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Optically pumped magnetometers usually rely on optical pumping using circularly- or linearly-polarized light. We study here zero-field magnetometers pumped with elliptically-polarized light, preparing both atomic orientation and alignment…

原子物理 · 物理学 2022-05-04 Gwenael Le Gal , Agustin Palacios-Laloy

We introduce an improved microwave calibration method for use in a cryogenic environment, based on a traditional three-standard calibration, the Thru-Reflect-Line (TRL) calibration. The modified calibration method takes advantage of…

仪器与探测器 · 物理学 2013-03-27 Jen-Hao Yeh , Steven M. Anlage

Double-pass polarimetry measures the polarization properties of a sample over a range of polar angles and all azimuths. Here, we present a tolerance analysis of all the optical elements in both the calibration and measurement procedures to…

光学 · 物理学 2020-08-18 Yimin Yu , Nabila Baba-Ali , Gregg M Gallatin

Estimating camera intrinsic parameters without prior scene knowledge is a fundamental challenge in computer vision. This capability is particularly important for applications such as autonomous driving and vehicle platooning, where…

计算机视觉与模式识别 · 计算机科学 2025-09-23 Gregory Schroeder , Mohamed Sabry , Cristina Olaverri-Monreal

Methods are presented for calibrating the hadron calorimeter system of the CMS detector at the LHC. The hadron calorimeters of the CMS experiment are sampling calorimeters of brass and scintillator, and are in the form of one central…

仪器与探测器 · 物理学 2020-05-07 CMS Collaboration

There are many geometric calibration methods for "standard" cameras. These methods, however, cannot be used for the calibration of telescopes with large focal lengths and complex off-axis optics. Moreover, specialized calibration methods…

The triaxial-vectorial magnetic field measurement method based on the quasi-steady-state solution of Bloch equation for SERF atomic magnetometry is firstly proposed by S. Seltzer and M. Romalis in 2004, which introduces dual-axis…

仪器与探测器 · 物理学 2020-01-27 J. N. Qin , X. Zhang , C. Chen , Y. Z. Wang

With the widespread application of industrial robots, the problem of absolute positioning accuracy becomes increasingly prominent. To ensure the working state of the robots, researchers commonly adopt calibration techniques to improve its…

机器人学 · 计算机科学 2023-04-25 Tinghui Chen , Shuai Li

The dual-resonant enhancement of mechanical and optical response in cavity optomechanical magnetometers enables precision sensing of magnetic fields. In previous working prototypes of such magnetometers, a cavity optomechanical system is…

A properly calibrated longitudinal magnetograph is an instrument that measures circular polarization and gives an estimation of the magnetic flux density in each observed resolution element. This usually constitutes a lower bound of the…

太阳与恒星天体物理 · 物理学 2015-05-27 A. Asensio Ramos , M. J. Martinez Gonzalez , R. Manso Sainz

A method is presented for calibrating the higher eigenmodes (resonance modes) of atomic force microscopy cantilevers that can be performed prior to any tip-sample interaction. The method leverages recent efforts in accurately calibrating…

介观与纳米尺度物理 · 物理学 2016-08-03 Aleksander Labuda , Marta Kocun , Tim Walsh , Jieh Meinhold , Tania Proksch , Waiman Meinhold , Martin Lysy , Roger Proksch

This paper studies the nonlinear evolution of magnetic field turbulence in proximity of steady ideal MHD configurations characterized by a small electric current, a small plasma flow, and approximate flux surfaces, a physical setting that…

等离子体物理 · 物理学 2024-09-12 Naoki Sato , Michio Yamada

Geometric calibration of cameras and projectors is an essential step that must be performed before any imaging system can be used. There are many well-known geometric calibration methods for calibrating systems comprised of multiple…

计算机视觉与模式识别 · 计算机科学 2024-10-25 Tomislav Petkovic , Simone Gasparini , Tomislav Pribanic

Fusion of heterogeneous extroceptive sensors is the most effient and effective way to representing the environment precisely, as it overcomes various defects of each homogeneous sensor. The rigid transformation (aka. extrinsic parameters)…

计算机视觉与模式识别 · 计算机科学 2017-03-21 Qinghai Liao , Ming Liu , Lei Tai , Haoyang Ye

Calibration refers to the estimation of unknown parameters which are present in computer experiments but not available in physical experiments. An accurate estimation of these parameters is important because it provides a scientific…

统计方法学 · 统计学 2019-03-21 Chih-Li Sung , Ying Hung , William Rittase , Cheng Zhu , C. F. Jeff Wu

The M\"ONCH hybrid pixel detector, with a 25 \textmu m pixel pitch and fast charge-integrating readout, has demonstrated subpixel resolution capabilities for X-ray imaging and deep learning-based electron localization in electron…

We develop a lower critical field (Hc1) measurement system using the third-harmonic response of an applied AC magnetic field from a solenoid coil positioned above a superconducting sample. Parameter Hc1 is measured via detection of the…

加速器物理 · 物理学 2020-01-29 Hayato Ito , Hitoshi Hayano , Takayuki Kubo , Takayuki Saeki

We present and analyze methods for the kinematic and kinetostatic calibration of, typically, wrist mounted force/torque sensors in robotics. The algorithms are based on matrix factorization and require no special equipment. The only…

机器人学 · 计算机科学 2019-04-15 Fredrik Bagge Carlson

We report on an all-optical magnetometric technique based on nonlinear magneto-optical rotation with amplitude-modulated light. The method enables sensitive magnetic-field measurements in a broad dynamic range. We demonstrate the…

原子物理 · 物理学 2009-11-13 S. Pustelny , A. Wojciechowski , M. Gring , M. Kotyrba , J. Zachorowski , W. Gawlik

Recent measurements of the Cosmic Microwave Background $B$-mode polarization power spectrum by the BICEP2 and POLARBEAR experiments have demonstrated new precision tools for probing fundamental physics. Regardless of origin, the fact that…

宇宙学与河外天体物理 · 物理学 2016-02-02 Jonathan Kaufman , Brian Keating , Brad Johnson