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Wide angle mini-LEDs combined with multifocal micro reflector cavity for thin portable device flashlight Int. J. Optomechatron. (IF 5.5) Pub Date : 2024-03-15 Zhi Ting Ye, Chia Chun Hu, Chang Che Chiua
LEDs employed in portable device flashes are Lambertian light sources, additional optical components such as Fresnel lenses and reflector cups must be incorporated to adjust the light distribution....
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A miniature illumination probe in lightsheet fluorescence microscopy for real-time imaging injured adult zebrafish’s ventricular recuperation Int. J. Optomechatron. (IF 5.5) Pub Date : 2024-01-01 Ho-Ching Hsiao, Po-Sheng Hu
Imaging adult zebrafish’s cardiac organ is often hampered by the limited volume of the internal cavity. This research study aims to design, manufacture and apply a miniature illumination probe amen...
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Handheld motorized injection system with fiber-optic distance sensors and adaptive time-delay controller Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-12-29 Jintaek Im, Sukho Park, Cheol Song
During the last decade, many ophthalmic therapeutic drugs have been clinically approved, and intraocular injection has been a common surgical intervention. Injecting drugs directly into the subreti...
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Antibacterial properties of lithium niobate crystal substrates Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-09-01 Rusul M. Al-Shammari, Ahmed Kassem, Nebras Al-attar, Michele Manzo, Katia Gallo, Paul Whyte, James H. Rice, Brian J. Rodriguez
Abstract The bactericidal properties of chemically patterned lithium niobate substrates under a super-bandgap UV light source is established. UV irradiation of lithium niobate surfaces inoculated with bacteria leads to antimicrobial activity compared to a glass substrate under similar conditions, as determined by surface enhanced Raman spectroscopy and corroborated with a fluorescence-based live/dead
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Design of optical fiber Bragg grating-based sensors for flow measurement in pipes Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-09-01 Pedro Dieguez, Armando Rodriguez, Jose Carlos Urroz, Javier Lopez, Manuel Lopez-Amo
Abstract In this work, optical Fiber Bragg grating (FBG) sensors were used to measure water flow in pipes. Several types of coatings were incorporated into the design of the sensors to examine their effects on the elastic strain that the fiber underwent as a result of the water flow. ANSYS-CFX V2020 R2 software was used to model the elastic strain encountered by the fiber under various flow rates in
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Lissajous confocal fluorescent endomicroscopy with a lever mechanism and a frequency separation by an asymmetric polymer tube Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-07-26 Jintaek Im, Yeonhee Chang, Myung Ho Lee, Dukho Do, Kyuhang Lee, Daegab Gweon, Cheol Song
Abstract We present a confocal fluorescent endomicroscopic system with a Lissajous scan using an asymmetric polymer tube and piezoelectric (PZT) tube actuator. The fiber cantilever’s scanning part is often inside the PZT tube actuator to reduce the scanner’s rigid length and enhance the beam deflection via a lever mechanism. Here, the mathematical model of the PZT tube actuator-based lever mechanism
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A method to improve the computational performance of nonlinear all—optical diffractive deep neural network model Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-06-28 Yichen Sun, Mingli Dong, Mingxin Yu, Lidan Lu, Shengjun Liang, Jiabin Xia, Lianqing Zhu
Abstract To further improve the computational performance of the diffractive deep neural network (D2NN) model, we use the ReLU function to limit the phase parameters, which effectively solves the problem of vanishing gradient that occurs in the mitigation model. We add various commonly used nonlinear activation functions to the hidden layer of the model and establish the ReLU phase-limit nonlinear
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Stacking ensemble transfer learning based thermal displacement prediction system Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-06-22 Ping-Huan Kuo, Chia-Ho Lee, Her-Terng Yau
Abstract In the precision machining industry, machine tools are usually affected by various factors during machining, and various machining errors generated accordingly. Where thermal error is one of the most common and difficult to control factors for machine tools. Therefore, in this study, six temperature sensors and an eddy current displacement meter are provided in a machine tool with 4-axis for
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Deep-reinforcement-learning-based gait pattern controller on an uneven terrain for humanoid robots Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-06-15 Ping-Huan Kuo, Chieh-Hsiu Pao, En-Yi Chang, Her-Terng Yau
Abstract Although conventional gait pattern control in humanoid robots is typically performed on flat terrains, the roads that people walk on every day have bumps and potholes. Therefore, to make humanoid robots more similar to humans, the movement parameters of these robots should be modified to allow them to adapt to uneven terrains. In this study, to solve this problem, reinforcement learning (RL)
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Design and implementation of an electromechanical gear system for optimization of automatic phase-shifting of a Dual Aperture Common-Path Interferometer Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-05-25 Patricia Prieto-Cortés, Antonio Barcelata-Pinzón, Ricardo Iván Álvarez-Tamayo, Alejandro Javier Bravo-Parra
Abstract In this work, we report experimental results of a proposed gear system for optimization of phase shifts used for extraction of phase between a reference and a test object in a Double Aperture Common Path Interferometer. The electromechanical approach is designed to increase the precision and control of automated transverse translation of a diffraction grating to obtain equidistant displacements
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Acousto-optic coupling in 1-D phoxonic potential well nanobeam cavity using slow modes Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-05-10 Ying-Ping Tsai, Jyun-Jie Jhan, Bor‐Shyh Lin, Fu‐Li Hsiao
Abstract We propose a novel acousto-optic (AO) devise using suspended fishbone nanobeams based on phononic and photonic potential well (PnPW and PtPW). We aim to reduce the traditional device size and eliminate the need for mirror regions in 1-D nanobeam cavity. By manipulating the frequencies of slow sound (SS) and slow light (SL) modes through geometric parameters, we can create potential wells for
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Fate of ejected debris from the explosion of the rear surface of fused silica in the high-power laser facility Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-05-08 Ge Peng, Qiang Gao, Lingxi Liang, Zhe Dong, Jiaxuan Chen, Chengyu Zhu, Peng Zhang, Lihua Lu
Abstract This study focuses on the issue of uncontrollable debris generated by laser-matter interactions in high-power laser facilities, which significantly impairs operational efficiency. The maximum motion distance of debris, referred to as the safety distance, is a crucial parameter that this work investigates. Three prediction methods that utilize aerodynamic coefficients and trajectories are proposed
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Template-update-based visual tracking for automatic cell manipulation in FluidFM Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-04-13 ZhuoBo Yang, Xianmin Zhang, Hai Li, Benliang Zhu, Ke Feng, Rixin Wang, Shuiquan Pang, Sergej Fatikow
Abstract Visual tracking is an essential process for performing automated cell manipulation tasks. However, Real-time accurate cell tracking in FluidFM is challenging due to probe occlusion during manipulation. This study presents a correlation filtering-based tracking method for real-time, high-precision position tracking of cells and probes. In this method, a target template update strategy is proposed
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All fiber Mach–Zehnder interferometer for simultaneous measurement of temperature and refractive index Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-04-04 Jing Zhang, Yongqian Li, Guozhen Yao
Abstract An all fiber Mach–Zehnder interferometric (MZI) sensor for measuring temperature and refractive index (RI) is proposed and experimentally demonstrated. The proposed sensor is fabricated with a coreless–few mode–coreless fiber structure. Variations in ambient temperature and RI cause changes in phase differences between the fundamental mode and the higher-order modes, leading to shifts in interference
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Optoacoustic quantitative in vitro detection of diabetes mellitus involving the comprehensive impacts based on improved quantum particle swarm optimized wavelet neural network Int. J. Optomechatron. (IF 5.5) Pub Date : 2023-04-04 Zhong Ren, Tao Liu, Chengxin Xiong, Wenping Peng, Junli Wu, Gaoqiang Liang, Bingheng Sun
Abstract The high accurate detection of blood glucose level (BGL) is very important for non-invasive monitoring of diabetes mellitus. In this work, the optoacoustic (OA) quantitative in vitro detection of diabetes mellitus involving the comprehensive impacts of multiple factors (irradiation energy, concentration, temperature, flow rate and vessel depth) was firstly studied. To achieve this aim, a set
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MEMS enabled suspended silicon waveguide platform for long-wave infrared modulation applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2022-12-05 Xinmiao Liu, Qifeng Qiao, Bowei Dong, Weixin Liu, Cheng Xu, Siyu Xu, Guangya Zhou
Abstract Long-wave infrared (LWIR, 6–14 µm) is an important wavelength range as it covers abundant vibrational molecular fingerprints that can be used for gas/liquid sensing and absorption spectroscopy. Silicon waveguide-based passive photonic devices that offer advantages toward chip-scale miniaturization of photonic integrated circuits (PIC) and photonic sensors in LWIR have been explored. However
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Online optical inspection of electrolytic copper plate based on digital moiré Int. J. Optomechatron. (IF 5.5) Pub Date : 2022-10-21 Zijun Yuan, Guanghui Zhou, Zhuangzhi Zhu, Guo Li, Xiangdong Chen
Abstract The application of automatic inspection plays an important role in improving the quality of industrial products. Aiming at nodules on the surface of electrolytic copper plate, this article introduces a comprehensive optical online inspection method. In order to obtain dynamic information of product and overcome the interference of random factors such as large-curvature deformation, position
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Design of an interference system for measuring the transverse beam size in HLS-II Int. J. Optomechatron. (IF 5.5) Pub Date : 2022-05-04 Sanshuang Jin, Yunkun Zhao, Baogen Sun, Leilei Tang, Fangfang Wu, Tianyu Zhou, Ping Lu, Jigang Wang
Abstract In this paper, a horizontal and vertical double-slits interferometer using visible light are designed to measure the transverse beam size of Hefei Light Source II (HLS-II). For the given initial structural parameters of the two interferometers, a series of numerical simulations and analyses are carried out by using the Synchrotron Radiation Workshop (SRW) code. Furthermore, the core parameters
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Pyro-phototronic effect enhanced self-powered photodetector Int. J. Optomechatron. (IF 5.5) Pub Date : 2022-04-05 Qi Li, Zhou Li, Jianping Meng
Abstract Pyro-phototronic effect has attracted much attention in fabricating self-powered high-performance photodetectors because of the significant enhancement by modulating the separation, transportation, and extraction of photo-generated electron-hole pairs in optoelectronic processes. This review highlights the advances in fabricating pyro-phototronic effect enhanced photodetectors. The fundamental
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Mechanism of peripheral nerve modulation and recent applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-11-25 Heejae Shin, Minseok Kang, Sanghoon Lee
Abstract Neuromodulation is a multi-interdisciplinary field of neuroscience, neural engineering, and medicine in a complex, but a way of understanding. Recently, the interest and researches in this field have been attracted due to its promising applications such as bionic limbs and bioelectronic medicine. For easier entry into this field, in this review, we approach the basic mechanism, methods, and
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A rapid precision fabrication method for artificial compound eyes Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-11-21 Yueqi Zhai, Jiaqi Niu, Jingquan Liu, Bin Yang
Abstract A bionic artificial compound eye manufactured on a concave mold with precision engraving method for imaging, which allows for the rapid fabrication of large-scale compound eyes at a low cost. Thousands of concave structures are accurately machined and positioned omnidirectionally in concentric rings with a minimum diameter of 100 μm on a hemisphere. The PDMS ommatidia can be obtained once
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Depth-sensing technology using a negative microlens array Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-11-22 Chih-Hsiung Lin, Kun-Huang Chen
Abstract In this study, an optical depth-sensing system whose focus distance was equal to its object distance was constructed by using a lens with a shortened depth of field. In addition to a mechanical control lens that captured two-dimensional images, a set of negative microlens array films used to shorten the depth of field was installed in this system. The developed system can scan a region and
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Progress of optomechanical micro/nano sensors: a review Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-10-31 Xinmiao Liu, Weixin Liu, Zhihao Ren, Yiming Ma, Bowei Dong, Guangya Zhou, Chengkuo Lee
Abstract Optomechanical sensing based on the coupling between mechanical motions and optical resonances has attracted huge interest in sensor applications due to its small footprint, high sensitivity, low detection limit, and electromagnetic immunity. Optomechanical sensors that detect from mechanical motion at µm scale to molecular vibration at nm scale have found various applications such as force
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Infrared metamaterial for surface-enhanced infrared absorption spectroscopy: pushing the frontier of ultrasensitive on-chip sensing Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-08-11
Abstract Surface-enhanced infrared absorption (SEIRA) spectroscopy is a powerful technique that overcomes the issue of low molecular absorption cross-sections in infrared spectroscopy. Due to the collective oscillations of electrons in the infrared regime, SEIRA using resonant metamaterial provides greatly enhanced (up to 107) electromagnetic fields extending up to tens of nanometers from the metamaterial
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Application of OCT for osteonecrosis using an endoscopic probe based on an electrothermal MEMS scanning mirror Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-06-14 D. Wang, J. Zhang, L. Liu, Z. Yan, P. Wang, Y. Ding, H. Xie
Abstract Osteonecrosis becomes a more widespread problem as the population is getting older. Current osteonecrosis diagnosis not only requires invasive procedures but also often leads to surgical replacement. This paper reports a preliminary study of applying optical coherence tomography (OCT) for noninvasive diagnosis of osteonecrosis using an endoscopic probe based on a microelectromechanical (MEMS)
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MEMS gratings and their applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-05-17 Guangcan Zhou, Zi Heng Lim, Yi Qi, Fook Siong Chau, Guangya Zhou
Abstract Grating plays an essential role in various optical systems owing to its unique dispersion properties. In recent years, there is increasing demand to miniaturize optical systems for a wide range of field applications. Therefore, the integration of diffraction grating with MEMS technology provides an efficient way to build truly miniaturized optical systems. Till now, MEMS diffraction gratings
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Feedback motion control of a spatial double pendulum manipulator relying on swept laser based pose estimation Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-05-13 Roland R. Zana, Ambrus Zelei
Abstract Spatial pose estimation devices for mobile and cable-suspended robots have been rapidly developed. The HTC Vive sensor, which operates with swept laser beams, has aroused many researchers’ interest. We present experiments with a double pendulum robot equipped with the HTC Vive Tracker. A linear feedback controller ensured the tracking of pre-defined end-effector trajectories of various speeds
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Effect of different tinted soft contact lenses on the tear quality and ocular surface properties Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-05-02 Min-Yen Hsu, Yu-Ping Wang, Pei-Yu Hong, Pei-Ying Chen, Connie Chen
Abstract Different designs for contact lenses can result in insufficient oxygen permeability of the lenses. Moreover, the contact lens wearing schedule, replacement, lens care systems, and purchase methods are all important considerations for contact lens wearers. To evaluate the influence of tinted contact lenses with the pigment layer in different locations on the tear quality and ocular surface
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Analysis and correction of geometrical error-induced pointing errors of a space laser communication APT system Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-05-02 Furui Zhang, Ping Ruan, Junfeng Han, Yao Li
Abstract The geometrical error caused pointing error is an inevitable problem in space satellite laser communication terminals which can affect the pointing accuracy of the APT (acquisition pointing and tracking) system greatly, in order to facilitate the assembling of the APT system and improve the performance of the laser communication system, the geometrical error sensitivity about the APT pointing
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Correlation of accommodation and lens location with higher-order aberrations and axial length elongation during orthokeratology lens wear Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-04-07 Jy-Been Liang, Wen-Pin Lin, Richard Wu, Connie Chen
Abstract This study examined the effects of overnight orthokeratology (OK) on higher-order wavefront aberrations (HOA), axial length elongation, and accommodation. Low to moderate myopic subjects with healthy eyes wore OK lenses nightly for 9 months. Corneal topography wavefront aberrations and accommodation were measured approximately monthly. Linear mixed-effects models were used to examine the association
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Assessment of ocular surface response to tinted soft contact lenses with different characteristics and pigment location Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-01-19 Min-Yen Hsu, Pei-Yu Hong, Jyh-Cheng Liou, Yu-Ping Wang, Connie Chen
Abstract This study investigated the characteristics and location of the pigment layer of commercially available tinted contact lenses and evaluated ocular surface properties. The rub-off test and anterior segment Fourier-domain optical coherence tomography were used to analyze the pigment layer of the lenses. They also completed a rating questionnaire of subjective symptom perception after wearing
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Progress in wafer bonding technology towards MEMS, high-power electronics, optoelectronics, and optofluidics Int. J. Optomechatron. (IF 5.5) Pub Date : 2021-01-02 Jikai Xu, Yu Du, Yanhong Tian, Chenxi Wang
Abstract Wafer bonding is an attractive technology that can join homo/heterogeneous materials into one composite. It has a wide range of applications in the micro-electro-mechanical system (MEMS), integrated circuit, consumer and power electronics, micro/nanofluidics, etc. Since all devices on the same wafer are sealed and tested at wafer size, it brings lots of benefits compared with the component-level
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Precision control of miniature SCARA robots for multi-object spectrographs Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-12-10 Luzius Kronig, Philipp Hörler, Stefane Caseiro, Loic Grossen, Ricardo Araujo, Jean-Paul Kneib, Mohamed Bouri
Abstract Advances in astronomy led to the demand for measuring the spectra of multiple night sky objects simultaneously. Some of these Multi-Object Spectrographs use robotic systems that position optical fibers in the focal plane of the observing telescope. These systems rely on precise fiber placement in order to collect the light spectra of faint stars and galaxies. Here, we present how to design
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Reconfigurable metamaterials for optoelectronic applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-12-08 Yu-Sheng Lin, Zefeng Xu
Abstract In recent years, electromagnetic characteristics of metamaterials has aroused great interest because of innovative fundamental understanding as well as promising potential applications in optics, semiconductors, imaging, and sensing. We survey the state-of-the-art of spatially reconfigurable metamaterials in which electromagnetic Lorentz, Coulomb, and Ampere forces, as well as optical signals
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Fuzzy logic based feedback control system for the frequency stabilization of external-cavity semiconductor lasers Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-12-01 Yang Wang, Xiaoyan Wu, Yuhang Wang, Xiaoping Zhou
Abstract This paper proposes an intelligent approach (fuzzy logic) for the design of external-cavity semiconductor lasers (ECLs) for better disturbance rejection. As a kind of nonlinear optical system, ECL output frequency is difficult to be stabilized by conventional methods. The fuzzy logic algorithm is preferred for ECLs stabilization, which could update parameters automatically. Suddenability to
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The study on surface integrity on laser-assisted turning of SiCp/2024Al Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-08-06 Changtai Zhai, Jinkai Xu, Yiquan Li, Yonggang Hou, Shuaishuai Yuan, Qimeng Liu, Xu Wang
Abstract The study investigates the effects of variables of laser-assisted turning (LAT) and conventional turning (CT) on machining performance of 45% volume fraction silicon carbide particle reinforced 2024 aluminum matrix composites (45 vol.% SiCp/2024Al). The process benefits of laser processing variables were analyzed by comparing the surface roughness, surface microstructure and residual stress
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All-fiber Mach–Zehnder comb filter based on tapered fibers for wavelength switchable erbium-doped fiber lasers Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-08-04 He Wei, Zhu Lianqing, Dong Mingli
Abstract A wavelength switchable erbium-doped fiber laser was constructed based on an all-fiber Mach–Zehnder interferometer (MZI) comb filter. The MZI consisted of a fiber with two tapers. An L-band erbium-doped fiber was used as the gain medium, and 1557.92, 1563.2, and 1568.06 nm single-wavelength and dual-wavelength switchable lasers at 1558, 1563.7, and 1570.2 nm were realized by adjusting the
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Simultaneous multi-dimensional spatial frequency modulation imaging Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-01-06 Nathan Worts, John Czerski, Jason Jones, Jeffrey J. Field, Randy Bartels, Jeff Squier
Abstract One of the primary challenges in advanced manufacturing (AM) is the lack of efficient optical metrics for ensuring quality control over the manufacturing process. Many current imaging techniques have excessive data requirements and require computationally intensive post-processing to effectively characterize various AM environments. Spatial frequency modulated imaging (SPIFI) addresses many
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Reconfigurable metamaterials for optoelectronic applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2020-01-01 Yu-Sheng Lin,Zefeng Xu
Abstract In recent years, electromagnetic characteristics of metamaterials has aroused great interest because of innovative fundamental understanding as well as promising potential applications in optics, semiconductors, imaging, and sensing. We survey the state-of-the-art of spatially reconfigurable metamaterials in which electromagnetic Lorentz, Coulomb, and Ampere forces, as well as optical signals
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Silk fibroin and ultra-long silver nanowire based transparent, flexible and conductive composite film and its Temperature-Dependent resistance Int. J. Optomechatron. (IF 5.5) Pub Date : 2019-08-02 Xiangzheng Qin, Yu Peng, Piaopiao Li, Kai Cheng, Zhenzhong Wei, Ping Liu, Ning Cao, Junyi Huang, Jinjun Rao, Jinbo Chen, Tao Wang, Xiaomao Li, Mei Liu
A transparent, conductive, smooth, and temperature sensitive thin films was fabricated and characterized in this paper. Silk fibroin could be processed into transparent thin films, which can act as ideal opto-electronic substrates. As pure silk fibroin film is nonconductive, ultra-long silver nanowires coating and platinum sputtering were used to strengthen its conductivity. Ultra-long nanowires were
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Binocular microlens imaging system based on micro fabrication technology and its application in vein-enhanced display Int. J. Optomechatron. (IF 5.5) Pub Date : 2019-07-03 Si Di, Jian Jin
Vein display device can significantly increase the success rate of intravenous injection. However, traditional vein display devices only contain near-infrared image information, which inevitably loses skin color information. In this article, a binocular microlens was fabricated by micro-fabrication technology. Then, a smart binocular microlens imaging system is set up. By this system, the near-infrared
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Modeling and evaluation of magnetic fluid deformable mirror with dual-layer actuators Int. J. Optomechatron. (IF 5.5) Pub Date : 2019-04-23 Zhu Zhang, Xiang Wei, Zhizheng Wu, Gunner Scott, Yuanyuan Wang, Mei Liu, Merveilles Dziki
In this paper, a rectangular magnetic fluid deformable mirror (MFDM) with dual-layer actuators is proposed, which is designed to improve the correction performance for full-order aberrations. Compared with the conventional adaptive optics system that uses two mirrors to configure as a woofer–tweeter system, the proposed MFDM combines the two mirrors into one by using a two-layer layout design of the
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Laser-dilatometer calibration using a single-crystal silicon sample Int. J. Optomechatron. (IF 5.5) Pub Date : 2019-04-16 Ines Hamann, Josep Sanjuan, Ruven Spannagel, Martin Gohlke, Gudrun Wanner, Sönke Schuster, Felipe Guzman, Claus Braxmaier
Marginal changes in geometrical dimensions due to temperature changes affect the performance of optical instruments. Highly dimensionally stable materials can minimize these effects since they offer low coefficients of thermal expansion (CTE). Our dilatometer, based on heterodyne interferometry, is able to determine the CTE in 10−8 K−1 range. Here, we present the improved interferometer performance
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Flatness measurement of large flat with two-station laser trackers Int. J. Optomechatron. (IF 5.5) Pub Date : 2018-12-31 Jie Li, Jie Yang, Shibin Wu, Xuedong Cao
We present a novel method to accurately measure the flatness of a large flat. The method can be seen as a task-specific error correction of the laser tracker. Laser trackers are positioned at two specific measuring stations and measure the coordinates of the same sample points. The angular errors of the primary laser tracker are compensated with constraint information provided by an additional laser
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Fabrication of 3D nano-hemispherical cavity array plasmonic substrate for SERS applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2018-11-22 Chu-Yu Huang, Ming-Shiuan Tsai
Surface-enhanced Raman scattering (SERS) have numerous applications in areas such as analytical chemistry, biochemistry, and environmental science. However to manufacture SERS active substrates with good reproducibility and low cost is not easy, which hinder the SERS technology from being widespread in various applications. In this study, we developed a batch producible hot embossing 3D nanostructured
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Wavelength switchable and stable single-longitudinal-mode erbium-doped fiber laser based on Mach–Zehnder interferometer and tunable filter Int. J. Optomechatron. (IF 5.5) Pub Date : 2018-08-06 Wei He, Lianqing Zhu, Mingli Dong, Fei Luo
An erbium-doped fiber laser with all-fiber Mach–Zehnder interferometer (MZI) and tunable filter was proposed and experimentally demonstrated. In the designed fiber laser, 6 m C-band erbium-doped fiber was selected as a gain medium; the MZI comprised two waist-enlarged fiber bitapers. In the experiment, the laser threshold was 93 mW, whereas a switchable single-longitudinal-mode laser was realized within
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Dynamic response of ferrofluidic deformable mirrors using elastomer membrane and overdrive techniques Int. J. Optomechatron. (IF 5.5) Pub Date : 2018-06-14 Maxime Rochette, Ermanno F. Borra, Jean-Philippe Déry, Anna M. Ritcey
The experimental results obtained with a ferrofluidic deformable mirror controlled by electro-magnet actuators are presented here. Using a step input through a single actuator, we obtained a steady-state settling time of 100 ms; however, different combinations of overdrive inputs can be used to decrease it to 25 ms. A new technique which consists of laying down an elastomer membrane, coated with an
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Rigorous simulation of nonlinear optomechanical coupling in micro- and nano-structured resonant cavities Int. J. Optomechatron. (IF 5.5) Pub Date : 2018-06-04 Matteo Stocchi, Davide Mencarelli, Yan Pennec, Bahram Djafari-Rouhani, Luca Pierantoni
A numerical method aimed to predict the optomechanical dynamics in micro- and nano-structured resonant cavities is introduced here. The rigorousness of it is ensured by exploiting the harmonic version of the transformation optics (TO) technique and by considering all the energy-transduction contributions of electrostriction, radiation pressure, photoelasticity and moving boundaries. Since our full-wave
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High-resolution optical inspection system for fast detection and classification of surface defects Int. J. Optomechatron. (IF 5.5) Pub Date : 2018-05-09 Ruifang Ye, Ming Chang, Chia-Sheng Pan, Cheng An Chiang, Jacque Lynn Gabayno
A high-resolution automated optical inspection (AOI) system based on parallel computing is developed to achieve fast inspection and classification of surface defects. To perform fast inspection, the AOI apparatus is connected to a central computer which executes image processing instructions in a graphical processing unit. Defect classification is simultaneously implemented with Hu’s moment invariants
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In situ monitoring of photostriction in chalcogenide glass film using fiber Bragg grating sensors Int. J. Optomechatron. (IF 5.5) Pub Date : 2017-12-19 Sivakumar Gayathri, G. Sreevidya Varma, Gagandeep Singh, Bannur Nanjunda Shivananju, S. Sridevi, Siva Umapathy, Sai Siva Gorthi, Sundarrajan Asokan
The reversible photostriction (photomechanical strain) in Ge35S65 chalcogenide thin film deposited by a solvent casting method has been monitored using a fiber Bragg grating (FBG) sensor. The shift in Bragg wavelength is used as a probing parameter to quantitatively measure the photoinduced strain arising because of structural modifications in these films under illumination. Exposure to band gap light
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Hyperspectral photoacoustic spectroscopy of highly-absorbing samples for diagnostic ocular imaging applications Int. J. Optomechatron. (IF 5.5) Pub Date : 2017-12-19 Hoong-Ta Lim, Vadakke Matham Murukeshan
Photoacoustic spectroscopy has been used to measure optical absorption coefficient and the application of tens of wavelength bands in photoacoustic spectroscopy was reported. Using optical methods, absorption-related information is, generally, derived from reflectance or transmittance values. Hence measurement accuracy is limited for highly absorbing samples where the reflectance or transmittance is
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Fabrication of high quality factor lithium niobate double-disk using a femtosecond laser Int. J. Optomechatron. (IF 5.5) Pub Date : 2017-12-19 Zhiwei Fang, Ni Yao, Min Wang, Jintian Lin, Jianhao Zhang, Rongbo Wu, Lingling Qiao, Wei Fang, Tao Lu, Ya Cheng
We demonstrate fabrication of a high-quality factor lithium niobate double-disk whispering-gallery microcavity using femtosecond laser assisted ion beam milling. Using this method, two vertically stacked 30-µm diameter disks with a 200-nm gap are fabricated. With our device, an optical quality factor as high as 1.35 × 105 is demonstrated. Our approach is scalable to fabricate multiple disks on a single
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Micromirror-based real image laser automotive head-up display Int. J. Optomechatron. (IF 5.5) Pub Date : 2017-10-11 Chao Fan, Siyuan He
This paper reports a micromirror-based real image laser automotive head-up display (HUD), which overcomes the limitations of the previous designs by: (1) implementing an advanced display approach which is able to display sharp corners while the previous designs can only display curved lines such as to improve the display fidelity and (2) Optimizing the optical configuration to significantly reduce
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Multiview registration-based handheld 3D profiling system using visual navigation and structured light Int. J. Optomechatron. (IF 5.5) Pub Date : 2017-04-13 Shirazi Muhammad Ayaz, Min Young Kim
This article describes the 3D handheld profiling system composed of a stereo camera and an illumination projector to collect high-resolution data for close range of applications. Visual navigation approach is either based on feature matching or on accurate target, and the target-based approach was found to be more accurate if the 3D object has less texture on its surface. Block matching algorithm was
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Editorial Board EOV Int. J. Optomechatron. (IF 5.5) Pub Date : 2016-11-08
(2016). Editorial Board EOV. International Journal of Optomechatronics: Vol. 10, No. 3-4, pp. ebi-ebi.
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Generating selected color using RGB, auxiliary lights, and simplex search Int. J. Optomechatron. (IF 5.5) Pub Date : 2016-09-30 HyungTae Kim, Seung Taek Kim, Jongseok Kim, KyungChan Jin, Hong-Seok Kim
A mixed light source generates various colors with the potential to adjust the intensities of multiple LEDs, which makes it possible to generate arbitrary colors. Currently, PCs and OSs provide color selection windows that can obtain the red, green, and blue (RGB) or hue, saturation, and lightness (HSL) color coordinates of a user’s selection. Mixed light sources are usually composed of primary-colored
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Tool removal function modeling and processing parameters optimization for bonnet polishing Int. J. Optomechatron. (IF 5.5) Pub Date : 2016-09-30 Yunpeng Feng, Hengyu Wu, Haobo Cheng
Since computer controlled optical surfacing (CCOS) processes were proposed in the 1960s, many processes were developed for precision optics successfully. In this present work, a novel approach, the precessions process, is proposed and used for large segments fabrication. The removal function of the bonnet polisher based on velocity and pressure distribution, which are obtained from the geometry of
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A 1.8-µm multiwavelength thulium-doped fiber laser based on a hybrid interference filter Int. J. Optomechatron. (IF 5.5) Pub Date : 2016-09-09 He Wei, Zhu Lianqing, Dong Mingli, Luo Fei
A 1.8-µm tunable multiwavelength thulium-doped fiber laser based on a hybrid filter is proposed. In the designed ring-cavity fiber laser, the filter consists of one Sagnac loop and one dual-pass Mach–Zehnder filter. In the experiment, the lasing threshold is 155 mW, and a continuously tunable and stable single-wavelength laser could be realized with a minimum tuning interval of 2.1 nm within a scope
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Resist-free processing of graphene merging optical imaging and classification with scanning probe lithography Int. J. Optomechatron. (IF 5.5) Pub Date : 2016-09-08 Sören Zimmermann, Alexander van Duellen, Markus Wieghaus, Sergio Alfredo Garnica Barragán, Sergej Fatikow
Resist based lithographical techniques are widely applied for graphene processing. These resists can leave residues leading to parasitic effects that deteriorate the desired properties of graphene. This paper presents an experimental setup tailored for resist-free robotic processing of graphene with in-situ vision based control. A robust graphene detection and classification approach is presented applying
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Theoretical investigation on nanoparticle concentrations in optoelectrofluidic chip based on diffusion, convection, and migration Int. J. Optomechatron. (IF 5.5) Pub Date : 2016-09-08 Sheng Hu, Jiangtao Lv, Guangyuan Si
A numerical model and simulation relative to an optoelectrofluidic chip has been presented in this article. Both dielectrophoretic and electroosmotic force attracting the nano-sized particles could be studied by the diffusion, convection, and migration equations. For the nano-sized particles, the protein with radius 3.6 nm is considered as the objective particle. The electroosmosis dependent upon applied