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Fizeau-type interferometer Overview The National Physical Laboratory (NPL) is the UK's National Measurement Institute and is a world-leading centre of excellence in developing and applying the most accurate measurement standards, science, and technology available. The NPL requirement is for a new Fizeau type interferometer at our Teddington site. The purpose of the new interferometer is to replace an existing system that is no longer reliable with parts/servicing obsolete and cannot enable the capacity improvement...