System, method, and apparatus for digital holographic vibration imaging with integral sparse precision temporal sampling

Abstract

An example device includes a stable laser light source for master reference in a Doppler vibrometer scheme, a camera configured to receive scattered light from a target and a spatially offset reference beam, and a precision timer for acquisition control and data registration. The example device further includes an optical encoder configured to insert precision timing data into each image frame, and an acquisition system configured to acquire images from the camera, the images including the precision timing data. The example device includes an image processor configured to demodulate light from the acquired images via a digital holographic scheme, and to perform pulse-pair Doppler processing to determine vibration of the target, and optics configured to direct light from the light source to illuminate the target, to provide the reference beam, and to mix the reference beam with the received scattered light for holographic detection.

Dependencies are inferred from the claim text.