scholarly journals Speckle rotation decorrelation based single-shot video through scattering media

2019 ◽  
Vol 27 (10) ◽  
pp. 14567 ◽  
Author(s):  
Yaoyao Shi ◽  
Youwen Liu ◽  
Wei Sheng ◽  
Jiming Wang ◽  
Tong Wu
Keyword(s):  
Single Shot ◽  
Scattering Media

scholarly journals High-speed single-shot optical focusing through dynamic scattering media with full-phase wavefront shaping

2017 ◽  
Vol 111 (22) ◽  
pp. 221109 ◽  
Author(s):  
Ashton S. Hemphill ◽  
Yuecheng Shen ◽  
Yan Liu ◽  
Lihong V. Wang
Keyword(s):  
High Speed ◽  
Single Shot ◽  
Scattering Media ◽  
Wavefront Shaping ◽  
Optical Focusing ◽  
Dynamic Scattering

Single-shot, two-dimensional ballistic imaging through scattering media

2004 ◽  
Vol 43 (26) ◽  
pp. 5100 ◽  
Author(s):  
Megan Paciaroni ◽  
Mark Linne
Keyword(s):  
Single Shot ◽  
Two Dimensional ◽  
Scattering Media ◽  
Ballistic Imaging

scholarly journals Single-shot large field of view imaging with scattering media by spatial demultiplexing

2018 ◽  
Vol 57 (26) ◽  
pp. 7533 ◽  
Author(s):  
Dongliang Tang ◽  
Sujit Kumar Sahoo ◽  
Vinh Tran ◽  
Cuong Dang
Keyword(s):  
Field Of View ◽  
Large Field ◽  
Single Shot ◽  
Scattering Media

scholarly journals Single-shot noninvasive three-dimensional imaging through scattering media

2019 ◽  
Vol 44 (16) ◽  
pp. 4032 ◽  
Author(s):  
Ryoichi Horisaki ◽  
Yuka Okamoto ◽  
Jun Tanida
Keyword(s):  
Three Dimensional ◽  
Single Shot ◽  
Scattering Media ◽  
Three Dimensional Imaging

scholarly journals Real-time frequency-encoded spatiotemporal focusing through scattering media using a programmable 2D ultrafine optical frequency comb

2020 ◽  
Vol 6 (8) ◽  
pp. eaay1192 ◽  
Author(s):  
Xiaoming Wei ◽  
Yuecheng Shen ◽  
Joseph C. Jing ◽  
Ashton S. Hemphill ◽  
Changsheng Yang ◽  
...  
Keyword(s):  
Real Time ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Single Shot ◽  
Scattering Media ◽  
Wave Source ◽  
Time Frequency ◽  
Temporal Focusing ◽  
Wavefront Shaping

Optical wavefront shaping is a powerful tool for controlling photons in strongly scattering media. Its speed, however, has been the bottleneck for in vivo applications. Moreover, unlike spatial focusing, temporal focusing from a continuous-wave source has rarely been exploited yet is highly desired for nonlinear photonics. Here, we present a novel real-time frequency-encoded spatiotemporal (FEST) focusing technology. FEST focusing uses a novel programmable two-dimensional optical frequency comb with an ultrafine linewidth to perform single-shot wavefront measurements, with a fast single-pixel detector. This technique enables simultaneous spatial and temporal focusing at microsecond scales through thick dynamic scattering media. This technology also enabled us to discover the large-scale temporal shift, a new phenomenon that, with the conventional spatial memory effect, establishes a space-time duality. FEST focusing opens a new avenue for high-speed wavefront shaping in the field of photonics.

scholarly journals Single-Shot Time-Reversed Optical Focusing into and through Scattering Media

ACS Photonics ◽  
2020 ◽  
Vol 7 (10) ◽  
pp. 2871-2877
Author(s):  
Zhongtao Cheng ◽  
Jiamiao Yang ◽  
Lihong V. Wang
Keyword(s):  
Single Shot ◽  
Scattering Media ◽  
Optical Focusing

scholarly journals Optimizing Single-Shot Coherent Power-Spectrum Scattering Imaging Adaptively by Tuning Feedback Coefficient for Practical Exposure Conditions

2019 ◽  
Vol 9 (18) ◽  
pp. 3676
Author(s):  
Wei Wang ◽  
Yanfang Guo ◽  
Wusheng Tang ◽  
Wenjun Yi ◽  
Mengzhu Li ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Real Time ◽  
Exposure Level ◽  
Single Shot ◽  
Scattering Media ◽  
Diffractive Imaging ◽  
Driving Assistance ◽  
Spectrum Imaging ◽  
Feedback Coefficient ◽  
Exposure Conditions

With only one piece of the power-spectrum pattern, the single-shot coherent power-spectrum imaging can provide a clear object image for real-time applications even if the object is hidden by opaque scattering media, in which the feedback coefficient β value for the reconstruction with least retrievals and fastest speed has to be pre-estimated through time-consuming iterative loops. Here we report a method for estimating the optimal β value from the captured raw power-spectrum images adaptively to optimize the single-shot coherent power-spectrum imaging for practical exposure conditions. The results demonstrate that, based on exposure level analysis of the captured raw power-spectrum images even of underexposure, moderate exposure, and overexposure cases, the β value could be quickly determined with a compact expression for the algorithm to achieve clear reconstruction output efficiently. The proposed method helps to push ahead of the coherent diffractive imaging devices for real-time imaging through turbid mediums in Artificial Intelligence (AI), driving assistance, and flight assistance applications.

scholarly journals Focusing light into scattering media with ultrasound-induced field perturbation

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhongtao Cheng ◽  
Lihong V. Wang
Keyword(s):  
High Speed ◽  
Superior Performance ◽  
Single Shot ◽  
Scattering Media ◽  
Zeroth Order ◽  
Field Perturbation ◽  
Induced Field ◽  
Wavefront Shaping ◽  
Flexible Mechanism ◽  
Optical Focusing

AbstractFocusing light into scattering media, although challenging, is highly desirable in many realms. With the invention of time-reversed ultrasonically encoded (TRUE) optical focusing, acousto-optic modulation was demonstrated as a promising guidestar mechanism for achieving noninvasive and addressable optical focusing into scattering media. Here, we report a new ultrasound-assisted technique, ultrasound-induced field perturbation optical focusing, abbreviated as UFP. Unlike in conventional TRUE optical focusing, where only the weak frequency-shifted first-order diffracted photons due to acousto-optic modulation are useful, here UFP leverages the brighter zeroth-order photons diffracted by an ultrasonic guidestar as information carriers to guide optical focusing. We find that the zeroth-order diffracted photons, although not frequency-shifted, do have a field perturbation caused by the existence of the ultrasonic guidestar. By detecting and time-reversing the differential field of the frequency-unshifted photons when the ultrasound is alternately ON and OFF, we can focus light to the position where the field perturbation occurs inside the scattering medium. We demonstrate here that UFP optical focusing has superior performance to conventional TRUE optical focusing, which benefits from the more intense zeroth-order photons. We further show that UFP optical focusing can be easily and flexibly developed into double-shot realization or even single-shot realization, which is desirable for high-speed wavefront shaping. This new method upsets conventional thinking on the utility of an ultrasonic guidestar and broadens the horizon of light control in scattering media. We hope that it provides a more efficient and flexible mechanism for implementing ultrasound-guided wavefront shaping.

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