Optical element and street lamp

Abstract

The utility model relates to lighting lamp technical field discloses an optical element and street lamp, including body, first light exit surface and second light exit surface, the body is provided with light source chamber, the first light exit surface is located the cavity wall of light source chamber, the first light exit surface, second light exit surface all rise to the direction of departing from light source chamber, the light of light source chamber in turn passes first light exit surface, second light exit surface and emits; the line of first light exit surface and first cross section intersection is first curve, the line of second light exit surface and first cross section intersection is second curve, first cross section passes light source chamber, and parallel to Y axis direction and Z axis direction, the perpendicular distance of first curve to second curve along first curve presents monotone change, and on the same first cross section, the curvature of first curve in first direction gradually increases, and the curvature of second curve in first direction gradually reduces. The utility model can promote the compatibility of street lamp, adapts to various types of road and various lamp arrangement mode.

Description

Technical Field

[0001] This utility model relates to the field of lighting fixtures, and in particular to an optical element and a street lamp. Background Technology

[0002] Streetlights are used for outdoor public lighting to ensure the safety of vehicles and pedestrians at night, and also serve to guide traffic. Streetlights require high levels of uniformity in road surface coverage, luminous efficacy, and penetration.

[0003] There are three main types of street light arrangements: single-sided, island, and double-sided opposite. The layout of street lights is subject to many objective constraints, such as road grade, traffic flow, speed, road width, road surface structure, lamp power, and installation height. Different conditions result in different layouts.

[0004] Due to the low compatibility of current street light products on the market, a street light product can usually only be applied to one type of lane or can only be arranged in one way. This results in existing street light products needing to be customized according to specific road conditions, creating a large number of product models, which is not conducive to mass production.

[0005] Therefore, it is necessary to develop an optical element and street light that can adapt to different types of lanes and layouts. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an optical element that can improve the compatibility of streetlights.

[0007] The technical problem to be solved by this utility model is to provide a street light that can adapt to various types of roads and various lamp arrangement methods, thereby improving compatibility.

[0008] To solve the above-mentioned technical problems, this utility model provides an optical element, including a body, a first light-emitting surface and a second light-emitting surface. A light source cavity is formed on the side of the body opposite to the second light-emitting surface. The first light-emitting surface is located on the cavity wall of the light source cavity. Both the first light-emitting surface and the second light-emitting surface protrude in a direction away from the light source cavity. The first light-emitting surface and the second light-emitting surface are respectively arranged corresponding to the light source cavity. The light in the light source cavity passes through the first light-emitting surface and the second light-emitting surface in sequence before being emitted.

[0009] The line where the first light-emitting surface intersects the first cross-section is the first curve, and the line where the second light-emitting surface intersects the first cross-section is the second curve. The first cross-section passes through the light source cavity and is parallel to the Y-axis and Z-axis directions. The vertical distance from the first curve to the second curve changes monotonically along the first curve. On the same first cross-section, the curvature of the first curve gradually increases in the first direction, and the curvature of the second curve gradually decreases in the first direction.

[0010] As an improvement to the above scheme, the line where the first light-emitting surface intersects with the second cross-section is the third curve, the line where the second light-emitting surface intersects with the second cross-section is the fourth curve, and the second cross-section passes through the light source cavity and is parallel to the X-axis and Z-axis directions.

[0011] The span of the longest first curve on the first light-emitting surface is greater than the span of the longest third curve on the first light-emitting surface;

[0012] The span of the longest fourth curve on the second light-emitting surface is greater than the span of the longest second curve on the second light-emitting surface.

[0013] As an improvement to the above scheme, the third curve is mirror-symmetrical, the fourth curve is mirror-symmetrical, and the third curve and the fourth curve have the same plane of symmetry.

[0014] The distance from the third curve to the fourth curve decreases and then increases along the third curve from one end to the other.

[0015] As an improvement to the above scheme, the formula for the first curve is:

[0016] f(x) = p11 × x 6 +p12×x 5 +p13×x 4 +p14×x 3 +p15×x 2 +p16×x+p17;

[0017] Where P11 = (-5.259e-06, -4.262e-06); P12 = (2.419e-05, 2.814e-05); P13 = (-4.33e-05, 4.57e-05); P14 = (0.00004675, 0.0004755); P15 = (-0.04089, -0.03878); P16 = (0.09446, 0.00896); P17 = (3.665, 3.676).

[0018] As an improvement to the above scheme, the formula for the second curve is:

[0019] f(x) = p21 × x 6 +p22×x 5 +p23×x 4 +p24×x 3 +p25×x 2 +p26×x+p27;

[0020] Where P21 = (-3.522e-06, -2.719e-06); P22 = (-1.636e-05, -1.238e-05); P23 = (8.976e-05, 0.0001993); P24 = (0.0006299, 0.001078); P25 = (-0.04596, -0.04197); P26 = (0.07924, 0.009066); P27 = (5.797, 5.83).

[0021] As an improvement to the above scheme, the formula for the third curve is:

[0022] f(x) = p31 × x 6 +p32×x 5 +p33×x 4 +p34×x 3 +p35×x 2 +p36×x+p37;

[0023] Among them, P31 = (-9.151e-08, -1.048e-08); P32 = (-3.375e-07, -8.994e-08); P33 = (5.332e-06, 9.52e-06); P34 = (3.965e-06, 1.45e-05); P35 = (-0.08938, -0.08932); P36 = (0.001286, 0.001387); P37 = (3.379, 3.38).

[0024] As an improvement to the above scheme, the formula for the fourth curve is:

[0025] f(x) = p41 × x 6 +p42×x 5 +p43×x 4 +p44×x 3 +p45×x 2 +p46×x+p47;

[0026] Where P41 = (-1.04e-07, -9.58e-08); P42 = (-1.192e-08, -5.599e-08); P43 = (-1.643e-05, -1.323e-05); P44 = (-1657e-05, 5.193e-06); P45 = (-0.01098, -0.01065); P46 = (0.0005145, 0.001056); P47 = (6.112, 6.12).

[0027] As an improvement to the above solution, the body includes a first plane and a second plane arranged in parallel. The light source cavity is disposed on the first plane, and the second plane is connected to the second light-emitting surface. The ratio of the distance from the second plane to the first plane to the distance from the second plane to the farthest point from the second light-emitting surface to the first plane is 1:0.96 to 1.25.

[0028] As an improvement to the above scheme, the light source cavity is configured as a first light source cavity array and a second light source cavity array. The first light source cavity array includes a first light source cavity arranged in a linear array, and the second light source cavity array includes a second light source cavity arranged in a linear array. In the X-axis direction, the first light source cavity and the adjacent second light source cavity are staggered from each other, and in the Y-axis direction, the first light source cavity and the adjacent second light source cavity are staggered from each other.

[0029] In addition, this utility model also provides a street light, which includes a light source plate and the above-mentioned optical elements. The surface of the optical elements that forms the light source cavity is attached to the light source plate, and the light source plate is provided with LED light-emitting units corresponding to the light source cavity.

[0030] Implementing this utility model has the following beneficial effects:

[0031] This invention discloses an optical element in which light rays from a light source cavity sequentially pass through a first light-emitting surface and a second light-emitting surface. When the light rays enter the optical element through the first light-emitting surface, a first refraction occurs, followed by a second refraction at the second light-emitting surface. The vertical distance between the first and second curves monotonically changes along the first curve. The light rays emitted from the light source cavity, the first light-emitting surface, and the second light-emitting surface no longer concentrate in the central region but deflect to one side of the light source cavity, i.e., in the longitudinal direction (Y-axis direction). Simultaneously, on the same first cross-section, the curvature of the first curve gradually increases in the first direction, while the curvature of the second curve gradually decreases in the first direction. This causes the light in the light source cavity to be deflected to different degrees at different points when it passes through the first light-emitting surface and the second light-emitting surface, thus expanding the light-emitting illumination range and the uniformity of longitudinal light emission. For streetlights, the light can be deflected towards the road to be illuminated. The change in the illumination direction allows more light to be projected onto the road surface, improving light utilization. To a certain extent, it increases the effective illumination area on the road surface and the uniformity of illumination in the width direction of the road surface (i.e., the Y-axis direction). The polarization effect is ideal and can also ensure luminous efficiency, making the streetlight highly compatible and suitable for various street light arrangements and various lane roads. At the same time, it reduces energy waste, light pollution and glare.

[0032] The public streetlights use multi-directional light control to ensure that more light is evenly emitted onto the road, achieving a highly uniform and efficient illumination effect. They can meet the lighting needs of 2 to 5 lanes at pole heights of 10 and 12 meters, and the lamps can be arranged in various ways without the need to replace them, offering good compatibility. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of an optical element according to the present invention;

[0034] Figure 2 yes Figure 1 Top view;

[0035] Figure 3 yes Figure 1 A three-dimensional structural diagram of the optical element from another perspective.

[0036] Figure 4 yes Figure 2 Schematic diagram of the AA section structure;

[0037] Figure 5 yes Figure 2 Schematic diagram of the BB cross-section structure;

[0038] Figure 6 yes Figure 2 A schematic diagram of the CC section structure;

[0039] Figure 7 yes Figure 2 Schematic diagram of the DD cross-section structure;

[0040] Figure 8 This is a schematic diagram of light emission from an optical element on its first cross-section;

[0041] Figure 9 This is a schematic diagram of light emission from an optical element on its second cross-section;

[0042] Figure 10 This is a schematic diagram of an embodiment of a street lamp according to the present invention;

[0043] Figure 11 This is a schematic diagram of the light emitted from the side of a street lamp.

[0044] Figure 12 This is a diagram showing the light emitted from the front of a street lamp.

[0045] Figure 13 It is a schematic diagram of the layout and lighting effect of streetlights on the road. Detailed Implementation

[0046] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0047] like Figures 1 to 9 As shown, this utility model discloses an embodiment of an optical element, including a body 1, a first light-emitting surface 2, and a second light-emitting surface 3. A light source cavity 111 is formed on the side of the body 1 opposite to the second light-emitting surface 3. The first light-emitting surface 2 is located on the cavity wall of the light source cavity 111. Both the first light-emitting surface 2 and the second light-emitting surface 3 protrude in a direction away from the light source cavity 111. The first light-emitting surface 2 and the second light-emitting surface 3 are arranged in a one-to-one correspondence with the light source cavity 111. Light rays in the light source cavity 111 are emitted after passing through the first light-emitting surface 2 and the second light-emitting surface 3 in sequence. The line intersecting the first light-emitting surface 2 and the first cross-section is the first curve 21, and the line intersecting the second light-emitting surface 3 and the first cross-section is the second curve 31. The first cross-section passes through the light source cavity 111 and is parallel to the Y-axis and Z-axis directions. The vertical distance from the first curve 21 to the second curve 31 changes monotonically along the first curve 21. On the same first cross-section, the curvature of the first curve 21 gradually increases in the first direction, that is, the radius of curvature gradually decreases; the curvature of the second curve 31 gradually decreases in the first direction, that is, the radius of curvature gradually increases.

[0048] In this embodiment, light rays within the light source cavity 111 sequentially pass through the first light-emitting surface 2 and the second light-emitting surface 3 of the optical element before exiting. When the light rays enter the optical element through the first light-emitting surface 2, a first refraction occurs, followed by a second refraction at the second light-emitting surface 3. The vertical distance from the first curve 21 to the second curve 31 monotonically changes along the first curve 21. The light rays exiting from the light source cavity 111, the first light-emitting surface 2, and the second light-emitting surface 3 are no longer concentrated in the central region but deflected to one side of the light source cavity 111, i.e., towards the longitudinal direction (Y-axis direction). Simultaneously, on the same first cross-section, the curvature of the first curve 21 gradually increases in the first direction, while the curvature of the second curve 31 gradually increases in the first direction. As the curvature gradually decreases, the light rays within the light source cavity 111 are deflected to varying degrees at different points as they pass through the first light-emitting surface 2 and the second light-emitting surface 3, thus expanding the light-emitting illumination range and longitudinal light uniformity. For streetlights, the light can be deflected towards the road to be illuminated. This change in illumination direction allows more light to be projected onto the road surface, improving light utilization and increasing the effective illumination area on the road surface to a certain extent, as well as the illumination uniformity in the road width direction (i.e., the Y-axis direction). The polarization effect is ideal while also ensuring luminous efficiency, making the streetlight highly compatible and suitable for various street light arrangements and multiple lane roads. At the same time, it reduces energy waste, light pollution, and glare.

[0049] In this embodiment, the first direction is the direction opposite to the polarization direction along the Y-axis.

[0050] Specifically, in this embodiment, the optical element body 1 includes a first plane 11 and a second plane 12 arranged in parallel. The light source cavity 111 is disposed on the first plane 11, and the second plane 12 is connected to the second light-emitting surface 3. The optical element is preferably made of high borosilicate glass, which has no frosting, better fire resistance, and high physical strength.

[0051] It should be noted that, to facilitate the description of the specific structure of the first light-emitting surface 2 and the second light-emitting surface 3 on the optical element, this embodiment provides two reference surfaces, namely the first cross-section and the second cross-section mentioned below, and the positions of the first and second cross-sections are described using three-dimensional spatial coordinates. The first cross-section passes through the light source cavity 111 and is parallel to the Y-axis and Z-axis directions, while the second cross-section passes through the light source cavity 111 and is parallel to the X-axis and Z-axis directions. The Z-axis direction corresponds to the depth direction of the light source cavity 111, the X-axis is transverse, and the Y-axis is longitudinal.

[0052] The line where the first light-emitting surface 2 intersects with the second cross-section is the third curve 22, and the line where the second light-emitting surface 3 intersects with the second cross-section is the fourth curve 32. The second cross-section passes through the light source cavity 111 and is parallel to the X-axis and Z-axis directions. The first curve 21, the second curve 31, the third curve 22, and the fourth curve 32 all bulge towards the side away from the light source cavity 111. The first light-emitting surface 2 and the second light-emitting surface 3 of this structure cause the light emitted by the light source in the light source cavity 111 to exit through a convex lens.

[0053] To ensure more uniform transverse light emission, in this embodiment, the third curve 22 of the first light-emitting surface 2 in the second cross section and the fourth curve 32 of the second light-emitting surface 3 in the second cross section are mirror-symmetrical, and the third curve 22 and the fourth curve 32 have the same plane of symmetry, making their transverse (i.e., X-axis direction) light emission symmetrical.

[0054] Specifically, the span of the longest curve 21 on the first light-emitting surface 2 is greater than the span of the longest curve 22 on the first light-emitting surface 2, meaning the maximum lateral span of the first light-emitting surface 2 is less than its maximum longitudinal span; similarly, the span of the longest curve 32 on the second light-emitting surface 3 is greater than the span of the longest curve 31 on the second light-emitting surface 3, meaning the maximum lateral span of the second light-emitting surface 3 is greater than its maximum longitudinal span. This causes the light emission angle to shift in a specific direction, increasing the effective illumination area and providing a wider coverage of the road surface.

[0055] It should be noted that the span of the curve mentioned here refers to the distance between the two ends of the curve.

[0056] In this embodiment, the opening profile of the light source cavity 111 on the first plane 11 is symmetrical about the Y-axis and asymmetrical about the X-axis. Specifically, in the first direction of the Y-axis, passing sequentially through the first end and the second end of the light source cavity 111, the opening width of the light source cavity 111 on the first plane 11 first increases and then decreases, with the opening at the first end being relatively narrow and the opening at the second end being relatively wide. The opening width reaches its maximum at 1 / 5 to 1 / 3 of the distance from the first light-emitting surface 2, that is, the longest first curve 21 on the first light-emitting surface 2 is located at 1 / 5 to 1 / 3 of the distance from the first light source cavity 111.

[0057] Furthermore, in this embodiment, the distance from the third curve 22 to the fourth curve 32 first decreases and then increases along the third curve 22, that is, the distance from the third curve 22 to the fourth curve 32 first decreases and then increases along the third curve 22, which makes the lateral light output more extensive and uniform.

[0058] In this embodiment, the ratio of the distance from the second plane 12 to the first plane 11 to the distance from the second plane 12 to the furthest point of the second light-emitting surface 3 from the first plane 11 is 1:0.96 to 1.25. The furthest point of the second light-emitting surface 3 from the first plane 11 is the highest point of the convex lens. In this embodiment, the optical element thickness is 5.5 mm, the distance between the first plane 11 and the second plane 12 is 5.5 mm, the distance from the vertex of the second light-emitting surface 3 to the bottom surface of the light-emitting element is 11.55 mm, and the light source cavities 111 on the first light-emitting surface 2 are uniformly arranged in multiple rows and columns.

[0059] To facilitate a more detailed description of the shapes of the first light-emitting surface 2 and the second light-emitting surface 3, this utility model provides formulas for the first curve 21, the second curve 31, the third curve 22, and the fourth curve 32, specifically:

[0060] The formula for the first curve 21 is:

[0061] f(x) = p11 × x 6 +p12×x 5 +p13×x 4 +p14×x 3 +p15×x 2 +p16×x+p17;

[0062] Where P11 = (-5.259e-06, -4.262e-06); P12 = (2.419e-05, 2.814e-05); P13 = (-4.33e-05, 4.57e-05); P14 = (0.00004675, 0.0004755); P15 = (-0.04089, -0.03878); P16 = (0.09446, 0.00896); P17 = (3.665, 3.676).

[0063] In this embodiment, the preferred values ​​for the relevant parameters of the first curve 21 formula are: P11 = -4.761e-06; P12 = 2.616e-05; P13 = 1.204e-06; P14 = -0.0003215; P15 = -0.03984; P16 = -0.09203; P17 = 3.671.

[0064] The formula for the second curve 31 is:

[0065] f(x) = p21 × x 6 +p22×x 5 +p23×x 4 +p24×x 3 +p25×x 2 +p26×x+p27;

[0066] Where P21 = (-3.522e-06, -2.719e-06); P22 = (-1.636e-05, -1.238e-05); P23 = (8.976e-05, 0.0001993); P24 = (0.0006299, 0.001078); P25 = (-0.04596, -0.04197); P26 = (0.07924, 0.009066); P27 = (5.797, 5.83).

[0067] In this embodiment, the preferred values ​​for the relevant parameters of the second curve 31 formula are: P21 = -3.12e-06; P22 = -1.437e-05; P23 = 0.0001445; P24 = -0.0008538; P25 = -0.04396; P26 = -0.08495; P27 = 5.814.

[0068] The formula for the third curve 22 is:

[0069] f(x) = p31 × x 6 +p32×x 5 +p33×x 4 +p34×x 3 +p35×x 2 +p36×x+p37;

[0070] Among them, P31 = (-9.151e-08, -1.048e-08); P32 = (-3.375e-07, -8.994e-08); P33 = (5.332e-06, 9.52e-06); P34 = (3.965e-06, 1.45e-05); P35 = (-0.08938, -0.08932); P36 = (0.001286, 0.001387); P37 = (3.379, 3.38).

[0071] In this embodiment, the preferred values ​​for the relevant parameters of the third curve 22 formula are: P2 = -5.1e-08; P32 = -2.137e-07; P33 = 7.426e-06; P4 = 39.2e-06; P35 = -0.08935; P36 = 0.001337; P37 = 3.38.

[0072] The formula for the fourth curve 32 is as follows:

[0073] f(x) = p41 × x 6 +p42×x 5 +p43×x 4 +p44×x 3 +p45×x2 +p46×x+p47;

[0074] Where P41 = (-1.04e-07, -9.58e-08); P42 = (-1.192e-08, -5.599e-08); P43 = (-1.643e-05, -1.323e-05); P44 = (-1657e-05, 5.193e-06); P45 = (-0.01098, -0.01065); P46 = (0.0005145, 0.001056); P47 = (6.112, 6.12).

[0075] In this embodiment, the preferred values ​​for the relevant parameters of the fourth curve 32 formula are: P41 = -9.991e-08; P42 = 2.204e-08; P43 = -1.483e-05; P44 = -5.687e-06; P45 = -0.01082; P46 = 0.0002706; P47 = 6.116.

[0076] Since streetlights are generally equipped with multiple point light sources, in this embodiment, the light source cavities 111 are arranged in multiple ways, and the first light-emitting surface 2 and the second light-emitting surface 3 are respectively arranged in a one-to-one correspondence with the light source cavities 111, so that the light emitted from each light source cavity 111 can be emitted with longitudinal offset and wide and uniform light in the lateral direction.

[0077] In this embodiment, the light source cavity 111 on the first plane 11 is preferably configured as a first light source cavity array and a second light source cavity array. The first light source cavity array includes a first light source cavity a arranged in a linear array, and the second light source cavity array includes a second light source cavity b arranged in a linear array. In the X-axis direction, the first light source cavity a and the adjacent second light source cavity b are staggered from each other, and in the Y-axis direction, the first light source cavity a and the adjacent second light source cavity b are staggered from each other, so that the second light emitting surface 3 can form a continuous light emitting curved surface.

[0078] Assuming an ideal optical system, with a Lambertian light source within the cavity 111, most of the light rays within the cavity are refracted into the convex lens. The light is then reflected by the edges of the convex lens with varying curvatures. This refraction process follows the law of refraction, i.e., the formula n1sinθ1=n2sinθ2, where θ1 and θ2 are the angle of incidence and the angle of refraction, respectively. n1 is the refractive index of air, and n2 is borosilicate glass with a refractive index of 1.47. Given that the incident angle of the Lambertian light source is 120°, the critical angle for light entering air from the glass is approximately 41.5°. Therefore, when light exits through the second exiting surface 3, if the incident angle is greater than the critical angle, the light will undergo total internal reflection within the lens and cannot exit. For common spherical lenses, to achieve a large exit angle of 135°, there will always be 3.5° of light undergoing total internal reflection within the lens; this portion of the totally reflected light is the loss light.

[0079] In this embodiment, the optical element controls the thickness of the body 1 and the convex lens, the shape of the light source cavity 111, and the continuous curved light emission design. This achieves a large 135° emitted light angle while improving the light loss caused by total internal reflection, thus ensuring light efficiency while achieving the ideal polarization effect.

[0080] In addition, combined Figures 10 to 13 This utility model also provides a street lamp, which includes a light source plate 4 and the aforementioned optical element. The surface of the optical element where the light source cavity 111 is formed is attached to the light source plate 4, that is, the first plane 11 on the optical element body 1 is attached to the light source plate 4. LED light-emitting units corresponding to the light source cavity 111 are disposed on the light source plate 4, and the light source plate 4 is connected to a heat sink 5. The LED light-emitting units are selected from high color rendering, high energy efficiency, and long lifespan LED devices 7070, or other types of LED devices can be selected as needed. The optical element is disposed within a frame 6, which is connected to the heat sink 5. In this embodiment, the thickness of the optical element body 1 is basically the same as the thickness of the frame 6, and the arrangement of the light source cavities 111 on the optical element, as well as the design of the first light-emitting surface 2 and the second light-emitting surface 3, ensure that the light meets the illumination requirements while minimizing illumination onto the frame 6, thus improving light utilization. Optical components enable the lamp to control light in multiple directions, directing the light towards the road and achieving a high degree of uniformity. This can meet the lighting needs of 2 to 5 lanes at 10-meter and 12-meter pole heights. At the same time, the lamp is suitable for various street light arrangements without the need to replace the lamps.

[0081] It should be noted that for road sections with three lanes or less, the streetlights in this embodiment do not need to be tilted for illumination. When applied to four-lane or five-lane roads, the streetlights can be adjusted vertically to change the direction of the streetlights to achieve a larger area of ​​illumination.

[0082] The streetlights of this embodiment are compared with those of commercially available streetlights with the same light source module (same luminous flux and color temperature) at the same installation height (and the same installation angle for lanes under three lanes) and under the same external environment. The simulated comparison data at installation heights of 10 meters and 12 meters are shown in Table 1 and Table 2, respectively:

[0083] Table 1. Simulated comparison data at an installation height of 10 meters.

[0084]

[0085]

[0086] Table 2. Simulated comparison data at an installation height of 12 meters.

[0087]

[0088] The streetlights of this embodiment were applied to a four-lane road in different arrangements, with an installation height of 12 meters for illumination. The simulation data are shown in Table 3.

[0089] Table 3 Simulation data for different layouts

[0090]

[0091]

[0092] Furthermore, by comparing the relevant values ​​in the national standard CJJ45-2015 shown below, it can be seen that the street light illumination in this embodiment meets the national standards for road and street lighting in terms of road surface brightness, road surface illuminance, and glare value, and most of the data are better than the comparative example. The street light in this embodiment is suitable for various street light arrangements and is adapted to various lane roads, achieving ideal lighting effects.

[0093] Table 3.3.1 Standard values ​​for lighting in motor vehicle lanes

[0094]

[0095] Conventional streetlights are often limited to one type of lane and can only be arranged in a single configuration. For example, a conventional three-lane streetlight cannot be used on a five-lane road. However, the streetlight of this invention, through the design of its optical element structure, precisely controls light from multiple directions, enabling the streetlight to achieve high luminous efficiency and good lighting uniformity. It can be used for two-lane, three-lane, four-lane, and even five-lane roads, and can be installed at least at two heights, 10 meters and 12 meters. There is no need to change the lamps for different lane types of roads. Its wide applicability makes up for the problem that conventional streetlights can only be used for one type of lane and can only be arranged in a single configuration. It can better meet the needs of various street lighting, not only achieving ideal road lighting effects, but also saving costs.

[0096] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An optical element, characterized by, The device includes a body, a first light-emitting surface, and a second light-emitting surface. A light source cavity is formed on the side of the body opposite to the second light-emitting surface. The first light-emitting surface is located on the cavity wall of the light source cavity. Both the first light-emitting surface and the second light-emitting surface protrude in a direction away from the light source cavity. The first light-emitting surface and the second light-emitting surface are respectively arranged corresponding to the light source cavity. The light in the light source cavity passes through the first light-emitting surface and the second light-emitting surface in sequence before being emitted. The line where the first light-emitting surface intersects the first cross-section is the first curve, and the line where the second light-emitting surface intersects the first cross-section is the second curve. The first cross-section passes through the light source cavity and is parallel to the Y-axis and Z-axis directions. The vertical distance from the first curve to the second curve changes monotonically along the first curve. On the same first cross-section, the curvature of the first curve gradually increases in the first direction, and the curvature of the second curve gradually decreases in the first direction.

2. The optical element of claim 1, wherein The line where the first light-emitting surface intersects the second cross-section is the third curve, and the line where the second light-emitting surface intersects the second cross-section is the fourth curve. The second cross-section passes through the light source cavity and is parallel to the X-axis and Z-axis directions. The span of the longest first curve on the first light-emitting surface is greater than the span of the longest third curve on the first light-emitting surface; The span of the longest fourth curve on the second light-emitting surface is greater than the span of the longest second curve on the second light-emitting surface.

3. The optical element of claim 2, wherein The third curve is mirror-symmetrical, the fourth curve is mirror-symmetrical, and the third curve and the fourth curve have the same plane of symmetry. The distance from the third curve to the fourth curve decreases and then increases along the third curve from one end to the other.

4. The optical element of claim 1, wherein The formula for the first curve is: ； Where P11=(-5.259e-06, -4.262e-06); P12=(2.419e-05, 2.814e-05); P13=(-4.33e-05, 4.57e-05); P14=(0.00004675, 0.0004755); P15=(-0.04089, -0.03878); P16=(0.09446, 0.00896); P17=(3.665, 3.676).

5. The optical element of claim 1, wherein The formula for the second curve is ； Where P21=(-3.522e-06, -2.719e-06); P22=(-1.636e-05, -1.238e-05); P23=(8.976e-05, 0.0001993); P24=(0.0006299, 0.001078); P25=(-0.04596, -0.04197); P26=(0.07924, 0.009066); P27=(5.797, 5.83).

6. The optical element of claim 2, wherein The formula for the third curve is: ； Among them, P31 = (-9.151e-08, -1.048e-08); P32 = (-3.375e-07, -8.994e-08); P33 = (5.332e-06, 9.52e-06); P34 = (3.965e-06, 1.45e-05); P35 = (-0.08938, -0.08932); P36 = (0.001286, 0.001387); P37 = (3.379, 3.38).

7. The optical element of claim 2, wherein The formula for the fourth curve is: ； Where P41=(-1.04e-07, -9.58e-08); P42=(-1.192e-08, -5.599e-08); P43=(-1.643e-05, -1.323e-05); P44=(-1657e-05, 5.193e-06); P45=(-0.01098, -0.01065); P46=(0.0005145, 0.001056); P47=(6.112, 6.12).

8. The optical element of claim 1, wherein The body includes a first plane and a second plane arranged in parallel. The light source cavity is disposed on the first plane. The second plane is connected to the second light-emitting surface. The ratio of the distance from the second plane to the first plane to the distance from the second plane to the farthest point from the second light-emitting surface to the first plane is 1:0.96~1.

25.

9. The optical element of claim 2, wherein, The light source cavity is configured as a first light source cavity array and a second light source cavity array. The first light source cavity array includes a first light source cavity arranged in a linear array, and the second light source cavity array includes a second light source cavity arranged in a linear array. In the X-axis direction, the first light source cavity and the adjacent second light source cavity are staggered from each other, and in the Y-axis direction, the first light source cavity and the adjacent second light source cavity are staggered from each other.

10. A street light, characterized by It includes a light source plate and an optical element as described in any one of claims 1 to 9, wherein the surface of the optical element that forms the light source cavity is attached to the light source plate, and the light source plate is provided with an LED light-emitting unit corresponding to the light source cavity.

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