Phosphor wheel comprising a heat dissipating member having a plurality of fins

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 the first principal surface and rotatable 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 first principal surface, the projecting portion including a contact surface that contacts the first principal surface, an entirety of the projecting portion being located on a first principal surface side of the substrate;
• 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;
• and
• a bent end portion having an obtuse bending angle and provided as a result of an outer edge portion of the heat dissipating member being bent in a same orientation as an orientation in which the plurality of fins are cut and raised as viewed from the heat dissipating member,
• the plurality of fins are each cut and raised toward the first principal surface, and
• the projecting portion contacts the substrate via the contact surface to secure a certain distance between the substrate and the peripheral region of the heat dissipating member and conduct heat in the substrate to the peripheral region of the heat dissipating member.