| 摘要 |
A light integration rod is suitable for an optical projection apparatus to uniform the light beam provided by a light source of the optical projection apparatus. The light integration rod has an optical axis and includes a first integration portion. The first integration portion has a light incident cross-section perpendicular to the optical axis and located adjacent to the light source. The space enclosed by the first integration portion is composed of a prism-like space and at least an oblique-pyramid-like space protruded from the first integration portion and the cross-sections of the oblique-pyramid-like space perpendicular to the optical axis are gradually shrunk in the direction from the light incident cross-section to away from the light incident cross-section. In this way, the light integration rod has higher light-collecting efficiency and optical efficiency.
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