface is greater than the area of ​​the second light-emitting surface, the horizontal divergence angle of the main light spot is greater than the horizontal divergence angle of the secondary light spot; the first lens body mainly plays a role in light divergence, and the main light spot The horizontal divergence angle is larger, the thickness of the second lens body is smaller, and it has a better focusing effect than the first lens body. The second lens body mainly focuses the light, and can effectively focus the light irradiated into the second lens body. The auxiliary light spot and the main light spot after focusing are partially overlapped, and the luminous intensity of the overlapping area of ​​the auxiliary light spot and the main light spot after focusing is higher. The light spot in this area is more obviously segmented from the light spots in other areas. The light output surface is designed as a two-stage structure, which can not only achieve the divergent imaging effect, but also improve the overall luminous intensity. In addition, the edge thickness of the second lens body is smaller, which can 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

[0015] Figure 1 A schematic diagram of the three-dimensional structure of the main viewing angle of an existing convex lens in the background technology;

[0016] Figure 2 A schematic diagram of the three-dimensional structure of the rear view angle of an existing convex lens in the background technology;

[0017] Figure 3 The light spot simulation diagram of the main viewing angle of the existing convex lens in the background technology;

[0018] Figure 4 This is the light spot imaging diagram of the existing convex lens rear view angle in the background technology;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the main viewing angle of the first embodiment of the utility model of the segmented focusing lens with the same focal length;

[0020] Figure 6It is a schematic diagram of the three-dimensional structure of the utility model of the same focal length segmented focusing lens at a rear-view angle;

[0021] Figure 7 It is a side view of the first embodiment of the utility model of the segmented focusing lens with the same focal length;

[0022] Figure 8 This is a front view of the first embodiment of the utility model of the segmented focusing lens with the same focal length;

[0023] Fig. 9 This is a light spot simulation diagram of the first embodiment of the utility model of the segmented focusing lens with the same focal length;

[0024] Fig.10 This is a light spot imaging diagram of the first embodiment of the utility model of the segmented focusing lens with the same focal length;

[0025] Fig.11 It is a schematic diagram of the three-dimensional structure of the main viewing angle of the second embodiment of the utility model of the segmented focusing lens with the same focal length;

[0026] Fig.12 This is a front view of the second embodiment of the utility model of the segmented focusing lens with the same focal length;

[0027] Fig.13 It is a side view of the third embodiment of the utility model of the segmented focusing lens with the same focal length;

[0028] Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.11 , Fig.12 and Fig.13 In the figure, 1-light-incoming surface, 2-light-exiting surface, 201-second lens body, 202-first lens body, 3-horizontal section, 4-positioning angle, 5-positioning hole, 6-limiting platform. DETAILED DESCRIPTION

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

[0030] Embodiment 1

[0031] In this embodiment, refer to Figure 5-Figure 10 The same focal length segmented focusing lens specifically implemented includes a light-incoming surface 1 and a light-outgoing surface. The light-incoming surface 1 is a flat surface, and the light-outgoing surface is an arc-shaped curved surface convex forward. The light-incoming surface 1 convexly forms a limiting platform 6 for limiting the position in a direction away from the light-outgoing surface. The limiting platform 6 is used to limit the position of 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.

[0032] The light-emitting surface is divided into a segmented structure, which includes a second light-emitting surface and a first light-emitting surface connected to each other. The first light-emitting surface is located below the second light-emitting surface. A second lens body 201 having a thickness is provided between the light-inlet surface 1 and the second light-emitting surface. A first lens body 202 having a thickness is provided between the light-inlet surface 1 and the first light-emitting surface. The edge thickness of the first lens body 202 is greater than the edge thickness of the second lens body 201. The area of ​​the first light-emitting surface is greater than the area of ​​the second light-emitting surface. A horizontal section 3 is provided on one end surface connected to the second lens body 201 and the first lens body 202. The thickness of the horizontal section 3 is the difference between the edge thickness of the first lens body 202 and the second lens body 201. The horizontal section 3 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.

[0033] In addition, the side surfaces of the second lens body 201 and the first lens body 202 are edge portions, and the periphery of the edge portions close to the light-entering surface 1 extends outward to form four positioning angles 4 for installation, and positioning holes 5 are reserved on the positioning angles 4. When installing the lens, four matching screws that penetrate into the positioning holes 5 are used to tighten and position it.

[0034] Based on the lens imaging principle, the main light spot after imaging is located at the upper end of the auxiliary light spot. Since the edge thickness of the first lens body 202 is greater than the edge thickness of the second lens body 201, and the area of ​​the first light emitting surface is greater than the area of ​​the second light emitting surface, the horizontal divergence angle of the main light spot is greater than the horizontal divergence angle of the auxiliary light spot. The first lens body 202 mainly plays a role in light divergence, and the horizontal divergence angle of the main light spot is larger. The second lens body 201 is thinner in thickness and has a better focusing effect than the first lens body 202. The second lens body 201 mainly plays a role in light focusing, and can effectively focus the light irradiated into the second lens body 201. The auxiliary light spot and the main light spot after focusing are partially overlapped, and the luminous intensity of the overlapping area of ​​the auxiliary light spot and the main light spot after focusing is higher, and the light spot in this area is more obviously segmented from the light spots in other areas, such as Fig.10 The specific imaging effect of the same focal length segmented focusing lens of this embodiment is as follows Fig. 9 and Fig.10 As shown in FIG. 1 , when the light source is set to 25W, the horizontal divergence value of the imaging in this embodiment is substantially consistent with the horizontal divergence value of the convex lens in the background technology, but the maximum luminous intensity of this embodiment is 45000cd. Fig. 9 As shown, the maximum luminous intensity is 12400cd higher than that of the convex lens in the background technology, and the maximum luminous intensity is higher.

[0035] like Figure 5 and Figure 6As shown, the volume of the same focal length segmented focusing lens of this embodiment is set to 6977.1 cubic millimeters, which is 2552.55 cubic millimeters less than the volume of the convex lens of the background technology. Therefore, the same focal length segmented focusing lens of this embodiment can 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 same focal length segmented focusing lens of this embodiment is injection molded, under the premise of setting the mold to one out of four, the injection time only needs 256-329S, which saves 94-121S compared with the production time of the convex lens of the background technology, and the efficiency is significantly improved.

[0036] Embodiment 2

[0037] In this embodiment, refer to Figure 11-13 The difference between the segmented focusing lens with the same focal length and the first embodiment is that the segmented structure also includes a third light-emitting surface connected to the second light-emitting surface, the third light-emitting surface is located above the second light-emitting surface, and a third lens body 203 with thickness is provided between the light-inlet surface and the third light-emitting surface. The edge thickness of the third lens body 203 is less than the edge thickness of the second lens body 201, and the area of ​​the third light-emitting surface is less than the area of ​​the second light-emitting surface. The third lens body 203 is added, and it has the same focusing effect as the second lens body 201. The thickness of the third lens body 203 is smaller than that of the second lens body 201, so its focusing effect is better. The overall three-segment structure performs three-segment focusing, and the overall luminous intensity is higher. Therefore, the three-segment structure connected can enhance the focusing effect in sequence, thereby further improving the luminous intensity of the lens.

[0038] 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 lens with the same focal length, comprising a light-incoming surface and a light-outgoing surface, wherein the light-incoming surface is a flat surface and the light-outgoing surface is a forward convex arc-shaped surface, characterized in that: The light-emitting surface is divided into a segmented structure, which includes a second light-emitting surface and a first light-emitting surface that are connected. The first light-emitting surface is located below the second light-emitting surface. A second lens body with thickness is provided between the light-incoming surface and the second light-emitting surface. A first lens body with thickness is provided between the light-incoming surface and the first light-emitting surface. The edge thickness of the first lens body is greater than the edge thickness of the second lens body. The area of ​​the first light-emitting surface is greater than the area of ​​the second light-emitting surface.

2. The same focal length segmented focusing lens according to claim 1, characterized in that: An end surface of the second lens body connected to the first lens body is provided with a horizontal section, and the thickness of the horizontal section is the difference in edge thickness between the first lens body and the second lens body.

3. The same focal length segmented focusing lens according to claim 1 or 2, characterized in that: The light-incoming surface protrudes in a direction away from the light-emitting surface to form a limiting platform for limiting the position.

4. The same focal length segmented focusing lens according to claim 1 or 2, characterized in that: The side surfaces of the second lens body and the first lens body are edge portions, and the peripheries of the ends of the edge portions close to the light-entering surface are extended outward to form four positioning angles for installation, and positioning holes are reserved on the positioning angles.

5. The same focal length segmented focusing lens according to claim 1, characterized in that: The segmented structure also includes a third light emitting surface connected to the second light emitting surface, the third light emitting surface is located above the second light emitting surface, a third lens body with thickness is provided between the light incident surface and the third light emitting surface, the edge thickness of the third lens body is less than the edge thickness of the second lens body, and the area of ​​the third light emitting surface is less than the area of ​​the second light emitting surface.

6. The same focal length segmented focusing lens according to claim 5, characterized in that: The segmented structure also includes a fourth light-emitting surface connected to the third light-emitting surface, the fourth light-emitting surface is located above the third light-emitting surface, a fourth lens body with thickness is provided between the light-incoming surface and the fourth light-emitting surface, the edge thickness of the fourth lens body is smaller than the edge thickness of the third lens body, and the area of ​​the fourth light-emitting surface is smaller than the area of ​​the third light-emitting surface.

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