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|1. (WO2018163830) LIGHT SOURCE DEVICE|
|Applicants:||PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
|Title:||LIGHT SOURCE DEVICE|
This light source device is provided with: an excitation light source; and a fluorescence layer that emits fluorescence upon receiving excitation light from the excitation light source. The fluorescence layer comprises at least one selected from the group consisting of a first fluorescence substance by which a peak wavelength of fluorescence emitted by the excitation light is 400-510 nm, and a second fluorescence substance by which a peak wavelength of fluorescence emitted by the excitation light is 580-700 nm. A fluorescence lifetime of each of the first fluorescence substance and the second fluorescence substance is 0.1-250 ns. The energy density of the excitation light is 10 W/mm2 or more.