Ocean Optics Curie UV-VIS Emission - Manual (Page 54)

C: Relative Irradiance Mode
Common applications include characterizing the light output of LEDs, incandescent lamps, and other
radiant energy sources such as sunlight. Relative irradiance measurements also include fluorescence
measurements, which measure the energy given off by materials excited by light at shorter wavelengths.
Before you can access Relative Irradiance Mode, you must take a reference spectrum in Scope Mode of a
blackbody of known color temperature. Additionally, you must obtain a dark spectrum by removing the
fiber from the reference lamp and preventing light from entering it.
An example of Curie spectra for quinine sulfate measured in Scope mode (S) versus Relative Irradiance
mode (I) is shown below.
Calibrating the Spectrometer for Relative
Irradiance
Preparing for Calibration
To recalibrate your Curie for relative irradiance, you need the following:
‰
A light source of known color temperature. Ocean Optics’ LS-1-LL is ideal for recalibration.
‰
The Curie system
‰
An optical fiber (maximum 50 µ m works best)
‰
A cuvette wavelength calibration adapter such as the PS-HG1-ADP
‰
A spreadsheet program (Excel or Quattro Pro, for example) or a calculator that performs third-
order linear regressions
48 640-11100-000-02-0406