LED lens generating square light spot

Abstract

The invention discloses a lens and optical system generating a square light spot, and the lens and optical system are used in front of an LED point light source chip. The lens is provided with a front surface, a rear surface and a side face, wherein the front surface is a partial spherical surface with certain curvature, the side face is a cylindrical surface, and the rear surface is in an inwards concave non-spherical-surface shape. The LED lens is reasonable in structural design, good in light condensation effect and convenient to machine, and can save machining cost, form the square light spot on an irradiation face to make illumination evener and effectively improve the use ratio of light.

Description

technical field [0001] The invention belongs to the technical field of LEDs, in particular to an LED lens for generating square light spots. Background technique [0002] LED manufacturing technology continues to improve. Compared with traditional light sources, LEDs are small in size, high in luminous efficiency, good in monochromaticity, low in power consumption, long in service life, safe and reliable, and low in heat, so they are more and more widely used. , In many applications, it can even be treated as an electric light source, which brings great convenience to the optical design of the lamp, and at the same time, avoids the light source blocking and absorption effects that occur in large-size traditional light source lamps. At present, the luminous efficiency of high-power white LEDs has reached 1001m / w, and the luminous efficacy of stable products is also above 901m / w. This light effect makes it possible for LEDs to enter general lighting, especially in road lighti...

AI Technical Summary

Problems solved by technology

However, as far as the current LED street lights and LED tunnel lights are concerned, the light beams generated by the LEDs are forward directional, and there are still defects such as a small range of light and uneven distribution of light intensity on the road surface, so to a certain extent The promotion and application of LED street lamps and LED tunnel lamps are limited. In order to effectively control the LED beam to improve the uniformity of the mask and increase the luminous flux, it is necessary to use auxiliary optical devices for secondary light distribution.

At present, light cups and reflective disks are mostly used in the secondary light distribution of LEDs to improve the uniformity of LED illumination. However, the existing technical solutions make the beams cross-reflect or refract multiple times, and the luminous flux is attenuated to a considerable extent. Affect the light performance of LED

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