On-the-fly 3D metrology of volumetric additive manufacturing

Additive manufacturing techniques are revolutionizing product development by enabling fast turnaround from design to fabrication. However, the throughput of rapid prototyping pipeline remains constrained print optimization, requiring multiple iterations fabrication and ex-situ metrology. Despite need for a suitable technology, robust in-situ shape measurement an entire is not currently available with any additive modality. Here, we address this shortcoming demonstrating fully simultaneous 3D metrology printing. We exploit dramatic increase in light scattering photoresin during gelation real-time imaging prints tomographic volumetric manufacturing. Tomographic density build volume yields quantitative, artifact-free + time models cured objects that accurate below 1% size print. By integrating into printing process, our work paves way next-generation defect detection correction.