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Updated: Apr 27, 2026
11:59
High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
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Holographic and time-resolving ability of pulse-pair two-dimensional velocity interferometry
David J Erskine1, R F Smith1, C A Bolme2
1Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
The Review of Scientific Instruments
|July 3, 2014
Summary
This study reveals new holographic capabilities of a 2D-velocity interferometer system for any reflector (VISAR). The instrument can now refocus blurred features like cracks and create high-resolution, multi-frame movies of ultrafast target behavior.
Area of Science:
- Shock physics
- Optical interferometry
- Holography
Background:
- Traditional velocity interferometers measure target motion at limited points.
- A recent 2D-velocity interferometer system for any reflector (VISAR) uses ultrashort pulses.
Purpose of the Study:
- To explore novel holographic applications of the 2D-VISAR.
- To enhance the analysis of dynamic events in shock physics experiments.
Main Methods:
- Treating the 2D-VISAR output as a hologram.
- Applying Fourier processing to out-of-focus data to refocus features.
- Analyzing main and conjugate images for temporal information.
Main Results:
- Successfully refocused blurred features like cracks using holographic principles.
- Demonstrated the ability to generate two-frame movies with sub-nanosecond periods.
- Showcased high spatial resolution for studying microscopic 3D behavior.
Conclusions:
- The 2D-VISAR, when treated as a hologram, offers advanced capabilities for shock physics.
- This technique overcomes depth-of-field limitations and enables high-resolution, ultrafast imaging.
- Potential applications include detailed studies of shocked materials like silicon.
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