Browse Prior Art Database

ELIMINATION OF MOIRE EFFECTS INTRODUCED BY RECORDING AN INTERPOSITIVE IN MAGNETIC IMAGING PROCESSES

IP.com Disclosure Number: IPCOM000024473D
Original Publication Date: 1980-Oct-31
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal

Abstract

During the creation of a magnetic latent image in magnetic imaging processes, it is desirable to record an interpositive by driving a recording head with a periodic signal. In this manner, a fringing field pattern is produced over extended image areas, thereby facilitating the uniform magnetic forces required for development. When overlaying patterns such as those from halftone photographs are to be recorded, an interfering moire pattern is created. This moire pattern can be reduced or eliminated in recorded interpositives by introducing a controlled amount of noise into the spatial frequency of the recorded magnetization pattern.