Compatible street lamp lens

Abstract

The invention discloses a compatible street lamp lens. The compatible street lamp lens comprises a lens body which is composed of a cardinal plane, a light incident face and a light-emitting face together. The cardinal plane comprises a first cardinal plane body and a second cardinal plane body, the first cardinal plane body is planar and the second cardinal plane body is a hook face perpendicular to the first cardinal plane body. The light incident face is a concave face which is concaved from the first cardinal plane body to the interior of the lens body. The light-emitting face is formed to be the convex outer surface of the lens body and comprises a first light-emitting face body and a second light-emitting face body which are in smooth transition. The first light-emitting face body is connected with the second light-emitting face body through a fracture face. The fracture face is provided with an outer side curve and an inner side curve, the outer side curve is located in the first light-emitting face body, and the inner side curve is located in the second light-emitting face body. Light spots produced through the compatible street lamp lens rapidly and obviously deflect inwards in the positions corresponding to the fracture face, and quasi-hexagonal light spot shapes are formed on a road surface, so that the illumination range of a street lamp in the extending direction of a road is wide, the illumination effect is good and the purpose for using the street lamp on a cement road and an asphalt road in a compatible mode is achieved.

Description

technical field [0001] The invention relates to the technical field of a light source refractor of an illuminating device, in particular to a lens installed on a street lamp. Background technique [0002] The light spot projected by the existing lens is circular, and the light intensity difference between the center and the periphery is large; for some occasions that require a large range of lighting in one direction and a small range of lighting in another direction, such as roads Lighting requires a wide range of illumination in the direction of the road extension, good lighting effects, and a large angle requirement; however, a wide range of lighting is not required in the direction perpendicular to the road, otherwise, it will waste electricity and cause light pollution to the surrounding environment. However, for the existing circular lens LEDs, the light intensity requirements can only be achieved by installing more lamps in the direction of the road extension and supe...

AI Technical Summary

Problems solved by technology

[0002] The light spot projected by the existing lens is circular, and the light intensity difference between the center and the periphery is large; for some occasions that require a large range of lighting in one direction and a small range of lighting in another direction, such as roads Lighting requires a wide range of illumination in the direction of road extension, good lighting effects, and a large angle requirement; however, a wide range of lighting is not required in the direction perpendicular to the road, otherwise, it will not only waste electric energy, but also cause light pollution to the surrounding environment

However, for the existing circular lens LEDs, the light intensity requirements can only be achieved by installing more lamps in the direction of the road extension and superimposing the light spots of adjacent lamps. Even so, it is difficult to avoid the lighting of the "rib road" As a result, the illuminance directly under the lamp is high, and the illuminance in other areas is low, resulting in low average illuminance and poor uniformity of the road surface. This uneven lighting directly affects driving safety.

[0003] At present, in the design of street lamp lens, it is usually a single lens design based on asphalt pavement or cement pavement, and because the brightness coefficient and change trend of asphalt pavement and cement pavement are quite different, the street lamps on different types of roads are compatible. sexually deficient

In order to achieve good brightness and uniform lighting effect, the light on the asphalt pavement needs to have higher illuminance near the lamp, while the concrete pavement requires higher illuminance in the middle of the lamp. The spot shape of the existing lens is fan-shaped, triangle or butterfly No type of light spot can achieve high brightness uniformity on both types of road surfaces. Different optical lenses need to be designed to meet different types of road surfaces, which greatly increases the cost of street lights.

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