Holographic Memory of High Capacity with Synthesized Aperture

Abstract

The role of holographic memory devices for the development of computer technique is growing in importance /1/. But the capacity of holographic memory with random data access and page organization on thin holograms is restricted by dimensions of an optical system /2/. In practice, the diameter of a high-quality lens may hardly exceed 30–40 cm, and hence a limit for the holographic memory capacity is of 10⁸–10⁹ bit. On the other hand, the nonoptic memory on new principles, such as charge coupled devices, magnetic bubbles, and the conventional memory elements on magnetic discs can provide the same and more greater memory volume with sufficiently improved engineering and economical properties.