Punching holes in light: recent progress in single-shot coded-aperture optical imaging

Abstract

Single-shot coded-aperture optical imaging physically captures a code-aperture-modulated optical signal in one exposure and then recovers the scene via computational image reconstruction. Recent years have witnessed dazzling advances in various modalities in this hybrid imaging scheme in concomitant technical improvement and widespread applications in physical, chemical and biological sciences. This review comprehensively surveys state-of-the-art single-shot coded-aperture optical imaging. Based on the detected photon tags, this field is divided into six categories: planar imaging, depth imaging, light-field imaging, temporal imaging, spectral imaging, and polarization imaging. In each category, we start with a general description of the available techniques and design principles, then provide two representative examples of active-encoding and passive-encoding approaches, with a particular emphasis on their methodology and applications as well as their advantages and challenges. Finally, we envision prospects for further technical advancement in this field.

Fast wide-field upconversion luminescence lifetime thermometry enabled by single-shot compressed ultrahigh-speed imaging

“…SPLIT’s reconstruction algorithm shows a superb performance to existing mainstream algorithms popularly used in single-shot compressed ultrafast imaging 41 , 42 , 47 , 48 . By using the experimental data, the comparison demonstrates that the dual-view PnP-ADMM algorithm used by SPLIT is more powerful in preserving spatial features while maintaining a low background, which enables a more accurate lifetime quantification and the ensuing temperature mapping (detailed in Supplementary Note 8 and Supplementary Fig.…”

“…To surmount these limitations, we report an optical temperature mapping modality, termed single-shot photoluminescence lifetime imaging thermometry (SPLIT). Synergistically combining dual-view optical streak imaging with compressed sensing 41 , SPLIT records wide-field luminescence decay of Er 3+ , Yb 3+ co-doped NaGdF 4 UCNPs in real time, from which a lifetime-based 2D temperature map is obtained in a single exposure. Largely advancing existing optical thermometry techniques in detection capabilities, SPLIT enables longitudinal 2D temperature monitoring beneath a thin scattering medium and dynamic temperature tracking of a moving biological sample at single-cell resolution.…”

Modelling of A New X-Ray Backscatter Imaging System: Simulation Investigation

“…The pinhole imaging system produces the one-to-one ratio relationship between the object and the image because of its small size and dim and inverted image [8,21]. The advantages of using the single pinhole system are that it is cheap and straightforward, can be used for any wavelength, and objects at any distance produce clear images (great ''depth of field'') [22].…”

Acousto-optically driven single-shot ultrafast optical imaging

“…The need for high temporal and spatial resolutions has then remarkably fueled unprecedented advances in ultrafast optical imaging, and sub-picosecond and sub-nanometer resolutions are now accessible to various technologies. Transient phenomena are traditionally captured using pump-probe methods, which are however intrinsically limited to highly repeatable experimental conditions [5,6,7]. Some techniques, such as time-stretch imaging [8], leverage their high throughput capabilities for recording high-speed processes on long -microsecondtime scales with frame rates in the order of a hundred million of frames-per-second (fps) [9,10].…”