Ushio Denki Kabushiki Kaisha

Yutaka Mune

Takeo Matsushima

Yukio Yasuda

To stabilize the illumination fluctuation rate of a short arc type discharge lamp of the type having a pair of electrodes disposed inside an arc tube in a manner of facing each other and a hydrogen getter, by absorbing hydrogen gas in an arc tube without causing a decline in the performance of the short arc type discharge lamp arising out of a hydrogen getter, the hydrogen getter is formed of a hollow container made of a material that allows the transmission of hydrogen with a getter material sealed tightly inside the hollow container, and a holder for the hydrogen getter is held on the electrode with the hydrogen getter fixed in the holder.

Short arc type discharge lamp

To provide a flickerless discharge lamp which can remove hydrogen by a simple and safe means even if the lamp is a large discharge lamp with high pressure when lit, the discharge lamp has a pair of electrodes and a hydrogen getter () in the interior of an arc tube, the hydrogen getter () being formed of a container () made of metal which is hydrogen permeable and a hydrogen absorbent body () that is composed of a metal which can absorb hydrogen that is enclosed inside of the container () and is fixed to an inside wall of the container ().

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Himeji, Japan

Yutaka Mune