DISCHARGE LAMP

• Main Author: SAKAI NORIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 06.01.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY

To provide a discharge lamp that emits i-lines, capable of suppressing the fluctuation of an arc.SOLUTION: In a discharge lamp that emits i-lines, a cathode 20 and an anode 30 are arranged to be offset along an electrode shaft E in an arc tube 12. In the discharge lamp, an included angle θ between a first line L1 and a second line L2 is 60° or more when the first line L1 passing through the outer line of a reduced diameter portion 32 of the anode 30 at the maximum tilt angle α with respect to the electrode shaft E from the center C of a cathode tip and the second line L2 in contact with the inner line N of the arc tube at a contact point P that is an intersection point between the first line L1 and the inner line N of the arc tube 12 are drawn.SELECTED DRAWING: Figure 2 【課題】ｉ線を放射する放電ランプに対し、アークの揺らぎを抑える。【解決手段】ｉ線を放射する放電ランプにおいて、発光管１２内で陰極２０と陽極３０とを電極軸Ｅに沿ってオフセット配置する。そして、陰極先端中心Ｃから電極軸Ｅに対する最大傾斜角度αで陽極３０の縮径部３２の外郭ラインを通る第１のラインＬ１と、第１のラインＬ１と発光管１２の内郭ラインＮとの交点を接点Ｐとして発光管内郭ラインＮと接する第２のラインＬ２とを規定したとき、第１のラインＬ１と第２のラインＬ２との挟角θを、６０°以上にする。【選択図】図２