Patent ID: 9022589
Filing Date: 2015-05-05
Classification: F21S,G01N,G02B

Abstract:
1. A simulated sunlight irradiation apparatus comprising: a first light source which radiates a first ray of light; a second light source which radiates a second ray of light having a spectral distribution that is different from a spectral distribution of the first ray of light; a first optical filter which controls a transmittance of the first ray of light; a second optical filter which controls a transmittance of the second ray of light; a photoselection section which receives the first ray of light whose transmittance has been controlled by the first optical filter and the second ray of light whose transmittance has been controlled by the second optical filter, and which emits simulated sunlight by mixing together a ray of light selected from the first ray of light thus received and a ray of light selected from the second ray of light thus received; a light guide plate which receives the simulated sunlight emitted from the photoselection section; a light extraction section which takes out, to an irradiation surface of the light guide plate, the simulated sunlight received by the light guide plate; and a transmittance adjustment member which is located closer to the irradiation surface of the light guide plate than the light extraction section is, and which adjusts a transmittance of light in a portion of a wavelength band of simulated sunlight that is emitted from the irradiation surface of the light guide plate.