Chemical Array Studies.
Research note 1974-1977,
ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA
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The feasibility of developing continuous photoconductive layer arrays for mapping applications was studied. The procedures for preparing both the zinc oxide binder resin, and the undoped sintered cadmium sulfide, continuous photoconductive layers are presented. Special configuration area arrays with large multi-electrodes for beam centering purposes and for diffraction pattern detectors were devised. The mapping applications of the chemical arrays such as position detection, area, and center of mass measurements of uniformly dense-image patterns are described. Both zinc oxide and cadmium sulfide photoconductive layers were used to fabricate one- and two-dimensional arrays. Successful results were obtained for a one-dimensional 10-wire electrode, linear array. The fabrication of area chemical arrays were not successful. To fabricate a workable special configuration area array, more sophisticated methods such as sputtering and vacuum deposition techniques are necessary. A negligible error was obtained for the analysis of chemical arrays as position detection and area measurement. A larger error resulted for the center of mass measurement. Author
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