Newport 561 Series Linear Stages feature stainless steel construction for superior long-term stability, with thermally matched, hardened steel crossed roller bearings for unsurpassed performance. The crossed roller bearings and precision-manufactured bearing reference surfaces provide exceptionally straight linear travel, with angular deviation better than 100 µrad about any axis. We measure each stage on a six-axis interferometer to ensure performance.The Newport 561 Series Stages have been specifically designed for precision fiber alignment. A top-mounted rail permits precise and secure attachment of an array of fiber and device holders. A tilt platform can be attached for two-axis tip/tilt alignment of fibers to devices. And a goniometer is available to provide rotation about the fiber axis. With up to six degrees of freedom, high-performance ULTRAlign stages offer a superior fiber optic alignment solution.