Spectral Irradiance measurements can be done in different setups and wavelength ranges, like with fiber optic cosine corrector or integrating sphere. Irradiance measurements can be done in the UV, VIS as well in the NIR range.
For absolute irradiance measurements a spectrometer can be configured and radiometrically calibrated in the Avantes calibration laboratory with a range from 200 to 400 nm or from 350-1100 nm for a combined UV/VIS range of 200-1100nm, or for the 1100-2500nm range. This calibration is done on a fixed setup, i.e. fiber optics and diffusor can not be changed afterwards.
In order to be more flexible in the setup a calibration can be performed on location with a calibrated VIS/NIR light source (AvaLight-HAL-CAL) or calibrated UV/VIS/NIR light source (AvaLight-DH-CAL).
Our comprehensive AvaSoft-IRRAD software allows you to perform and load irradiance calibrations.
A typical setup for irradiance measurement is given below.
Components used in the irradiance measurement setup are depicted in the following table:
UV Irradiance
VIS Irradiance
NIR Irradiance
Spectrometer
AvaSpec- 2048
AvaSpec-NIR256-2.5
Grating UC (200-400nm), DUV, 50 µm slit
Grating VA (360-1100nm), 50µm slit, OSC
Grating NIRY (1100-2500nm), 50µm slit, OSF1000
Grating UA (200-1100nm), DUV, 50µm slit, OSC-UA
Software
AvaSoft-full and AvaSoft-IRRAD
Calibration
IRRAD-CAL-UV (200-400 nm)
IRRAD-CAL-VIS (360-1100nm)
IRRAD-CAL-NIR (1100-2500nm)
IRRAD-CAL-UV/VIS (200-1100nm)
Light source (optional)
AvaLight-DH-CAL Calibrated Deuterium-Halogen light source with CC-UV/VIS
AvaLight-HAL-CAL Calibrated halogen light source with CC-UV/VIS
AvaLight-HAL-CAL extra NIR Calibrated halogen light source with CC-VIS/NIR
Fiber optics
1 pcs. FC-UV200-2 fiber 200µm UV/VIS, 2m, SMA
FC-IR200-2 fiber 200µm VIS/NIR, 2m, SMA
Accessories
CC-UV/VIS cosine corrector or AvaSphere-IRRAD-CAL integrating sphere
