Method and apparatus for volumetric additive manufacturing of cell-loaded resins
AssigneeEcole Polytechnique Federale de Lausanne
InventorsPaul Delrot, Damien Loterie, Christophe Moser
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Abstract
The present invention is related to a method and apparatus for the volumetric fabrication of three-dimensional objects or articles from photoresponsive materials loaded with scattering particles, by adjusting the refractive index of said photoresponsive material (12) so as to match the refractive index of said scattering particles (30), and/or using a light source emitting light of a wavelength longer than 630 nm, preferably in a range from 630 nm to 1050 nm, more preferably in a range from 650 nm to 900 nm.
Claims10
A method of fabricating a three-dimensional article comprising the steps of:
- providing, in a transparent container of an apparatus for tomographic additive manufacturing, a photoresponsive material, wherein said photoresponsive material contains scattering particles,
- adjusting a refractive index of said photoresponsive material so as to match the refractive index of said scattering particles;
- generating from a light source of said apparatus two-dimensional light-patterns based on computed tomographic projections of said three-dimensional article, and
- projecting two-dimensional light-patterns into said photoresponsive material and defining a three-dimensional dose distribution, thereby creating a distribution of alterations in said photoresponsive material, and thereby creating said article.
A method of fabricating a three-dimensional article comprising the steps of:
- providing, in a transparent container of an apparatus for tomographic additive manufacturing, a photoresponsive material, wherein said photoresponsive material contains scattering particles,
- generating from a light source of said apparatus a first set of two-dimensional light-patterns based on computed tomographic projections of said three-dimensional article, and
- generating a second set of two-dimensional light-patterns obtained from said first set of two-dimensional light-patterns by applying a computed pre distortion to compensate for a distortion effect caused by light propagation in said photoresponsive material, and
- projecting said second set of two-dimensional light-patterns into said photoresponsive material and defining a three-dimensional dose distribution, thereby creating a distribution of alterations in said photoresponsive material, and thereby creating said article,
- wherein said second set of two-dimensional light-patterns are projected into said photoresponsive material using a light source emitting light of a wavelength, and wherein said computed pre distortion is obtained by decomposing said first set of two-dimensional light-patterns as a linear superposition of invariant optical modes of said photoresponsive material.
Dependencies are inferred from the claim text.