image: Explanation of the synthetic apertures for visible imaging (SAVI) technique. A source (for example, a laser) illuminates a distant target, and the reflected signal is captured by a camera. The camera system captures all of the light that would enter the desired synthetic aperture. Because phase information cannot be recorded for visible light, post-capture computational phase recovery is needed to create a high-resolution image. This material relates to a paper that appeared in the April 14, 2017 issue of Science Advances, published by AAAS. The paper, by J. Holloway at Rice University in Houston, TX, and colleagues was titled, "SAVI: Synthetic apertures for long-range, subdiffraction-limited visible imaging using Fourier ptychography." view more
Credit: [Credit: Jason Holloway, Rice University]