Patent Number: 6,297,591

Title: Chimney-cooled arc lamp electrode

Abstract: An arc lamp comprising a hollowed-anode electrode with an arc-face having a central hole extending to an internal chimney. An opposing cathode electrode faces the hollowed anode electrode for providing a short electric arc around the central hole in the arc-face of the hollowed anode electrode. The anode and cathode electrodes are disposed in an inert gas, such as xenon. The internal gas is subject to an "arc wind" for transporting metal deposits downstream of the short electric arc and flowing from the short electric arc down the chimney. Such operation provides for an improvement in arc lamp life because the reflector blackens far less rapidly. A magnetic z-pinch pumping mode can be used to move the arc wind away from the reflector.

Inventors: Roberts; Roy D. (Hayward, CA)

Assignee: ILC Technology, Inc.

International Classification: H01J 61/00 (20060101); H01J 61/98 (20060101); H01J 017/04 (); H01J 061/04 (); H01J 001/02 (); H01J 061/52 (); H01J 007/24 ()

Expiration Date: 10/02/2018