Ocean Optics OOIColor - Manual (Page 11)

8
Emissive Color Measurements
OOIColor also supports the measurement of emissive color, such as the light emitted from an
LED or a lamp. The experimental techniques are quite different from the measurement of
reflective color, and are outlined below.
The experimental configuration of the emissive color measurements consists of a single optical
fiber. One end of the fiber is placed in the spectrometer, and the other end is pointed at the light
source to be analyzed. To make emissive color measurements, you still must record a reference
and dark spectrum. The reference spectrum required for emissive color measurements is the
output of a blackbody illuminant at a known color temperature. For example, Ocean Optics offers
a miniature tungsten-halogen source, which behaves as a blackbody at 3100K. To take a reference
spectrum of the blackbody source, simply point the optical fiber at the source and click Store
Reference. You may be instructed to increase or decrease the integration time of the spectrometer,
as outlined above. After the reference is stored, you then must click Store Dark to record the dark
spectrum of the spectrometer. Make sure that when you do this, the optical fiber is not pointing at
any light source. Now, click Start Acquisition to begin acquiring color data, and point the optical
fiber at the light source to be analyzed.