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18 results on '"Unit of length"'

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1. A review of state-of-the-art 1D length scale calibration instruments

2. A revised treatment of the influence of the sample support on the measurement of line scales and the consequences for its use to disseminate the unit of length

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3. Method for linear measurements in the nanometre range

4. An ultra-precision interference comparator for dimensional measurements using two tunnelling microscopes as probes

5. X-ray angle interferometry: a practical set-up for calibration in the microrad range with nanorad resolution

6. Absolute measurements of the frequency of an He—Ne/CH4standard over a decade

7. Modernization of Koesters interferometer and high accuracy calibration gauge blocks

8. Traceability of laser frequency/wavelength calibration through the frequency comb at Inmetro

9. Solutions in the CPNSkyrme type model

10. Comparison of the measurement standards of the length unit in the field of roundness deviations measurements

11. Refinement of the Metrological Chain for Calibration of Long-distance Measurement Systems

12. Comparison of the absolute frequencies of He—Ne/CH4lasers with a transportable M101 laser

13. Litre, cubic metre and five baths full

14. Optics, from fundamental knowledge to applications

15. Lasers from the standards laboratory to the factory floor

16. The contributions to science of Friedrich Adolph Nobert

17. Studies in interferometry - II. The construction, testing and use of reflection echelons for the visible and ultra-violet regions

18. The International Definition of the Metre and Its Realization