2: Installation and Setup
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Irradiance
Irradiance is the technique of measuring the total energy of light at a
given wavelength, either relative to the spectral output of a known source
(relative irradiance) or in absolute units of power or energy (absolute
irradiance). This is used widely in light metrology, color measurement and
environmental science. Absolute irradiance measurements require an
irradiance-calibrated spectral device. This can be done in the factory for
some configurations or by using a calibration lamp in the lab or field.
Every time a set-up is changed, the device used must be recalibrated.
For a more detailed explanation of how to calibrate a device see Chapter 6:
Calibration, or contact Ocean Optics. Use the front-mounted diffuser and SMA
adapter accessories for irradiance measurements with the Flame.
Typical Relative Irradiance Set-up for Measuring Light Power Output of an LED
Using and Integrating Sphere
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