Optical element and street lamp
By designing optical components with specific curve distribution, the street light lines are deflected in a specific direction, expanding the illumination range and uniformity, the problem of insufficient compatibility of street lights is solved, and efficient lighting is achieved that adapts to a variety of roads and layout methods.
Patent Information
- Application Number
- CN202510714801.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-08-19
AI Technical Summary
The existing street light products are not very compatible and cannot adapt to different types of lanes and arrangement methods, resulting in the need to customize them according to the specific road conditions, affecting mass production.
An optical element is designed, including a first light-exit surface and a second light-exit surface. The light rays are emitted in sequence through these two. The first light-exit surface and the second light-exit surface are distributed in a specific curve. The light rays in the light source cavity are refracted and refracted multiple times to realize the deflection of the light rays in a specific direction, expanding the illumination range and uniformity.
Improves the compatibility of street lights, can adapt to various types of road and lamp arrangement methods, reduces energy waste and light pollution, and achieves high light efficiency and uniform lighting effects.
Smart Images
Figure CN120506616A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lighting fixtures, and in particular to an optical element and a street lamp. Background Art
[0002] Streetlights are used for outdoor public lighting, ensuring nighttime driving and pedestrian safety while also guiding traffic. They place high demands on road surface coverage uniformity, light efficiency, and light penetration.
[0003] There are three types of street light arrangements: single-sided, island, and double-sided. The layout of street lights is subject to many objective conditions, such as road grade, traffic volume, speed, road width, road surface structure, lamp power, and installation height. Different conditions lead to different layouts.
[0004] Due to the low compatibility of street light products currently on the market, one street light product can usually only be used for one type of lane, or can only be arranged in one way. As a result, existing street light products need to be customized according to specific road conditions, resulting in 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 for street lights to adapt to different types of lanes and arrangements. Summary of the Invention
[0006] The technical problem to be solved by the present invention is to provide an optical element that can improve the compatibility of street lamps.
[0007] The technical problem to be solved by the present invention is to provide a street lamp that can adapt to various types of roads and various lamp arrangements to improve compatibility.
[0008] To solve the above technical problems, the present invention provides an optical element, comprising a body, a first light emitting surface, and a second light emitting surface. A light source cavity is defined on a side of the body opposite to the second light emitting surface. The first light emitting surface is located on a cavity wall of the light source cavity. Both the first light emitting surface and the second light emitting surface are raised in a direction away from the light source cavity. The first light emitting surface and the second light emitting surface are disposed correspondingly to the light source cavity. Light within the light source cavity is emitted sequentially through the first light emitting surface and the second light emitting surface.
[0009] The line where the first light-emitting surface intersects the first cross-section is a first curve, and the line where the second light-emitting surface intersects the first cross-section is a second curve. The first cross-section passes through the light source cavity and is parallel to the Y-axis and the Z-axis directions. The vertical distance from the first curve to the second curve changes monotonically along the first curve, and on the same first cross-section, the curvature of the first curve in the first direction gradually increases, and the curvature of the second curve in the first direction gradually decreases.
[0010] As an improvement to the above solution, a line where the first light emitting surface intersects the second cross section is a third curve, a line where the second light emitting surface intersects the second cross section is a fourth curve, and the second cross section passes through the light source cavity and is parallel to the X-axis and the Z-axis.
[0011] The longest span of the first curve on the first light-emitting surface is greater than the longest span of the third curve on the first light-emitting surface;
[0012] The longest span of the fourth curve on the second light-emitting surface is greater than the longest span of the second curve on the second light-emitting surface.
[0013] As an improvement to the above solution, the third curve is mirror-symmetrical, the fourth curve is mirror-symmetrical, and the third curve and the fourth curve have the same symmetry plane;
[0014] The distance from the third curve to the fourth curve first decreases and then increases from one end to the other end of the third curve.
[0015] As an improvement to the above solution, the formula of 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] Among them, 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 solution, the formula of 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] Among them, 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 solution, the formula of 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, P second curve 31 = (-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 solution, the formula of 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] Among them, 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-mentioned scheme, the main body includes a first plane and a second plane arranged in parallel, the light source cavity is arranged on the first plane, the second plane is connected to the second light-emitting surface, and the ratio of the distance from the second plane to the first plane to the distance from the second plane to the second light-emitting surface farthest from the first plane is 1:0.96~1.25.
[0028] As an improvement to the above scheme, the light source cavity is arranged 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, the second light source cavity array includes a second light source cavity arranged in a linear array, the first light source cavity and the adjacent second light source cavity are staggered with each other in the X-axis direction, and the first light source cavity and the adjacent second light source cavity are staggered with each other in the Y-axis direction.
[0029] In addition, the present invention also provides a street lamp, which includes a light source board and the above-mentioned optical element, the surface of the optical element where the light source cavity is formed fits the light source board, and the light source board is provided with an LED light-emitting unit corresponding to the light source cavity.
[0030] The implementation of the present invention has the following beneficial effects:
[0031] The present invention discloses an optical element, wherein light in a light source cavity sequentially passes through a first light emitting surface and a second light emitting surface of the optical element to be emitted. When the light in the light source cavity passes through the first light emitting surface and enters the optical element, a first refraction occurs, and a second refraction occurs at the second light emitting surface. The vertical distance from the first curve to the second curve changes monotonically along the first curve. The light emitted from the light source cavity, the first light emitting surface, and the second light emitting surface is no longer concentrated in a central area, but deflected toward one side of the light source cavity, that is, deflected toward the longitudinal direction (that is, the Y-axis direction). At the same time, on the same first cross-section, the curvature of the first curve in the first direction gradually increases, and the curvature of the second curve in the first direction gradually decreases. The light in the light source cavity is deflected to varying degrees at various locations when passing through the first light-emitting surface and the second light-emitting surface, thereby expanding the light irradiation range and longitudinal light uniformity. For street lamps, the light can be deflected toward the road to be illuminated. The change in irradiation direction allows more light to be projected onto the road surface, improving light utilization and, to a certain extent, increasing the effective irradiation area on the road surface and the light uniformity in the road width direction (i.e., the Y-axis direction). The polarization effect is ideal while also ensuring light efficiency, making the street lamp highly compatible and applicable to various street lamp arrangements and various lane roads, while reducing energy waste, light pollution, and glare.
[0032] The public street lights use multi-directional light control to allow more light to be 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 two lamp pole heights of 10 and 12 meters. The lamps can be arranged in a variety of ways without the need to replace the lamps, and have good compatibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 This is a schematic diagram of the three-dimensional structure of an optical element according to an embodiment of the present invention;
[0034] Figure 2 yes Figure 1 A top view of
[0035] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the optical element from another perspective
[0036] Figure 4 yes Figure 2 AA cross-sectional structural diagram;
[0037] Figure 5 yes Figure 2 BB cross-sectional structure diagram;
[0038] Figure 6 yes Figure 2 Schematic diagram of CC cross-section structure;
[0039] Figure 7 yes Figure 2 DD cross-sectional structure diagram;
[0040] Figure 8 is a schematic diagram of light emission from the optical element at the first cross section;
[0041] Figure 9 is a schematic diagram of light emission from the optical element at the second cross section;
[0042] Figure 10 This is a schematic structural diagram of an embodiment of a street lamp of the present invention;
[0043] Figure 11 This is a schematic diagram of light emission from the side of a street lamp
[0044] Figure 12 This is a schematic diagram of the light emission from the front of the street lamp
[0045] Figure 13 It is a schematic diagram of the arrangement of street lights on the road and a schematic diagram of the lighting effect. DETAILED DESCRIPTION
[0046] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.
[0047] like Figures 1 to 9 As shown, the present invention discloses an embodiment of an optical element, comprising a body 1, a first light emitting surface 2, and a second light emitting surface 3. A light source cavity 111 is defined on a 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 bulge in a direction away from the light source cavity 111. The first light emitting surface 2 and the second light emitting surface 3 are disposed in a one-to-one correspondence with the light source cavity 111. Light within the light source cavity 111 is emitted sequentially through the first light emitting surface 2 and the second light emitting surface 3. The line where the first light-emitting surface 2 intersects the first cross-section is a first curve 21, and the line where the second light-emitting surface 3 intersects the first cross-section is a second curve 31. The first cross-section passes through the light source cavity 111 and is parallel to the Y-axis direction and the Z-axis direction. The vertical distance from the first curve 21 to the second curve 31 changes monotonically along the first curve 21, and on the same first cross-section, the curvature of the first curve 21 in the first direction gradually increases, that is, the radius of curvature gradually decreases; the curvature of the second curve 31 in the first direction gradually decreases, that is, the radius of curvature gradually increases.
[0048] In this embodiment, the light in the light source cavity 111 passes through the first light emitting surface 2 and the second light emitting surface 3 of the optical element in sequence. When the light in the light source cavity 111 enters the optical element through the first light emitting surface 2, it undergoes the first refraction, and undergoes the second refraction on the second light emitting surface 3. The vertical distance from the first curve 21 to the second curve 31 changes monotonically along the first curve 21. The light emitted from the light source cavity 111, the first light emitting surface 2, and the second light emitting surface 3 is no longer concentrated in the central area, but deflected to one side of the light source cavity 111, that is, deflected in the longitudinal direction (that is, the Y-axis direction). At the same time, on the same first cross-section, the curvature of the first curve 21 in the first direction gradually increases, and the curvature of the second curve 31 in the first direction gradually increases. The curvature gradually decreases, so that the light in the light source cavity 111 is deflected to varying degrees at various locations when passing through the first light-emitting surface 2 and the second light-emitting surface 3, thereby expanding the light irradiation range and the longitudinal light uniformity; for street lamps, you can choose to deflect toward the road to be illuminated. The change in irradiation direction can allow more light to be projected onto the road surface, thereby improving the utilization rate of light and, to a certain extent, increasing the effective irradiation area on the road surface, as well as the light uniformity in the width direction of the road surface (i.e., the Y-axis direction). The polarization effect is ideal and the light efficiency can also be guaranteed, making the street lamp highly compatible and applicable to various arrangements of street lamps and various lanes and roads, while reducing 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, the body 1 of the optical element of this embodiment includes a first plane 11 and a second plane 12 arranged in parallel, wherein the light source cavity 111 is provided 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 is frosted, has better fire resistance, and high physical strength.
[0051] It should be noted that, in order 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 that appears below, and describes the positions of the first cross-section and the second cross-section with the help of three-dimensional spatial coordinates. The first cross-section passes through the light source cavity 111 and is parallel to the Y-axis and the Z-axis directions, and the second cross-section passes through the light source cavity 111 and is parallel to the X-axis and the Z-axis directions. The Z-axis direction corresponds to the depth direction of the light source cavity 111, the X-axis is horizontal, and the Y-axis is vertical.
[0052] The line where the first light exit surface 2 intersects the second cross section is a third curve 22, and the line where the second light exit surface 3 intersects the second cross section is a fourth curve 32. The second cross section passes through the light source cavity 111 and is parallel to the X-axis and the Z-axis. The first curve 21, the second curve 31, the third curve 22, and the fourth curve 32 all bulge toward the side away from the light source cavity 111. With this structure, the first light exit surface 2 and the second light exit surface 3 allow light emitted from the light source in the light source cavity 111 to exit through a convex lens.
[0053] In order to make the lateral light emission more uniform, 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 of this embodiment are mirror-symmetrical, and the third curve 22 and the fourth curve 32 have the same symmetry plane, so that the light emission is symmetrical in the horizontal direction (i.e., the X-axis direction).
[0054] The longest span of the first curve 21 on the first light emitting surface 2 is greater than the longest span of the third curve 22 on the first light emitting surface 2, meaning the maximum transverse span of the first light emitting surface 2 is smaller than the maximum longitudinal span. The longest span of the fourth curve 32 on the second light emitting surface 3 is greater than the longest span of the second curve 31 on the second light emitting surface 3, meaning the maximum transverse span of the second light emitting surface 3 is greater than the maximum longitudinal span. This allows the light emission angle to shift in a specific direction, increasing the effective illumination area and providing wide 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 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 light source cavity 111, that is, the longest first curve 21 on the first light exit surface 2 is located at 1 / 5 to 1 / 3 of the light source cavity 111.
[0057] In addition, 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, so that the lateral light output is wider and more uniform.
[0058] In this embodiment, the ratio of the distance between the second plane 12 and the first plane 11 to the distance between the second plane 12 and the second light-emitting surface 3 at its farthest point from the first plane 11 is 1:0.96-1.25. The farthest point between the second light-emitting surface 3 and the first plane 11 is the highest point of the convex lens. The thickness of the optical element in this embodiment 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 evenly arranged in multiple rows and columns.
[0059] To facilitate further detailed description of the shapes of the first light exiting surface 2 and the second light exiting surface 3, the present invention provides formulas for the first curve 21, the second curve 31, the third curve 22, and the fourth curve 32. Specifically:
[0060] The formula of 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] Among them, 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 values of the relevant parameters of the formula of the first curve 21 are preferably P11=-4.761e-06; P12=2.616e-05; P13=1.204e-06; P14=-0.0003215; P15=-0.03984; P16=-0.09203; and P17=3.671.
[0064] The formula of 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] Among them, 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 relevant parameter values of the formula of the second curve 31 are preferably P21=-3.12e-06; P22=-1.437e-05; P23=0.0001445; P24=-0.0008538; P25=-0.04396; P26=-0.08495; and P27=5.814.
[0068] The formula of 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, P second curve 31 = (-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 values of the relevant parameters of the formula of the third curve 22 are preferably P second curve 31 = -5.1e-08; P32 = -2.137e-07; P33 = 7.426e-06; P4 = 39.2 second curve 31e-06; P35 = -0.08935; P36 = 0.001337; P37 = 3.38.
[0072] The formula of the fourth curve 32 is:
[0073] f(x)=p41×x 6 +p42×x 5 +p43×x 4 +p44×x 3 +p45×x 2 +p46×x+p47;
[0074] Among them, 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 relevant parameter values of the formula of the fourth curve 32 are preferably P41=-9.991e-08; P42=2.204e-08; P43=-1.483e-05; P44=-5.687e-06; P45=-0.01082; P46=0.0002706; and P47=6.116.
[0076] Since street lamps generally have multiple point light sources, in this embodiment, the light source cavities 111 are arranged into multiple ones, and 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 cavities 111, so that the light emitted from each light source cavity 111 can be emitted in a longitudinally offset and laterally wide and uniform light.
[0077] In this embodiment, the light source cavity 111 on the first plane 11 is preferably set as a first light source cavity array and a second light source cavity array, wherein 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 with each other, and in the Y-axis direction, the first light source cavity a and the adjacent second light source cavity b are staggered with 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 the light source within cavity 111 being a Lambertian light source, most of the light within cavity 111 is refracted into the convex lens, where it is then refracted and reflected by the edges of the convex lens, which have different curvatures. This refraction process satisfies the law of refraction, i.e., the formula n1sinθ1 = n2sinθ2, where θ1 and θ2 are the angles of incidence and refraction, respectively. n1 is the refractive index of air, and n2 is borosilicate glass. The refractive index of borosilicate glass is 1.47. The angle of incidence for the Lambertian light source is 120°. It can be seen that when light enters air from glass, the critical angle is approximately 41.5°. Therefore, when light exits from the second light-emitting surface 3, if the angle of incidence is greater than the critical angle, the light will be totally reflected within the lens and unable to exit. For a common spherical lens, to achieve a 135° output angle, light at an angle of 3.5° will always be totally reflected within the lens. This portion of totally reflected light is the loss light.
[0079] The optical element of this embodiment controls the thickness of the main body 1 and the convex lens, the shape of the light source cavity 111, and the continuous curved light output design, thereby obtaining a 135° large-angle output light while improving the light loss caused by total reflection, achieving an ideal polarization effect while also ensuring light efficiency.
[0080] In addition, combined Figures 10 to 13The present invention also provides a street lamp, which includes a light source board 4 and the above-mentioned optical element, and the surface of the optical element on which the light source cavity 111 is opened is in contact with the light source board 4, that is, the first plane 11 on the optical element body 1 is in contact with the light source board 4. An LED light-emitting unit corresponding to the light source cavity 111 is provided on the light source board 4, and the light source board 4 is connected to the heat sink 5. The LED light-emitting unit uses an LED device 7070 with high color rendering, high energy efficiency and long life, and other types of LED devices can also be used as needed. The optical element is arranged in a frame 6, and the frame 6 is connected to the heat sink 5. The thickness of the main body 1 of the optical element of this embodiment is basically the same as the thickness of the frame 6, and the arrangement of the light source cavity 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 lighting requirements while not irradiating the frame 6 as much as possible, thereby improving the utilization rate of light. The optical components enable the lamp to control light in multiple directions, so that light is emitted toward the road with high uniformity. This can meet the lighting needs of 2 to 5 lanes at two lamp pole heights of 10 and 12 meters. At the same time, the lamp is suitable for various arrangements of street lights without the need to replace the lamp.
[0081] It should be noted that the streetlights of this embodiment do not need to be tilted for road sections with less than three lanes. When used in four or five lanes, the streetlights can be adjusted to be vertically flipped to achieve wider illumination.
[0082] The street lamp of this embodiment was compared with a street lamp on the market with the same light source module (same luminous flux and color temperature) at the same installation height (the same installation angle was also used for less than three lanes) and under the same external environment. The simulation comparison data at the same installation height of 10 meters and 12 meters are shown in Tables 1 and 2 respectively:
[0083] Table 1 Simulation comparison data with an installation height of 10 meters
[0084]
[0085]
[0086] Table 2 Simulation comparison data of installation height of 12 meters
[0087]
[0088] The street lamps of this embodiment were applied to a four-lane road in different arrangements and illuminated at an installation height of 12 meters. The simulation data are shown in Table 3:
[0089] Table 3 Simulation data of different arrangements
[0090]
[0091]
[0092] At the same time, combined with the relevant values of the national standard CJJ45-2015 shown below, it can be seen through comparison that the road surface brightness, road surface illuminance and glare value of the street lamp lighting of this embodiment all meet the national standards for road and street lighting, and most of the data are better than the comparative example. The street lamp of this embodiment is suitable for various arrangements of street lamps and is suitable for various lanes and roads, achieving ideal lighting effects.
[0093] Table 3.3.1 Standard values for motorway lighting
[0094]
[0095] Conventional street lamps can often only be applied to one type of lane and can only be arranged in a single arrangement. For example, a conventional three-lane street lamp cannot be applied to a five-lane road. The street lamp of the present invention, by designing the optical element structure, accurately controls the light in multiple directions, so that the street lamp can achieve high light efficiency and good lighting uniformity. It can be applied to two lanes, three lanes, four lanes and even five lanes, and can be applied to at least two installation heights of 10 meters and 12 meters. There is no need to replace lamps for different lanes and roads. It has a wide range of applications, which makes up for the problem that conventional street lamps can only be applied to one type of lane and can only be arranged in a single arrangement. It can better meet the needs of various street lighting, not only achieving ideal road lighting effects, but also saving costs.
[0096] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.
Claims
1. An optical element, characterized in that: The device comprises a body, a first light emitting surface, and a second light emitting surface. A light source cavity is formed on a side of the body opposite to the second light emitting surface. The first light emitting surface is located on a cavity wall of the light source cavity. Both the first light emitting surface and the second light emitting surface are raised in a direction away from the light source cavity. Both the first light emitting surface and the second light emitting surface are arranged corresponding to the light source cavity. Light in the light source cavity is emitted through the first light emitting surface and the second light emitting surface in sequence. The line where the first light-emitting surface intersects the first cross-section is a first curve, and the line where the second light-emitting surface intersects the first cross-section is a second curve. The first cross-section passes through the light source cavity and is parallel to the Y-axis and the Z-axis directions. The vertical distance from the first curve to the second curve changes monotonically along the first curve, and on the same first cross-section, the curvature of the first curve in the first direction gradually increases, and the curvature of the second curve in the first direction gradually decreases.
2. The optical element according to claim 1, wherein A line where the first light emitting surface intersects the second cross section is a third curve, a line where the second light emitting surface intersects the second cross section is a fourth curve, and the second cross section passes through the light source cavity and is parallel to the X-axis and the Z-axis. The longest span of the first curve on the first light-emitting surface is greater than the longest span of the third curve on the first light-emitting surface; The longest span of the fourth curve on the second light-emitting surface is greater than the longest span of the second curve on the second light-emitting surface.
3. The optical element according to 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 symmetry plane; The distance from the third curve to the fourth curve first decreases and then increases from one end to the other end of the third curve.
4. The optical element according to claim 1, wherein The formula of the first curve is f(x)=p11×x 6 +p12×x 5 +p13×x 4 +p14×x 3 +p15×x 2 +p16×x+p17; Among them, 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 according to claim 1, wherein The formula of the second curve is f(x)=p21×x 6 +p22×x 5 +p23×x 4 +p24×x 3 +p25×x 2 +p26×x+p27; Among them, 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 according to claim 1, wherein The formula of the third curve is f(x)=p31×x 6 +p32×x 5 +p33×x 4 +p34×x 3 +p35×x 2 +p36×x+p37; Among them, P second curve 31 = (-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 according to claim 1, wherein The formula of the fourth curve is f(x)=p41×x 6 +p42×x 5 +p43×x 4 +p44×x 3 +p45×x 2 +p46×x+p47; Among them, 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 according to claim 1, wherein The main body includes a first plane and a second plane arranged in parallel, the light source cavity is arranged on the first plane, the second plane is connected to the second light-emitting surface, and the ratio of the distance from the second plane to the first plane to the distance from the second plane to the second light-emitting surface farthest from the first plane is 1:0.96~1.
25.
9. The optical element according to claim 1, wherein The light source cavity is arranged 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, the second light source cavity array includes a second light source cavity arranged in a linear array, the first light source cavity and the adjacent second light source cavity are staggered with each other in the X-axis direction, and the first light source cavity and the adjacent second light source cavity are staggered with each other in the Y-axis direction.
10. A street lamp, characterized in that: The optical element comprises a light source board and any one of claims 1 to 9, wherein the surface of the optical element where the light source cavity is formed is in contact with the light source board, and the light source board is provided with an LED light-emitting unit corresponding to the light source cavity.