Illumination device including a wavelength converter

摘要

An illumination device includes an excitation light source which emits excitation light, a wavelength converter which generates fluorescent light having a wavelength different from that of the excitation light through the excitation of the excitation light and a light path-splitting member including a first filter and a second filter arranged to alternately come across a light path of the excitation light, wherein the first filter reflects one of the excitation light and the fluorescent light and transmits the other of the excitation light and the fluorescent light, the second filter transmits light reflected by the first filter and reflects light transmitted through the first filter, and the wavelength converter is disposed in a reflection light path or a transmission light path of the excitation light.

主权项

1. An illumination device, comprising:
an excitation light source which emits excitation light; a wavelength converter which generates fluorescent light having a wavelength different from that of the excitation light through the excitation of the excitation light; and a light path-splitting member including a first filter and a second filter arranged to alternately come across a light path of the excitation light, wherein the first filter reflects one of the excitation light and the fluorescent light and transmits the other of the excitation light and the fluorescent light, and the second filter transmits light reflected by the first filter and reflects light transmitted through the first filter; the wavelength converter is disposed in a reflection light path or a transmission light path of the excitation light; the excitation light source emits blue light as the excitation light; the wavelength converter includes phosphor generating the fluorescent light having green color by the excitation of the blue light; the first filter in the light path-splitting member reflects the blue light and transmits the fluorescent light and the second filter transmits the blue light; and the wavelength converter is disposed in the reflection light path of the first filter which reflects the blue light.