scholarly journals Lock-in camera based heterodyne holography for ultrasound-modulated optical tomography inside dynamic scattering media

2016 ◽  
Vol 108 (23) ◽  
pp. 231106 ◽  
Author(s):  
Yan Liu ◽  
Yuecheng Shen ◽  
Cheng Ma ◽  
Junhui Shi ◽  
Lihong V. Wang
Keyword(s):  
Optical Tomography ◽  
Scattering Media ◽  
Lock In ◽  
Dynamic Scattering

scholarly journals Optical encryption using uncorrelated characteristics of dynamic scattering media and spatially random sampling of a plaintext

2020 ◽  
Vol 28 (24) ◽  
pp. 36432
Author(s):  
Qing Han ◽  
Wenjing Zhao ◽  
Aiping Zhai ◽  
Zhirun Wang ◽  
Dong Wang
Keyword(s):  
Random Sampling ◽  
Scattering Media ◽  
Optical Encryption ◽  
Dynamic Scattering

Optical Tomography With a Least Square Finite Element Formulation of the Collimated Irradiation in Frequency Domain

2010 ◽  
Author(s):  
Olivier Balima ◽  
Joan Boulanger ◽  
Andre´ Charette ◽  
Daniel Marceau
Keyword(s):  
Finite Element ◽  
Optical Properties ◽  
Frequency Domain ◽  
Complex Geometry ◽  
Numerical Study ◽  
Optical Tomography ◽  
Least Square ◽  
Finite Element Formulation ◽  
Element Formulation ◽  
Scattering Media

This paper presents a numerical study of optical tomography in frequency domain for the reconstruction of optical properties of scattering and absorbing media with collimated irradiation light sources. The forward model is a least square finite element formulation of the collimated irradiation problem where the intensity is separated into its collimated and scattered parts. This model does not use any empirical stabilization and moreover the collimated source direction is taken into account. The inversion uses a gradient type minimization method where the gradient is computed through an adjoint formulation. Scaling is used to avoid numerical round errors, as the output readings at detectors are very low. Numerical reconstructions of optical properties of absorbing and scattering media with simulated data (noised and noise-free) are achieved in a complex geometry with satisfactory results. The results show that complex geometries are well handled with the proposed method.

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

Use of backprojection algorithms of filtered shadows for optical tomography of strongly scattering media

2001 ◽  
Author(s):  
Alexander G. Kalintsev ◽  
Alexander B. Konovalov ◽  
Olga V. Kravtsenyuk ◽  
Igor I. Kutuzov ◽  
Oleg V. Lyamtsev ◽  
...  
Keyword(s):  
Optical Tomography ◽  
Scattering Media
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