Methods, devices, and systems for acquiring three-dimensional (3D) measurements of object surfaces are provided. In one aspect, an optical scanning system includes: a first digital illuminator configured to illuminate a sequence of first patterns along a first optical path directed upon an object surface, a second digital illuminator configured to illuminate at least one sequence of second patterns along a second optical path onto the object surface, and at least one digital camera disposed facing the object surface and configured to capture both images of the sequence of first patterns reflected from the object surface and images of the at least one sequence of second patterns reflected from the object surface to generate 3D reconstruction data of the object surface. The second optical path is different from the first optical path, and the at least one sequence of second patterns is different from the sequence of first patterns.