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Related Experiment Video

Updated: May 31, 2026

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy (iPALM)
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Three-dimensional coordinate measurements using a multiple-pinhole interferometer.

Cheng-Shan Guo1, Ya-Nan Yu, Xin-Ting Zhang

  • 1Physics Department, Shandong Normal University, Jinan 250014, China. guochsh@sdnu.edu.cn

Optics Letters
|June 21, 2011
PubMed
Summary
This summary is machine-generated.

We developed a noncontact method for measuring 3D coordinates using a Y-typed multiple-pinhole interferometer. This technique enables real-time position tracking by analyzing phase values from intensity patterns without complex algorithms.

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Area of Science:

  • Optical Metrology
  • Interferometry
  • 3D Coordinate Measurement

Background:

  • Accurate noncontact 3D coordinate measurement is crucial for various applications.
  • Existing methods may require iterative or phase-shifting algorithms, limiting real-time capabilities.

Purpose of the Study:

  • To propose and demonstrate a novel method for noncontact 3D coordinate measurement.
  • To achieve real-time coordinate determination using a simplified algorithm.

Main Methods:

  • Utilizing a Y-typed multiple-pinhole (MP) plate to create a common-path interferometer.
  • Employing a Fourier transform to directly extract discrete phase values from intensity patterns.
  • Developing an effective algorithm to compute 3D coordinates from these phase values.

Main Results:

  • Experimental feasibility of the proposed noncontact 3D coordinate measurement method was demonstrated.
  • Phase values were successfully extracted directly via Fourier transform, bypassing iterative or phase-shifting techniques.
  • The method shows potential for real-time coordinate measurements.

Conclusions:

  • The Y-typed MP interferometer offers a viable approach for noncontact 3D coordinate measurement.
  • The direct phase extraction method simplifies the process and enables real-time applications.
  • This technique holds promise for position tracking and other dynamic measurement scenarios.