Custom frame timing captures ultrafast events across five orders of magnitude in time
Most conventional methods of ultrafast photography use evenly spaced intervals in which images are taken, but new developments have shown how much can be left out of the story, especially when multiple timescales are involved.
Conventional ultrafast imaging methods typically utilize evenly spaced intervals to capture events, however, this approach can miss crucial details when multiple timescales are involved, as new research from the University of Tokyo demonstrates. Keiichi Nakagawa and his team developed a novel technique called logarithmic ultrafast photography, which focuses image captures on the moments of significant dynamic changes during ultrafast events, such as laser pulses or shock-wave emissions.
This method employs band-resolved individual delay generation (BRIDGE) to sequentially extract wavelength bands and map them to specific instants during the dynamic process. By customizing the intervals between frames, researchers can observe both the initial instance and the subsequent events in one shot, effectively capturing key moments across a wide range of timescales—from 100 femtoseconds to 10 nanoseconds.
This technique holds promise for various fields, including laser processing, material dynamics, plasma and shock-wave research, and biomedical applications.
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