Amorphous silicon image sensor arrays have opened up new opportunities in high speed scanning and diagnostic x-ray imaging, with interesting parallels to the early history of xerography. Based on the technology for fabricating flat panel displays, present arrays made at Xerox PARC have 3 million sensors on a 8"X10" glass substrate. We will discuss the resolution and dynamic range required for high speed document scanning and various medical imaging modalities, as well as the electronic systems needed to operate the imagers.

To mark the centennial of the discovery of the x-ray, we will discuss the opportunities in medical imaging. The potential to revolutionize this business is based on the access to digital image processing and information networks. These are also "green" products that do not involve wet processing of photographic films.

If the gods are willing, we will also give a live demonstration.

Jason Wu Graduated from University of Science and Technology of China in 1982 with a Bachelar's Degree in Physics. Jason received his Master's Degree in Astrophysics from The University of Chicago in 1989 and his Ph.D. in Electrical Engineering from Stanford University in 1993. He joined the Electronic Material Laboratory at Xerox PARC since his graduation. His research area includes high-speed document imaging and medical imaging systems using 2-dimensional amorphous silicon sensor arrays. He has about 25 publications.

Bob Street graduated from Cambridge University with a BA in 1968 and PhD in 1971. He was a Post doc at Sheffield University, followed by two years as a visting scientist to the Max Planck Institute in Stuttgart, Germany, before coming to PARC in 1976. Since then, Bob has been in the Electronic Materials lab, and its predecessor the General Sciences lab, where he has spent the majority of his time working on amorphous silicon (including writing a book on the subject). He is a research fellow and area manager of a group called imaging Systems and Materials, with a particular interest in amorphous silicon imaging arrays.

This Forum is OPEN to the public.
Host: Marti Hearst, (415) 812-4742, hearst@parc.xerox.com