"Ratio (of a detector such as a CCD) of actual number of detected photons and the number of incident photons."@en . "quantum efficiency"@en . _:b19828 _:b19829 . _:b19828 . _:b19832 . "QE" . _:b19832 . _:b19829 . _:b19829 . _:b19832 . . _:b19829 . . _:b19828 . . . _:b19832 . _:b19828 .