Patent ID: 8955985
Filing Date: 2015-02-17
Classification: F21V,G03B,H04N

Abstract:
1. A lighting device, comprising: an excitation light source unit that supplies excitation light; a phosphor unit that emits fluorescent light by excitation caused by excitation light supplied from said excitation light source unit; a collimator lens that converts fluorescent light emitted from said phosphor unit to parallel luminous flux; a first solid-state light source that supplies first light whose peak wavelength is set in a first wavelength band in which wavelength is longer than the wavelength of fluorescent light emitted from said phosphor unit; a second solid-state light source that supplies second light whose peak wavelength is set in a second wavelength band that is set in a range of bands other than said first wavelength band; a dichroic mirror in which excitation light supplied from said excitation light source unit and light supplied from said first solid-state light source are combined and exited as a combined light; and a color-combining unit that is provided with first to fourth surfaces, light that is combined by said dichroic mirror being supplied to said first surface, and from said combined light supplied to said first surface, said excitation light being exited toward said phosphor unit from said second surface, said first light being exited from said fourth surface, said fluorescent light emitted from said phosphor unit being supplied to said second surface, said fluorescent light that was supplied to said second surface being exited from said fourth surface, said second light that was supplied from said second solid-state light source being supplied to said third surface, and said second light that was supplied to said third surface being exited from said fourth surface; wherein said collimator lens condenses said excitation light that was exited from said second surface of said color-combining unit on said phosphor unit.