Fly-eye lenses and optical systems comprising same

Abstract

The invention discloses a fly-eye lens which comprises a substrate and a plurality of lens units, wherein the lens units are distributed on two opposite surfaces of the substrate and are inclined relative to the substrate. The invention further discloses another fly-eye lens which comprises a substrate and a plurality of lens units, wherein the lens units are distributed on one surface of the substrate and are inclined relative to the substrate. Besides, the invention further discloses two optical systems comprising the two fly-eye lenses respectively. Compared with the prior art, uniformity and strength of illumination can be effectively improved, and meanwhile, the fly-eye lenses and the optical systems can be suitable for occasions requiring the gradient effect of light.

Description

technical field [0001] The invention relates to an illuminating device in the field of illumination, in particular to a fly-eye lens and a fly-eye lens optical system including the fly-eye lens. Background technique [0002] Fly-eye lens, also known as fly-eye lens, is composed of a series of identical micro-lenses, which can convert the incident circular spot with uneven light intensity distribution into a uniform rectangular spot. Fly-eye lenses and their optical systems are widely used in the field of realizing large-area uniform illumination, such as projectors and solar simulators. [0003] The currently used fly eye lenses mainly include double-sided fly eye lenses and single-sided fly eye lenses. The difference between the double-sided fly-eye lens and the single-sided fly-eye lens is that two sets of micro-lenses are integrated on the same transparent substrate, so the reliability and stability are higher in practical applications, while the single-sided double-row ...

AI Technical Summary

Problems solved by technology

When the fly-eye lens with this structure is used in some special occasions, its illumination uniformity is much higher than that in general use occasions. In some cases, it is necessary to use two light sources and combine two sets of fly-eye lenses to perform , Figure 1-3 A schematic diagram of the illumination of the traditional fly-eye lens is given, which can obtain uniform light illumination on the illuminated surface. If two or more sets of perfunctory lens optical systems are required to be used together to increase the light intensity of the target surface, each fly-eye lens system Inclined setting is required, and the schematic diagram shows the situation where two sets of optical systems are used together. For each light source system, the optical path difference of light at different positions in the beam overlapping area is different, resulting in different light intensity, and the light intensity of each light source system The unevenness has not been specially designed, which leads to the unevenness of the illumination intensity in the overlapping area. Therefore, in this case, the traditional fly-eye lens has problems with the uniformity of illumination, and its uniformity obviously cannot meet the requirements of this occasion. And it also makes the light intensity affected

[0005] In addition, for some special lighting places, such as the stage, etc., it is required that the lighting can show a gradual effect, while the lighting of the traditional fly-eye lens presents the overall light. To achieve the gradual effect, you can only rely on changing the structure of the light source Or the setting position of the light source to achieve, resulting in higher cost

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