Ushio Denki Kabushiki Kaisha

Shinji Nikawa

Tomoyoshi Arimoto

Takumi Yamane

Masashi Dan

Taro Arimoto

Xenon lamp

A short-arc discharge lamp may include an arc tube section; at least one side tube section connected to at least one end of the arc tube section; at least one electrode provided inside the arc tube section; and at least one lead rod which is provided inside the at least one side tube section and which is connected to the at least one electrode; wherein the at least one lead rod has at least one metal body disposed so as to be in contact with the at least one lead rod; the at least one side tube section has at least one reduced diameter region; the at least one lead rod is supported by the at least one reduced diameter region via the at least one metal body; and at least one coating film is formed on at least one surface of the at least one metal body.

Short-arc discharge lamp

A high-pressure discharge lamp includes a cathode body composed of a cathode made of tungsten or tungsten alloy and a lead rod inserted in a lead rod insertion hole of the cathode. The cathode has a carbonized layer made of tungsten carbide (WC) formed on a surface thereof exposed to a discharge space (except for a tip portion thereof) and on an inner surface of the lead rod insertion hole. The carbonized layer contains carbon in an amount of 0.44 g/cc to 0.53 g/cc.

Growing community of inventors

Tokyo, Japan

Shinji Nikawa