Research on the Coupled Modulation Transfer Function of the Discrete Sampling System with Hexagonal Fiber-Optic Imaging Bundles

In this study, we developed a numerical model of the coupled modulation transfer function (coupled-MTF) based on discrete sampling system from perspective optical imaging quality evaluation for two-dimensional characteristics hexagonally aligned fiber-optic bundles and CCD image elements. The results show that when spatial frequency input target signal deviates Nyquist by 1%, an increase in number fibers leads to faster convergence oscillation coupled-MTF, coupled-MTF converges stable value reaches 1000 × 1000. deviation is within oscillatory accelerates with increasing deviation. oscillates period wave peak initial position fiber center, theoretical twice diameter. This study produces important guidelines selection fibers, frequency, arranged bundles.