centroid wavelength

[4.7.2] lambda _{c}

NOTE: This term was added in RP-16-17 Addendum 1.

The wavelength at the weighted center of the spectrum of a monochromatic device under test (DUT); this is the weighted average of each wavelength and is defined by:

lambda_{c}= left [int_{lambda_1}^{lambda_2}lambda cdot S(lambda) dlambdaright ]/left [int_{lambda_1}^{lambda_2}S(lambda) dlambdaright ]  ,

where λ is the wavelength and P(λ) is the spectral power distribution of the monochromatic DUT.

« Back to Definitions Index