Nulling Interferometers for Space-based High-Contrast Visible Imaging and Measurement of Exoplanetary Environments

The state of the art in high-contrast imaging systems that have been built for space-based observation, the environment best suited for spectroscopic study of exo-Earths, is the nulling interferometer that was flown on the Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE).