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Updated: Jul 6, 2026
06:56
Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
Published on: May 23, 2017
Interference between stretched and original pulses.
M Werdiger1, S Eliezer, B Arad
1Plasma Physics Department, Soreq Nuclear Research Center, Yavne 81800, Israel.
Applied Optics
|March 18, 2008
Summary
A novel off-axis holographic method uses two laser pulses for high-speed imaging. This technique achieves picosecond resolution and a large depth of field, ideal for capturing fast-moving objects.
Area of Science:
- Optics and Photonics
- High-Speed Imaging
- Holography
Background:
- Traditional holographic methods struggle with imaging fast-moving objects due to limited temporal resolution.
- Achieving both high temporal resolution and a large depth of field simultaneously presents a significant challenge in optical recording.
Purpose of the Study:
- To propose and demonstrate an off-axis holographic recording method for capturing fast-moving objects.
- To achieve a time resolution of several picoseconds and a large depth of field in holographic imaging.
- To investigate the interference of laser pulses with different durations for enhanced holographic recording.
Main Methods:
- Utilizing an off-axis holographic setup.
- Interfering two mutually coherent laser pulses: an original 20 ps pulse and a stretched 60 ps pulse.
- Demonstrating interference patterns at wavelengths of 1.064 microm and 0.532 microm.
Main Results:
- The proposed method successfully records holographic interference patterns.
- The short pulse (20 ps) dictates the temporal resolution, achieving picosecond-level accuracy.
- The stretched pulse (60 ps) effectively increases the depth of field of the recorded holograms.
Conclusions:
- The developed off-axis holographic method offers a viable solution for high-speed imaging of dynamic events.
- The dual-pulse interference technique successfully balances high time resolution with an extended depth of field.
- This technique demonstrates potential for applications requiring precise, large-scale dynamic scene capture.
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