System and method for computed axial lithography (CAL) for 3D additive manufacturing
US10647061B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 12, 2017 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Dec 29, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y30/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming a three dimensional (3D) object is disclosed. The method may involve providing a volume of photo-curable resin contained within an optically transparent resin container, and simultaneously directing optical projections from an optical subsystem at a plurality of angles θ through the volume of photo-curable resin. The optical beams are directed about a z axis extending through the volume of photo-curable resin. Each of the projections is provided with a calculated 2D spatial intensity function which creates a 3D intensity map. The projections act over a fixed temporal exposure period, during which the net exposure dose is sufficient to cure select portions of the volume of photo-curable resin, and to leave other portions uncured, to form a desired 3D part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.