Sub-second volumetric 3D printing by synthesis of holographic light fields
a day ago
- #volumetric additive manufacturing
- #high-resolution fabrication
- #3D printing
- Volumetric additive manufacturing (VAM) is a promising technique for producing complex 3D structures with applications in engineering, photonics, and biology.
- Current VAM methods face a trade-off between resolution and volumetric build rate, limiting efficient production of high-resolution structures.
- Digital Incoherent Synthesis of Holographic Light Fields (DISH) is introduced as a method to generate high-resolution 3D light distributions using multi-angle projections without sample rotation.
- DISH maintains a 19-μm printing resolution across a 1-cm range, enabling high-speed in situ 3D printing of millimeter-scale objects in 0.6 seconds.
- The method is compatible with acrylate materials of varying viscosities and can integrate with fluid channels for mass production of diverse 3D structures.
- DISH uses a rotating periscope and digital micromirror device (DMD) to achieve rapid, high-resolution projections, overcoming limitations of traditional computed axial lithography (CAL).
- An iterative holographic optimization algorithm enhances printing fidelity, enabling uniform resolution beyond the depth of field of the objective lens.
- Experimental validation shows DISH can print intricate structures with high precision, including helical tubes, chains, and complex geometries.
- DISH achieves a volumetric printing rate of 333 mm³/s and a voxel printing rate of 1.25 × 10⁸ voxels/s, outperforming existing 3D printing methods in speed and resolution.
- Potential applications include high-throughput bioprinting, drug screening, micromachines, and photonics.