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Large-angle secondary light-distribution lens of LED streetlamp and manufacturing method thereof

A technology of LED street light and secondary light distribution

Active Publication Date: 2012-01-25
SHENZHEN SPARK PHOTOELECTRICITY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in order to solve the problem of glare, the existing lens lacks light-cutting manufacturing, and the large-angle light needs to be refracted to a smaller angle under the action of the lens to meet the road lighting requirements

Method used

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  • Large-angle secondary light-distribution lens of LED streetlamp and manufacturing method thereof
  • Large-angle secondary light-distribution lens of LED streetlamp and manufacturing method thereof
  • Large-angle secondary light-distribution lens of LED streetlamp and manufacturing method thereof

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Embodiment Construction

[0056] Such as Figure 1-4 As shown, the present invention relates to a secondary light distribution lens for LED street lamps, which includes a first light distribution lens 4 and a second light distribution lens wrapped around it, and the first light distribution lens 4 is hemispherical or elliptical As for the spherical surface, when it forms a hemisphere, the radius of curvature of the first light distribution lens 4 is 3.4 mm, and when it forms an elliptical aspheric surface, the minor axis of the ellipse also has the best radius of curvature of 3.4 mm. The second light distribution lens is an asymmetric curved surface in the shape of a peanut shell, which is composed of a main curved surface 11 and glare-eliminating curved surfaces 12 and 13 connected at both ends, wherein the main curved surface 11 is located within the range of ±71° from the optical axis in the vertical direction, and the LED beam It is made into a uniform rectangular spot distributed along the horizon...

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Abstract

The invention provides a large-angle secondary light-distribution lens of LED streetlamp and a manufacturing method thereof. The secondary light-distribution lens comprises a first light-distribution lens and a second light-distribution lens, wherein the first light-distribution lens is a semi-spherical surface or an elliptical non-spherical surface, while the second light-distribution lens is a peanut shell-shaped asymmetrical curved surface and is formed by a main curved surface and a glare elimination curved surface with two ends jointed; according to the actual streetlamp illumination demand, a matching method of controlling network node normal vectors through the curved surface is utilized to obtain the normal vectors of each point on the two curved surfaces; and accordance relationship of an included angle between corresponding incidence rays in x and y directions and a vertical optical axis and an included angle between emergent rays passing through the two curved surface is combined to obtain the grid line profiles of the two surfaces, so as to form a whole free curved surface. The obtained secondary light-distribution lens can be used for distributing an LED beam into an even rectangular facula which is distributed in 0-+ / -71degrees along horizontal X direction and in 0-+ / -30 degrees along Y direction, and the horizontal glare is effectively eliminated to accord with the road surface illumination demand.

Description

【Technical field】 [0001] The invention relates to an optical lens for LED lights, in particular to a large-angle secondary light distribution lens for LED street lights and a manufacturing method thereof. 【Background technique】 [0002] LED (Light Emitting Diode) is known as the green lighting product of the 21st century. Due to its long life, short start-up time, firm structure, energy saving and environmental protection, and small size, with the continuous improvement of LED efficiency and the decline in price, LED The field of application is also becoming wider and wider. In recent years, LED road lighting technology has developed rapidly. Good road lighting requires the light distribution of street lamps to be a rectangular spot, which concentrates the light energy on the road as much as possible, and the light pollution outside the road is as small as possible, and it is required not to cause glare to vehicles in the distance. Since the radiation angle distribution of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00F21V5/04F21W131/103F21Y101/02
CPCF21Y2101/02F21W2131/103F21V5/04F21Y2115/10
Inventor 蒋金波杜雪
Owner SHENZHEN SPARK PHOTOELECTRICITY TECH
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