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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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Published on: December 30, 2025

Vibration insensitive extended range interference microscopy.

Joshua T Wiersma, James C Wyant

    Applied Optics
    |October 3, 2013
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new phase sensor instrument for highly repeatable measurements, even with laboratory vibrations. The system achieves 1.5 nm RMS repeatability, tolerating significant vibrations and larger step sizes for improved microscopy.

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    Area of Science:

    • Metrology and Measurement Science
    • Optical Instrumentation
    • Surface Characterization

    Background:

    • Laboratory environments often experience vibrations that compromise measurement accuracy.
    • Traditional measurement instruments struggle with environmental noise, limiting precision.
    • High-resolution surface metrology requires robust methods resistant to disturbances.

    Purpose of the Study:

    • To develop and validate a novel instrument for highly repeatable measurements in the presence of vibration.
    • To assess the performance limits of the new instrument regarding vibration amplitude and step size.
    • To demonstrate the potential for enhanced data acquisition in microscopy settings.

    Main Methods:

    • Utilized a simultaneous phase sensor for real-time measurement acquisition.
    • Performed measurements on a 4.5 μm step standard.
    • Acquired vertical scanning data at 400 nm intervals under controlled vibration conditions (40 nm amplitude).

    Main Results:

    • Achieved a repeatability of 1.5 nm RMS in the presence of 40 nm vibration amplitudes.
    • Demonstrated the instrument's capability to tolerate vibration amplitudes up to a quarter wavelength.
    • Showcased the potential to increase data acquisition step size towards the depth of field limit.

    Conclusions:

    • The proposed phase sensor instrument offers high repeatability and vibration tolerance for metrology.
    • The method significantly enhances measurement reliability in noisy laboratory settings.
    • This technology paves the way for more efficient and accurate surface characterization in microscopy.