OPTICAL ANTIALIASING FILTERS BASED ON COMPLEMENTARY GOLAY CODES

An optical filter that has an ideal response for removing aliasing noi se from a sampled imaging system is described. The all-phase filter us es complementary Golay codes to achieve an optimum low-pass transfer f unction with no sidelobes. A computer model shows that the optical sys tem has the expected performance in the ideal case, but degrades somew hat with wavelength variations and image aberrations. An experimental demonstration of the filter shows the optical transfer function perfor mance and the response to imagery with a sampled detector. (C) 1997 Op tical Society of America.