Electron tube having a photocathode, photocathode for such a...

Details Electron tube having a photocathode, photocathode for such a... Electron tube having a photocathode, photocathode for such a...

H - Electricity

01

J

313/73

H01J 40/16 (2006.01) H01J 9/12 (2006.01) H01J 29/38 (2006.01)

Patent

CA 1043415

ABSTRACT An electron tube having a photocathode for light with a wavelength in the near infra-red comprising a p-con- ductive conversion layer of the III-V-type which is formed of at least one element selected from the third column of the Periodic Table and at least one element selected from the fifth column of the Periodic Table. The electron tube includes a window consisting of an oxidic monocrystalline body of cor- undum on which the photocathode is secured by a glass which is pervious in the relevant wavelength range and is chemically resistant. The glass is selected from barium boroaluminate and calcium boroaluminate having the composition 15-35% CaO or 10-35% BaO. 45-70% B2O3 and 10-20% Al2O3.

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