4: Sample Experiments
Typical Relative Irradiance Setup
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 that have been excited by light at shorter
wavelengths.
►
Procedure
Perform the following steps to take a relative irradiance measurement using OOIBase32:
1. Place OOIBase32 is in Scope mode by clicking the
Scope Mode
icon on the toolbar, or by
selecting
Spectrum | Scope Mode
from the menu bar.
2. Ensure that the entire signal is on scale. The intensity of the reference signal should peak at about
50,000 counts.
Note
The light source must be a blackbody of known color temperature.
3. In
the
Reference Color Temperature
dialog box, enter the color temperature of the light source
(in Kelvin) and click the
OK
button.
4. Take a reference spectrum using a light source with a black body of a known color temperature,
such as the LS-1.
Click the
Store Reference
spectrum icon on the toolbar or select
Spectrum | Store Reference
from the menu bar to store the reference. This command merely stores a reference spectrum in
memory. You must select
File | Save | Reference
from the menu bar to permanently save the
spectrum to disk.
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