Patent ID: 8304973
Filing Date: 2012-11-06
Classification: H01J

Abstract:
1. A flash lamp comprising: a hermetically sealed container filled with a discharge gas; a cathode and an anode for generating an arc discharge, arranged in the hermetically sealed container; and a first trigger electrode and a second trigger electrode for generating a preliminary discharge prior to the arc discharge, arranged in the hermetically sealed container, wherein a front end part of the cathode and a front end part of the anode are opposed to each other on a predetermined reference line, a front end part of the first trigger electrode is located closer to the cathode than a front end part of the second trigger electrode in a direction parallel to the reference line, the front end part of the first trigger electrode is formed on one side of a predetermined reference surface including the reference line, so as to have a pointed shape tapering toward the reference line such that a terminal end thereof is separated from the reference line, and the front end part of the second trigger electrode is formed on the other side of the reference surface, so as to have a pointed shape tapering toward the reference line such that a terminal end thereof is separated from the reference line, and a hypothetical line connecting the terminal end of the front end part of the first trigger electrode and the terminal end of the front end part of the second trigger electrode crosses the reference surface at an oblique angle.