A method for forming at least one three-dimensional article through successive fusion of parts of a powder bed, the method comprising the steps of: providing a model of the at least one three dimensional article; applying a first powder layer on a first build platform and on a second build platform; directing a deflectable laser beam from a laser beam source arranged in a first position to cause the first powder layer to fuse in a first selected locations on the first build platform according to the model; at least one of rotating or tilting the laser beam source a predetermined angle to a second position; and directing the deflectable laser beam from the laser beam source in the second position to cause the first powder layer to fuse in a second selected locations on the second build platform according to the model.

An imaging device for an additive manufacturing system is provided. The additive manufacturing system includes a material. The imaging device includes a high resolution imaging bar including at least one detector array, and an imaging element positioned between the at least one detector array and the material. The high resolution imaging bar is displaced from the material along a first direction and extends along a second direction. The high resolution imaging bar is configured to generate an image of a build layer within the material.

An imaging device for an additive manufacturing system is provided. The additive manufacturing system includes a material. The imaging device includes a high resolution imaging bar including at least one detector array, and an imaging element positioned between the at least one detector array and the material. The high resolution imaging bar is displaced from the material along a first direction and extends along a second direction. The high resolution imaging bar is configured to generate an image of a build layer within the material.