Chinese Journal of Optics and Applied Optics最新文献_第7页

Design and fabrication of 4 channels silica cross optical waveguide delay line array 四通道硅交叉光波导延迟线阵列的设计与制作

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140703.0435

李. L. Hao, 宋玲玲 Song Ling-ling, 张立钧 Zhang Li-jun, 王焕然 Wang Huan-ran, 李. L. Liang, 王. W. Fei, 衣云骥 Yi Yun-ji, 张大明 Zhang Da-ming

{"title":"Design and fabrication of 4 channels silica cross optical waveguide delay line array","authors":"李. L. Hao, 宋玲玲 Song Ling-ling, 张立钧 Zhang Li-jun, 王焕然 Wang Huan-ran, 李. L. Liang, 王. W. Fei, 衣云骥 Yi Yun-ji, 张大明 Zhang Da-ming","doi":"10.3788/CO.20140703.0435","DOIUrl":"https://doi.org/10.3788/CO.20140703.0435","url":null,"abstract":"In this paper,an integrated 4-channels silica optical waveguide delay line array with low cost and low propagation loss was designed and manufactured. BPM software was selected to simulate the associated pa-rameters,including Y splitter and bend loss. In order to reduce the device size and insertion loss,the smallest bending radius of the delay line was selected to be 1 500 μm. And the structure of optimizing gradient Y splitter and right angle intersecting waveguide were optimized. The cross waveguide delay line device was manufactured by standard semiconductor manufacturing processes. The output infrared pattern was obtained. The delay time of each channel was 0 ps,113 ps,226 ps and 339 ps,respectively. The 4-channels silica waveguide delay line device can achieve an equal interval of delay time between the adjacent channels. It can be integrated with itself for several times to increase delay time. The output waveguide of the device can be integrated with the optical fiber array at the same time.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"2 1","pages":"435-441"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83015225","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: 0

An improved non-local mean filter filtering algorithm facing the cerebrovascular segmentation 一种面向脑血管分割的改进非局部均值滤波算法

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140704.0572

陈. C. Xing, 宋智洋 Song Zhi-yang, 周明全 Zhou Ming-quan, 武仲科 Wu Zhong-ke, 王醒策 Wang Xing-ce

引用次数: 2

Simulation on the law of wave-front shaping with stochastic parallel gradient descent algorithm for adaptive optics 自适应光学中随机平行梯度下降算法波前整形规律的仿真

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140703.0411

王卫兵 Wang Wei-bing, 王挺峰 Wang Ting-feng, 郭. G. Jin

引用次数: 0

Fast recognition on star pattern with method of three FOVs based on rough location and azimuth 基于粗糙位置和方位角的三视场快速星图识别方法

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140705.0768

王昊京 Wang Hao-jing, 王建立 Wang Jian-li, 吴量 Wu Liang, 张世学 Zhang Shi-xue, 贾建禄 Jia Jian-lu

引用次数: 1

Tunable terahertz and optical metamaterials 可调谐太赫兹和光学超材料

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140703.0349

张检发 Zhang Jianfa, 袁晓东 Yuan Xiaodong, 秦石乔 Qin Shi-qiao

引用次数: 1

Fabrication and test of SiC convex aspheric mirror 碳化硅凸面镜的制造与测试

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140702.0287

李俊峰 Li Jun-feng

{"title":"Fabrication and test of SiC convex aspheric mirror","authors":"李俊峰 Li Jun-feng","doi":"10.3788/CO.20140702.0287","DOIUrl":"https://doi.org/10.3788/CO.20140702.0287","url":null,"abstract":"In order to satisfy all-frequency error quality controlling and high-precision test during the process of the convex asphere,double laps with polar coordinate polishing technique and the measuring poles method used for the alignment of Hindle test are proposed.Firstly,the double laps with polar coordinate polishing technique for manufacturing the aspheric mirror and the numerical control machine for processing aspheric surface are presented.Then,the measuring poles method used to control the distances between vertex of the standard sphere and the vertex and focus of the tested asphere is introduced,and the controlling precision is analyzed.Finally,for a convex asphere with the aperture of Φ158 mm,the test results and precision of the Hindle test are described.The results indicate that the double laps polishing technique can make the low-frequency surface error convergence quickly,and the mid-frequency surface error is restrained at the same time.The controlling precision of the low-frequency surface error is about λ /30(λ = 633 nm).The limit error using the measuring poles to control the distance is ± 0.065 mm,and the tolerances of the two space parameters are ± 0.22 mm and ± 0.30 mm,respectively.The fast manufacture and all-frequency controlling of the convexasphere are realized by the double laps with polar coordinate polishing technique,and the test result of lowfrequency surface error is 0.022λ(RMS,@ 633 nm) in the Hindle test,which satisfies the specification requirements of the optical design.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"98 1","pages":"287-292"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74253331","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: 0

Multiple sub-histogram equalization low light level image enhancement and realization on FPGA 多个子直方图均衡化弱光图像增强及FPGA实现

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140702.0225

陈. C. Ying, 朱. Z. Ming

{"title":"Multiple sub-histogram equalization low light level image enhancement and realization on FPGA","authors":"陈. C. Ying, 朱. Z. Ming","doi":"10.3788/CO.20140702.0225","DOIUrl":"https://doi.org/10.3788/CO.20140702.0225","url":null,"abstract":"In order to solve the problems that low light level image has low contrast and it is difficult to distinguish objective,it is necessary to research on low light level image enhancement algorithm.A multiple subhistogram equalization enhancement algorithm is proposed.Initially,in the proposed algorithm,the histogram are separated into four parts according to the area equally.Then,the resultant sub-histograms are clipped according to the average number of pixels of input image to reduce the enhancement phenomenon.In addition,the scale factor is adopted to adjust dynamic range.Finally,each sub-histogram is equalized.The algorithm is implemented on FPGA with verilog language,and is given subjective and objective evaluation.With this algorithm good results can be achieved in real-time on the hardware platform,and the delay of an image processing is about 0.45 ms.Experimental results show that with this proposed algorithm no saturation and noise amplification phenomenon appear,and image details of the processed image are well preserved and highlighted.Thealgorithm meets the real-time requirement and the enhanced images of better visual effect can be achieved.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"198 1","pages":"225-233"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72567315","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

Simultaneous measurement of temperature and concentration of sugar solution based on hybrid fiber grating sensor 基于混合光纤光栅传感器的糖溶液温度和浓度的同时测量

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140703.0476

赵明富 Zhao Ming-fu, 王年 Wang Nian, 罗彬彬 Luo Bing-bing, 施玉佳 Shi Yu-jia, 曹立华 Cao Li-hua

{"title":"Simultaneous measurement of temperature and concentration of sugar solution based on hybrid fiber grating sensor","authors":"赵明富 Zhao Ming-fu, 王年 Wang Nian, 罗彬彬 Luo Bing-bing, 施玉佳 Shi Yu-jia, 曹立华 Cao Li-hua","doi":"10.3788/CO.20140703.0476","DOIUrl":"https://doi.org/10.3788/CO.20140703.0476","url":null,"abstract":"In order to accurately measure temperature and concentration of sugar solution at the same time,we presented a hybrid fiber grating sensor. Firstly,based on mode coupling theory,hybrid fiber gratings were formed using fiber Bragg grating and long-period fiber grating,which could realize dual-parameters measurement. In this hybrid fiber grating,FBG response to temperature measurement,while LPFG response to simulataneous measurement of sugar solution concentration and temperature. Then,in two linear refractive index ranges,that is,from 1. 33 to 1. 42 and from 1. 42 to 1. 44,we calibrated correlation coefficient of temperature and sugar concentration. Finally,two sensitivity coefficient matrixes were constituted to discuss the method of measuring temperature and sugar solution concentration simultaneously. Experimental results indicate that the measuring sensitivity of temperature reaches 117. 9 pm / K,and sugar solution concentration reaches – 213. 5pm / RIU. Therefore,the modular fiber grating sensor has high sensitivity property as the photochemical sensor.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"57 1","pages":"476-482"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79754772","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: 0

Application of SUSAN definition evaluation function in auto-focusing SUSAN清晰度评价函数在自动对焦中的应用

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140702.0240

张艳超 Zhang Yan-chao, 赵. Z. Jian, 韩希珍 Han Xi-zhen, 刘博超 Liu Bo-chao

引用次数: 3

Miniature design of 5×zoom optical system 5×zoom光学系统的微缩设计

Chinese Journal of Optics and Applied Optics Pub Date : 2014-01-01 DOI: 10.3788/CO.20140702.0315

王. W. Hong, 田铁印 Tian Tie-yin

引用次数: 0