TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: In the system (S1), the radiation directing device: includes at least one of a mirror (16) or a refractor; is rotatable about an axis to facilitate the selective positioning of the radiation directing device, where the selective positioning of the radiation directing device includes at least one of linear or angular displacement of the radiation directing device; includes many mirrors, where each of the mirrors individually selectively positionable to direct the radiation beam in many desired directions; and is a digital micromirror device including many micromirrors arranged in an array, where each of the micromirrors has an average width of up to 20 mu m and each is rotatable between 12 degrees or -12 degrees . The system (S1) further comprises a mask (20) disposed between the radiation source and the radiation directing device, where the mask has many radiation-transparent apertures for providing a desired radiation-cured structure (4). In the system (S1): the radiation source includes a first radiation source and a second radiation source, where the first radiation source is disposed on a first side of the radiation sensitive material, the second radiation source is disposed on a second side of the radiation sensitive material, and the radiation directing device is disposed between the first and second radiation sources and is selectively positionable to direct the radiation beams from either of the first radiation source and the second radiation source; the mirrors are arranged in an array disposed above the radiation sensitive material; the radiation source is a pulsable radiation source that facilitates a pulsing of the radiation beam when the radiation directing device is positioned; and a sensor determines if an angle of a radiation-cured structure is within a desired tolerance, where the radiation directing device is repositioned in response to the sensor determining that the radiation-cured structure is not within the desired tolerance. In the system (S2): the digital micromirror device is disposed adjacent the radiation sensitive material and each of the micromirrors is individually selectively positionable to direct one of the first radiation beam and the second radiation beam in a desired direction and to expose the radiation sensitive material to one of the first radiation beam and the second radiation beam; and each of the micromirrors is positioned by electrostatic attraction.