CPC B29C 64/268 (2017.08) [B23K 26/34 (2013.01); B29C 64/135 (2017.08); B29C 64/393 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] | 4 Claims |
1. A three-dimensional printer resin curing system consisting of:
a laser that emits a laser beam;
a shutter in communication with the laser that selectively allows the laser beam to pass;
at least one pair of Risley elements in communication with the laser beam and shutter that direct the laser beam onto a current print layer;
a controller in communication with the at least one pair of Risley elements that independently rotates each Risley element to spatially reduce the laser beam using a polarization grating, and to position the laser beam onto a pre-defined location of a selected spatial size of a current print layer;
more than one holder that respectively receive each one of the at least one pair of Risley-elements for independent rotation, the holders being in communication with the controller;
more than one rotation actuator that are respectively engaged to each holder for rotation; and
a memory in communication with the controller, the memory containing an application and a lookup table, wherein the controller comprises a processor that executes the application to:
monitor current rotation positions respectively of the at least one pair of Risley elements reported by the respective rotation actuators;
determine the pre-defined location on the current print layer that corresponds to a selected size of a pattern of the current print layer;
determine a change in the rotation positions of each Risley element specified in the lookup table based on the current rotation positions and the two-dimensional position of the light beam; and
actuate each rotation actuator to effect the change in the rotation positions, wherein the at least one pair of Risley element comprises a second pair of Risley elements to further adjust the selected spatial size of the current print layer, wherein the at least one pair of Risley element comprises a second pair of annular Risley elements to further adjust the position of the laser beam onto the selected spatial size of an outer annular portion of the current print layer.
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