Page Sized a-Si:H 2-Dimensional Imaging Arrays
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PAGE SIZED A-SI:H 2-DIMENSIONAL IMAGING ARRAYS R.A.STREET, R WEISFIELD, S.NELSON, P.NYLEN*and X.D.WU Xerox Palo Alto Research Center, Palo Alto, CA 94304 *University of Stockholm, Sweden ABSTRACT The first page-sized a-Si:H sensor array intended for use as a contact imager is described. The array collects light very efficiently, making it well suited to high speed document input and medical x-ray imaging (by the addition of a phosphor). The array structure, control electronics and imaging properties are discussed. Data is presented from a 13" diagonal array with 512x560 pixels of size 0.45 mm, although the technology is capable of higher resolution. The image is read-out using 8 ICs containing 64 voltage sensitive amplifiers. The intrinsic dynamic range of the imaging array is about 105, but is limited to
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