Overview
- Haidet published the demonstration on October 17, showing a laser beam progressing through a mirror path in extreme slow motion.
- The system captures sequential one-pixel traces using a gimbal-driven mirror and then tiles them into apparent full frames at 2 billion fps.
- Fog-scattered photons are measured by a photomultiplier feeding an oscilloscope at 2 billion samples per second with a combined signal and sync line to reduce noise, as described in his video.
- The build is a ground-up upgrade from his 2024 billion-fps setup, adding higher-precision motors, strengthened optics, and redesigned software to handle data throughput.
- Light advances roughly six inches per frame at this rate, and perceived differences in arrival times across the beam result from varying path lengths rather than any new physics; professional lab systems have reached far higher rates using costly specialized gear.