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Optical von Neumann measurement [PDF]

open access: yesPhysics Letters A, 1997
We present an optical scheme that realizes the standard von Neumann measurement model, providing an indirect measurement of a quadrature of the field with controllable Gaussian state-reduction.
Bencheikh   +12 more
core   +7 more sources

Optical Measurements [PDF]

open access: yesIEEE Instrumentation & Measurement Magazine, 2021
Optical sensing techniques are used in a large variety of application fields where fast, portable, remote-sensing, low-cost and/or rugged devices are required for detection, identification, and measurements of a variety of parameters. Sensors based on optical fibers are exploited in demanding applications, including pharmaceutical research, medical ...
Cennamo N., Jorge P. A. S.
openaire   +1 more source

Modeling and validation of mechanoluminescent strain sensing mechanism at quasi-static loading rates

open access: yesMaterials & Design, 2023
Mechanoluminescence (ML) sensors offer full-field strain/stress measurements and have the advantages of easy implementation, non-invasiveness, and low cost.
Bing Chen   +5 more
doaj   +1 more source

An Accurate and Efficient Supervoxel Re-Segmentation Approach for Large-Scale Point Clouds Using Plane Constraints

open access: yesRemote Sensing, 2023
The accurate and efficient segmentation of large-scale urban point clouds is crucial for many higher-level tasks, such as boundary line extraction, point cloud registration, and deformation measurement.
Baokang Lai   +4 more
doaj   +1 more source

Calibration Method for Airborne Infrared Optical Systems in a Non-Thermal Equilibrium State

open access: yesSensors, 2023
Airborne infrared optical systems equipped with multiple cooled infrared cameras are commonly utilized for quantitative radiometry and thermometry measurements.
Mingyuan Dong   +6 more
doaj   +1 more source

Research on hole edge crack monitoring based on optical fiber gratings and BP neural network

open access: yesHangkong gongcheng jinzhan, 2023
The hole edge crack monitoring of metal structures with holes is of great significance for ensuring flight safety and enhancing the reliability of aircraft structures.
YU Chong   +4 more
doaj   +1 more source

Low-cost resonant cavity Raman gas probe for multi-gas detection [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2014
Raman based gas sensing can be attractive in several industrial applications, due to its multi-gas sensing capabilities and its ability to detect O2 and N2.
Thorstensen J.   +4 more
doaj   +1 more source

An Efficient Method for Laser Welding Depth Determination Using Optical Coherence Tomography

open access: yesSensors, 2023
Online monitoring of laser welding depth is increasingly important, with the growing demand for the precise welding depth in the field of power battery manufacturing for new energy vehicles.
Guanming Xie   +6 more
doaj   +1 more source

Analysis of Polarization Detector Performance Parameters on Polarization 3D Imaging Accuracy

open access: yesSensors, 2023
Three-dimensional (3D) reconstruction of objects using the polarization properties of diffuse light on the object surface has become a crucial technique.
Pengzhang Dai   +5 more
doaj   +1 more source

All Fiber Mach–Zehnder Interferometer Based on Intracavity Micro-Waveguide for a Magnetic Field Sensor

open access: yesApplied Sciences, 2021
A magnetic fluid (MF)-based magnetic field sensor with a filling-splicing fiber structure is proposed. The sensor realizes Mach–Zehnder interference by an optical fiber cascade structure consisting of single mode fiber (SMF), multimode fiber (MMF), and ...
Maoqing Chen, Qifeng Liu, Yong Zhao
doaj   +1 more source

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