Three-dimensional printing apparatus and three-dimensional printing method

A three-dimensional printing apparatus, comprising:

• a container, configured to contain a liquid photosensitive material;
• and
• a projecting structure, configured to provide a variety of molding beams to irradiate the liquid photosensitive material, wherein the variety of molding beams at least comprises a first molding beam with a first wavelength and a second molding beam with a second wavelength, and the first wavelength is different from the second wavelength;
• wherein the projecting structure comprises a light combiner module and a light valve, disposed on transmission paths of the variety of molding beams, wherein the light combiner module is configured to transmit the variety of molding beams toward the light valve in the same direction;
• wherein the wavelength of at least one of the variety of molding beams is less than 400 nm.

A three-dimensional printing apparatus, comprising:

• a container, configured to contain a liquid photosensitive material;
• and
• a projecting structure, configured to provide a variety of molding beams including a first molding beam and a second molding beam for irradiating the liquid photosensitive material to form a plurality of solidified layers;
• wherein the projecting structure comprises a light combiner module, disposed on the transmission paths of the first molding beam and the second molding beam;
• wherein the light combiner module comprises a plurality of dichroic mirrors, an X-shaped light combiner element, or an internal total reflection prism;
• wherein the first molding beam and the second molding beam have mutually different wavelengths, and the wavelengths of the first molding beam and the second molding beam are between 355 nm to 415 nm;
• wherein a light valve is disposed downstream of the light combiner module;
• wherein the light valve comprises a digital micro mirror device, a liquid-crystal-on-silicon panel, or a transmissive liquid crystal panel.