| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight heat sink which can be manufactured at low material cost and processing cost, and is adaptable to a complicated fin shape, while allowing a surface area to be easily increased to improve cooling performance and heat radiation efficiently.SOLUTION: A first heat sink member 11A formed of a platy support part 11b fixed to a base end-side face 22b of a light source support pedestal and a plurality of platy fins 11a formed in a protruded shape at a base end side of the support part 11b, and a second heat sink 11B formed of platy support parts 11b similar to the heat sink member 11A and smaller than that and a plurality of platy fins 11, are fixed concentrically while axially stacking the support parts 11b, on a base-end side face in the support part 11b of the heat sink member 11A. |
