| CPC G02B 26/008 (2013.01) [F21V 29/502 (2015.01)] | 7 Claims |
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1. A phosphor wheel comprising:
a substrate including a first principal surface and a second principal surface on opposite sides of the substrate;
a phosphor layer provided on the first principal surface; and
a heat dissipating member disposed facing one of the first principal surface or the second principal surface and rotated along with the substrate, the heat dissipating member being a plate member,
wherein the heat dissipating member includes:
a projecting portion provided at a central portion of the heat dissipating member to project toward the one of the first principal surface or the second principal surface, the projecting portion including (i) a contact surface that contacts the one of the first principal surface or the second principal surface and (ii) a peripheral wall to which the contact surface serves as a bottom surface; and
a plurality of fins provided by cutting and raising a plurality of regions in a peripheral region of the heat dissipating member excluding the central portion,
the projecting portion includes, in the peripheral wall, a plurality of through-holes provided for ventilation, and
the projecting portion contacts the substrate via the contact surface to secure a certain distance between the substrate and the heat dissipating member and conduct heat in the substrate to the peripheral region of the heat dissipating member.
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