22 papers · ranked by Valyu relevance
Paulo Caldas, Gaspar Rego, Nunzio Cennamo
In this work, we review the most important achievements of an INESC TEC long-period-grating-based fiber optic Michelson and Mach-Zehnder configuration modal interferometer with coherence addressing and heterodyne interrogation as a sensing structure for measuring environmental refractive index and temperature. The…
Dainis Dravins
Optical imaging with microarcsecond resolution will reveal details across and outside stellar surfaces but requires kilometer-scale interferometers, challenging to realize either on the ground or in space. Intensity interferometry, electronically connecting independent telescopes, has a noise budget that relates to the…
Brian C. Lacki
The basic principle of astronomical interferometry is to derive the angular distribution of radiation in the sky from the Fourier transform of the electric field on the ground. What is so special about the Fourier transform? Nothing, it turns out. I consider the possibility of performing other transforms on the…
Josef Lazar, Petr Klapetek, Miroslav Valtr, Jan Hrabina + 5 more
'Zdenek Buchta' 'Onrej Cip' 'Martin Cizek' 'Jindrich Oulehla' 'Mojmir Sery'] We present a design of a nanometrology measuring setup which is a part of the national standard instrumentation for nanometrology operated by the Czech Metrology Institute (CMI) in Brno, Czech Republic. The system employs a full six-axis…
Guangyao Huang, Can Cui, Xiaoyang Lei, Qixue Li + 4 more
'Xinghui Li' 'Guochao Wang' 'Xiang Wu'] Optical interferometry has emerged as a cornerstone technology for high-precision length measurement, offering unparalleled accuracy in various scientific and industrial applications. This review provides a comprehensive overview of the latest advancements in optical…
Sarthak Patnaik
We know that the diffusion is defined as the movement of molecules under a potential gradient. It is characterized by the diffusion coefficient. Diffusion coefficient determination can be done via various techniques, but in this paper, we have had a broad look at interferometry based optical methods for diffusion…
Frank Eisenhauer, John D. Monnier, O. Pfuhl
After decades of experimental projects and fast-paced technical advances, optical / infrared (O/IR) interferometry has seen a revolution in the last years. The GRAVITY instrument at the VLTI with four 8 meter telescopes reaches thousand times fainter objects than possible with earlier interferometers, and the CHARA…
Farrokh Vakili-Christensen, Olivier Lai, Jean‐Pierre Rivet, William Guerin + 7 more
'William Guerin' 'G. Labeyrie' 'Mathilde Fouché' 'David Vernet' 'Robin Kaiser' 'Julien Chabé' 'Clément Courde' 'Étienne Samain'] Olivier Laia , William Guerinb , Farrokh Vakilia , Robin Kaiserb , Jean Pierre Riveta , Mathilde Fouchéb , Guillaume Labeyrieb , Julien Chabéc , Clément Courdec , Etienne Samainc , David…
Marek Peca, Pavel Psota, Petr Vojtíšek, Vít Lédl
An interferometer has been used to measure the surface profile of generic object. Frequency scanning interferometry has been employed to provide unambiguous phase readings, to suppress etalon fringes, and to supersede phase-shifting. The frequency scan has been performed in three narrow wavelength bands, each generated…
Km Nitu Rai, S. Basak, Subrata Sarangi, Prasenjit Saha
Effect Authors: ['Km Nitu Rai' 'S. Basak' 'Subrata Sarangi' 'Prasenjit Saha'] The correlation of light from two sources leads to an interference pattern if they belong to a specific time interval known as the coherence time, denoted as ∆τ . The relationship governing this phenomenon is ∆τ∆ν ≈ 1, where ∆ν represents the…
Wentao Wang, Qi Han, Hui Chen, Yuan Yuan + 1 more
Intensity interferometry (II) exploits the second-order correlation to acquire the spatial frequency information of an object, which has been used to observe distant stars since 1950s. However, due to unreliability of employed imaging reconstruction algorithms, II can only image simple and sparse objects such as double…
Zhuoya Ni, Qifeng Lu, Yishu Xu, Hongyuan Huo
This paper introduces an intensity simulation for the Fourier transform infrared spectrometer whose core element is the Michelson interferometer to provide support for the on-orbit monitoring of the instrument and to improve the data processing and application of the Fourier transform spectrometer. The Geostationary…
Adam Krueger, Bikash Bogati, David S. Weiss, Peter J. Yunker
Antimicrobial resistance poses a critical global health threat. For many bacterial infections, such as bacteremia, treatment can fail due to the time it takes to identify appropriate antibiotics. Current antibiotic susceptibility testing (AST) methods require 8-72 hours after isolation of infecting bacterial strains…
Ke Guo, Abderrahim Boualam, James D Manton, Christopher J Rowlands
We present a new interferometer concept called SWIFT, able to project arbitrary interference patterns constructed from small numbers of plane waves. SWIFT can control each plane wave’s orientation, intensity, polarization and phase using just a single galvanometric mirror. We demonstrate the application of SWIFT to…
Yujie Zheng, Yean Jin Lim, Hanqi Lin, Tienan Xu + 6 more
To determine the molecular and/or mechanical basis of cell migration using live cell imaging tools, it is necessary to correlate multiple 3D spatiotemporal events simultaneously. Fluorescence nanoscopy and label free nanoscale imaging can complement each other by providing both molecular specificity and structural…
Tingrui Liu, Zhongwei Ji, Yan Ding, Youfeng Zhu + 3 more
'Feng Gao' 'Yanlong Cao'] In this study, a laser interferometric sensing measurement (ISM) system based on a 4R manipulator system is developed to achieve detection of mechanical targets, which aims to realize the real-time, online detection of workpieces with high precision during processing. The 4R mobile manipulator…
Bin Cao, Guanshi Wang, Jieru Li, Alexandros Pertsinidis
Understanding cellular structure and function requires live-cell imaging with high spatio-temporal resolution and high detection sensitivity. Direct visualization of molecular processes using single-molecule/super-resolution techniques has thus been transformative. However, extracting the highest-resolution 4D…
Yisi Dong, Jinran Zhang, Chen Zhang, Haijin Fu + 4 more
In this paper, a fiber optic microprobe displacement sensor is proposed considering characteristics of micro-Michelson interference structure and its components. The principal error of micro Fabry-Perot interferometric structure is avoided, and high-precision interferometric displacement measurement is realized. The…
Jan Christoph Thiele, Emanuel Pfitzner, Philipp Kukura
Light scattering by nanoscale objects is a fundamental physical property defined by their scattering cross-section and thus polarisability. Over the past decade, a number of studies have demonstrated single molecule sensitivity, by imaging the interference between coherent scattering from the object of interest with a…
Ignacio Álvarez, Jose M. Enguita, María Frade, Jorge Marina + 1 more
'Guillermo Ojea'] On-line non-contact surface inspection with high precision is still an open problem. Laser triangulation techniques are the most common solution for this kind of systems, but there exist fundamental limitations to their applicability when high precisions, long standoffs or large apertures are needed…
Ziareena Al-Mualem, Xiaobing Chen, Joseph Shirley, Cong Xu + 1 more
BoxCARS and pump-probe geometries are common implementations of two dimensional infrared (2D IR) spectroscopy. BoxCARS is background-free, generally offering greater signal to noise ratio, which enables measuring weak vibrational echo signals. Pulse shapers have been implemented in the pump probe geometry to accelerate…
Andrew Harvie, John de Mello
The Open Polarimeter (“Opol”) is a phase-based, high-resolution laser polarimeter formed from a small number of inexpensive optomechanical parts. The complete instrument can be assembled from scratch in two days for less than US$250, using only a 3D-printer and a benchtop milling machine. However despite its low cost…