| 摘要 |
Dynode for T.V. camera tubes with a re-entrant electron beam, in which Pd is sprayed on to a polished sheet of glass and is coated with a layer of Cu of >=20 mu thickness. These are then peeled from the glass as a sheet and a portion of the sheet is placed and fixed on a support with a central opening. The surface of the dynode is sanded with fine sand and vapour deposited with Cr. Sanding may be effected with aluminium oxide particles of 20 mu particle size. |
