US 12,138,863 B2
System and method for computed axial lithography (CAL) for 3D additive manufacturing
Brett Kelly, Berkeley, CA (US); Robert Matthew Panas, Dublin, CA (US); Maxim Shusteff, Piedmont, CA (US); Christopher Spadaccini, Oakland, CA (US); Hayden Taylor, Berkeley, CA (US); and Indrasen Bhattacharya, Berkeley, CA (US)
Assigned to Lawrence Livermore National Security, LLC, Livermore, CA (US); and The Regents Of The University Of California, Oakland, CA (US)
Filed by Lawrence Livermore National Security, LLC, Livermore, CA (US); and The Regents of the University of California, Oakland, CA (US)
Filed on Mar. 25, 2022, as Appl. No. 17/704,072.
Application 17/704,072 is a division of application No. 16/691,053, filed on Nov. 21, 2019, granted, now 11,370,173.
Application 16/691,053 is a division of application No. 15/593,947, filed on May 12, 2017, granted, now 10,647,061, issued on May 12, 2020.
Prior Publication US 2022/0212414 A1, Jul. 7, 2022
Int. Cl. B29C 64/393 (2017.01); B29C 64/129 (2017.01); B29C 64/232 (2017.01); B29C 64/241 (2017.01); B29C 64/245 (2017.01); B29C 64/264 (2017.01); B29C 64/277 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/393 (2017.08) [B29C 64/129 (2017.08); B29C 64/232 (2017.08); B29C 64/241 (2017.08); B29C 64/245 (2017.08); B29C 64/264 (2017.08); B29C 64/277 (2017.08); B33Y 50/02 (2014.12); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 24 Claims
OG exemplary drawing
 
1. A system for forming a three dimensional (3D) object from a volume of photo-responsive material contained within a material container, the system comprising:
a controller;
a plurality of optical projection subsystems adapted to be arranged circumferentially around a material container containing the volume of photo-responsive material, and in communication with the controller;
the plurality of optical projection subsystems controlled by the controller to direct optical projections at a plurality of angles θ through the volume of photo-responsive material, the optical projections further being directed about a z axis extending through the volume of photo-responsive material; and
the plurality of optical subsystems further being 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 cure one or more selected portions of the volume of photo-responsive material, and leave other portions unmodified, to form the 3D object.