Radiometric Calibrations DH-2000-CAL HL-2000-CAL
Spectrometers measure an electrical signal (A/D counts) vs wavelength. Relating that signal to something meaningful requires comparison to a standard or reference. For reflection measurements, this is provided by a reflection standard (100% white or specular). For transmission or absorbance this could be air, or a cuvette with a blank solution representing 100% transmission.
For optical power, the standard has to be a light source. The source is designed to be very stable, and to present a uniform sampling plane where the irradiance (power/area/nm) can be established. These lamps are themselves calibrated at our lab, compared to a NIST traceable lamp and NIST traceable power supply.
For special calibration needs give us a call!