| 摘要 |
A exemplary light converging device includes a support, a supporting plate, a reflective Fresnel lens and a cooling assembly. The supporting plate is rotatably mounted on the support. The reflective Fresnel lens is fixedly mounted on the supporting plate. The cooling assembly is positioned between the reflective Fresnel lens and the supporting plate. The cooling assembly is thermally coupled to the reflective Fresnel lens and configured for cooling the reflective Fresnel lens.
|
