The Navy Prototype Optical Interferometer (NPOI) is an interferometer operated by the US Naval Observatory, the Naval Research Laboratory and The Lowell Observatory. The facility is located on Anderson Mesa about 15 miles southeast of Flagstaff, Arizona. To date it has produced the highest resolution optical images of any astronomical instrument (this is likely to change when the CHARA array and Magdelena Ridge Observatory Interferometer begin operations). The first astronomical object imaged by NPOI was Mizar.

External links

• The Navy Prototype Optical Interferometer webpage

Interferometers | Telescopes | Multiple aperture telescopes