Chapter 5 Measurement Functions
5-10
5.3 Measuring LED (Light Emitting Diode)
A light emitting diode is an optical element with a continuous spectrum.
The following items can be measured by the LED measurement functions.
●
Peak: Peak wavelength at peak level
●
Mean Wl (n dB): Center wavelength using ndB Loss method
●
Mean Wl (FWHM): Center wavelength of spectrum half
width
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n dB Width: Spectrum width using ndB Loss method
●
FWHM (2.35 σ): Spectrum half width using RMS method
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PkDens (/1nm): Maximum spectrum density
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Total Power: Spectrum integral power
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Kσ: Spectrum width using RMS method
●
σ: Standard deviation of spectrum using
RMS
method
Figure 5.3-1 LED-Test Example
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