| 摘要 |
An illumination mechanism is disclosed which has a high efficiency of illumination and which is compact. The mechanism includes a reflector, a light source, a first lens array with plural lens cells arranged in rows in a direction perpendicular to an optical axis thereof in which each lens cell is similar in shape to a liquid crystal panel, and a second lens array similar in construction to the first lens array, the lens arrays being disposed along the optical axis. The reflector is divided radially about the optical axis, and has a plurality of partial reflecting surfaces. Each partial reflecting surface is part of a rotation paraboloid with its center being on the optical axis. The light source is placed at a focal position of each partial reflecting surface. The focal length of each partial reflecting surface is generally inversely proportional to a distance from an aperture center of the lens cell of the second lens array to an aperture edge thereof in which the distance is parallel to the direction in which the optical axis and each partial reflecting surface are connected together perpendicularly to the optical axis.
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