CN201748335U - Symmetrical street light optical lens - Google Patents

Abstract

The utility model provides a symmetrical formula street lamp optical lens has a lens body, contains: a projection curved surface and a bottom surface. The projecting curved surface is composed of a plurality of curved surface points, the edge of the bottom surface and the edge of the reference surface are mutually connected to form the lens body, and the center of the bottom surface is concave inwards to form a containing chamber for placing the light-emitting diode. Furthermore, the symmetrical optical lens of the street lamp of the present invention can be enlarged or reduced in equal proportion without affecting the optical effect. Therefore, the symmetrical street lamp optical lens can enhance light intensity, uniformly irradiate the effect and present a rectangular illumination area, thoroughly and effectively irradiate the LED light source on the road surface, and can meet the environmental protection requirements of energy saving and carbon saving while enhancing the safety of driving at night and passers-by.

Description

Symmetrical street light optical lens

technical field

The utility model relates to a light-emitting diode lens, in particular to a symmetrical road light optical lens which utilizes the light-gathering principle to enhance the light intensity, uniformly illuminate the effect and present a type of rectangular lighting area.

Background technique

Compared with general traditional light sources, Light Emitting Diode (LED) has the advantages of low voltage, low power consumption, and long life. Therefore, LEDs have been widely used in various special related fields that require light sources in today's life. For example, it is used in the backlight module of the display, the light source of the indicator light, the general lighting equipment and so on. Among them, because LED has a particularly significant advantage in energy saving and power saving, its practicability is particularly important in the most commonly used lighting purposes. For example, the application of LED light sources to the lighting implementation of street lights at night is an example.

However, compared with traditional light sources, the light divergence angle of light-emitting diodes is smaller, so that when used for street lighting, the central brightness is too concentrated, which leads to a huge difference in brightness between the adjacent and far away parts of the street lamp, which cannot be effectively and evenly distributed. Provide road lighting. In this regard, it is tried to use the principle of secondary optics to change the optical properties projected by the LED, and to provide the best lighting state under various conditions of use. Taking street lamps on both sides as an example, the lighting requirements must at least be able to present a lighting effect in a rectangular area, so as to provide both parallel roads and perpendicular roads within its coverage. Therefore, how to effectively improve the projection intensity, projection range, and illumination uniformity of the LED light source is a subject that relevant practitioners in this field desire to improve.

In view of this, the author feels that it is not perfect and has exhausted his mind and painstaking research. Based on his accumulated experience in this industry for many years, he has successively proposed and approved the announcement on the current general height of street lamps and the ratio of length and width of the road surface. Patent No. M380486 of Taiwan Province of China filed in the case, utilizes the structural characteristics of a symmetrical lens, so that the LED light source can produce a symmetrical and uniformly bright irradiation area effect after passing through the lens. Here, the author further developed a symmetrical street light optical lens that can use the principle of light concentrating to enhance the light intensity, and can uniformly illuminate the effect and present a rectangular lighting area, completely effectively illuminating the LED light source on the road surface , while strengthening the safety of driving at night and using passers-by, it can also meet the environmental protection requirements of energy saving and carbon saving.

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a symmetrical road light optical lens that utilizes the principle of secondary optics to further change the optical characteristics of LEDs. In this way, it is used to enhance the intensity of light irradiation, uniform irradiation effect and present a special effect of a rectangular lighting area, so that while enhancing the safety of night driving and passers-by, it can also meet the environmental protection requirements of energy saving and carbon saving.

In order to achieve the above purpose, the utility model proposes a symmetrical road light optical lens, which has a lens body, including: a projected curved surface, which is composed of a plurality of curved surface points, wherein the edge of the projected curved surface forms a reference plane, and the reference plane It has a long axis and a short axis, the long axis is the X-axis direction, the short axis is the Y-axis direction, d is a unit coordinate length, and the intersection of the long axis and the short axis is the origin of the three-dimensional coordinates, where The multi-surface point is on the X-Z coordinate plane, and each point (x, z) is (0, 6.9), (1.32, 6.96), (2.92, 7.12), (4.03, 7.16), (5.32, 7.04), (7.18, 6.35), (8.31, 5.44), (9.32, 3.87), (9.73, 2.31), (9.79, 0.77), (9.80, 0); on the X-Y coordinate plane, each point (x, y ) is (0, 6.61), (1.72, 6.59), (3.82, 6.40), (6.07, 6.05), (8.17, 4.96), (8.91, 4.32), (9.62, 2.85), (9.80, 1.05), (9.78, 0); On the Y-Z coordinate plane, each point (y, z) is (0, 7.17), (1.34, 7.04), (2.70, 6.61), (3.88, 5.97), (4.94, 5.11 ), (6.01, 3.69), (6.56, 2.05), (6.42, 0); the distance from the multi-surface point to the X, Y, and Z axes has a relative error p, and -d/20≤p≤d/20 , and a bottom surface, the edge of which is connected to the edge of the reference surface to form the lens body, and the center of the bottom surface is concave to form an accommodating chamber, the lens body is based on the Y-Z plane, mirror-symmetric to the X-axis direction, and Based on the X-Z plane, the mirror is symmetrical to the Y-axis direction.

The proportional enlargement or reduction of the symmetrical road light optical lens structure is the main technical feature of the utility model to achieve its purpose. Wherein when the unit coordinate length d is 1mm, the relative error value p is -0.05mm≤p≤0.05mm. In order to strengthen the installation of the symmetrical streetlight optical lens on an LED substrate, at least one engaging portion may be included on the bottom surface for engaging and fixing relative to the LED substrate. Wherein the engaging part can be set as an L-shaped buckle, and the symmetrical streetlight optical lens and the LED substrate are engaged with each other by external force rotation.

The effect of the utility model is to use the aspherical wide illumination angle design of the symmetrical street light optical lens to make the light source of the light-emitting diode produce a refraction effect after passing through the symmetrical street light optical lens, and the illuminated area where the light is projected roughly corresponds to the long and short axis direction reference The surface forms a symmetrical lighting effect on both sides. Accordingly, the LED light source can be completely and effectively irradiated on the road surface, and when the LED lamp is used, the requirements of energy saving, carbon saving and environmental protection can be met, and the safety of driving at night and pedestrians can be enhanced.

Description of drawings

Fig. 1 is the three-dimensional exterior view of the utility model;

Fig. 2 is the side view of the utility model in the X-Z plane;

Fig. 3 is the upper view of the utility model on the X-Y plane;

Fig. 4 is the sectional view of the utility model in Y-Z plane;

Fig. 5 is a schematic diagram of the light path of the utility model in the X-Z plane;

Fig. 6 is a schematic diagram of the light path of the utility model in the Y-Z plane;

Fig. 7 is an iso-illumination distribution diagram of the utility model equipped with LEDs;

Fig. 8 is a light distribution curve diagram of the utility model equipped with LEDs;

Fig. 9 is a three-dimensional appearance view of the clamping part of the utility model.

Explanation of reference signs: 1-lens body; 10-projection curved surface; 102-surface point; 104-reference plane; 106-major axis; 108-short axis; 12-bottom surface; .

Detailed ways

In order to enable your examiner to clearly understand the content of this utility model, the following descriptions are used to match the drawings, please refer to them.

Please refer to Fig. 1, Fig. 2, Fig. 3, and Fig. 4, which are respectively the three-dimensional appearance diagram of the utility model, the side view of the utility model on the X-Z plane, the top view on the X-Y plane and the cross-sectional view on the Y-Z plane. As can be seen from the figure, the utility model provides a symmetrical road light optical lens, which has a lens body 1 including: a projection curved surface 10 and a bottom surface 12 . Wherein the projection curved surface 10 is composed of a plurality of curved surface points 102 . Utilize the geometric principle, the basic concept of forming a line from a point, and a surface from a line, list the multi-curved surface points 102 on the projected surface 10, thereby further defining the curve and the curved surface, and the number of given multi-curved surface points 102 It will also determine the smoothness of the projected curved surface 10 . Since there are many ways to use the multi-surface points 102 to create curves and surfaces in engineering, they will not be described in detail here. The concept of smooth connection is mainly used to ensure that the curves are connected at a given surface point 102, so that the tangent line and the curvature of the curve are continuous, and then the projection surface 10 is constructed.

Here, the symmetrical streetlight optical lens provided by the present invention uses three-dimensional coordinates to list the corresponding positions of the curved surface points 102 in space. Wherein the edge of the projection curved surface 10 forms a reference plane 104, and the reference plane 104 has a major axis 106 and a minor axis 108, the major axis 106 is the X-axis direction, the minor axis 108 is the Y-axis direction, and d is a Unit coordinate length, the intersection of the major axis 106 and the minor axis 108 is the origin of three-dimensional coordinates, wherein the curved surface points 102 are on the X-Z coordinate plane, and each point (x, z) is (0, 6.9), (1.32, 6.96), (2.92, 7.12), (4.03, 7.16), (5.32, 7.04), (7.18, 6.35), (8.31, 5.44), (9.32, 3.87), (9.73, 2.31), (9.79 , 0.77), (9.80, 0); on the X-Y coordinate plane, each point (x, y) is (0, 6.61), (1.72, 6.59), (3.82, 6.40), (6.07, 6.05), (8.17, 4.96), (8.91, 4.32), (9.62, 2.85), (9.80, 1.05), (9.78, 0); on the Y-Z coordinate plane, each point (y, z) is (0, 7.17 ), (1.34, 7.04), (2.70, 6.61), (3.88, 5.97), (4.94, 5.11), (6.01, 3.69), (6.56, 2.05), (6.42, 0). Therefore, the distances from the surface points 102 to the X, Y, and Z axes are obtained by multiplying the corresponding (x, y, z) coordinates by the unit coordinate length d, for example (xd, yd, zd).

In addition, the distances from the curved surface points 102 to the X, Y, and Z axes can also have a relative error p, and -d/20≦p≦d/20. Therefore, within the relative error range, it is also the scope of rights claimed by the utility model. The edge of the bottom surface 12 is connected with the edge of the reference surface 104 to form the lens body 1 , and the center of the bottom surface 12 is recessed to form an accommodating chamber 122 for accommodating LEDs. The lens body 1 is based on the Y-Z plane, mirror-symmetric to the X-axis direction, and based on the X-Z plane, mirror-symmetric to the Y-axis direction. In this way, the overall structure of the symmetrical road light optical lens of the present invention is constituted. At the same time, the symmetrical road light optical lens provided by the utility model can be enlarged or reduced in equal proportions without hindering the purpose and optical effect of the utility model. In the same way, when the symmetrical streetlight optical lens is scaled up in equal proportions, the relative error P value also increases accordingly. As an example, when the unit coordinate length d is 1mm, the relative error value p is -0.05mm≤p≤+0.05mm.

Please refer to FIG. 5 and FIG. 6 together, which are schematic diagrams of light paths on the X-Z plane and light paths on the Y-Z plane of the present invention, respectively. In practice, the LED is mainly placed in the accommodation chamber 122, and then according to the principle of secondary optics, the LED light source penetrates the lens body 1 and uses refraction to deflect the light and project it on the area to be irradiated. Figure 5 shows the appearance of the light projection area relative to the long axis direction; Figure 6 shows the appearance of the light projection area relative to the short axis direction.

Please refer to Fig. 7 and Fig. 8 together, which are respectively the iso-illumination distribution diagram and the light distribution curve diagram of the utility model equipped with LEDs. The units of X-axis and Y-axis coordinates shown on the isometric distribution diagram are millimeters (mm), and the left side is the illuminance meter, and its unit is lux (1ux). The light distribution curve is usually marked with polar coordinates to represent the luminous intensity distribution of the lamp, and then measure the luminous intensity distribution of the lamp at various angles. As shown in the figure, the radial coordinate on the periphery of the light distribution curve is an angle, and the unit is degree (°), and the axial coordinate is luminous intensity, and the unit is (candle power) cd. And when the unit coordinate length d is 1mm, the long axis of the symmetrical street light optical lens is about 20mm, the short axis is about 14mm, and the irradiation range in the long axis direction can reach about 6400mm, and the short axis direction can reach about 6400mm. At the same time, because the light source has directionality after passing through the lens of the utility model, it presents different luminosity correspondingly at different angles. As shown in the figure, La is the light distribution curve in the major axis direction of the illumination area in FIG. 7 , and Lb is the light distribution curve in the minor axis direction.

Please refer to FIG. 9 again, which is a three-dimensional appearance view of the engaging part of the utility model. As can be seen from the figure, the symmetrical road light optical lens can further include at least one engaging portion 2 disposed on the bottom surface 12 for engaging and fixing with respect to an LED substrate. In this way, in the rear-end installation, the symmetrical street light optical lens can be quickly installed or replaced without adhesive glue and glue unloading actions. The engaging portion 2 can be set as an L-shaped buckle, and then the symmetrical road light optical lens is fixed on the LED substrate in a screwed manner.

The effect of the utility model is to use the aspheric wide illumination angle design of the symmetrical street light optical lens to make the light source of the light-emitting diode produce a refraction effect after passing through the symmetrical street light optical lens, so that the illuminated area projected by the light roughly corresponds to the direction of the long and short axes The base plane forms a symmetrical lighting effect on both sides. According to this, the LED light source can be effectively irradiated on the road surface completely, and when the LED lamps are used to meet the requirements of energy saving, carbon saving and environmental protection, it can also enhance the safety of driving at night and passers-by.

What is described above is only a preferred embodiment of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, equivalent or easy changes made by those skilled in the art will not depart from the scope of the present utility model. The equivalent changes and modifications made under the spirit and scope should all be covered within the patent scope of the present utility model.

Claims (4)

1. A symmetrical road light optical lens is characterized in that it has a lens body, and the lens body includes: A projected curved surface is composed of a plurality of surface points, wherein the edge of the projected curved surface forms a datum plane, and the datum plane has a long axis and a short axis, the long axis is the X-axis direction, and the short axis is the Y-axis direction, d is a unit coordinate length, the intersection of the major axis and the minor axis is the origin of three-dimensional coordinates, where the multi-surface point is on the X-Z coordinate plane, and each point (x, z) is (0, 6.9 ), (1.32, 6.96), (2.92, 7.12), (4.03, 7.16), (5.32, 7.04), (7.18, 6.35), (8.31, 5.44), (9.32, 3.87), (9.73, 2.31), (9.79, 0.77), (9.80, 0); on the X-Y coordinate plane, each point (x, y) is (0, 6.61), (1.72, 6.59), (3.82, 6.40), (6.07, 6.05 ), (8.17, 4.96), (8.91, 4.32), (9.62, 2.85), (9.80, 1.05), (9.78, 0); on the Y-Z coordinate plane, each point (y, z) is (0 , 7.17), (1.34, 7.04), (2.70, 6.61), (3.88, 5.97), (4.94, 5.11), (6.01, 3.69), (6.56, 2.05), (6.42, 0); the multi-surface point The distances to the X, Y, and Z axes respectively have a relative error p, and -d/20≤p≤d/20, and A bottom surface, the edge of which is connected to the edge of the reference surface to form the lens body, and the center of the bottom surface is concave to form a housing chamber, the lens body is based on the Y-Z plane, mirror-symmetric to the X-axis direction, and X-Z Based on the surface, the mirror is symmetrical to the Y-axis direction. 2 . The symmetrical street light optical lens according to claim 1 , wherein the unit coordinate length d is 1 mm, and the relative error value p is -0.05 mm≤p≤0.05 mm. 3. The symmetrical streetlight optical lens according to claim 1 or 2, further comprising: at least one engaging portion disposed on the bottom surface for engaging and fixing relative to an LED substrate. 4. The symmetrical streetlight optical lens as claimed in claim 3, wherein the engaging portion is an L-shaped buckle.

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