Patent ID: 8558536

Claim:
A solar simulator comprising: a first light source; a second light source of which wavelength band is different from the wavelength band of the first light source; a first irradiance detector which measures an intensity of a first flash from the first light source; a first waveform control device which controls so as to make a top of a first light pulse shape of the first light source to be flat by measurement of the first irradiance detector; a second irradiance detector which measures an intensity of a second flash from the second light source; a second waveform control device which controls so as to make a top of a second light pulse shape of the second light source to be flat by measurement of the second irradiance detector; a load circuit which applies a load to a photovoltaic device as a measurement object; and a total control device which controls the first light source, the second light source, the first waveform control device, the second waveform control device and the load circuit; wherein the total control device once or plural times makes the second light source emit the second flash of which the second light pulse shape is flat and is shorter pulse than the first flash of the first light source while the top of the first light pulse shape of the first light source is flat.