Ocean Optics OOIIrrad-C - Manual (Page 7)

Chapter 1
OOIIrrad-C Overview
The OOIIrrad-C software application provides spectroradiometric functionality for your Ocean Optics
Charge Couple Device (CCD)-based spectrometer. A CCD-based spectrometer is an instrument that
breaks light into its components using a grating and then measures the intensity at different wavelengths
(using the CCD).
Different gratings are available for use in different systems. These gratings have varying efficiencies. The
following figure illustrates a few of the common gratings used.
The curves show what typical scans look like when an ideal light of even intensities across the spectrum
is split into its wavelength components using these gratings.
In addition to grating efficiency curves, there is also an issue with the CCD’s sensitivity to different
wavelengths. The following figure shows a typical CCD sensitivity curve.
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