Patent ID: 11878367
Assignee: CANON KABUSHIKI KAISHA
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 8:
9. An article manufacturing method, comprising:
processing a subject using an optical device which processes the subject by irradiating the subject with laser light; and
processing the subject which has been subjected to the processing in the step,
wherein the optical device includes:
a first galvano mirror optical system including two galvano mirrors and configured to adjust an incident angle of the laser light incident on the subject in two directions by driving the two galvano mirrors;
a focal position adjustment mechanism including a movable lens and configured to adjust a focal position of the laser light in a focal direction by driving the movable lens;
a second galvano mirror optical system including another two galvano mirrors and configured to adjust an incident position of the laser light incident on the subject in two directions perpendicular to the focal direction of the laser light by driving the another two galvano mirrors; and
a control unit configured to control driving of the two galvano mirrors of the first galvano mirror optical system, the movable lens, and the another two galvano mirrors of the second galvano mirror optical system,
wherein the control unit controls the driving of the another two galvano mirrors of the second galvano mirror optical system based on the driving of the movable lens so as to correct a shift of the incident position of the laser light obliquely incident on the subject due to a change of the focal position by the driving of the movable lens.