Abstract

Real time optical correlators are currently limited by the types of spatial light modulator (SLMs) that are available. Limitations of these SLMs in turn restrict the type of filter that can be used in the optical system. One such filter is the binary phase-only filter. This type of filter can be easily encoded on currently available SLMs since the dynamic range required is binary and the number of pixels required is equal to that of the reference image. In addition, because phase modulation is used, a reference recording beam is not needed and the system can be aligned collinearly.

© 1989 Optical Society of America