Increasing image contrast using Golay-like sparse aperture arrays

摘要

An unfortunate consequence of using a sparse aperture optical imaging system is the reduction of mid-spatial frequency contrast. Non-redundant (autocorrelation) sparse aperture systems are capable of achieving high resolution with a small light collection area compared to that of a conventional monolithic aperture with the same resolution. However, boosting the mid-frequency response of these systems is necessary for quality image formation. Our numerical and theoretical results will demonstrate that the judicious introduction of redundancy in both the Golay-9 and Golay-12 arrays can yield considerable increases in mid-band optical power, or image contrast.