Abstract
The precision ball-bearing- or roller-bearing-based stage systems provide large travel range. However, they have difficulties in meeting subnanometre resolution, high tilting stiffness and high straightness of trajectory with a single guiding system. It is always a dream to have a compact single flexure stage to cover a large travel range with very high positioning resolution. Based on an advanced structure design with the laminar overconstrained weak-link technique, we have designed and constructed a two-dimensional linear precision weak-link stage system for nanopositioning of a specimen holder for the linear multilayer Laue lenses test setup at the Advanced Photon Source Sector 26. This system provides subnanometre resolution, coupled with subnanometre metrology at a travel range of several millimetres. The two-dimensional weak-link stage system is designed with high structure stiffness using laminar overconstrained weak-link mechanisms. In this paper we present the preliminary test results of a linear precision weak-link stage system with subcentimetre travel range and subnanometre positioning resolution.
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