High-pressure discharge lamp with shielded electrode
The invention relates to a high-pressure discharge lamp having a discharge envelope (3) with a ceramic wall provided with at least one electrode (4). The electrode (4) comprises a rod (41) which is connected to a tubular lead-through member (40) and on which an emitter-containing element (42) is arr...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention relates to a high-pressure discharge lamp having a discharge envelope (3) with a ceramic wall provided with at least one electrode (4). The electrode (4) comprises a rod (41) which is connected to a tubular lead-through member (40) and on which an emitter-containing element (42) is arranged. By means of a screening body (43), the emitter-containing element (42) is screened on its outer side. According to the invention, the screening body (43) extends with a constant cross-section from the tubular lead-through member (40) to the end of the emitter-containing element (42) facing the discharge path. Thus, an improved temperature control is obtained within the discharge envelope (3) during operation of the lamp. |
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