Methods and apparatus for tomographic additive manufacturing with a spatially coherent light source

A method of fabricating a three-dimensional article comprises providing a spatially coherent light source (101, 201), generating from said light source (101, 201), patterns of light based on computed tomographic projections of said three-dimensional article, and projecting said patterns of light into a photoresponsive medium, whereby the projecting is configured to define a three- dimensional dose distribution, thereby locally altering the phase of the photoresponsive medium and creating the article.