Keysight formerly Agilent T&M 10556A

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This item is an HP 10556A Retroreflector in the large size (2 square) mounting format found in the earlier Hewlett-Packard Laser Interferometer Distance Measurment Apparatus. There are four countersunk holes in a 1.4 face-centered pattern. The holes are countersunk on both sides of the mounting flange. The outside set of countersinks are used when attaching the retroreflector to one of the 105xx series of interferometers. The inside set of countersinks are used to secure the corner cube to the special carrier with post (HP part number 10550B).

These components have been removed from various fixtures. They meet our requirements for first quality used interferometer components. All optical surfaces are free of blemishes and there are no gouges or distortions in any of the parts that would in any way impede accuracy of measurements. Cosmetically these components appear only lightly used, if not new. Unlike new components, however, no hardware is included. Please note that not all of the reflectors have the plastic sleeve over the cylinder.