Producing fine irregular engaged patterns on polished metal surfaces - using interference strips produced by overlapping laterally displaced laser beam with original beam

摘要

Laser beam process for working the smooth surface of a metal substrate consists of lateral displacment of a part of the beam to produce the orginal beam with an overlapping secondary beam. After focussing the overlapping beams onto a metal surface interference strips are created in the overlapping zone which lead to a fine irregular engraved pattern on the surface. USE/ADVANTAGE - Used for creating fine engraved patter, on clock arms face and surrounding frame. The fine irregular patterns have a depth of not more than 1 micron which produce delicate rainbow colouring effects.