Abstract
Compressed ultrafast photography (CUP) is a burgeoning single-shot computational imaging technique that provides an imaging speed as high as 10 trillion frames per second and a sequence depth of up to a few hundred frames. This technique synergizes compressed sensing and the streak camera technique to capture nonrepeatable ultrafast transient events with a single shot. With recent unprecedented technical developments and extensions of this methodology, it has been widely used in ultrafast optical imaging and metrology, ultrafast electron diffraction and microscopy, and information security protection. We review the basic principles of CUP, its recent advances in data acquisition and image reconstruction, its fusions with other modalities, and its unique applications in multiple research fields.
Highlights
Researchers and photographers have long sought to unravel transient events on an ultrashort time scale using ultrafast imaging
The measured Eðx[0]; y0Þ has dimensions Nx× ðNy þ Nt − 1Þ, and the spatial resolution of Compressed ultrafast photography (CUP) is mainly determined by Nx and Ny or the mask pixel size, d, while the temporal resolution is restricted by Nt, which is related to the shearing velocity of streak camera, v
In this mini-review, we have focused on recent advances in CUP
Summary
Researchers and photographers have long sought to unravel transient events on an ultrashort time scale using ultrafast imaging. Are highly repeatable, reliable pump-probe schemes are used to explore the underlying mechanisms This strategy becomes ineffective in circumstances with unstable and even irreversible dynamics, such as optical rogue waves,[9] irreversible structural dynamics in chemical reactions,[10,11] and shock waves in inertial confinement fusion.[12] To overcome this technical limitation, a variety of single-shot ultrafast imaging techniques with the ability to visualize the evolution of twodimensional (2-D) spatial information have been proposed.[13]. Qi et al.: Single-shot compressed ultrafast photography: a review important and reliable for capturing transient events in real time, an increasing number of reconstruction imaging approaches have achieved substantial progress in various specifications, such as imaging speed, number of pixels per frame, and sequence depth (i.e., frames per shot).
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