Abstract

One of the major challenges with high density holographic data storage is readout of the data, which by necessity is comprised of high resolution features, onto the detector array.¹ With minimum feature size of 10 μm or less being proposed for high data capacity, the optical system resolution requirement is approaching the diffraction limit of available optics. Low f-number, high line resolution, 1:1 magnification, wide field of view optics is extremely expensive, but necessary to image large, high resolution arrays of data from proposed holographic memory devices. Recently, we applied optical phase conjugation in the holographic recording process to correct for Fresnel diffraction and image aberration during readout, eliminating the need for the bulky and expensive optical imaging system.²

© 1996 Optical Society of America