| 摘要 |
<p>A hydrogen getter for use within the arc tube assembly of a gas discharge lamp, eg a high pressure sodium discharge lamp, comprises a layer (11) of a getter material (eg Ti) sandwiched by diffusion bonding between layers (12, 13) of a hydrogen permeable material (eg Nb) there being an exposed region of the getter material. Hydrogen getters in the form of disc-like washers are formed from the sandwiched layers by a stamping process.</p> |
