Optics and Lasers in Engineering最新文献_第2页

A decoupling method based on phase-shift calculation by encoding color fringe pattern 基于相移计算的彩色条纹编码解耦方法

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108658

引用次数: 0

A blood pressure measurement system using fiber optic-based Fabry-Perot interferometer 使用基于光纤的法布里-珀罗干涉仪的血压测量系统

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108667

{"title":"A blood pressure measurement system using fiber optic-based Fabry-Perot interferometer","authors":"","doi":"10.1016/j.optlaseng.2024.108667","DOIUrl":"10.1016/j.optlaseng.2024.108667","url":null,"abstract":"<div><div>In this work, the development of a blood pressure (BP) system based on a fiber optic Fabry-Perot interferometer (FFPI) has been investigated. The developed system is consisted of 2 main parts: FFPI structure, and sensing probe, respectively. An aluminum-coated mirror and latex thin film have been used as a reflector and elastic material of the sensing probe. Moreover, the peak detection and also fringe counting techniques have been applied to convert the number of fringes to blood pressure and heart rate values. In addition, a standard digital sphygmomanometer has been utilized as a reference instrument for comparing the performance of FFPI sensor. Eighty-six volunteers aged 21 - 50 years old have been chosen to collect the experimental data. However, the sensing probe has been placed on right side of the neck, and a standard digital sphygmomanometer on the upper left arm of the volunteers. The results indicated that the developed system has ability to measure systolic blood pressure (SBP), and diastolic blood pressure (DBP) in the range of 91 to 128 mmHg, and 62 to 85 mmHg, respectively. Moreover, the heart rate (HR) has also been exploited in the range of 48 to 102 beats/min. By comparing the experimental results with the reference instrument, it found that the average percentage error from the blood pressure measurements is 2.84 %. Furthermore, the developed sensor has a sensitivity of 56.88 nm/mmHg. This implies that the developed system has the efficiency to measure vital signs and blood pressure with cuffless, low-cost, and non-invasive.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wavefront sensing and optical surface measurement method based on reference light modulation 基于参考光调制的波前传感和光学表面测量方法

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108659

引用次数: 0

Tailoring freeform off-axis reflective beam shaping systems 定制自由形态离轴反射光束整形系统

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108665

引用次数: 0

Measurement of lens parameters based on Shack-Hartmann wavefront sensor 基于夏克-哈特曼波前传感器的透镜参数测量

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108666

{"title":"Measurement of lens parameters based on Shack-Hartmann wavefront sensor","authors":"","doi":"10.1016/j.optlaseng.2024.108666","DOIUrl":"10.1016/j.optlaseng.2024.108666","url":null,"abstract":"<div><div>The focal length, radius of curvature, and refractive index are key parameters of a spherical lens. Here, an approach for measuring lens parameters based on the Shack-Hartmann wavefront sensor (SHS) is proposed. Firstly, the position of the reference point for measuring focal length is determined by the figure-of-merit function, called the least square sum of centroids shifts (LSSCS), from the spot array formed by the microlens array of SHS. The focal length is estimated by measuring radii of curvatures of two spherical waves. Each spherical wave is caused by the distance between the focal point of the lens and the determined reference. Secondly, the radius of curvature is the difference between two coordinate locations of the lens. Each location, corresponding to a collimated beam reflected from the lens, is determined by the figure-of-merit function LSSCS. Thirdly, the refractive index can be further estimated by lens maker's equation through the measured focal length and radius of curvature. A positive and a negative lens are both tested by the proposed method. Experimental results show that the lens parameters measured by the proposed method are in good agreement with the nominal values. The proposed method does not require wavefront reconstruction, and is simple, accurate and noise-resistant.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uncertainty-assisted virtual immunohistochemical detection on morphological staining via semi-supervised learning 通过半监督学习对形态染色进行不确定性辅助虚拟免疫组化检测

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108657

{"title":"Uncertainty-assisted virtual immunohistochemical detection on morphological staining via semi-supervised learning","authors":"","doi":"10.1016/j.optlaseng.2024.108657","DOIUrl":"10.1016/j.optlaseng.2024.108657","url":null,"abstract":"<div><div>Tumor suppressor gene TP53 plays a crucial role in cancer diagnosis and prognosis. The gene encodes the tumor suppressor protein p53, which can be identified through immunohistochemical (IHC) staining in various cancers, including gastric carcinoma. However, IHC staining is more costly and therefore not as prevalent as routine hematoxylin-eosin (H&E) staining. In this study, we present a semi-supervised learning-based approach for immunological detection (SSID) of TP53 mutation directly on H&E-stained gastric tissue sections, intending to improve gastric cancer diagnosis. SSID is trained on a small set of annotated image pairs and a larger unannotated dataset of H&E-stained images. It can detect the regions showing strong p53 expression, indicating TP53 mutation, and we validate the accuracy of our approach through both qualitative assessment (pathologists' average score of 2.22/3) and quantitative evaluation (e.g., averaged mean Intersection-over-Union of 0.73). Moreover, we introduce Bayesian uncertainty to assess the credibility of the detected masks, aiming to prevent misdiagnosis and inappropriate treatment. Our results demonstrate that SSID can circumvent the expensive and laborious IHC staining procedures and enable the diagnosis and prognosis of gastric cancer through immunological detection of TP53 mutation.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Edge enhancement and feature modulation based network for light field depth estimation 基于边缘增强和特征调制的光场深度估算网络

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI: 10.1016/j.optlaseng.2024.108662

{"title":"Edge enhancement and feature modulation based network for light field depth estimation","authors":"","doi":"10.1016/j.optlaseng.2024.108662","DOIUrl":"10.1016/j.optlaseng.2024.108662","url":null,"abstract":"<div><div>Estimating depth from light field images is a critical issue in light field applications. While learning-based methods have made significant strides in light field depth estimation, achieving high accuracy and speed simultaneously remains a major challenge. This paper proposes a light field depth estimation network based on edge enhancement and feature modulation, which significantly improves depth estimation results by emphasizing inter-view correlations while preserving image edge features. Specifically, to prioritize edge details, we introduce an Edge-Enhanced Cost Constructor (EECC) that integrates edge information with existing cost constructors to improve depth estimation performance in complex areas. Furthermore, most light field depth estimation networks utilize only sub-aperture images (SAIs) without considering the inherent angular information in macro-pixel image (MacPI). To address this limitation, we propose the MacPI-Guided Feature Modulation (MGFM) module, which leverages angular information between different views in MacPI to modulate features at each view. Experimental results show that our method not only performs excellently on synthetic datasets but also demonstrates outstanding generalization on real-world datasets, achieving a better balance between accuracy and computation speed.</div></div>","PeriodicalId":49719,"journal":{"name":"Optics and Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parallel multiplexing optical spatial differentiation based on a superposed complex amplitude filter 基于叠加复振幅滤波器的并行复用光学空间分辨技术

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-29 DOI: 10.1016/j.optlaseng.2024.108669

引用次数: 0

3D geometric attenuation factor for discrete Gaussian microsurfaces 离散高斯微表面的三维几何衰减系数

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-29 DOI: 10.1016/j.optlaseng.2024.108656

引用次数: 0

Selective manipulation of particles for multifunctional optical fiber tweezers with wavelength division multiplexing technology 利用波分复用技术实现多功能光纤镊子对颗粒的选择性操纵

IF 3.5 2区工程技术

Optics and Lasers in Engineering Pub Date : 2024-10-29 DOI: 10.1016/j.optlaseng.2024.108661

引用次数: 0