Video-rate laser Doppler vibrometry by heterodyne holography

TL;DR

This paper demonstrates real-time, video-rate heterodyne holography capable of reconstructing 1 Megapixel holograms at 24 fps using GPU acceleration, enabling wide-field, non-contact vibration measurements.

Contribution

The authors present a novel implementation of heterodyne holography achieving video-rate performance with high-resolution hologram reconstruction.

Findings

Achieved 24 fps reconstruction of 1 Megapixel holograms

Validated real-time vibration amplitude screening

Enabled wide-field, non-contact vibrometry

Abstract

We report a demonstration video-rate heterodyne holography in off-axis configuration. Reconstruction and display of 1 Megapixel holograms is achieved at 24 frames per second, with a graphics processing unit. Our claims are validated with real-time screening of steady-state vibration amplitudes in a wide-field, non-contact vibrometry experiment.