"Version: 20210205"--Title page verso.Includes bibliographical references.1. Nano dimensional standards -- 1.1. Nano dimensional standards -- 1.2. Metrological atomic force microscopes -- 1.3. The guide to the expression of uncertainty in measurement (The GUM, ISO/IEC Guide 98-3:2008) -- 1.4. Summary2. One-dimensional grating -- 2.1. Importance of one-dimensional grating as a nano dimensional s…