Latent image volumetric additive manufacturing

Rackson, Charles M.; Toombs, Joseph T.; De Beer, Martin P.; Cook, Caitlyn C.; Shusteff, Maxim; Taylor, Hayden K.; McLeod, Robert R.

doi:10.1364/ol.449220

Title: Latent image volumetric additive manufacturing

Journal Article · 28 February 2022 · Optics Letters

DOI: https://doi.org/10.1364/ol.449220 · OSTI ID:1884649

Rackson, Charles M. ^[1]; Toombs, Joseph T. ^[2]; De Beer, Martin P. ^[3];

^[3]; Shusteff, Maxim ^[3];

^[2]; McLeod, Robert R. ^[1]

University of Colorado, Boulder, CO (United States)
University of California, Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

We report volumetric additive manufacturing (VAM) enables rapid printing into a wide range of materials, offering significant advantages over other printing technologies, with a lack of inherent layering of particular note. However, VAM suffers from striations, similar in appearance to layers, and similarly limiting applications due to mechanical and refractive index inhomogeneity, surface roughness, etc. We hypothesize that these striations are caused by a self-written waveguide effect, driven by the gelation material nonlinearity upon which VAM relies, and that they are not a direct recording of non-uniform patterning beams. We demonstrate a simple and effective method of mitigating striations via a uniform optical exposure added to the end of any VAM printing process. We show this step to additionally shorten the period from initial gelation to print completion, mitigating the problem of partially gelled parts sinking before print completion, and expanding the range of resins printable in any VAM printer.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1884649

Report Number(s):: LLNL-JRNL-828179; 1043697

Journal Information:: Optics Letters, Journal Name: Optics Letters Journal Issue: 5 Vol. 47; ISSN 0146-9592

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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