Strehl ratio


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Strehl ratio

[′strāl ‚rā·shō]
(optics)
The ratio of the peak field amplitude in the focus of an optical element to the diffraction-limited amplitude.
References in periodicals archive ?
The on-axis performance of the design is impressive, yielding a Strehl ratio of 0.
Thus, an optical system free of defects would have a Strehl ratio of 1.