Patent ID: 9046234
Filing Date: 2015-06-02
Classification: F21S,G02B,H02S,Y02E

Abstract:
1. A simulated sunlight irradiation apparatus comprising: a first light source emitting first light; a second light source emitting second light having a spectral distribution different from a spectral distribution of the first light; at least one first optical filter having a transmittance characteristic for controlling a transmittance of the first light; at least one second optical filter having a transmittance characteristic for controlling a transmittance of the second light; a light selecting section causing simulated light to be emitted, by mixing light selected from the first light and the second light having entered the light selecting section, the first light having a transmittance controlled by the at least one first optical filter, the second light having a transmittance controlled by the at least one second optical filter; a light guide plate which the simulated sunlight emitted from the light selecting section enters; a light extracting section causing the simulated sunlight having entered the light guide plate to be extracted through an irradiation surface of the light guide plate, at least one of the at least one first optical filter and the at least one second optical filter being provided so as to be switchable to another optical filter having a transmittance characteristic that is different from the transmittance characteristic of the at least one of the at least one first optical filter and the at least one second optical filter.