Journal of the Optical Society of Korea最新文献

Simulation for Small Lamellar Grating FTIR Spectrometer for Passive Remote Sensing 被动遥感小片层光栅FTIR光谱仪仿真研究

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.669

Y. Chung, Choong-Man Jo, Seong Kyu Kim, I. Kim, Dohyun Park, Hyo-Yook Bae, Y. Kang

{"title":"Simulation for Small Lamellar Grating FTIR Spectrometer for Passive Remote Sensing","authors":"Y. Chung, Choong-Man Jo, Seong Kyu Kim, I. Kim, Dohyun Park, Hyo-Yook Bae, Y. Kang","doi":"10.3807/JOSK.2016.20.6.669","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.6.669","url":null,"abstract":"A miniaturized FTIR spectrometer based on lamellar grating interferometry is being developed for passive remote-sensing. Consisting of a pair of micro-mirror arrays, the lamellar grating can be fabricated using MEMS technology. This paper describes a method to compute the optical field in the interferometer to optimize the design parameters of the lamellar grating FTIR spectrometer. The lower limit of the micro-mirror width in the grating is related to the formation of a Talbot image in the near field and is estimated to be about 100 μm for the spectrometer to be used for the wavelength range of 7-14 μm. In calculating the far field at the detection window, the conventional Fraunhofer equation is inadequate for detection distance of our application, misleading the upper limit of the micro-mirror width to avoid interference from higher order diffractions. Instead, the far field is described by the unperturbed plane-wave combined with the boundary diffraction wave. As a result, the interference from the higher order diffractions turns out to be negligible as the micro-mirror width increases. Therefore, the upper limit of the micro-mirror width does not need to be set. Under this scheme, the interferometer patterns and their FT spectra are successfully generated.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"20 1","pages":"669-677"},"PeriodicalIF":0.0,"publicationDate":"2016-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70141020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Novel Optical High-Availability Seamless Redundancy (OHSR) Design Based on Beam Splitting / Combining Techniques 一种基于分束/组合技术的新型光高可用无缝冗余设计

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.678

I. R. Altaha, Sungchul Kim, J. Rhee

引用次数: 1

Evolution Properties of a Partially Coherent Flat-topped Vortex Hollow Beam Propagating in Uniaxial Crystals Orthogonal to the Optical Axis 部分相干平顶涡空心光束在与光轴正交的单轴晶体中传播的演化特性

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.686

Dajun Liu, Guiqiu Wang, Xixian Luo, Hongming Yin, Yaochuan Wang

引用次数: 6

Transmittance Improvement with Reversed Fishbone-Shape Electrode in Vertical Alignment Liquid Crystal Display 垂直对准液晶显示器中反向鱼骨电极提高透光率

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.794

Y. Lim, Hyo Joong Kim, Min Su Kim, G. Kim, Yong Hae Kim, Gi-dong Lee, Seunghee Lee

引用次数: 1

All-optical Flip-flop based on Optical Beating and Bistability in an Injection-locked Fabry-Perot Laser Diode 注入锁定法布里-珀罗激光二极管中基于光跳动和双稳性的全光触发器

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.698

Junsu Kim, Hyuek-Jae Lee, Chang-Soo Park

引用次数: 1

Characteristics of ITO/Ag/ITO Hybrid Layers Prepared by Magnetron Sputtering for Transparent Film Heaters 磁控溅射制备透明薄膜加热器用ITO/Ag/ITO杂化层的特性

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.807

Jae-Yeon Kim, Seohan Kim, Seong-Hwan Yoon, P. Song

{"title":"Characteristics of ITO/Ag/ITO Hybrid Layers Prepared by Magnetron Sputtering for Transparent Film Heaters","authors":"Jae-Yeon Kim, Seohan Kim, Seong-Hwan Yoon, P. Song","doi":"10.3807/JOSK.2016.20.6.807","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.6.807","url":null,"abstract":"Transparent film heaters (TFHs) based on Joule heating are currently an active research area. However, TFHs based on an indium tin oxide (ITO) monolayer have a number of problems. For example, heating is concentrated in only part of the device. Also, heating efficiency is low because it has high sheet resistance (Rs). To address these problems, this study introduced hybrid layers of ITO/Ag/ITO deposited by magnetron sputtering, and the electrical, optical, and thermal properties were estimated for various thicknesses of the metal interlayer. The Rs of ITO(40)/Ag/ITO(40 nm) hybrid TFHs were 5.33, 3.29 and 2.15 Ω/□ for Ag thicknesses of 10, 15, and 20 nm, respectively, while the Rs of an ITO monolayer (95 nm) was 59.58 Ω/□. The maximum temperatures of these hybrid TFHs were 92, 131, and 145°C, respectively, under a voltage of 3 V. And that of the ITO monolayer was only 32°C. For the same total thickness of 95 nm, the heat generation rate (HGR) of the hybrid produced a temperature approximately 100°C higher than the ITO monolayer. It was confirmed that the film with the lowest Rs of the samples had the highest HGR for the same applied voltage. Overall, hybrid layers of ITO/Ag/ITO showed excellent performance for HGR, uniformity of heat distribution, and thermal response time.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"20 1","pages":"807-812"},"PeriodicalIF":0.0,"publicationDate":"2016-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70141148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Analysis on Transition between Index- and Bandgap-guided Modes in Photonic Crystal Fiber 光子晶体光纤中折射率和带隙引导模式转换的分析

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.733

K. Hong, S. Lim, H. Park, Seung Kwan Kim

引用次数: 2

Adaptive Detection of a Moving Target Undergoing Illumination Changes against a Dynamic Background 动态背景下光照变化运动目标的自适应检测

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.745

M. Lu, Yang Gao, Ming Zhu

{"title":"Adaptive Detection of a Moving Target Undergoing Illumination Changes against a Dynamic Background","authors":"M. Lu, Yang Gao, Ming Zhu","doi":"10.3807/JOSK.2016.20.6.745","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.6.745","url":null,"abstract":"A detection algorithm, based on the combined local-global (CLG) optical-flow model and Gaussian pyramid for a moving target appearing against a dynamic background, can compensate for the inadaptability of the classic Horn–Schunck algorithm to illumination changes and reduce the number of needed calculations. Incorporating the hypothesis of gradient conservation into the traditional CLG optical-flow model and combining structure and texture decomposition enable this algorithm to minimize the impact of illumination changes on optical-flow estimates. Further, calculating optical-flow with the Gaussian pyramid by layers and computing optical-flow at other points using an optical-flow iterative with higher gray-level points together reduce the number of calculations required to improve detection efficiency. Finally, this proposed method achieves the detection of a moving target against a dynamic background, according to the background motion vector determined by the displacement and magnitude of the optical-flow. Simulation results indicate that this algorithm, in comparison to the traditional Horn-Schunck optical-flow algorithm, accurately detects a moving target undergoing illumination changes against a dynamic background and simultaneously demonstrates a significant reduction in the number of computations needed to improve detection efficiency.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"20 1","pages":"745-751"},"PeriodicalIF":0.0,"publicationDate":"2016-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70141362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Destripe Hyperspectral Images with Spectral-spatial Adaptive Unidirectional Variation and Sparse Representation 基于光谱空间自适应单向变化和稀疏表示的高光谱图像去条纹

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.752

Dabiao Zhou, Dejiang Wang, Lijun Huo, P. Jia

引用次数: 2

Cross-Correlation Measurements of Phase Noise Induced by Relative Intensity Noise in Photodetectors 光电探测器中相对强度噪声引起的相位噪声的互相关测量

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.694

Zhewei Cao, Chun Yang, Zhenghua Zhou

引用次数: 1