LIGHT-EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a light-emitting device capable of efficiently suppressing temperature rise of a phosphor layer.SOLUTION: A light-emitting device includes a cylindrical phosphor layer 2, a rotary mechanism rotating the cylindrical phosphor layer 2 in a circumferential direction A, and a light source 4 irradiating the phosphor layer 2 with excitation light 10.SELECTED DRAWING: Figure 1