International Journal of Optics最新文献_第8页

Multiposition Rotation Interference Absolute Measurement Method for High-Precision Optical Component Surfaces 高精度光学元件表面多位置旋转干涉绝对测量方法

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-09-14 DOI: 10.1155/2021/6621939

Xueliang Zhu, F. Nie, Bingcai Liu, Ruikun Liu, A. Tian

{"title":"Multiposition Rotation Interference Absolute Measurement Method for High-Precision Optical Component Surfaces","authors":"Xueliang Zhu, F. Nie, Bingcai Liu, Ruikun Liu, A. Tian","doi":"10.1155/2021/6621939","DOIUrl":"https://doi.org/10.1155/2021/6621939","url":null,"abstract":"Modern optical engineering requires increasingly sophisticated interferometry methods capable of conducting subnanometer scale measurements of the large aperture, high-precision optical component surfaces. However, the accuracy of interferometry measurement is limited to the accuracy with which the surface of the reference mirror employed in the interferometer system is known, and the influence of gravity-induced deformation cannot be ignored. This is addressed in the present work by proposing a three-flat testing method based on multiposition rotation interference absolute surface measurement technology that combines the basic theory of N-position rotation with the separability of surface wavefront functions into sums of even and odd functions. These functions provide the rotational symmetric components of the wavefront, which then enables the absolute surface to be reconstructed based on the N-position rotation measurements. In addition, we propose a mechanical clamping combined with computational method to compensate for the gravity-induced deformations of the flats in the multiposition rotation absolute measurements. The high precision of the proposed absolute surface measurement method is demonstrated via simulations. The results of laboratory experiments indicate that the combination compensation method provides the high-precision surface reconstruction outcomes. The present work provides an important contribution for supporting the interferometry measurement of large aperture, high-precision optical component surfaces.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42050464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Terahertz Absorption Characteristics of the Sodium Carboxymethyl Cellulose Colloid Based on Microfluidic Technology 基于微流控技术的羧甲基纤维素钠胶体的太赫兹吸收特性

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-09-04 DOI: 10.1155/2021/5555325

Chenxin Ding, Bo Su, Guoyang Wang, Qinghao Meng, Jiahui Wang, Cunlin Zhang

引用次数: 0

Investigating the Selective Control of Photoassociation of Yb2 Yb2光缔合的选择性控制研究

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-09-04 DOI: 10.1155/2021/6859330

Junxia Cheng, B. Tian, Siyu Li, Jia Wang, Shenjiang Wu

{"title":"Investigating the Selective Control of Photoassociation of Yb2","authors":"Junxia Cheng, B. Tian, Siyu Li, Jia Wang, Shenjiang Wu","doi":"10.1155/2021/6859330","DOIUrl":"https://doi.org/10.1155/2021/6859330","url":null,"abstract":"The selective control of photoassociation of Yb2 is investigated in theory. Based on ab initio to rationalize Franck–Condon filtering, the optimal target states of photoassociation have been obtained. The corresponding vibrational transitions from X1Σ+g to the excited state (A1Σu+, B1Πu, C1Σu+, and D1Πu) are \u0000 \u0000 \u0000 \u0000 v\u0000 \u0000 \u0000 ′\u0000 \u0000 \u0000 \u0000 = 23, 50, 55, and 0, respectively. By using quantum wave packet dynamic methods, we calculated the yields with time evaluation for the selected target states. The projections of time-dependent wave functions of initial states on the target vibrational eigenstates reflected the synthetic yields of Yb2. For target A1Σu+, we used Gaussian pulse to make the yield of \u0000 \u0000 \u0000 \u0000 v\u0000 \u0000 \u0000 ′\u0000 \u0000 \u0000 \u0000 = 23 up to 97% at 725 fs. After a laser pulse, the positive chirp promoted the yield of vibrational states to increase, but the negative chirp inhibited its decrease. For the D1Πu state, when laser intensity is 1.0 × 1014 W/cm2, the purity and yield of target state \u0000 \u0000 \u0000 \u0000 v\u0000 \u0000 \u0000 ′\u0000 \u0000 \u0000 \u0000 = 0 reached the maximum at 1350 fs. That is to say, changing the laser parameters and pulse shapes could control the photochemical reaction along our desired direction. These conditions will provide an important reference and suggest a scheme for a feasible photoassociation of further experimental and theoretical research studies. Current study may promote an important step toward the realization of highly accurate quantum manipulation and material synthesis.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49475303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Accuracy Surface Profile Measurement Based on the Vortex Phase-Shifting Interferometry 基于涡旋相移干涉法的高精度表面轮廓测量

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-09-02 DOI: 10.1155/2021/6937072

Donge Zhao, Chaozheng Jia, Yayun Ma, Xuefeng Yang, Bin Zhang, W. Chu

引用次数: 5

Terahertz Absorption Properties of Two Solid Amino Acids and Their Aqueous Solutions 两种固体氨基酸及其水溶液的太赫兹吸收特性

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-07-30 DOI: 10.1155/2021/9203999

Ping Ye, Guoyang Wang, Yizhou Yang, Qinghao Meng, Jiahui Wang, Bo Su, Cunlin Zhang

{"title":"Terahertz Absorption Properties of Two Solid Amino Acids and Their Aqueous Solutions","authors":"Ping Ye, Guoyang Wang, Yizhou Yang, Qinghao Meng, Jiahui Wang, Bo Su, Cunlin Zhang","doi":"10.1155/2021/9203999","DOIUrl":"https://doi.org/10.1155/2021/9203999","url":null,"abstract":"A new type of embedded cyclic olefin copolymer microfluidic chip was designed and combined with terahertz (THz) technology to study the effects of glycine and arginine on the THz wave absorption characteristics. This study aims to understand the interactions between solid amino acid molecules and between amino acid and water molecules and to determine the changes in their microstructure. By observing the intensity of the time domain spectra in the range of 0.2–2.6 THz, we found that, as the concentration of glycine and arginine increased, the THz transmission gradually decreased. It can be inferred that the molecular structure and quantity of different amino acids have different influence on the hydrogen bond, which affects the absorption coefficient in solution. It was also found that the terahertz technique is able to identify the solid amino acid species better, and it can also perform some species identification for liquid amino acids. These results provide a reference for future studies on the terahertz absorption properties of amino acid samples. Moreover, Gaussian16 software was used to calculate the terahertz spectra using the density functional theory, B3LYP functional, and 6-31G basis set. Additionally, Gaussian View6 video software provided the frequency values, molecular vibration modes of the theoretical absorption peaks of glycine, arginine, and its aqueous solutions in the frequency range of 0.2–2.6 THz, which offers theoretical support for future studies.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45459151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Analysis of the Spatial-Frequency Characteristics of the Photo-Assisted Method of a Quartz Rough Surface Nano-Polishing 石英粗糙表面纳米抛光光辅助法的空间-频率特性分析

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-07-29 DOI: 10.1155/2021/8773864

V. Kanevskii, S. Kolienov, V. Grygoruk, O. Stelmakh, Hao Zhang

{"title":"Analysis of the Spatial-Frequency Characteristics of the Photo-Assisted Method of a Quartz Rough Surface Nano-Polishing","authors":"V. Kanevskii, S. Kolienov, V. Grygoruk, O. Stelmakh, Hao Zhang","doi":"10.1155/2021/8773864","DOIUrl":"https://doi.org/10.1155/2021/8773864","url":null,"abstract":"The relationship between the spatial-frequency parameters of a rough surface with a random profile, which has a Gaussian form of the correlation function, and the amplitude-frequency characteristics of the electric field created by this surface is determined. The numerical determination of the evanescent field optimal configuration formed near the quartz rough surface in the gaseous medium saturated with chlorine molecules when illuminated from the quartz side has been considered. The finite-element approach is used to solve the Helmholtz two-dimensional vector equation. It was found that at the initial stage of photochemical polishing different electrodynamic conditions are created for the etching process depending on the profile height standard deviation value. In particular, when the standard deviation is less than 1 nm, all surface protrusions, for which the spatial spectrum harmonics of the profile are located in the region of the maximum slope of the spectral function, are most actively etched. This leads to a decrease in the effective width of the spatial spectrum of a rough quartz surface and an increase in its correlation length. Therefore, simultaneously with decreasing the height of the protrusions, the surface becomes flatter. The paper shows the different character of quartz surface nano-polishing process conditions depending on the initial standard deviation of the profile height.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42657501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Single-Longitudinal-Mode Selection Technology for Solid-State Lasers 固体激光器单纵模选择技术的发展

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-07-28 DOI: 10.1155/2021/6667015

Xuanpu Zhang, Zhihan Wang, Shi Liu, Siyu Gou, R. Fan, Duo Jin, Z. Bai, Zhen-xu Bai

引用次数: 7

Research on Spectroscopy Modulation of a Distributed Feedback Laser Diode Based on the TDLAS Technique 基于TDLAS技术的分布式反馈激光二极管光谱调制研究

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-07-24 DOI: 10.1155/2021/8829790

Bin Li, L. Xue, Nan Ji, Daikang Wei

{"title":"Research on Spectroscopy Modulation of a Distributed Feedback Laser Diode Based on the TDLAS Technique","authors":"Bin Li, L. Xue, Nan Ji, Daikang Wei","doi":"10.1155/2021/8829790","DOIUrl":"https://doi.org/10.1155/2021/8829790","url":null,"abstract":"Laser current and temperature control circuits have been developed for a distributed feedback laser diode, which is applied as the light source of a tuneable diode laser absorption spectroscopy system. The laser’s temperature fluctuation can be limited within the range of −0.02 to 0.02°C, and good operation stability was observed through 15 hours of monitoring on the emitting wavelength of the laser. Response time of temperature modulation was tested which is suitable for the tuning requirements of gas detection systems. Laser current can be injected within the range from 40 to 80 mA. In addition, a linear power supply circuit has been developed to provide stable and low-noise power supply for the system. The physical principles of laser modulation theory are discussed before experiments. Experiments show that the output wavelength of the laser can be tuned accurately through changing the working current and temperature. The wavelength can be linearly controlled by temperature at 0.115 nm/°C (I = 70 mA) and be controlled by current at 0.0140 nm/mA (T = 25°C). This is essential for the tuneable diode laser absorption spectroscopy systems. The proposed cost-effective circuits can replace commercial instruments to drive the laser to meet the requirements of methane detection experiments. It can also be applied to detect other gases by changing the light source lasers and parameters of the circuits.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47303652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Dielectric Properties of ZnO-Based Nanocomposites and Their Potential Applications zno基纳米复合材料的介电性能及其潜在应用

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-07-22 DOI: 10.1155/2021/9950202

D. Kaur, Amardeep Bharti, Tripti Sharma, C. Madhu

{"title":"Dielectric Properties of ZnO-Based Nanocomposites and Their Potential Applications","authors":"D. Kaur, Amardeep Bharti, Tripti Sharma, C. Madhu","doi":"10.1155/2021/9950202","DOIUrl":"https://doi.org/10.1155/2021/9950202","url":null,"abstract":"Energy storage devices constitute one of the research areas in recent years. Capacitors are commonly used for the storage of electrical energy. The current research is focusing on not only the improvement in energy density but also the materials which are environment friendly. Polymer composites are known to be technically essential materials owing to their wide range of applications. Enormous research has been devoted to zinc oxide- (ZnO-) based polymer nanocomposites, due to their extraordinary dielectric properties. This review article presents a detailed study of the dielectric properties of ZnO-based nanocomposites. The dielectric constant study includes the effect of transition metals and rare earth metals as a dopant in ZnO. This review gives an insight into the mechanism responsible for the variation of dielectric constant in ZnO nanocomposites due to various factors like size of nanoparticles, thickness of the thin film, operating frequency, doping concentration, and atomic number. The observations have been summarized to convey the mechanism and structural changes involved in the ZnO nanocomposites to the researchers. The deployment of biodegradable nanocomposite materials is expected to open an innovative way for their outstanding electronic applications as storage materials.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42850727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

Optic Disc and Optic Cup Segmentation for Glaucoma Detection from Blur Retinal Images Using Improved Mask-RCNN 基于改进掩模RCNN的模糊视网膜图像视盘和视杯分割青光眼检测

IF 1.7 4区物理与天体物理

International Journal of Optics Pub Date : 2021-07-21 DOI: 10.1155/2021/6641980

Tahira Nazir, Aun Irtaza, V. Starovoitov

{"title":"Optic Disc and Optic Cup Segmentation for Glaucoma Detection from Blur Retinal Images Using Improved Mask-RCNN","authors":"Tahira Nazir, Aun Irtaza, V. Starovoitov","doi":"10.1155/2021/6641980","DOIUrl":"https://doi.org/10.1155/2021/6641980","url":null,"abstract":"Glaucoma is a fatal eye disease that harms the optic disc (OD) and optic cup (OC) and results into blindness in progressed phases. Because of slow progress, the disease exhibits a small number of symptoms in the initial stages, therefore causing the disease identification to be a complicated task. So, a fully automatic framework is mandatory, which can support the screening process and increase the chances of disease detection in the early stages. In this paper, we deal with the localization and segmentation of the OD and OC for glaucoma detection from blur retinal images. We have presented a novel method that is Densenet-77-based Mask-RCNN to overcome the challenges of the glaucoma detection. Initially, we have performed the data augmentation step together with adding blurriness in samples to increase the diversity of data. Then, we have generated the annotations from ground-truth (GT) images. After that, the Densenet-77 framework is employed at the feature extraction level of Mask-RCNN to compute the deep key points. Finally, the calculated features are used to localize and segment the OD and OC by the custom Mask-RCNN model. For performance evaluation, we have used the ORIGA dataset that is publicly available. Furthermore, we have performed cross-dataset validation on the HRF database to show the robustness of the presented framework. The presented framework has achieved an average precision, recall, F-measure, and IOU as 0.965, 0.963, 0.97, and 0.972, respectively. The proposed method achieved remarkable performance in terms of both efficiency and effectiveness as compared to the latest techniques under the presence of blurring, noise, and light variations.","PeriodicalId":55995,"journal":{"name":"International Journal of Optics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42702655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14