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SDR-ToF: Million Optical Depth Samples per Second Using Software-Defined Radio

visual microphone fast depth rates enable vibration sensing.

tuning fork

tuning fork vibration result — measured vibration and damping

Position X at the tip does not excite the clang mode; middle hit Y does. The damping behavior is visible.

direct audio setup — direct audio

microphone — guitar tones

ours — guitar tones

microphone — mary had a little lamb

ours — mary had a little lamb

indirect audio setup — indirect audio

microphone — guitar tones

ours — guitar tones

microphone — mary had a little lamb

ours — mary had a little lamb

static depth Scans static depth scans obtained from point sensors steered with mirrors.

pawn

Pawn RGB image — RGB

Pawn intensity image — intensity
magnitude of IQ measurement

interactive viewer

phase
atan2(Q, I)

king & queen

King and queen RGB image — RGB

King and queen intensity image — intensity
magnitude of IQ measurement

interactive viewer

phase
atan2(Q, I)

dynamic depth Scans dynamic depth scans obtained from point sensors steered with mirrors.

1D scan

Ref. RGB 1D scan scene (scan line is moving left and right on the blade at 200 kHz)

1D scan RGB image — 1D depth scan (obtained at 200 lines/second)

2D scans

Ref. RGB 2D scan scene

2D depth scan (Obtained at 4 FPS)

optical velocimetry fast depth rates enable velocity from depth derivatives.

Optical velocimetry result for Hackzall — Hackzall

Optical velocimetry result for multitool — Multitool

hardware reproducibility reproducibility of hardware implementation