Journal ArticleDOI
Phase-diversity wave-front sensing with a distorted diffraction grating
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TLDR
A novel wave-front sensor comprising a distorted diffraction grating, simple optics, and a single camera is described and performance is validated against different Zernike modes and a representative atmospheric phase map.Abstract:
We describe a novel wave-front sensor comprising a distorted diffraction grating, simple optics, and a single camera. A noniterative phase-diversity algorithm is used for wave-front reconstruction. The sensor concept and practical implementation are described in detail, and performance is validated against different Zernike modes and a representative atmospheric phase map.read more
Citations
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Journal ArticleDOI
Phase retrieval from series of images obtained by defocus variation
Leslie J. Allen,Mark P. Oxley +1 more
TL;DR: Three different methods of phase retrieval from series of image measurements obtained at different defocus values are developed and compared, with an approximate solution to the transport of intensity equation (TIE) based on Fourier transforms using multigrid methods.
Journal ArticleDOI
Transport of intensity equation: a tutorial
Chao Zuo,Jiaji Li,Jiasong Sun,Fan Yao,Jialin Zhang,Linpeng Lu,Runnan Zhang,Bowen Wang,Lei Huang,Chen Qian +9 more
TL;DR: A new era in which strict coherence and interferometry are no longer prerequisites for quantitative phase imaging and diffraction tomography is highlighted, paving the way toward new generation label-free three-dimensional microscopy, with applications in all branches of biomedicine.
Journal ArticleDOI
Physics and Computation of Aero-Optics
TL;DR: A critical review of aero-optics with an emphasis on recent developments in computational predictions and the physical mechanisms of flow-induced optical distortions is provided in this paper, along with a brief survey of wave-front sensors used in experimental measurements.
Journal ArticleDOI
Transport of intensity phase imaging in a volume holographic microscope
TL;DR: A method for single-shot quantitative phase imaging based on the transport of intensity equation (TIE) in a volume holographic microscope (VHM) using a multiplexed volume hologram to solve the TIE and recover object phase quantitatively.
PatentDOI
Holographic wavefront sensor
Geoff Andersen,Randy R. Reibel +1 more
TL;DR: A new type of modal wavefront sensor that uses a multiplexed hologram and position-sensing detectors to measure the amplitudes of a preselected set of eight Zernike modes in an input beam that has the potential to operate at megahertz speeds without the need for computer calculations.
References
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Journal Article
A practical algorithm for the determination of phase from image and diffraction plane pictures
TL;DR: In this article, an algorithm is presented for the rapid solution of the phase of the complete wave function whose intensity in the diffraction and imaging planes of an imaging system are known.
Journal ArticleDOI
Optical Resolution Through a Randomly Inhomogeneous Medium for Very Long and Very Short Exposures
TL;DR: In this article, the average resolution of very-long and very-short-exposure images is studied in terms of the phase and log-amplitude structure functions, whose sum is called the wave-structure function.
Journal ArticleDOI
Deterministic phase retrieval: a Green’s function solution
TL;DR: In this article, the propagation of phase and irradiance are derived, and a Green's function solution for the phase in terms of irradiance and perimeter phase values is given A measurement scheme is discussed, and the results of a numerical simulation are given Both circular and slit pupils are considered.
Journal ArticleDOI
Phase Retrieval And Diversity In Adaptive Optics
TL;DR: The mathematics of the technique are described, some computer simulations which involve both point sources and extended objects are shown and it is shown that the method provides an interesting challenge to designers of optical devices.