OL 245H 45-W Irradiance Standard (Total and Spectral 250 – 2500 nm)
The OL 245H is a 45-W Irradiance Standard lamp. These lamps have tungsten coiled-coil filaments enclosed in a small quartz envelope. The spectral irradiance calibration of this lamp covers the 250-2500 nm wavelength range. The OL 245H uses the OL 410-150 Precision Lamp Source, OL 57 Lamp Holder and the OL 63 Adjustable Lamp Holder Mount.
The OL 245H is a 45-W Total and Spectral Irradiance Standard lamp. These lamps have tungsten coiled-coil filaments enclosed in a small quartz envelope. The spectral irradiance calibration of this lamp covers the 250-2500 nm wavelength range.
The Spectral Irradiance standards issued by Optronic Laboratories are based on the National Institute of Standards and Technology (NIST) Spectral Irradiance Scalefor the wavelength range of 250 to 2400 nm and on a blackbody for the wavelength range above 2400 nm. The NIST Scale has an uncertainty (k=2) of 0.63% in the visible, 1.56% in the ultraviolet at 250 nm, and 0.31% in the infrared at 2000 nm.