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Solar Simulator Standards – Definitions & Comparisons

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Solar Simulator Standards – Definitions & Comparisons

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A solar simulator is a light source that approximates the illumination of natural sunlight. The ability of a solar simulator to approximate natural sunlight is based on three criteria: (1) spectral match, (2) spatial non-uniformity of irradiance and (3) temporal instability. This technical note describes each of these criteria and the three international compliance standards used to define solar simulator performance. As the output of a solar simulator is white light, spectral match defines how well its distribution of irradiance among different wavelengths approximates natural sunlight. Spectral match is therefore a measurement of the distribution of irradiance across six defined wavelength ranges (bins) as a percentage of the total irradiance.

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