... -on photomultiplier tubes, borosilicate glass,double-alkali photocathode, 170 ~ 350nm spectral response, using a specially designed anti-lag structure, with excellent output ... , optical properties to identify,replicate equipment. General data: Spectral Response Range300~680nmWavelength of Maximum Response 420nmMinimum effective AreaΦ28.5mmDynodeStructureRing FocusedNumber of Stage9Window ...