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Related Experiment Video

Updated: Jun 16, 2026

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Published on: February 8, 2014

Automatic data reduction of certain holographic interferograms.

M J Landry, C M Wise

|February 4, 2010

Summary

This summary is machine-generated.

This study introduces an automated holographic interferometry technique for measuring rigid body translation. The method accurately verified micro-displacements on an aluminum object, showing potential for 3D applications.

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Last Updated: Jun 16, 2026

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Area of Science:

Optical Metrology
Mechanical Engineering
Holography

Background:

Accurate measurement of rigid body displacement is crucial in engineering.
Traditional methods can be time-consuming or lack precision for micro-displacements.

Purpose of the Study:

To develop and validate an automated technique using holographic interferometry for precise translation measurement.
To assess the accuracy and applicability of the method for diffusely reflecting objects.

Main Methods:

Digitizing photographs of a double-exposed hologram's virtual image.
Processing data using a CDC 6600 computer to count fringe shifts over image points.
Varying viewing direction to create displacement contours with 0.0368 cm surface resolution.

Main Results:

Successfully verified a 6.35-microm linear displacement of a 3.68-cm diameter aluminum object.
Achieved an error of less than or equal to 4.3% across the entire object surface.
Demonstrated the feasibility of contour generation based on fringe movement.

Conclusions:

The automated holographic interferometry technique provides accurate displacement measurements.
The method shows promise for extension to the analysis of three-dimensional objects.
This technique offers a precise and potentially automated solution for metrology challenges.