OL 752-12 Standard of Spectral Irradiance (200 – 400 nm)

The OL 752-12 is calibrated for spectral irradiance over the wavelength range of 200 to 400 nm It uses a stable, 40-W deuterium lamp. When mounted in the plug-in/pre-aligned housing, the working distance is 10 cm. This short working distance generates considerably higher irradiance levels than that obtained with conventional ultraviolet irradiance standards. The OL 752-12 is calibrated relative to the NIST Ultraviolet Irradiance Standard for the region below 250 nm and to the NIST High-Accuracy Scale of Spectral Irradiance for the 250 to 400 nm region. The NIST Ultraviolet Irradiance Standard has an uncertainty that varies from ± 7.5% at 200 nm to ± 5% at 250 nm. The OL 752-12 has a transfer uncertainty relative to the NIST Scales that varies from ± 3% at 200 nm to ± 1.5% at 400 nm.