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Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

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Related Experiment Video

Updated: Jun 22, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Three-dimensional profilometry using a Dammann grating.

Jun Zhang1, Changhe Zhou, Xiaoxin Wang

  • 1Information Optics Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Graduate University of the Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China.

Applied Optics
|July 3, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a new 3D profilometry technique using a Dammann grating and cylindrical lens to create bright, high-contrast fringe lines for accurate 3D surface measurements.

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Computer Vision

Background:

  • Three-dimensional (3D) profilometry is crucial for surface measurement.
  • Existing methods may lack brightness, contrast, or efficient compression ratios.

Purpose of the Study:

  • To propose and verify a novel 3D profilometry method using Fourier transform.
  • To leverage a two-dimensional (2D) Dammann grating and cylindrical lens for structured light generation.

Main Methods:

  • Utilizing a 2D Dammann grating to generate a 2D diffractive spot matrix.
  • Employing a cylindrical lens to convert spot matrix into 1D fringe lines.
  • Projecting fringe lines onto an object for 3D surface reconstruction.

Main Results:

  • The projected fringes exhibit high brightness and high contrast.
  • The method demonstrates effective compression ratios.
  • Experimental verification confirms the feasibility of the proposed 3D profilometry.

Conclusions:

  • The developed Dammann grating-based 3D profilometry offers significant advantages.
  • This technique shows high potential for practical applications in surface metrology.