AC FOCUSING SYSTEM FOR AN OPTICAL DISC
Original Publication Date: 1982-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Although marking materials for optical disc applications should exhibit very low reflectivity to maximize light absorbed thereby providing an optimum marking sensitivity, some reflectivity is required if optical focusing with marking radiation is implemented in a writing engine. For many materials such as dyes, existing focusing schemes do not perform adequately because the reflectivity is low.