Short arc type discharge lamp
AssigneeUshio Denki Kabushiki Kaisha
InventorsMitsuru Ikeuchi, Akihiro Shimizu, Tomoyoshi Arimoto
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Abstract
A short arc type discharge lamp wherein a cathode and an anode are arranged opposite to each other in an interior of a light emitting tube and said cathode comprises a main part made from tungsten and a tip end part made from thoriated tungsten, wherein thorium oxide particles having been peripherally coated with thorium are contained in the tip end part of said cathode.
Claims4
A short arc type discharge lamp wherein a cathode and an anode are arranged opposite to each other in an interior of a light emitting tube and said cathode comprises a main part made from pure tungsten and a tip end part made from thoriated tungsten,
- wherein thorium oxide particles having been peripherally coated with thorium are contained in the tip end part of said cathode.
Dependencies are inferred from the claim text.