3D printing method
US12366843B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2023 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Feb 21, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/35134
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A volumetric 3D printing method for producing a three-dimensional object starting from a three-dimensional template object that is made of a virtual object material. The method includes: a) providing (i) projection images that are two-dimensional light distributions of pixels, and projections of the template object in various respective projection directions, (ii) a projection device configured to sharply image the projection images in a specified depth of field range about a focal plane in an irradiation direction, and (iii) a container that contains a photosensitive substance configured to cure in areas in which a light intensity threshold value is exceeded; and b) imaging the projection images so that the light intensity threshold value of the light-sensitive substance is exceeded in the areas that correspond to the three-dimensional object to be produced. The individual projection images are imaged in different angular positions, and when in an angular position the extension of the object to be produced along the irradiation direction of the projection device in this angular position is at least twice as large as the specified depth of field range, the focal plane is displaced …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.