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Related Experiment Video

Updated: Jun 12, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope
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Extended unambiguous range interferometry.

T C Strand, Y Katzir

    Applied Optics
    |May 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel phase measuring interferometer system that uses fringe contrast to determine absolute phase, eliminating the need for phase unwrapping and improving surface profile accuracy.

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    Area of Science:

    • Optical Metrology
    • Interferometry
    • Surface Profilometry

    Background:

    • Phase measuring interferometers typically measure phase modulo 2pi, requiring phase unwrapping.
    • Surface discontinuities and data dropout can complicate traditional phase measurements.

    Purpose of the Study:

    • To present a new interferometry system for absolute phase determination.
    • To overcome limitations of traditional phase measuring techniques, such as phase unwrapping.

    Main Methods:

    • Utilizing fringe contrast in interference images to determine absolute phase.
    • Implementing a point-by-point phase determination for pipelined processing.
    • Setting up the system on a microscope interferometer for surface profiling.

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    A Multimodal Wide-Field Fourier-Transform Raman Microscope
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    Main Results:

    • Achieved absolute phase determination within the coherence length limits.
    • The system is unaffected by surface discontinuities or data dropout.
    • Generated surface profiles over a 512 x 512 point array with a measurement range of 0.5 to 2.5 micrometers.

    Conclusions:

    • The developed system offers a robust method for absolute phase measurement.
    • Eliminates the need for phase unwrapping, simplifying data processing.
    • Pipelined processing enables efficient surface profile generation.