Flash lamp, a corresponding method of manufacture and apparatus for the same

1. A flash lamp comprising an insulative envelope containing a gas and housing a pair of arcing electrodes, each electrode having a tip, wherein each electrode and its tip are made from a conductive material, wherein at least one instance of isolated conductive material is formed at a predetermined location on the inside of the envelope adjacent one of the electrodes, and wherein the isolated conductive material is formed from evaporated material of the conductive material of the electrode.

2. The flash lamp according to claim 1 wherein a plurality of instances of isolated conductive material are formed at predetermined locations on the inside of the envelope adjacent one of the electrodes.

3. The flash lamp according to claim 1 wherein the envelope is elongate, and wherein the at least one instance of isolated conductive material is formed on the inside of the envelope in a region bounded by respective planes orthogonal to the direction of elongation and passing through the extremities of one of the electrodes.

4. The flash lamp according to claim 3 wherein the envelope is elongate, and wherein the at least one instance of isolated conductive material is immediately adjacent the arcing end of the electrode to which the at least one instance of isolated conductive material is adjacent.

5. The flash lamp according to claim 1 wherein the at least one instance of isolated conductive material formed on the inside of the envelope has a predetermined shape.

6. The flash lamp according to claim 1 wherein the at least one instance of isolated conductive material formed on the inside of the envelope has a geometric shape.

7. A method of manufacturing a flash lamp comprising:

providing an insulative envelope containing a gas housing a pair of arcing electrodes in the insulative envelope, each electrode having a tip, wherein each electrode and its tip are made from a conductive material, and

forming at least one instance of isolated conductive material at a predetermined location on the inside of the envelope adjacent one of the electrodes,

wherein the at least one instance of isolated conductive material is formed by localized heating of an area of one of the electrodes from an external heat source whereby evaporated material of the conductive material of the electrode forms on the envelope, adjacent the heated area.

8. The method according to claim 7 wherein a plurality of instances of isolated conductive material are formed at predetermined locations on the inside of the envelope adjacent one of the electrodes.

9. The method according to claim 7 wherein the envelope is elongate, and wherein the at least one instance of isolated conductive material is formed on the inside of the envelope in a region bounded by respective planes orthogonal to the direction of elongation and passing through the extremities of one of the electrodes.

10. The method according to claim 9 wherein the at least one instance of isolated conductive material is immediately adjacent the arcing end of the electrode to which the at least one instance of isolated conductive material is adjacent.

11. The method according to claim 7 wherein the at least one instance of isolated conductive material formed on the inside of the envelope has a predetermined shape.

12. The method according to claim 7 wherein the at least one instance of isolated conductive material formed on the inside of the envelope has a geometric shape.

13. The method according to claim 7 wherein the shape of the conductive material is determined by movement of the external heat source relative to the electrode being heated.

14. The method according to claim 7 wherein the external heat source is a laser.