  Femtosecond-scale ultrafast imaging is an essential tool for visualizing
ultrafast dynamics in molecular biology, physical chemistry, atomic physics,
and fluid dynamics. Pump-probe imaging and a streak camera are the most widely
used techniques, but they are either demanding the repetitions of the same
scene or sacrificing the number of imaging dimensions. Many interesting
single-shot ultrafast imaging techniques have been developed in recent years
for recording non-repetitive dynamic scenes. Nevertheless, there are still
weaknesses in the number of frames, the number of image pixels, or
spatial/temporal resolution. Here, we present a single-shot ultrafast
microscopy that can capture more than a dozen frames at a time with the frame
rate of 5 THz. We combine a spatial light modulator and a custom-made echelon
for efficiently generating a large number of reference pulses with designed
time delays and propagation angles. The single-shot recording of the
interference image between these reference pulses with a sample pulse allows us
to retrieve the stroboscopic images of the dynamic scene at the timing of the
reference pulses. We demonstrated the recording of 14 temporal snapshots at a
time, which is the largest to date, with the optimal temporal resolution set by
the laser output pulse. Our ultrafast microscopy is highly scalable in the
number of frames and temporal resolutions, and this will have profound impacts
on uncovering the interesting spatio-temporal dynamics yet to be explored.
