| 摘要 |
PCT No. PCT/GB93/02621 Sec. 371 Date Aug. 8, 1995 Sec. 102(e) Date Aug. 8, 1995 PCT Filed Dec. 20, 1993 PCT Pub. No. WO94/15230 PCT Pub. Date Jul. 7, 1994A colliding shock wave lens consists of a set of spark gaps capable of generating a number of shock waves in a gaseous medium which coalesce at the centre of the device, forming a region of transitory high density gas. This region of high density acts as a converging lens, momentarily capable of focusing a pulsed laser beam, timed to pass through the lens at the right instant. The lens may be used to modulate a laser beam or to Q-switch a laser.
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