| 摘要 |
A light source with a function of condensing light comprises a radiating area, a penetrable layer, and a condensing layer. The penetrable layer comprises a first inner tube and a first outer tube, and any cross section, which is vertical to the central axis of the light source, of the first inner tube and the first outer tube has the same first cross-section curvature. The condensing layer couples to the penetrable layer and together they cover the radiating area inside the light source. Any cross section, which is vertical to the central axis, of the second inner tube of the condensing layer has the first cross-section curvature; the cross section, which is vertical to the central axis, of the second outer tube of the condensing layer has at least a second cross-section curvature, and the second cross-section curvature is greater than the first cross-section curvature.
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