Coherence-based Hybrid Optical/Computational Approaches to Three-dimensional Incoherent Imaging

摘要

Computation in incoherent imaging has typically relied almost completely on the optical system, leaving little work for the sensor. Lens-based imagers only work for sources with a limited range of depth. For imaging volume sources, a lensless optical system in conjunction with digital data synthesis may perform better. In particular, measuring the coherence of the field with a Rotational Shearing Interferometer (RSI) [1-3] can provide superior performance over a large range of depth, because a depth-invariant representation of the field can be prepared optically for electronic sensing and computation. We compare lens and coherence based imagers and demonstrate three-dimensional reconstruction of a volume source using RSI sampled coherence and subsequent digital computation.