An additive manufacturing apparatus

An additive manufacturing apparatus for additively manufacturing a three-dimensional object by solidifying a build material by electromagnetic radiation at a specific wavelength, particularly by photocuring a photocurable resin which can be cured at a specific wavelength range, the apparatus comprising:

• a container device, the container device delimiting a receiving volume for receiving a build material which can be solidified by electromagnetic radiation at a specific wavelength, particularly photocurable resin which can be cured at a specific wavelength range,
• at least one first radiation device configured to generate one or more polarized light images having a first wavelength and a first polarization, each of the one or more polarized light images corresponding to at least a part of a cross-section of a three-dimensional object to be additively manufactured with the apparatus, the first wavelength corresponding to the specific wavelength of the build material, wherein the at least one first radiation device comprises at least one light source configured to generate and emit light of the first wavelength and the first polarization,
• at least one second radiation device configured to simultaneously generate one or more directed polarized light beams having a second wavelength and a second polarization different from the first polarization, the second wavelength corresponding to the specific wavelength of the build material, each of the one or more directed polarized light beams corresponding to at least a part of a cross-section of a three-dimensional object to be additively manufactured with the apparatus, wherein the at least one second radiation device comprises at least one light source configured to generate and emit light of the second wavelength and the second polarization;
• or
• at least one first radiation device configured to generate one or more polarized light images having a first wavelength and a first polarization, each of the one or more polarized light images corresponding to at least a part of a cross-section of a three-dimensional object to be additively manufactured with the apparatus, the first wavelength corresponding to the specific wavelength of the build material, wherein the at least one first radiation device comprises at least one light source configured to generate and emit light of the first wavelength and the first polarization,
• at least one other first radiation device configured to simultaneously generate one or more polarized light images having a second wavelength and a second polarization different from the first polarization, the second wavelength corresponding to the specific wavelength of the build material, each of the one or more polarized light images corresponding to at least a part of a cross-section of a three-dimensional object to be additively manufactured with the apparatus, wherein the at least one other first radiation device comprises at least one light source configured to generate and emit light of the second wavelength and the second polarization;
• or
• at least one second radiation device configured to generate one or more directed polarized beams having a first wavelength and a first polarization, each of the one or more directed polarized light beams corresponding to at least a part of a cross-section of a three-dimensional object to be additively manufactured with the apparatus, the first wavelength corresponding to the specific wavelength of the build material, wherein the at least one second radiation device comprises at least one light source configured to generate and emit light of the first wavelength and the first polarization,
• at least one other second radiation device configured to simultaneously generate one or more directed polarized light beams having a second wavelength and a second polarization different from the first polarization, the second wavelength corresponding to the specific wavelength of the build material, each of the one or more directed polarized light beams corresponding to at least a part of a cross-section of a three-dimensional object to be additively manufactured with the apparatus, wherein the at least one other second radiation device comprises at least one light source configured to generate and emit light of the second wavelength and the second polarization.