Lens array and lighting module

Abstract

The invention relates to a lens array, which comprises a first lens group, a second lens group and a symmetry surface. The first lens group comprises a plurality of rows of first lenses provided with first optical curved surfaces, and the second lens group comprises a plurality of rows of second lenses provided with second optical curved surfaces. Each first lens and each second lens extend alonga first axis. The second lenses are arranged on both sides of the first lens group along a second axis perpendicular to the first axis, an optical axis of each second optical curved surface is perpendicular to the first axis and the second axis, and an optical axis of each first optical curved surface is perpendicular to the first axis and has an included angle which is more than 0 DEG and less than 6 DEG with the optical axis of each second optical curved surface.. The symmetry surface is perpendicular to the second axis and passes through the first lens group, and a normal vector of the first optical curved surfaces on the optical axis is far away from the symmetry surface.

Description

Lens array and lighting module technical field The invention relates to a projection device, and in particular to a lens array and an illumination module using the same. Background technique Fig. 1 is a schematic diagram of a conventional lighting module. Referring to FIG. 1 , the lighting module 100 has a light source 110 , a first lens array 120 , a second lens array 130 and a polarization conversion system 140 . The light source 110 can emit an illumination beam L10, and the first lens array 120 and the second lens array 130 are sequentially arranged on the optical path of the illumination beam L10. The first lens array 120 and the second lens array 130 make the illumination beam L10 uniform, and the polarization conversion system 140 is arranged on the optical path of the illumination beam L10 from the second lens array 130, and makes the illumination beam L10 form a polarized polarized beam L20. The polarization conversion system 140 has a plurality of absorption ...

AI Technical Summary

Problems solved by technology

In this way, the illuminating light beam L10 passing through the first lens array 120 and the second lens array 130 will be discontinuous

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