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About 10,000 papers for “Optical path”

Optical Path

Van Nostrand's Scientific Encyclopedia · 2005

Cited by 0

Optical Path Theory

Rafael G González-Acuña, Héctor A Chaparro-Romo · 2022

This book is mostly based in an equation that was recently published. The equation is the general formula for adaptive optics mirrors, which was published in January 2021—General mirror formula for adaptive optics, <i>Applied Optics</i> 60(2). The book addresses the introductory topics, the solution (general formula for adaptive optics mirrors), the implications, and the potential applications. <i>Optical Path Theory: Fundamentals to freeform adaptive optics</i> focuses on the potential to find analytical close form solutions using optical path theory to solve and design adaptive optics systems, with a thorough introduction to the subject. The book moves into exploring optical systems in the plane. Step-by-step equations provide each of these systems to plot their waves, emphasising the mathematical derivations. With a mathematical presentation of concepts, this book is complete with details, problems, solutions, and a multitude of useful examples. Ideal for graduates in optics. Part of <a href=" https://iopscience.iop.org/bookListInfo/emerging-technologies-in-optics-and-photonics#series">IOP Series in Emerging Technologies in Optics and Photonics</a>. Key features • Provides an introduction of the three main axioms implemented in optical path theory. • Includes worked examples and problems in each chapter. • Presents codes and algorithms. • Details the physical concepts and mathematical tools needed to understand eikonal and the closed form solution of stigmatic optical systems. • Contains Mathematica throughout.

Cited by 4Open access

optical path difference

2024

Citation: 'optical path difference' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08653 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial usage of the compendium should be directed to IUPAC.

Cited by 0

Optical path diagram.

Lijin Lian (11250434), Xuejuan Hu (11250437), Zhenhong Huang (11250440) et al. · Figshare · 2021

&lt;p&gt;From the light source (LED), the light line passes the fast filter wheel (F1) and lens (L1) and reaches the samples. The light focuses on and illuminates the samples through an objective (OL). PM is the pulse modulator, which controls the motored stage step by step. The light beam is adjusted through a tube lens (TL) and beam splitter (BS). A line of the light illuminates the sample region in the same position as the resulting emission light through a diorchic mirror (DM) and the imaging spectroscope, and finally reaches the CCD camera (CM).&lt;/p&gt;

Cited by 0Open access

Infrared Optical Path Adjustment Method for Common-Path Optical Coherence Tomography

Yan Jun Li, Zhong Dong Liu, Yi Nan Zhang et al. · Advanced materials research · 2012

A new, common-path, in-axis concentric beam-splitting Michelson interferometer is demonstrated for optical coherence tomography (OCT), which can be used to perform high-resolution cross-sectional in vivo and in situ imaging of biological tissues. A piece of glass tube with its inner diameter smaller than the beam-width of the collimated light is used to split the light into a reference and sample beam. In order to obtain the optimal spectral interferogram of this OCT system, an infrared optical path adjustment method was introduced in this paper.

Cited by 0

Imaging optical path occlusion.

Pi Yuan (18452433), Chen Li (54018), Peng Tang (216415) et al. · Figshare · 2024

&lt;p&gt;(a) Inappropriate working distance causes the imaging optical path to be obscured by the bottleneck. (b) Inappropriate lens focal length causes the imaging optical path to be obscured by the bottleneck. (c) Full imaging is possible, but due to inappropriate focal length or working distance, the accuracy cannot reach 0.05&lt;i&gt;mm&lt;/i&gt;.&lt;/p&gt;

Cited by 0Open access

OTDR optical path analyzer

Šimková, Barbora · Brno University of Technology Digital Library (Brno University of Technology) · 2023

Cílem této diplomové práce byl teoretický rozbor problematiky OTDR, rozbor komponentů zařízení OTDR a také základních parametrů tohoto zařízení. Součástí diplomové práce je i teoretický rozbor odrazů, rozptylů a jednotlivých typů konektorů. V rámci praktické části byl proveden návrh zapojení pro měření metodou OTDR a jeho následná realizace. Zapojení bylo realizováno s vývojovou deskou Red Pitaya a laserem Koheron. Dále bylo vytvořeno také zapojení pro měření přímou metodou. Ve vývojovém prostředí LabView byl vytvořen program včetně grafického uživatelského rozhraní. Navržena byla také laboratorní úloha, která slouží k základnímu pochopení problematiky měření OTDR.

Cited by 0

Modelling of optical path.

Bohac, Leos, Ceske vysoke uceni technicke v Praze, Praha (Czech Republic) · OpenGrey (Institut de l'Information Scientifique et Technique) · 2001

Cited by 0Open access

Measurements of direct path and folded path optical scintillation path weightings

Constantine, Alfred Guy · Calhoun: The Naval Postgraduate School Institutional Archive (Naval Postgraduate School) · 1983

A theoretical prediction by Dr. Avihu Ze'evi of the relative contribution to the optical scintillation by different points along the path was described by a weight function for direct and exact folded path spherical wave sources. In an effort to verify this prediction a turbulence chamber was built to allow a controlled turbulence source to be moved and measured at different path positions in conjunction with scintillations measurements. The experimental results follow Dr. Ze'evi's general pattern but both sources are less weighted at the detector end than predicted and the folded path is more heavily weighted at the target end than predicted.

Cited by 0Open access

Variable-bandwidth optical paths: comparison between optical code-labeled path and OCDM path

Shaowei Huang, Student Member, Ken-ichi Baba et al. · 2006

Abstract—In a conventional wavelength-routed network, the bandwidth of one wavelength is considered as the minimum granularity for a given connection request. Therefore, no multiple connection requests can be accepted by using a single wavelength simultaneously. This may cause inefficiency in the bandwidth utilization in some cases. In this paper, the focus is on the variablebandwidth approach called an optical code (OC)-based path to improve this bandwidth utilization. The concept of OC-enabling paths is investigated, which shows its potential in resolving the above granularity problem inherent to the wavelength-routed network. First, two optical paths, called the OC-labeled and OC division multiplexing (OCDM) paths, are proposed. The former is based upon label switching and statistical multiplexing, while the latter is based upon OCDM. Next, OC-label and OCDM optical cross connects are described to support OC-labeled and OCDM paths, respectively. In this paper, a coherent time-spread OC is adopted. A two-state flow-fluid traffic model is addressed and regarded as the general analysis model. Finally, the performances between these proposed paths are qualified and compared, and numerical results show that the OC-labeled path outperforms the OCDM path under short burst duration time, whereas the OCDM path, provides higher flexibility than the OC-labeled path, owing to its independence of burst duration time. Index Terms—Optical code division multiplexing (OCDM) optical cross connect (OXC), optical code division multiplexing (OCDM) path, optical code (OC)-labeled optical cross connect (OXC), optical code (OC)-labeled path, variable-bandwidth optical path. I.

Cited by 0

Optofluidic variable optical path modulator

Qiong‐Hua Wang, Xiao Liang, Chao Liu et al. · Scientific Reports · 2019

The optofluidic devices including optofluidic lens, optical switch and liquid prism have found widespread applications in imaging, optical communication and lighting. Here, we report a novel optofluidic device called optofluidic variable optical path modulator. Our proposed modulator consists of two main chambers. The two chambers are connected by two tubes to form a closed-loop fluidic system. Two immiscible liquids are filled into the two chambers and form two L-L interfaces. A transparent sheet is placed between one L-L interface to get flat interface. When a voltage is applied on the device, the flat interface can move up and down. Thus, variable optical path can be obtained by applying a voltage. To prove the concept, we fabricate an optofluidic device whose largest movable distance of L-L interface is ~7.5 mm and the optical path length change is ~1.15 mm. The proposed optofluidic device has potential applications in imaging, adaptive optics, optical detection and so on.

Cited by 13Open access

Optical path change element and optical coupling device

TATEYAMA, TADAO · Institutional Repository of Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (Xian Institute of Optics and Precision Mechanics) · 2019

An optical path change element includes a first facet that receives incidence of light beams outgoing from outgoing portions of a first optical element, a second facet that has a predetermined radius of curvature and is provided with a reflection face to reflect the incident light beams from the first facet, and a third facet causing the light beams reflected on the reflection face to outgo to the incident portions of a second optical element. The second facet has protruded faces spaced from the reflection faces. Virtual planes tangent to the protruded faces are defined. At least one of the virtual planes covers the reflection face without being tangent to the reflection face and being parallel with a tangent plane at an arbitrary point of the reflection face.

Cited by 0

Optical turbulence path integration: methodology

Robert I. Reznik, Matthew Bold · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000

Presently the propagation models used to assess ABL performance employ an onionskin atmosphere. Onionskin atmospheres ignore the profound horizontal intermittency in C<SUP>n</SUP><SUP>2</SUP> found in experiment. The problems associated with modeling optical turbulence over shallow slant paths using balloon and aerothermal point measurements are presented. We describe a method developed by the authors, which integrates the horizontal intermittency evident in the aerothermal data with the balloon profiles. This methodology takes randomly drawn segments of the aerothermal data to provide the intermittency along a smoothed balloon profile. An Independent and Identically Distributed (IID) process describes this methodology. To date all methods known by the authors utilize an IID process to account for intermittency. However, IID processes fail to fully appreciate the information contained in a continuous stream of aerothermal data. We present a methodology that utilizes time series analysis of horizontal aerothermal segments. The result of the time-series methodology is that the distribution of expected integrated turbulence levels is broader than those calculated previously. This suggests that in reality there will be a greater probability that a beam will experience sustained periods of extreme turbulence along the path, strong or weak, than would be predicted using an IID model.

Cited by 1

Revealing Genuine Optical-Path Entanglement

Do Rego Monteiro, Fernando Henrique, Caprara Vivoli, Valentina, Barbosa Dos Santos Guerreiro, Thiago et al. · Archive ouverte UNIGE (University of Geneva) · 2015

How can one detect entanglement between multiple optical paths sharing a single photon? We address this question by proposing a scalable protocol, which only uses local measurements where single photon detection is combined with small displacement operations. The resulting entanglement witness does not require postselection, nor assumptions about the photon number in each path. Furthermore, it guarantees that entanglement lies in a subspace with at most one photon per optical path and reveals genuinely multipartite entanglement. We demonstrate its scalability and resistance to loss by performing various experiments with two and three optical paths. We anticipate applications of our results for quantum network certification.

Cited by 0

Non-common path optical aberrations.

Raphael Jorand (169054), Gwénaële Le Corre (169060), Jordi Andilla (169066) et al. · Figshare · 2015

&lt;p&gt;(a) Recorded wavefront in the imaging camera focal plane corresponding to the imaging path aberrations. (b) Reference recorded wavefront in the HSWF sensor path after correction of the imaging path aberrations corresponding to the differential aberrations. (c) Graph showing the 3&lt;sup&gt;rd&lt;/sup&gt; and 5&lt;sup&gt;th&lt;/sup&gt; order of Zernike coefficients of (a) and (b).&lt;/p&gt;

Cited by 0Open access

Common-path multimodal optical microscopy

Chandra S. Yelleswarapu, Marla Tipping, Sri‐Rajasekhar Kothapalli et al. · Optics Letters · 2009

We have developed a common-path multimodal optical microscopy system that is capable of using a single optical source and a single camera to image amplitude, phase, and fluorescence features of a biological specimen. This is achieved by varying either contrast enhancement filters at the Fourier plane and/or neutral density/fluorescence filters in front of the CCD camera. The feasibility of the technique is demonstrated by obtaining brightfield, fluorescence, phase-contrast, spatially filtered, brightfield+fluorescence, phase+fluorescence, and edge-enhanced+fluorescence images of the same Drosophila embryo without the need for image registration and fusion. This comprehensive microscope has the capability of providing both structural and functional information and may be used for applications such as studying live-cell dynamics and in high throughput microscopy and automated microscopy.

Cited by 10