diffraction loss

diffraction loss

[di′frak·shən ‚lȯs]
(physics)
That part of the reduction in power of a propagating wave or beam that results from diffraction.
References in periodicals archive ?
By dispersing the spectrum across the MEMS chip, discrete sections of the spectrum can be 'blocked' by diffracting light into higher orders, while others can be reflected with no diffraction loss.
The formula for the relative diffraction loss in spectral power is already well known, and it is noted below.
For the radiation present at a given wavelength [lambda] the diffraction loss can be described in terms of a unit-less parameter, v = 2[pi][PSI]R/[lambda].