ULTRAVIOLET RAY DISCHARGE TUBE AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a method for manufacturing a UV tube, capable of controlling a deflection of an anode electrode caused during a laser welding process, and to provide a UV tube capable of stabilizing discharge characteristics.SOLUTION: In a process for laser welding one end parts of...

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Bibliographic Details
Main Authors MATSUDA YUKI, KATAGIRI MUNEKAZU
Format Patent
LanguageEnglish
Japanese
Published 22.06.2015
Subjects
BASIC ELECTRIC ELEMENTS
COLORIMETRY
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:PROBLEM TO BE SOLVED: To provide a method for manufacturing a UV tube, capable of controlling a deflection of an anode electrode caused during a laser welding process, and to provide a UV tube capable of stabilizing discharge characteristics.SOLUTION: In a process for laser welding one end parts of kovar wires 18a-18c to through holes 17a-17c of an anode electrode 15, a laser beam is irradiated on a position shifted in a same direction from center parts of end face parts 19a-19c of the kovar wires 18a-18c to a center part of the anode electrode 15 along a surface 20 of the anode electrode 15, respectively. Thus, by controlling a direction in which melted kovar flows, a deflection of the anode electrode 15 after having been welded can be controlled. 【課題】レーザー溶接の工程で生じるアノード電極のたわみを制御することができるＵＶチューブの製造方法を提供する。また、放電特性を安定させることができるＵＶチューブを提供する。【解決手段】アノード電極１５の貫通孔１７ａ〜１７ｃにコバール線１８ａ〜１８ｃの一端部をレーザー溶接する工程において、コバール線１８ａ〜１８ｃの端面部１９ａ〜１９ｃの中心部から、アノード電極１５の表面２０に沿ってアノード電極１５の中心部に対してそれぞれ同じ方向にずらした位置にレーザー光を照射する。これにより、溶融したコバールが流れる方向を制御することで、溶接後のアノード電極１５のたわみを制御する。【選択図】図１
Bibliography:Application Number: JP20130257236