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Interframe-tunable ultrafast differential-displacement holography.

T M Hutchinson1, G Righi1, P M Celliers1

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|September 18, 2024
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Summary
This summary is machine-generated.

A new digital holographic microscopy diagnostic precisely measures object topography and velocity up to km/s speeds. This advanced technique offers adjustable temporal sensitivity for detailed analysis.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Metrology

Background:

  • Quantitative phase imaging is crucial for non-contact metrology.
  • High-speed object characterization demands advanced imaging techniques.
  • Digital holographic microscopy (DHM) offers high-resolution 3D surface profiling.

Purpose of the Study:

  • To present a novel digital holographic microscopy diagnostic.
  • To enable simultaneous quantification of topography and velocity.
  • To achieve adjustable temporal sensitivity for dynamic measurements.

Main Methods:

  • Spatially multiplexing a double pulse reflected from a target.
  • Utilizing reference beams with precisely known temporal separation.
  • Implementing digital holographic microscopy principles for data acquisition and processing.

Main Results:

  • Demonstrated quantification of topography for high-speed objects.
  • Achieved velocity measurement of objects moving at km/s speeds.
  • Verified adjustable temporal sensitivity for dynamic analysis.

Conclusions:

  • The developed DHM diagnostic is capable of high-precision, high-speed metrology.
  • This technique advances the characterization of dynamic events and fast-moving targets.
  • Offers a versatile tool for scientific and industrial applications requiring detailed object analysis.