Interferometry Web Resources


Ground-based optical/infrared interferometry has come of age. With six U.S. facilities currently operational and one on the way, interferometers are producing a wide variety of scientific results. While most of these applications presently impact stellar astrophysics, the extragalactic potential has been demonstrated.

The six facilities represented here have to date produced > 100 refereed science publications, with many more papers describing technical developments. This following information is a representative sampling of the interferometry science currently being done in the U.S. Our goal is to increase awareness within the astronomy community of what interferometry can do for you.

As we approach the next decadal review, it is clear to us that the accomplishments to date of interferometry are significant and argue strongly for further exploitation of our instruments and continued development of the field with the eventual goal of building a next-generation facility with sensitivity and resolution far surpassing that currently available. As a supplement to materials available from our projects, we encourage you to read the report from a workshop Future Directions for Interferometry held in Tucson during November 13 – 15, 2006.

Additional information regarding interferometry in the U.S. and around the world can be found in the Optical Long-Baseline Interferometry Newsletter (OLBIN) .

Resource Links

Ground - Based Interferometry in the U.S. - currently active



Navy Prototype OpticalInterferometer (NPOI)


The LBTI Interferometer


Magdalena Ridge Observatory Interferometer (MROI)


Ground - Based Interferometry in the U.S. - currently closed

Infrared Spatial
Interferometer (ISI

Keck Interferometer (KI)

Ground - Based Interferometry in the U.S. - permanently closed

Palomar Testbed Interferometer (PTI)