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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.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...

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Related Experiment Video

Updated: Jun 22, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

Multi-frequency and multiple phase-shift sinusoidal fringe projection for 3D profilometry.

E Li, X Peng, J Xi

    Optics Express
    |June 5, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel laser fringe projection system capable of dynamic 3D profiling. The setup allows for electronic control over fringe patterns, enabling high-speed adjustments for advanced applications.

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • 3D Imaging

    Background:

    • Traditional fringe projection methods often lack dynamic control over pattern parameters.
    • Achieving high-speed, electronically controlled fringe patterns is crucial for advanced 3D profiling applications.

    Purpose of the Study:

    • To develop and demonstrate a laser fringe projection setup with electronically controllable multiple frequencies and phase shifts.
    • To enable dynamic 3D profiling through high-speed switching of fringe pattern characteristics.

    Main Methods:

    • Utilizing the interference of two frequency-modulated laser beams generated by acousto-optic modulators (AOMs).
    • Driving AOMs with radio frequency (RF) signals of identical frequency but variable phase delay.
    • Electronically controlling fringe spatial frequency and phase shift by adjusting RF frequency and phase delay.

    Main Results:

    • Successful generation of stationary fringe patterns with sinusoidal intensity distributions.
    • Demonstrated electronic control over fringe spatial frequency and phase shift.
    • Achieved high-speed switching between different fringe frequencies and phase shifts.

    Conclusions:

    • The developed laser fringe projection system offers precise and dynamic control over fringe patterns.
    • This technology facilitates high-speed dynamic 3D profiling, opening possibilities for advanced metrology and imaging.