Lighting system based on reflective compound eye

Abstract

The lighting system based on reflective compound eye includes light source, the first compound eye array and the second compound array. The first compound eye array has small central hole for setting the light source, the second compound array has opening in the center with planar reflector set outside the opening, and below the planar reflector there are successively collecting mirror, stripe polarizing beam splitter array, half-length plate and lighted image source. The present invention has the advantages of compact reflective compound eye structure, reduced lighting system size, controllable light outgoing angle and raised light distribution homogeneity, and is especially suitable for small lighting system and great divergence angle light source.

Description

technical field [0001] The invention relates to a lighting system based on reflective compound eyes. Background technique [0002] The design of the optical integration system has a crucial impact on improving the energy utilization rate, illumination brightness, and illumination uniformity of the illumination system. At present, the optical integrating system widely used in the lighting system mostly adopts the transmission type compound eye or integrating square rod structure. The transmissive compound eye has high efficiency, but its structure is complicated, and there are disadvantages such as eccentricity and dead zone, and its long structure is not suitable for small lighting systems; the integral square rod has a simple structure and low cost, but its efficiency is low. Uniformity, the number of reflections is greater than 3, and the square rod is generally longer, which increases the length of the lighting system. At the same time, the outgoing angle of the integral...

AI Technical Summary

Problems solved by technology

The transmissive compound eye has high efficiency, but its structure is complicated, and there are disadvantages such as eccentricity and dead zone, and its long structure is not suitable for small lighting systems; the integral square rod has a simple structure and low cost, but its efficiency is low. Uniformity, the number of reflections is greater than 3, and the square rod is generally longer, which increases the length of the lighting system. At the same time, the outgoing angle of the integral square rod is equal to the incident angle, which affects the etendue of the lighting system

[0003] Recently, an article proposed a high-brightness light-emitting diode collimating mirror, which is a system composed of a series of reflective surfaces and refracting surfaces. It is small in size and has good collimation efficiency, but its illumination image source It is circular or elliptical, and the light distribution is uneven. It can only be used for lighting with low requirements, and is not suitable for the lighting system of projection display.

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