Patent ID: 11958129
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Optics (Instruments)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A laser processing device comprising:
a condensing lens configured to condense laser light supplied from a light source onto a surface of a structure to irradiate the surface of the structure;
a varifocal lens disposed on an optical path of the condensing lens;
a condensation position measurement device configured to measure the laser light at a position between the condensing lens and the structure and measure a condensation position where the laser light is condensed by the condensing lens based on the laser light measured at the position between the condensing lens and the structure; and
a condensation position controller configured to control a focal position of the varifocal lens such that a difference between the condensation position measured by the condensation position measurement device and a prescribed condensation position falls within a first preset acceptable range.