| 摘要 |
<p>PCT No. PCT/SU88/00176 Sec. 371 Date May 8, 1990 Sec. 102(e) Date May 8, 1990 PCT Filed Sep. 1, 1988 PCT Pub. No. WO90/02628 PCT Pub. Date Mar. 22, 1990.A method of manufacturing filters by laser treatment, wherein working is done by a laser beam and a jet of working gas. An absorbing coating is applied to a surface to be worked. The laser beam is focused to form a focal spot within a work piece at a depth h1 from its surface with 0.025</=h1/h<0.22 where h is the thickness of the work piece. Abrasive particles are introduced in a pulsed periodic manner into said jet of working gas at the moment the variation amplitude of the volume of molten metal in a cutting cavity reaches a maximum value. A device for manufacturing filters has a laser, a nozzle with an optical laser focusing system, and a mechanism for controlling the yield of an absorbing coating.</p> |
