Secondary optical lens of LED street lamp

Abstract

The invention relates to a secondary optical lens of an LED street lamp, which consists of inner and lower curved surfaces. The LED lamp is positioned in a groove formed by the inner curved surface of the lens. The secondary optical lens is characterized in that the outer curved surface of the lens is a curved surface formed by cutting a torus and an elliptical cylinder, the upper surface of the curved surface is an elliptical spherical surface, the cross section is a fan-shaped plane, the side inclined plane is an oblique arc curved surface, and the bottom surface is a plane; and the inner curved surface is formed by combining an oblique plane and an elliptical groove. All surfaces of the optical lens are combined by simple curved surfaces, so engineering molding is easy to realize; the integral curved surface is convex and has no concave surface combination, so the secondary optical lens can well reduce the influence of environmental dust on the lens effect; and the secondary optical lens has obvious secondary light distribution effect on the LED, increases the light efficiency utilization rate of the street lamp, improves the distribution uniformity of the light intensity and can reduce the influence of practical engineering installation on the light efficiency.

Description

technical field [0001] The invention relates to light-emitting diode (LED) lighting technology, in particular to a secondary optical lens for LED street lamps with simple outer curved surface and strong applicability. Background technique [0002] LED has the advantages of energy saving and environmental protection, and has entered various fields as a lighting source. Due to the advantages of low energy consumption, long life, and no secondary pollution, LED street lamps have great potential for development. At present, there are many LED street lamp lighting products on the market, but most of them have limited lighting range and low light efficiency utilization. , Uneven distribution of light intensity on the road surface and other shortcomings. Therefore, the secondary optical treatment of LED street lamps is of great significance to improve the performance of street lamps. At present, the secondary optical treatment methods for LED street lamps mainly focus on adding a...

AI Technical Summary

Problems solved by technology

At present, the secondary optical treatment methods for LED street lamps mainly focus on adding a concentrating reflector and a secondary light distribution lens to the LED. However, due to the Lambertian distribution of LED light intensity, when using a concentrating reflector, the vertical position of the street lamp A stronger spot will be formed, and a higher uniformity of light intensity distribution cannot be obtained

However, the current secondary light distribution lenses are mainly designed with outer curved surfaces. Due to the requirement of rectangular light spots on the road surface, the outer curved surface structure of most lenses is relatively complicated, and there are concave curved surface joints that are easy to collect dust and other tiny particles. In the actual use process It is easy to affect the light effect

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