ACOUSTIC SURFACE WAVE OPTICAL SCANNER
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-30
Xerox Disclosure Journal
An acoustic surface wave travels on the surface of a piezo-electric crystal (from left to right in the drawing) and encounters sequentially N electrodes. Each electrode is connected serially to a small photoconductor, The other side of each photoconductor is connected to a common output elec-trode, When the acoustic surface wave pulse arrives at a photoconductor which is in the dark, its high impedance blocks the passage of the acoustic energy to the common electrode, In the case that the photoconductor is illuminated, the common electrode is excited, Thus, the spatial distribution of the illumination is translated into a temporal output.