ANODE FOR SHORT ARC DISCHARGE LAMP, AND METHOD OF MANUFACTURING THE SAME

• Main Authors: TAKAMURA SHUICHI, FUJITA KAZUNOBU, KOBAYASHI TAKAHIRO, MAENAKA SHIRO
• Format: Patent
• Language: English; Japanese
• Published: 05.09.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY

PROBLEM TO BE SOLVED: To provide an anode for a short arc discharge lamp, the surface heat dissipation rate of which is improved.SOLUTION: A large number of fibrous nano protrusions each having a length of about 1 μm are formed on the body side of an anode by plasma treatment mentioned later. When the fibrous nano protrusions are adopted for the anode, arc flow on the surface of the anode becomes fast since surface roughness on the anode surface is small. Thereby, heat is efficiently transferred from the anode to the arc flow, and cooling effect of the anode surface increases more. Since the surface form of the fibrous nano protrusions is finer than conventional anode surfaces, they function as a kind of protective barrier against a high temperature arc flow.SELECTED DRAWING: Figure 1 【課題】表面放熱率を向上させたショートアーク放電ランプ用の陽極を提供する。【解決手段】陽極１の本体側面には、後述するプラズマ処理により、1μm程度の長さの繊維状ナノ突起が多数形成されている。陽極表面の表面粗さが小さいので、陽極に採用した場合、陽極表面のアーク流は速くなる。これにより陽極からアーク流への熱移動が効率よくなり、陽極表面の冷却効果がさらに増大する。繊維状ナノ突起は、従来の陽極表面よりも表面形態が繊細であるので高温のアーク流に対して一種の防護壁として機能する。【選択図】図１