A MICRO-SCANNING ARRAY SYSTEM
Original Publication Date: 1983-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A document scanning technique utilizing a linear lens scanning array is shown in Figure 1. A gradient index lens array 2 is positioned between an object olane 4 and an image plane 6. An object 8 lying in plane 4 is to be projected onto image plane 6. The object is scanned by pivoting array 2 about an axis 10 which passes through the center of the array creating a displacement D in image space, D being equal to @TC. To a first order approximation, the image plane 6 remains parallel to the object plane 4 and, if the array is pivoted at its center, object and image conjugates remain equal with rotation through angle fl. One application of the technique is shown in Figure 2 wherein the image plane 6 is the tangential surface of a photoreceptor drum 12. In order to compensate for small errors in the drum surface motion, a control circuit consisting of an encoder (not shown but located on the drum shaft) feeds positional data to a piezo-electric transducer bearing 14 on array 2. The drum displacement is translated into a corrective pivoting motion of the array.