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FMCW lidar-enabled stabilization for range-selective digital holographic imaging of vibrating objects
Applied Optics
|April 24, 2026
Summary
Range-selective digital holography (RSDH) now uses frequency-modulated continuous-wave (FMCW) lidar for stabilization. This allows high-fidelity outdoor holographic imaging with improved signal-to-noise ratio, even with significant object motion.
Area of Science:
- Coherent optical imaging
- Advanced sensor technologies
Background:
- Digital holography (DH) enables 3D reconstructions but is sensitive to motion.
- Object motion causes phase variations, degrading hologram quality and necessitating short integration times, which lowers signal-to-noise ratio (SNR).
Purpose of the Study:
- To develop a stabilization system for range-selective digital holography (RSDH) using frequency-modulated continuous-wave (FMCW) lidar.
- To enable high-fidelity holographic reconstructions outdoors with long integration times and improved SNR, despite object motion.
Main Methods:
- Combined RSDH with FMCW lidar to create a temporally modulated interference pattern.
- Tuned local-oscillator frequency for range selectivity and stabilization.
- Demonstrated outdoor reconstructions at distances up to 90m with object displacement exceeding 18 optical wavelengths.
Main Results:
- Achieved high-fidelity holographic reconstructions outdoors up to 90m.
- Enabled long integration times, significantly increasing SNR.
- Demonstrated robustness against object motion (over 18 optical wavelengths displacement).
Conclusions:
- FMCW lidar-enabled stabilization overcomes motion sensitivity in RSDH.
- The system allows for high-SNR, long-integration-time holographic imaging in dynamic outdoor environments.
- The architecture supports a multi-kilometer holographic imaging range with broad stabilization capabilities.
