external quantum efficiency, <of a detector>
quantum efficiency, <of a detector>
quotient of the number of elementary events (such as release of an electron) contributing to the output and the number of incident photons, including those reflected by the detector
Note 1 to entry: See also "internal quantum efficiency".
Note 2 to entry: The external quantum efficiency has unit one.
Note 3 to entry: This entry was numbered 17-421 and 17-1010 in CIE S 017:2011.