Abstract

Computer simulations of optical correlations have shown that binary phase-only filters (BPOF) produce large narrow correlation peaks with good target discriminations, high optical efficiency, and virtually no sidelobes. A 256- × 256-element BPOF was fabricated in etched quartz from the binarized phase of the Fourier transform of an input image. The filter was fabricated by reactive ion etching techniques in a VLSI foundry. Initial experimental results produced an intense narrow correlation peak 6.2 times higher than the secondary peak with the full width at half-maximum corresponding to three pixels. Additional experimental data are presented and compared to computer simulations.

© 1988 Optical Society of America