Mr. Ashton S. Hemphill Profile

Ashton S. Hemphill

at Caltech

SPIE Involvement:

Author

Publications (6)

SPIE Journal Paper | 28 August 2018 Open Access

High-speed alignment optimization of digital optical phase conjugation systems based on autocovariance analysis in conjunction with orthonormal rectangular polynomials

Ashton S. Hemphill, Yuecheng Shen, Jeeseong Hwang, Lihong V. Wang

JBO, Vol. 24, Issue 03, 031004, (August 2018) https://doi.org/10.1117/12.10.1117/1.JBO.24.3.031004

KEYWORDS: Spatial light modulators, Cameras, Scattering, Optical alignment, Phase conjugation, Light scattering, Mirrors, Scattering media, Wavefronts, Tissue optics

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Proceedings Article | 14 March 2018 Presentation

High-speed single-shot optical focusing through dynamic turbid media (Conference Presentation)

Ashton Hemphill, Yuecheng Shen, Yan Liu, Lihong Wang

Proceedings Volume 10502, 105020M (2018) https://doi.org/10.1117/12.2289306

KEYWORDS: Tissue optics, Soft tissue optics, Light scattering, Wavefronts, Biomedical optics, Adaptive optics, Phase conjugation, Holography, Scattering, Speckle

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Proceedings Article | 14 March 2018 Presentation

Focusing light through scattering media by polarization modulation based generalized digital optical phase conjugation (Conference Presentation)

Jiamiao Yang, Yuecheng Shen, Yan Liu, Ashton Hemphill, Lihong Wang

Proceedings Volume 10502, 105020L (2018) https://doi.org/10.1117/12.2287467

KEYWORDS: Modulation, Tissue optics, Polarization, Light scattering, Wavefronts, Scattering media, Phase conjugation, Spatial light modulators, Biomedical optics, Scattering

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SPIE Journal Paper | 14 September 2016 Open Access

Hybridized wavefront shaping for high-speed, high-efficiency focusing through dynamic diffusive media

Ashton Hemphill, Jian Wei Tay, Lihong Wang

JBO, Vol. 21, Issue 12, 121502, (September 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.12.121502

KEYWORDS: Wavefronts, Spatial light modulators, Digital micromirror devices, Speckle, Tissue optics, Diffusers, Light scattering, Tissues, Scattering media, Scattering

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Proceedings Article | 15 March 2016 Presentation + Paper

Hybrid iterative wavefront shaping for high-speed focusing through scattering media

Ashton Hemphill, Lihong Wang

Proceedings Volume 9717, 97170V (2016) https://doi.org/10.1117/12.2211434

KEYWORDS: Wavefronts, Spatial light modulators, Tissue optics, Digital micromirror devices, Scattering media, Light scattering, Adaptive optics, Diffusion, Scattering, Speckle, Tissues, Beam splitters, Diffusers, In vivo imaging

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Proceedings Article | 11 March 2015 Paper

Amplitude-masked photoacoustic wavefront shaping: theory and application in flowmetry

Jinyang Liang, Jian Wei Tay, Ashton Hemphill, Lihong Wang

Proceedings Volume 9323, 932310 (2015) https://doi.org/10.1117/12.2081693

KEYWORDS: Digital micromirror devices, Signal to noise ratio, Particles, Signal detection, Photoacoustic spectroscopy, Geometrical optics, Wavefronts, Tissue optics, Pulsed laser operation, Transducers

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Showing 5 of 6 publications

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