Koto Electric Co., Ltd.

Takayuki Kameya

Hiroshi Ishizaki

Kazuya Abe

Hiroshi Okagaki

Akihiro Hashiguchi

A hollow cathode discharge tube is used for atomic absorption analysis. The tube has a cathode which includes a first hollow portion and a second hollow portion connected to each other. The second hollow portion has a diameter greater than the first hollow portion and a close end. Inserted through the closed end is a rod-like anode which has a part within the hollow space of the cathode. There is a auxiliary electrode which can be an auxiliary anode that surrounds the rod-like anode and is insulated therefrom. There is an additional electrode which can be an auxiliary cathode at the front end portion of the cathode. The cathode is formed of a material that is a material or includes a material that is to be analyzed.

Hollow cathode discharge tube

A large output discharge lamp comprising rod-like electrodes having confronting ends defining therebetween the discharge gap and being disposed in a bulb body. The other ends of the electrodes extend sealingly into two oppositely extending side tube which are integrally formed with the bulb body. Molybdenum foils are connected respectively with the electrodes and disposed and sealed respectively in the side tubes. Flexible metal pieces are respectively connected with the molybdenum foils and are disposed in the side tubes and outwards of the molydenum foils. Lead rods are connected respectively with the flexible metal pieces through molybdenum cups and disposed in the side tubes. The outer end portions of the side tubes are sealed and bases are respectively mounted thereon which are connected to the lead rods respectively.

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Ohmiya, Japan

Takayuki Kameya