Abstract

A new architecture for optical image correlation using orthogonal data storage volume holography, shown in Fig. 1, has been proposed and demonstrated. Prior approaches to optical image correlation have relied on the multiplication of computer-generated Fourier transforms input via spatial light modulators (SLMs) to obtain the correlation.¹ However, this approach is limited by the approximately 1% throughput of the SLM’s and the time required to download each stored reference image onto the SLM to identify an unknown image, which can be significant for a large set of reference images.

© 1994 Optical Society of America