Numerical algorithm for the retrieval of spatial coherence properties of partially coherent beams from transverse intensity measurements

Rydberg, Christer; Bengtsson, Jörgen

doi:10.1364/oe.15.013613

Cited by 16 publications

(12 citation statements)

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“…The first step to such a more flexible solution has been proposed by Rydberg et al [60] who have adapted ideas from iterative phase-retrieval methods, to be discussed in section 6.2, and suggested an efficient iterative approach that may make this possible.…”

Section: Coherence Measurementmentioning

confidence: 99%

Coherent methods in the X-ray sciences

Nugent

2010

Advances in Physics

455

340

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X-ray sources are developing rapidly and their coherent output is growing extremely rapidly. The increased coherent flux from modern X-ray sources is being matched with an associated rapid development in experimental methods. This article reviews the literature describing the ideas that utilise the increased brilliance from modern Xray sources. It explores how ideas in coherent X-ray science are leading to developments in other areas, and vice versa. The article describes measurements of coherence properties and uses this discussion as a base from which to describe partially-coherent diffraction and X-ray phase contrast imaging, with its applications in materials science, engineering and medicine. Coherent diffraction imaging methods are reviewed along with associated experiments in materials science. Proposals for experiments to be performed with the new X-ray free-electron-lasers are briefly discussed. The literature on X-ray photon correlation spectroscopy is described and the features it has in common with other coherent X-ray methods are identified. Many of the ideas used in the coherent X-ray literature have their origins in the optical and electron communities and these connections are explored. A review of the areas in which ideas from coherent X-ray methods are contributing to methods for the neutron, electron and optical communities is presented.

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Section: Coherence Measurementmentioning

confidence: 99%

Coherent methods in the X-ray sciences

Nugent

2010

Advances in Physics

455

340

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“…Then, perform a projection procedure similar to the Gerchberg-Saxton-Fienup type of update by rescaling the real space auxiliary function by an optimal intensity factor and returning back to the Fourier space representation [13,[21][22][23]:…”

Section: Inverse Problem Formulationmentioning

confidence: 99%

Multiplexed coded illumination for Fourier Ptychography with an LED array microscope

Tian¹,

Xiao²,

Ramchandran³

et al. 2014

Biomed. Opt. Express

516

386

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Fourier Ptychography is a new computational microscopy technique that achieves gigapixel images with both wide field of view and high resolution in both phase and amplitude. The hardware setup involves a simple replacement of the microscope's illumination unit with a programmable LED array, allowing one to flexibly pattern illumination angles without any moving parts. In previous work, a series of low-resolution images was taken by sequentially turning on each single LED in the array, and the data were then combined to recover a bandwidth much higher than the one allowed by the original imaging system. Here, we demonstrate a multiplexed illumination strategy in which multiple randomly selected LEDs are turned on for each image. Since each LED corresponds to a different area of Fourier space, the total number of images can be significantly reduced, without sacrificing image quality. We demonstrate this method experimentally in a modified commercial microscope. Compared to sequential scanning, our multiplexed strategy achieves similar results with approximately an order of magnitude reduction in both acquisition time and data capture requirements.

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“…The complete characterization of the 4D coherence function (so-called coherence measurement or coherence retrieval) has always been an active research area. The representative approaches include direct interferometric measurement [195,196], phase-space tomography [197,198], multi-plane coherence retrieval [199,200], are windowed Fourier transform approach [201,202].…”

Section: Light Field Moment Imaging Using Tiementioning

confidence: 99%

3D Imaging based on Depth Measurement Technologies

Ni¹,

Zuo²,

Lam

et al. 2018

Preprint

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Three-dimensional (3D) imaging has attracted more and more interests because of its widespread applications, especially in information and life science. These techniques can be broadly divided into two types: ray-based and wavefront-based 3D imaging. Issues such as imaging quality and system complexity of these techniques limit the applications significantly, and therefore many investigations have focused on 3D imaging from depth measurements. This paper presents an overview of 3D imaging from depth measurements, and provides a summary of the connection between these the ray-based and wavefront-based 3D imaging techniques.

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Numerical algorithm for the retrieval of spatial coherence properties of partially coherent beams from transverse intensity measurements

Cited by 16 publications

References 0 publications

Coherent methods in the X-ray sciences

Coherent methods in the X-ray sciences

Multiplexed coded illumination for Fourier Ptychography with an LED array microscope

3D Imaging based on Depth Measurement Technologies

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