Patent ID: 8783902

Claim:
An illuminating device comprising: a light source configured to include plural light emitters, each having a different spectral distribution; a light source control unit configured to determine an emission intensity of each of the light emitters, and control the light emitters to have the emission intensities; an estimation unit configured to estimate a spectral reflectivity of an object to which illuminating light is irradiated from the light source; a first calculating unit configured to calculate a first evaluation value, indicating an adequacy of a color of the object visually perceived, based on the spectral distributions and the spectral reflectivity; and a second calculating unit configured to calculate a second evaluation value, indicating how much an influence is given by the illuminating light to factors other than a visual sense, based on the spectral distributions, wherein the light source control unit determines the emission intensities by which the first evaluation value and the second evaluation value satisfy a restraint condition determined beforehand.