A technique for producing speech output in a text-to-speech system is provided. It will recycle standard and legal size paper. The sets of fold minors may also include one or more split mirrors that have mirror components that reflect images from different view volumes to different imagers or different regions of an image field of a single imager. The barrier layers are adapted for resisting exposure of fiducial marks from external air or moisture to reduce the possibility of fiducial marks from being oxidized. Such muon detectors can be assembled in modular surface arrays and such arrays can be positioned on spatial surfaces for differential inspection and detection of muons transiting through and emanating from objects placed within the inspection space. Also described are materials resulting from the process.