Tomographic Volumetric Additive Manufacturing (TVAM) allows printing of mesoscopic objects within seconds or minutes. Tomographic patterns are illuminated onto a rotating glass vial which contains a photosensitive resin. Current pattern optimization is based on a ray optical assumption which ultimately leads to limited resolution around $20μ\textrm{m}$ and varying throughout the volume of the 3D object. In this work, we introduce a rigorous wave-based optical amplitude optimization scheme for TVAM which shows that high-resolution printing is theoretically possible over the full volume. The wave optical optimization approach is based on an efficient angular spectrum method of plane waves with custom written memory efficient gradients and allows for optimization of realistic volumes for TVAM such as $(100μ\textrm{m})^3$ or $(10\textrm{mm})^3$ with $550^3$ voxels and 600 angles. Our simulations show that ray-optics start to produce artifacts when the desired features are $20μ\textrm{m}$ and below and more importantly, the amplitude modulated TVAM can reach micrometer features when optimizing the patterns using a full wave model.
Overcoming Scattering in High-Cell-Density Tomographic Volumetric Bioprinting Using Computational Light Optimization
Laboratory of Applied Photonics Devices, School of Engineering, École Polytechnique Fédérale de Lausanne（洛桑联邦理工学院工程学院应用光子器件实验室）；Dipartimento di Ingegneria Meccanica e Aerospaziale (DIMEAS), Politecnico di Torino（都灵理工大学机械与航空航天工程系）
High-resolution tomographic reconstruction of optical absorbance through scattering media using neural fields
School of Information Science and Technology, ShanghaiTech University（上海科技大学信息科学与技术学院）；School of Physical Science and Technology, ShanghaiTech University（上海科技大学物理科学与技术学院）；Institute of Mathematical Science, ShanghaiTech University（上海科技大学数学科学研究所）；School of Mathematics, University of Birmingham（伯明翰大学数学学院）
