Patent ID: 11945043
Assignee: CONCEPT LASER GMBH
Field: Other special machines (Mechanical engineering)
Classification: CPC B  G  Y | IPC B  G

Claim 10:
11. A method of additively manufacturing a three-dimensional object, the method comprising:
directing a first energy beam to a scanner of a first optical assembly at a first angle comprising or configured as a first flat-field lens, the first flat-field lens having a first nominal scan field with a first flat focal plane; and
re-directing, via the scanner, the first energy beam at a different, second angle through a first scan field expansion assembly comprising one or more first field-expanding optical elements, the one or more first field-expanding optical elements secured to a field-expansion housing and having a flat portion and a curved portion at radially different regions, the curved portion configured to expand the first nominal scan field to a first expanded scan field coinciding with the first flat focal plane,
wherein the first expanded scan field has a cross-sectional width and/or area that exceeds a corresponding cross-sectional width and/or area of the first nominal scan field.