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Wavelength scanning interferometry for measuring transparent films of the fusion targets

Gao, F., Jiang, Xiang, Muhamedsalih, Hussam and Martin, Haydn (2011) Wavelength scanning interferometry for measuring transparent films of the fusion targets. In: 13th International Conference on Metrology and Properties of Engineering Surfaces 2011, 12th - 15th April 2011, Twickenham, UK.

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    Abstract

    Wavelength scanning interferometry is an effective method for the measurement of both engineering surfaces and
    structured surfaces. Currently its main applications in surface metrology are limited primarily to surfaces with reflections
    occurring from the uppermost of the surfaces. When a transparent thin film is measured by wavelength scanning interferometer
    the reflection signals from both top and bottom surfaces of the film will interfere with the reference signal. At the same time
    the reflected signals from these two surfaces will also interfere with each other. Effective separation of the interference signals
    from each other is the key to achieving a successive measurement of the film. By performing an frequency-domain analysis to
    separate and reconstruct these interference signals, the measurement of the top and the bottom surface finishes of the film as
    well as the film thickness map will be achieved. In this paper theoretical analysis of wavelength scanning interferometry for
    transparent film measurement is discussed. Experiments with thin film layers of Parylene N coated on glass slide surface,
    which are provided by the HiPER target fabrication group are studied and analysed.

    Item Type: Conference or Workshop Item (Paper)
    Subjects: Q Science > Q Science (General)
    Q Science > QC Physics
    T Technology > TS Manufactures
    Schools: School of Computing and Engineering
    School of Computing and Engineering > Centre for Precision Technologies > Surface Metrology Group
    Related URLs:
    Depositing User: Feng Gao
    Date Deposited: 25 Aug 2011 10:03
    Last Modified: 26 Jul 2012 15:16
    URI: http://eprints.hud.ac.uk/id/eprint/11326

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