| 简介 |
PROBLEM TO BE SOLVED : To provide a light emitting device capable of improving wavelength conversion efficiency of a wavelength conversion portion.
SOLUTION : The light emitting device includes an LED chip 1, and the wavelength conversion portion 2 disposed on a light extraction surface side of the LED chip 1 to convert part of light emitted from the LED chip 1 into light having a wavelength longer than that of the LED chip 1. The wavelength conversion portion 2 is composed of a structure wherein a plurality of wavelength conversion element portions 21 are combined and arrayed, which use fluorescent glass as glass to which a rare earth element excited with the light emitted from the LED chip 1 to emit the light having the wavelength longer than that of the LED chip 1 is added. In the wavelength conversion portion 2, the wavelength conversion element portions 21 are optical fibers 120 each including the fluorescent glass as a core 121, and the respective optical fibers 120 are arrayed each having an optical-axis direction aligned with the optical axis direction of the LED chip 1.
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