The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Shensheng Han - One of the best experts on this subject based on the ideXlab platform.
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non invasive three dimension control of Light between turbid layers using a surface quasi Point Light Source for precorrection
Scientific Reports, 2017Co-Authors: Mu Qiao, Honglin Liu, Guanghui Pang, Shensheng HanAbstract:Manipulating Light non-invasively through inhomogeneous media is an attractive goal in many disciplines. Wavefront shaping and optical phase conjugation can focus Light to a Point. Transmission matrix method can control Light on multiple output modes simultaneously. Here we report a non-invasive approach which enables three-dimension (3D) Light control between two turbid layers. A digital optical phase conjugation mirror measured and conjugated the diffused wavefront, which originated from a quasi-Point Source on the front turbid layer and passed through the back turbid layer. And then, because of memory effect, the phase-conjugated wavefront could be used as a carrier wave to transport a pre-calculated wavefront through the back turbid layer. The pre-calculated wavefront could project a desired 3D Light field inside the sample, which, in our experiments, consisted of two 220-grid ground glass plates spaced by a 20 mm distance. The controllable range of Light, according to the memory effect, was calculated to be 80 mrad in solid angle and 16 mm on z-axis. Due to the 3D Light control ability, our approach may find applications in photodynamic therapy and optogenetics. Besides, our approach can also be combined with ghost imaging or compressed sensing to achieve 3D imaging between turbid layers.
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Direct 3D imaging of an internal space encompassed by turbid layers using a surface quasi-Point Light Source for precorrection
International Conference on Photonics and Imaging in Biology and Medicine, 2017Co-Authors: Honglin Liu, Mu Qiao, Guanghui Pang, Shensheng HanAbstract:A method to noninvasively see inside an internal space encompassed by turbid layers, e.g., eggs, edema and bladders, using a surface quasi-Point Light Source for precorrection is presented, which has equivalently infinite depth of field.
Mu Qiao - One of the best experts on this subject based on the ideXlab platform.
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non invasive three dimension control of Light between turbid layers using a surface quasi Point Light Source for precorrection
Scientific Reports, 2017Co-Authors: Mu Qiao, Honglin Liu, Guanghui Pang, Shensheng HanAbstract:Manipulating Light non-invasively through inhomogeneous media is an attractive goal in many disciplines. Wavefront shaping and optical phase conjugation can focus Light to a Point. Transmission matrix method can control Light on multiple output modes simultaneously. Here we report a non-invasive approach which enables three-dimension (3D) Light control between two turbid layers. A digital optical phase conjugation mirror measured and conjugated the diffused wavefront, which originated from a quasi-Point Source on the front turbid layer and passed through the back turbid layer. And then, because of memory effect, the phase-conjugated wavefront could be used as a carrier wave to transport a pre-calculated wavefront through the back turbid layer. The pre-calculated wavefront could project a desired 3D Light field inside the sample, which, in our experiments, consisted of two 220-grid ground glass plates spaced by a 20 mm distance. The controllable range of Light, according to the memory effect, was calculated to be 80 mrad in solid angle and 16 mm on z-axis. Due to the 3D Light control ability, our approach may find applications in photodynamic therapy and optogenetics. Besides, our approach can also be combined with ghost imaging or compressed sensing to achieve 3D imaging between turbid layers.
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Direct 3D imaging of an internal space encompassed by turbid layers using a surface quasi-Point Light Source for precorrection
International Conference on Photonics and Imaging in Biology and Medicine, 2017Co-Authors: Honglin Liu, Mu Qiao, Guanghui Pang, Shensheng HanAbstract:A method to noninvasively see inside an internal space encompassed by turbid layers, e.g., eggs, edema and bladders, using a surface quasi-Point Light Source for precorrection is presented, which has equivalently infinite depth of field.
Honglin Liu - One of the best experts on this subject based on the ideXlab platform.
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non invasive three dimension control of Light between turbid layers using a surface quasi Point Light Source for precorrection
Scientific Reports, 2017Co-Authors: Mu Qiao, Honglin Liu, Guanghui Pang, Shensheng HanAbstract:Manipulating Light non-invasively through inhomogeneous media is an attractive goal in many disciplines. Wavefront shaping and optical phase conjugation can focus Light to a Point. Transmission matrix method can control Light on multiple output modes simultaneously. Here we report a non-invasive approach which enables three-dimension (3D) Light control between two turbid layers. A digital optical phase conjugation mirror measured and conjugated the diffused wavefront, which originated from a quasi-Point Source on the front turbid layer and passed through the back turbid layer. And then, because of memory effect, the phase-conjugated wavefront could be used as a carrier wave to transport a pre-calculated wavefront through the back turbid layer. The pre-calculated wavefront could project a desired 3D Light field inside the sample, which, in our experiments, consisted of two 220-grid ground glass plates spaced by a 20 mm distance. The controllable range of Light, according to the memory effect, was calculated to be 80 mrad in solid angle and 16 mm on z-axis. Due to the 3D Light control ability, our approach may find applications in photodynamic therapy and optogenetics. Besides, our approach can also be combined with ghost imaging or compressed sensing to achieve 3D imaging between turbid layers.
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Direct 3D imaging of an internal space encompassed by turbid layers using a surface quasi-Point Light Source for precorrection
International Conference on Photonics and Imaging in Biology and Medicine, 2017Co-Authors: Honglin Liu, Mu Qiao, Guanghui Pang, Shensheng HanAbstract:A method to noninvasively see inside an internal space encompassed by turbid layers, e.g., eggs, edema and bladders, using a surface quasi-Point Light Source for precorrection is presented, which has equivalently infinite depth of field.
Guanghui Pang - One of the best experts on this subject based on the ideXlab platform.
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non invasive three dimension control of Light between turbid layers using a surface quasi Point Light Source for precorrection
Scientific Reports, 2017Co-Authors: Mu Qiao, Honglin Liu, Guanghui Pang, Shensheng HanAbstract:Manipulating Light non-invasively through inhomogeneous media is an attractive goal in many disciplines. Wavefront shaping and optical phase conjugation can focus Light to a Point. Transmission matrix method can control Light on multiple output modes simultaneously. Here we report a non-invasive approach which enables three-dimension (3D) Light control between two turbid layers. A digital optical phase conjugation mirror measured and conjugated the diffused wavefront, which originated from a quasi-Point Source on the front turbid layer and passed through the back turbid layer. And then, because of memory effect, the phase-conjugated wavefront could be used as a carrier wave to transport a pre-calculated wavefront through the back turbid layer. The pre-calculated wavefront could project a desired 3D Light field inside the sample, which, in our experiments, consisted of two 220-grid ground glass plates spaced by a 20 mm distance. The controllable range of Light, according to the memory effect, was calculated to be 80 mrad in solid angle and 16 mm on z-axis. Due to the 3D Light control ability, our approach may find applications in photodynamic therapy and optogenetics. Besides, our approach can also be combined with ghost imaging or compressed sensing to achieve 3D imaging between turbid layers.
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Direct 3D imaging of an internal space encompassed by turbid layers using a surface quasi-Point Light Source for precorrection
International Conference on Photonics and Imaging in Biology and Medicine, 2017Co-Authors: Honglin Liu, Mu Qiao, Guanghui Pang, Shensheng HanAbstract:A method to noninvasively see inside an internal space encompassed by turbid layers, e.g., eggs, edema and bladders, using a surface quasi-Point Light Source for precorrection is presented, which has equivalently infinite depth of field.
Zhan Song - One of the best experts on this subject based on the ideXlab platform.
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Photometric stereo with quasi-Point Light Source
Optics and Lasers in Engineering, 2018Co-Authors: Zhao Song, Ying Nie, Zhan SongAbstract:Abstract This paper presents a complete computational framework for the photometric stereo system composed of some LED lamps and a single web-camera. To describe the Lighting condition accurately, the angular and distance attenuation factors, as well as the LED radiance property, are considered in the modeling of the Light Source. The calibration of the system's parameters is a critical step for our setup, and a two-step calibration procedure is proposed in this work. A multiple-sphere-based approach is first used to estimate the Light Source positions. Then, a reference-plane-based approach is applied to estimate the principal optical axis of each Light Source and its principal energy. For each surface Point on the target, the direction and intensity of its incidental Light ray can be precisely determined by the calibration parameters and the quasi-Point Light model. Based on the initial 3D reconstruction result, an iterative procedure is applied to optimize the model's parameters for each surface Point with respect to its initial estimated depth. In the experiments, both regular and free-form surfaces including a real human face are used. The results show that accurate 3D reconstruction results can be obtained by the proposed approach based on the low-cost setup.