3D printing method creates objects in one piece
Taking inspiration from computed tomography, the Computed Axial Lithography (CAL) 3D printing method uses projected photons to illuminate a syrup-like resin, creating a continuously shifting video of projections as the vial rotates. Like a CT scan done in reverse, the projections combine to form a 3D object that is suspended in the resin. Here, a CAL system projects light into a photosensitive resin to produce a component.
With a standard commercial projector and off-the-shelf photosensitive resins, the Computed Axial Lithography method is able to produce 3D objects, all at once, and many times faster than conventional layer-by-layer 3D printing. Using a projector makes the process easier to control than other laser-based volumetric methods, and allows for much broader geometric flexibility, such as easily creating curves and smooth surfaces.