Abstract: A means of converting between images, or other whole wavefronts, and separated, composing segments of this whole. The purpose is to allow many, less capable sensors or generators to be used in place of a single, more capable one. Applications can be found in the design of scanners, cameras, projectors, and audio speakers. The invention consists of a single focusing means (20), one or more reflective means (24), and a plurality of sensors or generators (90 and 92). Representative designs are shown with the following characteristics:One dimensional tessellation using simple mirrors.Two dimensional tessellation using glass with mirrored sections.Extensibility to support an arbitrary number of composing segments.Sensing or generating elements placed together on the same plane.Inconsequential or easily corrected image distortion.Easy and inexpensive manufacture.Easy alignment.