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Related Concept Videos

Fischer Projections02:18

Fischer Projections

Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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Three-dimensional profiling using the Fourier transform method with a hexagonal grating projection.

Koichi Iwata1, Fuminori Kusunoki, Kousuke Moriwaki

  • 1Technology Research Institute of Osaka Prefecture, Osaka, Japan. k-iwata@tri.pref.osaka.jp

Applied Optics
|April 22, 2008
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Summary

This study introduces a novel 3D profilometry technique using a hexagonal pattern for accurate object measurement. The method achieves high-resolution 3D surface profiling with a height resolution of approximately +/- 1 mm.

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Computer Vision

Background:

  • 3D profilometry is crucial for various applications requiring precise surface measurements.
  • Existing methods often face challenges in accuracy, speed, or complexity.
  • Triangulation-based methods are common but can be improved for one-shot measurements.

Purpose of the Study:

  • To develop an accurate and compact three-dimensional (3D) profilometry system.
  • To enhance measurement precision using a novel hexagonal pattern projection scheme.
  • To validate the system's performance for 3D surface profiling.

Main Methods:

  • Implementation of a triangulation-based 3D profilometry system.
  • Projection of a hexagonal pattern onto the object.
  • Adoption of the Fourier transform method and the method of excess fraction for accurate analysis of one-shot images.
  • Utilizing three grating components inherent in the hexagonal pattern.

Main Results:

  • Successful construction and operation of the 3D profilometry optical system.
  • Demonstrated effectiveness in measuring the 3D profile of a mannequin.
  • Achieved a height resolution of approximately +/- 1 mm.

Conclusions:

  • The proposed hexagonal pattern-based 3D profilometry system offers a viable solution for accurate surface measurements.
  • The integration of Fourier transform and excess fraction methods enables high-precision results from single-shot images.
  • The compact design and good height resolution make this technique suitable for practical applications.