LED illuminating system based on refractive-diffractive hybrid

Abstract

The invention relates to an LED illuminating system based on refractive-diffractive hybrid. By adoption of the LED illuminating system based on the refractive-diffractive hybrid, the problems that an existing illuminating system is complex in design, large in size, nonuniform in illumination and low in light energy utilization rate are solved. The LED illuminating system based on the refractive-diffractive hybrid comprises a high-thermal-conductivity curved-surface substrate 1, an LED chip 2, a high-refractivity convex lens 3 and a diffractive optical element 4. Light emitted by the LED chip is refracted and focused through the convex lens, part of the light is reflected through the curved-surface substrate, so that an approximate Lambertian light source surface is formed in front of the diffractive optical element, and uniform illumination or special illumination is achieved on an illuminating surface through the diffractive optical element. The LED illuminating system based on the refractive-diffractive hybrid has the characteristics of being high in illuminating efficiency, simple and flexible in design, light and compact in structure, and easy to machine and manufacture.

Description

technical field [0001] The invention relates to the lighting field, in particular to an LED lighting system based on refraction-diffraction mixing. Background technique [0002] Compared with traditional light sources, LED chip light sources have outstanding advantages such as high energy saving, long life, environmental protection, small size, and high brightness. With the continuous improvement of the luminous flux of a single LED, its application in the field of lighting is becoming more and more popular. [0003] Due to the differences between LEDs and traditional light sources, the optical design and structure of traditional lighting systems cannot give full play to the advantages of LED light sources. [0004] Therefore, in order to improve the performance of the entire lighting system, it is necessary to carry out primary and secondary optical design for the LED chip. [0005] At present, the primary optical design generally involves bonding the primary lens and the...

AI Technical Summary

Problems solved by technology

After passing through the lens once, although the light emitted by the LED chip can achieve a certain degree of convergence, it cannot make full use of the light energy. Therefore, when using the LED light source, it is often equipped with a reflective cup

Even so, uniform illumination cannot be achieved on the illuminating surface, so secondary optical design is required again

The secondary optical design achieves uniform illumination on the illuminating surface to a certain extent, but this sacrifices the advantages of LED in terms of size and brightness

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