Method and apparatus for processing an optically reactive material

A device for processing an optically reactive material, having:

• a working volume comprising a first side, a second side opposite from the first side, and a third side different from the first side and the second side, wherein the working volume is configured to accommodate a starting material, which is optically reactive and fills the working volume partially or wholly;
• a lighting device, which is configured to provide light of a first wavelength into the first side and at least the second side of the working volume and light of a second wavelength into the third side of the working volume to irradiate onto the working volume;
• and
• a projector, which is configured to project the light of the second wavelength during irradiation onto the working volume filled with the starting material into a first partial volume and a second partial volume of the working volume;
• wherein the lighting device and the projector are further configured to optically process the starting material in the working volume as follows:
• irradiating the first partial volume of the working volume filled with the starting material using the light of the first wavelength, wherein the light of the first wavelength enters the working volume from at least the first side and at least the second side opposite from the first side to thereby create a light plane within the working volume;
• irradiating the first partial volume of the working volume using the light of the second wavelength, wherein the light of the second wavelength is projected into the third side of the working volume by the projector capturing at least the first partial volume wholly or partially;
• irradiating a second partial volume of the working volume filled with the starting material, which is different from the first partial volume, using the light of the first wavelength;
• irradiating the second partial volume of the working volume using the light of the second wavelength, wherein the light of the second wavelength is projected into the working volume by the projector capturing at least the second partial volume wholly or partially;
• and
• repeating the preceding steps for additive manufacturing a three-dimensional object by optical processing of the starting material in the working volume until a volume of the starting material to be processed, which captures the working volume wholly or partially, is optically processed.