| 摘要 |
A projection system includes an illumination apparatus, an imaging apparatus, and a projection lens. The illumination apparatus includes a light source, a lens array, light collecting elements, and a converging lens array. The light source provides a parallel light beam. The light collecting elements are disposed at a side of the lens array, and arranged in an array. Each light collecting element has a second end facing the light source, a first end corresponding to the second end, and at least one side connected between the first end and the second end. Each light collecting element shrinks from its second end to its first end. The side of the light collecting element has at least one reflective surface. The converging lens array scales the light beam exiting the light collecting element. The imaging apparatus forms an image from the light beam. The projection lens projects the image to a surface.
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