Related Experiment Video
Updated: Jun 14, 2026
07:20
A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
Published on: August 30, 2017
Summary
This study introduces a novel laser speckle interferometry technique for mapping 3-D object surface contours. The method utilizes Fourier filtering of double-exposed specklegrams to accurately determine surface topography.
Area of Science:
- Optical Metrology
- Interferometry
- 3-D Surface Profilometry
Background:
- Accurate 3-D surface contour determination is crucial in fields like manufacturing and quality control.
- Traditional methods can be complex or limited in resolution.
- Laser speckle interferometry offers a non-contact approach for surface analysis.
Purpose of the Study:
- To present a new technique for 3-D object surface contour determination.
- To utilize laser speckle interferometry for enhanced surface mapping.
- To demonstrate the effectiveness of Fourier filtering in contour extraction.
Main Methods:
- Recording a double exposure specklegram of the 3-D object.
- Introducing a small tilt to the object between exposures.
- Applying Fourier filtering to the recorded specklegram to extract surface contours.
Main Results:
- Successful determination of surface contours for 3-D objects.
- Demonstration of the technique's capability in mapping surface topography.
- Validation of Fourier filtering for specklegram analysis.
Conclusions:
- The presented laser speckle interferometry technique provides an effective method for 3-D surface contour determination.
- Fourier filtering of specklegrams is a viable approach for obtaining surface topography.
- This technique offers a promising solution for non-contact 3-D surface measurement.
