LED lens designing method capable of achieving hexagon uniform illumination

Abstract

The invention relates to an LED lens designing method capable of achieving hexagon uniform illumination. Two lenses are successively arranged to form a coaxial optical system, the light from a light source passes through the front focal lens to form parallel beam which is then used as the emergent light of the back fly eye lens and finally the hexagon illumination light spots are formed on the object surface. The material of the lenses is acrylic material which belongs to the plastic material, and because the structure of the fly eye lens is complicated, the plastic material can increase the production efficiency, the shape of the lens can be formed through injection molding and extrusion molding, the light transmittance is high (when the thickness is 3 mm, the transmittance rate is about 93%), and the cost is low. The construction method is simple, the illumination is uniform, and the centrosymmetric hexagon distribution of the light spots can be achieved.

Description

technical field [0001] The invention relates to a design of an optical element, in particular to a design method of an LED lens for realizing uniform illumination of a hexagon. Background technique [0002] As the advantages of the LED light source are increasingly discovered by people, it has been widely used in the field of lighting. While people are pursuing efficient lighting, they also hope to use LED light sources to achieve the required landscape lighting effects. For example, the five rings of the Olympic Games, the annular solar eclipse, etc. are distributed in a circular shape or the shape of a rectangular spot that meets the requirements of road lighting. In order to obtain the above-mentioned spot shape, if the optical lens is not used and the light source is directly irradiated, multiple LEDs are required to be responsible for different parts of the irradiation area with a specific spot shape. Uniform illumination requirements in the illuminated area. Existin...

AI Technical Summary

Problems solved by technology

In order to obtain the above-mentioned spot shape, if the optical lens is not used and the light source is directly irradiated, multiple LEDs are required to be responsible for different parts of the irradiation area with a specific spot shape. Requirements for uniform illumination of the illuminated area

Existing LED light source lighting systems mostly use aspheric lens systems or reflector components to achieve lighting beam shaping, which cannot achieve high-quality and uniform lighting, and at the same time cannot give full play to the specific characteristics of LED lighting.

[0003] Glass materials are used in lens processing in the prior art, but they are bulky, heavy, single-shaped, fragile, low in production efficiency, and high in cost, so it is difficult to popularize them in the short term.

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