Patent ID: 8729919

Claim:
A light source evaluation device, comprising: a spectro-radio meter that measures a spectral irradiance L (λ) of a light source for illuminating a measurement target solar cell; a first storage unit that stores a pre-measured spectral irradiance S (λ) of reference sunlight; a second storage unit that stores, as a spectral responsivity Pi (λ) at each of a plurality (i) of irradiation levels, a dependency P (λ, Ib) for each wavelength λ of a short-circuit current Ib generated by white bias light of the solar cell, which is pre-measured with changing the irradiance level in a plurality (i) steps; and a computing unit that computes a value for adjusting a light quantity of the light source for illuminating the solar cell, using a spectral responsivity Ps (λ) of the solar cell corresponding to the irradiance level of each wavelength of the light source determined by computation using the spectral responsivity Pi (λ) at each of the plurality (i) of irradiation levels of the solar cell, the spectral irradiance S (λ) of the reference sunlight, and the spectral irradiance L (λ) of the light source, wherein based on a relation between an amount of change in short-circuit current and an amount of change in irradiation intensity of light, the spectral responsivity Pi (λ) that the spectrum of the reference sunlight has a spectral irradiance that generates short-circuit current Ib that is the same as in the case where an irradiation light energy is a prescribed value, is used as the spectral responsivity Ps (λ).