Dual-frame interferometry with enhanced single-shot sensitivity using PIV equipment

Area of Science:

• Optical Physics
• Metrology

Background:

• Interferometry is crucial for precise measurements.
• Existing techniques struggle with sensitivity in noisy environments.

Purpose of the Study:

• To demonstrate and test a novel dual-frame interferometry technique.
• To achieve high single-shot sensitivity in particle image velocimetry (PIV) hardware.

Main Methods:

• Utilized hardware common in particle image velocimetry.
• Implemented a dual-frame interferometry approach.
• Developed a phase correction procedure.

Main Results:

• Demonstrated unprecedented single-shot sensitivity.
• Achieved reliable measurements in noisy backgrounds.
• Identified and corrected a systematic phase error.

Conclusions:

• The novel dual-frame interferometry technique is effective.
• The method shows promise for applications requiring high sensitivity in challenging conditions.
• The provided correction procedure enhances measurement accuracy.