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US 2025/0093198 A1Published application
System, method, and apparatus for extended field digital holographic vibration imaging via aliased sparse spatial sampling
OwnerMatthew P. Dierkinginventor
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Abstract
A device may include a stable laser light source configured to provide a master reference in a Doppler vibrometer scheme, a camera configured to receive scattered light from an object and a reference beam, an optical device configured to generate multiple illumination beams, an acquisition system configured to acquire images and precision timing data returned from the object, and an image processor configured to demodulate light detected by the camera via digital holographic scheme. The example image processor performs pulse-pair Doppler processing to determine vibration of the object.
Claims23
A vibration image measurement system comprising:
- a stable laser light source configured to provide a master reference in a Doppler vibrometer scheme;
- a camera configured to receive scattered light from an object and a reference beam;
- an optical device configured to generate multiple illumination beams;
- an acquisition system configured to acquire images and precision timing data returned from the object;
- an image processor configured to demodulate light detected by the camera via digital holographic scheme;
- an image processor configured to perform pulse-pair Doppler processing to determine vibration of the object;
- first optics configured to direct light from the stable laser light source to provide sparse illumination of the object;
- second optics configured to provide the reference beam for the camera;
- relay optics configured to provide required image locations of the sparse illumination spots;
- and
- third optics configured to mix the received light with the spatially offset reference beam for holographic detection.
8 more elements
Dependencies are inferred from the claim text.