Optics continuum最新文献

Simple, cost-effective, highly stable solid-state photoluminescence standard for fluorometer calibration in low-resource settings. 简单，具有成本效益，高度稳定的固态光致发光标准在低资源设置荧光计校准。

IF 1.1

Optics continuum Pub Date : 2024-11-15 Epub Date: 2024-10-31 DOI: 10.1364/OPTCON.534029

Joshua Eger, Mark Bailly, Jennifer Blain Christen

{"title":"Simple, cost-effective, highly stable solid-state photoluminescence standard for fluorometer calibration in low-resource settings.","authors":"Joshua Eger, Mark Bailly, Jennifer Blain Christen","doi":"10.1364/OPTCON.534029","DOIUrl":"10.1364/OPTCON.534029","url":null,"abstract":"The proposed photoluminescence calibration standard comprises a solid-state phosphor film, neutral density gel filter(s), and a 3D-printed optomechanical cartridge. The proposed standard demonstrated exceptional photostability; photoluminescence did not deviate from the baseline more than 1.27% under 5 minutes of continuous illumination. Remarkably, there was no measurable degradation over a 3-year study. Precise photoluminescence intensity modulation was accomplished with neutral density gel filters (R2 > 0.9982) and optical apertures (R2 > 0.9970). A model for photoluminescence intensity as a function of neutral-density filter and optical aperture parameters yielded a mean percentage error (MPE) of 2.79%, indicating high precision. Inter-sample variability was low, with a mean coefficient of variation (CV) of 1.32%. Mean CV across 24 channels decreased from 11.88% to 1.51% following multi-point calibration of multichannel point-of-care (POC) fluorometers. Cost analysis revealed a per-unit cost between $0.49 to $1.80. This work suggests that the proposed calibration standards provide a cost-effective, highly stable solution for reliable fluorometer calibration in low-resource settings.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":"3 11","pages":"2060-2077"},"PeriodicalIF":1.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11844768/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143484928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Normalized weighted cross correlation for multi-channel image registration. 多通道图像配准的归一化加权互相关。

IF 1.4

Optics continuum Pub Date : 2024-05-15 Epub Date: 2024-04-16 DOI: 10.1364/OPTCON.525065

Gastón A Ayubi, Bartlomiej Kowalski, Alfredo Dubra

{"title":"Normalized weighted cross correlation for multi-channel image registration.","authors":"Gastón A Ayubi, Bartlomiej Kowalski, Alfredo Dubra","doi":"10.1364/OPTCON.525065","DOIUrl":"10.1364/OPTCON.525065","url":null,"abstract":"The normalized cross-correlation ( <math><mi>N</mi> <mi>C</mi> <mi>C</mi></math> ) is widely used for image registration due to its simple geometrical interpretation and being feature-agnostic. Here, after reviewing <math><mi>N</mi> <mi>C</mi> <mi>C</mi></math> definitions for images with an arbitrary number of dimensions and channels, we propose a generalization in which each pixel value of each channel can be individually weighted using real non-negative numbers. This generalized normalized weighted cross-correlation ( <math><mi>N</mi> <mi>W</mi> <mi>C</mi> <mi>C</mi></math> ) and its zero-mean equivalent ( <math><mi>Z</mi> <mi>N</mi> <mi>W</mi> <mi>C</mi> <mi>C</mi></math> ) can be used, for example, to prioritize pixels based on signal-to-noise ratio. Like a previously defined <math><mi>N</mi> <mi>W</mi> <mi>C</mi> <mi>C</mi></math> with binary weights, the proposed generalizations enable the registration of uniformly, but not necessarily isotropically, sampled images with irregular boundaries and/or sparse sampling. All <math><mi>N</mi> <mi>C</mi> <mi>C</mi></math> definitions discussed here are provided with discrete Fourier transform ( <math><mi>D</mi> <mi>F</mi> <mi>T</mi></math> ) formulations for fast computation. Practical aspects of <math><mi>N</mi> <mi>C</mi> <mi>C</mi></math> computational implementation are briefly discussed, and a convenient function to calculate the overlap of uniformly, but not necessarily isotropically, sampled images with irregular boundaries and/or sparse sampling is introduced, together with its <math><mi>D</mi> <mi>F</mi> <mi>T</mi></math> formulation. Finally, examples illustrate the benefit of the proposed normalized cross-correlation functions.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":"3 5","pages":"649-665"},"PeriodicalIF":1.4,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12448653/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145115142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-photon absorption and fluorescence of cadmium sulfide 硫化镉的双光子吸收和荧光

Optics continuum Pub Date : 2024-01-11 DOI: 10.1364/optcon.514082

Jacob Goranson, Greg Taft

引用次数: 0

Broadband and precise characterization ofcomb-resonance detuning of microresonatorfrequency combs based on coherent detection 基于相干检测的微谐振器频率梳共振失谐的宽带和精确表征

Optics continuum Pub Date : 2024-01-08 DOI: 10.1364/optcon.511962

Ayaka Shoda, T. Tetsumoto, Kentaro Furusawa, Kazuhiro Imai, Motonobu Kourogi, Norihiko Sekine

引用次数: 0

A high-performance plasmonic metasurface sensor by triangular nano-structures 三角形纳米结构的高性能等离子体元表面传感器

Optics continuum Pub Date : 2023-12-21 DOI: 10.1364/optcon.509803

E. Jafari, M. Mansouri-Birjandi, Alireza Tavousi

引用次数: 0

Demonstration of a Terahertz Integrated PlanarNetwork Synthesis Filter 太赫兹集成平面网络合成滤波器演示

Optics continuum Pub Date : 2023-12-21 DOI: 10.1364/optcon.505492

Ali Dehghanian, Mohsen Haghighat, Thomas Darcie, Levi Smith

引用次数: 0

Feasibility of simultaneous multi-element analysis of quartz sand with impurities by calibration-free laser-induced breakdown spectroscopy and its potential for guiding glass manufacturing 用免校准激光诱导击穿光谱法同时分析含杂质石英砂的多元素的可行性及其指导玻璃制造的潜力

Optics continuum Pub Date : 2023-12-20 DOI: 10.1364/optcon.513626

Tengfei Sun, Shaoying Ke, Wentao Sui, Wenhao Zhang, Peng Lu, Dongfeng Qi, Bing Yang, Juan Wei, Y. Wu, Hongyu Zheng

引用次数: 0

Krypton tagging velocimetry in the plume of a plasma hollow cathode 等离子体空心阴极羽流中的氪标记测速仪

Optics continuum Pub Date : 2023-12-14 DOI: 10.1364/optcon.503138

Jacob Gottfried, A. Yalin

引用次数: 0

Beam quality improvement in a linear ZPG OPOpumped by a Q-switched compact high-powerHo³+:YAG laser 由 Q 开关紧凑型高功率 Ho³+:YAG 激光器泵浦的线性 ZPG OPO 的光束质量改进

Optics continuum Pub Date : 2023-12-11 DOI: 10.1364/optcon.505473

Katharina Goth, Madeleine Eitner, M. Griesbeck, Marius Rupp, D. Lorenz, Johannes Deutsch, Marc Eichhorn, C. Kieleck

引用次数: 0

Wireless data transmission in the 560-GHz band utilizing terahertz wave generated through photomixing of a pair of distributed feedback lasers injection-locking to a Kerr micro-resonator soliton comb 利用一对分布式反馈激光器注入锁定到克尔微谐振子孤子组合的光混合产生的太赫兹波，在 560 GHz 波段进行无线数据传输

Optics continuum Pub Date : 2023-12-07 DOI: 10.1364/optcon.504431

Y. Tokizane, Shota Okada, Takumi Kikuhara, H. Kishikawa, Y. Okamura, Yoshihiro Makimoto, K. Nishimoto, T. Minamikawa, Eiji Hase, Junichi Fujikata, Masanobu Haraguchi, A. Kanno, S. Hisatake, N. Kuse, Takeshi Yasui

引用次数: 0