Abstract
It is shown that the efficiency of the cathodoluminescence process is the
derivative of the light generated as a function of the energy of the electrons
striking the phosphor. Ordinary measurements of light output as a function of
electron beam energy are corrected for: electrons not striking the phosphor,
loss of electron energy in passing through an aluminum film backing the
phosphor, and loss of generated light absorbed in the phosphor layer. The
intrinsic efficiency of zinc-cadmium sulfide proves to be much higher than any
previously reported “efficiencies.”
© 1949 Optical Society of America
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