Pseudo sunlight emitting device

Abstract

A pseudo sunlight emitting device includes a first light source for emitting first light having a certain spectral distribution; a first light guide member for receiving, at its light incident surface, the first light from the first light source, and for emitting, via its light emission surface, light having a controlled directivity; a first optical filter for adjusting a spectrum of the light emitted from the first light guide member; a second light source for emitting second light whose accumulative irradiance in an infrared wavelength region is greater than an accumulative irradiance of a wavelength region of light shorter in wavelength than infrared light; second light guide members for receiving, at their light incident surfaces, the second light from the second light source, and for emitting, via their light emission surfaces, light having a controlled directivity; a second optical filter(s) for adjusting a spectrum of the light emitted from the second light guide member, a number of the second light guide members being greater than that of the first light guide member by n times, where n is a natural number not less than 2.

Dependencies are inferred from the claim text.