Papers & References

Volumetric fabrication without lenses: a world-first demonstration

PLUTO / PLUTO-2 Spatial Light Modulators
Materials Processing / Optical Fabrication
Published on:
Authors: Andreas Erik Gejl Madsen and Jesper Glückstad
Abstract:

We report the first successful fabrication of three-dimensional models using our fully lensless holographic volumetric additive manufacturing (HoloVAM) platform. In this configuration, tomographic light fields are generated directly from a phase-only spatial light modulator (SLM) and delivered into a rotating vial of photopolymer without any imaging optics, relays, or index-matching bath. Building on the HoloTile framework for tiled Fourier holography and point-spread function (PSF) shaping, the system creates volumetric dose distributions with high photon efficiency and well-controlled axial propagation. Using a simple acrylate resin and a minimal optical train, we demonstrate reproducible fabrication of recognizable, centimeter-scale geometries in under 30 seconds. These results establish lensless HoloVAM as a practical and mechanically minimal route to volumetric fabrication, opening a pathway toward compact and application-flexible VAM systems.

Restricted Access

Publication: SPIE. Digital Library
Issue/Year: Proceedings Volume 13884, Laser 3D Manufacturing XIII; 1388405 (2026)
DOI: 10.1117/12.3080942
Link: https://doi.org/10.1117/12.3080942
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