Patent ID: 11931827
Assignee: HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 7:
8. A laser cutting method, comprising:
adjusting a spot of a laser beam emitted by a laser to have an appropriate size through a beam expanding element, such that the adjusted laser beam is capable of passing through a spectroscopic element completely;
forming the adjusted laser beam into multiple annular light beams by passing through the spectroscopic element;
passing the multiple annular light beams through a focusing lens and forming the multiple annular light beams into multiple focal points arranged spaced away on an optical axis of the focusing lens, and wherein the number of focal points is greater than or equal to two, a distance between adjacent focal points in air is less than or equal to 20 μm; and
distributing the multiple focal points formed by the focusing lens inside a processed material, and the multiple focal points being capable of forming a plurality of modified layers inside the processed material.