Sydney University Stellar Interferometer

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The Sydney University Stellar Interferometer ( SUSI ) is an interferometer of the University of Sydney for astronomical observation; It is located in the Paul Wild Observatory, 20 km west of the city Narrabri, Australia. The interferometer has two vacuum tunnels to the light guide, on which sit several siderostats to light input. Via one can thus be performed at a beam combiner with an aperture of 14 cm above the light variable delay lines. By selecting the siderostats the base length between 5 m and 640 m can be varied, resulting in 450 nm wavelength angular resolutions between 0.02 and 0,000.07 seconds of arc.