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System and method for computed axial lithography (CAL) for 3D additive manufacturing

Patent ·
OSTI ID:2542812
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In one aspect the present disclosure relates to a system for forming a three dimensional (3D) object from a volume of photo-responsive material contained within a material container. A plurality of optical projection subsystems are adapted to be arranged at least partially circumferentially around a material container containing the volume of photo-responsive material, and are controlled by a controller. The optical projection subsystems direct optical projections at a plurality of angles θ through the volume of photo-responsive material. The optical projections are further directed about a z axis extending through the volume of photo-responsive material. The plurality of optical subsystems are further controlled by the controller to provide each of the optical projections with a calculated three-dimensional intensity distribution acting over a fixed temporal exposure period, which is sufficient to at least one of cure or remove selected portions of the volume of photo-responsive material, and leave other portions unmodified, to form a desired 3D part.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA); The Regents of the University of California (Oakland, CA)
Patent Number(s):
12,138,863
Application Number:
17/704,072
OSTI ID:
2542812
Country of Publication:
United States
Language:
English

References (8)

Ultralight Metallic Microlattices journal November 2011
Methods of image reconstruction from projections applied to conformation radiotherapy journal October 1990
Continuous liquid interface production of 3D objects journal March 2015
Near-eye light field displays journal November 2013
Numerical Transforms journal May 1990
Five beam holographic lithography for simultaneous fabrication of three dimensional photonic crystal templates and line defects using phase tunable diffractive optical element journal January 2009
Modeling of Oxygen-Inhibited Free Radical Photopolymerization in a PDMS Microfluidic Device journal November 2008
Strip Integration in Radio Astronomy journal January 1956

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