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Proceedings Paper

Imaging with page-sized A-Si:H two-dimensional sensor arrays
Author(s): Jason Xiao-Dong Wu; Robert A. Street; Richard L. Weisfield; Steven E. Nelson; Michael Y. Young; M. Nguyen; Per Nylen
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Paper Abstract

We present a document imaging system using page-sized amorphous silicon 2D sensor arrays. Two arrays of approximately 8' X 10' in area are used. One has 512 X 560 pixels and the other one has 1536 X 1920 pixels. The scanner can operate in either a contact imaging mode or a projection mode. The system has a signal-to-noise ratio of 1000, limited by the noise in the readout amplifier. Using sequential flash lamp exposures with appropriate color filters, one can achieve color imaging of a document with a perfect registration. In this paper, we describe sensor structure, electrical properties, and system design of the imager. We discuss the potential of the amorphous silicon sensor array as an electronic color document input device. The high sensitivity of the array allows high-speed scanning of a document and medical x-ray imaging (with a phosphor layer).

Paper Details

Date Published: 1 May 1994
PDF: 11 pages
Proc. SPIE 2172, Charge-Coupled Devices and Solid State Optical Sensors IV, (1 May 1994); doi: 10.1117/12.172758
Show Author Affiliations
Jason Xiao-Dong Wu, Xerox Palo Alto Research Ctr. (United States)
Robert A. Street, Xerox Palo Alto Research Ctr. (United States)
Richard L. Weisfield, Xerox Palo Alto Research Ctr. (United States)
Steven E. Nelson, Xerox Palo Alto Research Ctr. (United States)
Michael Y. Young, Xerox Palo Alto Research Ctr. (United States)
M. Nguyen, Xerox Palo Alto Research Ctr. (United States)
Per Nylen, Univ. of Stockholm (United States)


Published in SPIE Proceedings Vol. 2172:
Charge-Coupled Devices and Solid State Optical Sensors IV
Morley M. Blouke, Editor(s)

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