| 摘要 |
PROBLEM TO BE SOLVED: To provide a short-arc discharge lamp preventing a sealing tube and step-joined glass from being damaged and deformed due to light propagating through the sealing tube.SOLUTION: In a short-arc discharge lamp, a sealing tube 4 provided continuously to an arc tube 3 and an electrode core rod 6 supporting an electrode 5 disposed in the arc tube 3 are sealed via step-joined glass 7. In the short-arc discharge lamp, a light radiation surface and a light reflection surface are provided on the surface of the sealing tube 4, and light propagating through the sealing tube 4 is radiated from the light radiation surface to the outside.SELECTED DRAWING: Figure 2 |
