Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-09-17 DOI: 10.12086/OEE.2020.190734

Zhang Yufan, Li Xin, Lv Weichao, Chen Jiawang, Zheng Minhui, Xu Jing

引用次数: 1

The consistent of laser pointing and theodolite tracking 激光指向与经纬仪跟踪的一致性

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-09-17 DOI: 10.12086/OEE.2020.190438

Jia Wenwu, Zhang Sanxi, Lei Tao

{"title":"The consistent of laser pointing and theodolite tracking","authors":"Jia Wenwu, Zhang Sanxi, Lei Tao","doi":"10.12086/OEE.2020.190438","DOIUrl":"https://doi.org/10.12086/OEE.2020.190438","url":null,"abstract":"The distance between the laser optical axis and the tracking optical axis of the theodolite (axis shift) and the parallelism error of the optical axis cause the tracking position of the theodolite to be inconsistent with the laser pointing position.The analysis of the influence of off-axis and parallelism errors shows that a large amount of shift and parallelism errors will lead to inconsistencies between the laser pointing and the theodolite tracking pointing, which in turn leads to an increase in the blind zone of the laser ranging, a decrease in the operating distance and the accuracy of target positioning. A dynamic correction method for laser pointing based on bias tracking is proposed. By keeping the target always at the center of the laser beam and keeping the laser ranging position consistent with the theodolite tracking and locking position, it effectively solves the effect of laser edge energy drop on the operating distance. For a certain type of theodolite, the blind spot of the target can be reduced from 1 km to 82 m. At the same time, in view of the problem that the bias tracking algorithm needs the initial distance of the target to start the bias tracking, a one-dimensional search method for the target with unknown initial distance is proposed, which greatly improves the search efficiency of the target with unknown initial distance. The method in this paper solves the problem of the consistency between the tracking position of the theodolite and the pointing position of the laser, and greatly reduces the limitation on the shift and parallelism of the laser optical axis and the theodolite tracking optical axis","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76282130","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

Optimizing the location of multiple laser guide stars in ground layer adaptive optical systems 地面层自适应光学系统中多颗激光导星位置的优化

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-09-17 DOI: 10.12086/OEE.2020.190515

Cai-Lian Li, Jia Peng, Dongmei Cai

{"title":"Optimizing the location of multiple laser guide stars in ground layer adaptive optical systems","authors":"Cai-Lian Li, Jia Peng, Dongmei Cai","doi":"10.12086/OEE.2020.190515","DOIUrl":"https://doi.org/10.12086/OEE.2020.190515","url":null,"abstract":"At present, the ground layer adaptive optical systems are using multiple laser guide stars arranged in regular polygons as reference targets to measure the effects of atmospheric turbulence. Obtaining the optimal position of laser guide stars becomes an interesting problem to analyze. This paper proposes a method to obtain the optimal position of laser guide stars by using a genetic algorithm as the optimization algorithm and a simplified geometry model of the ground layer adaptive optic system as the evaluation function. Furthermore, multi-process, Numba library, and multi-thread techniques methods are used to accelerate calculation speed. Based on these methods, real atmospheric turbulence profiles are used to analyze the relationship between the optimal position of laser guide stars with different numbers and the different atmospheric turbulence profiles from the same site, through an example of a ground layer adaptive optics system with 14 arcmin field of view. The results show that the optimal position of laser guide stars in the same site is almost the same and their statistically optimal positions are all regular polygon. Besides, we also find that the spatial resolution of turbulence profiles has strong effects to positions of laser guide stars, showing that the more equivalent layers in the measurement results, the closer the position distribution of laser guide stars is to the regular polygon.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84058619","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

Research on laser frequency locking technology based on temperature and PZT control 基于温度和压电陶瓷控制的激光锁频技术研究

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-09-17 DOI: 10.12086/OEE.2020.190523

Lei Ming, Yu Huaiyong, Fang Yuan, Xiang-Peng Qiang, Y. Yi, Zhang Lizhe

{"title":"Research on laser frequency locking technology based on temperature and PZT control","authors":"Lei Ming, Yu Huaiyong, Fang Yuan, Xiang-Peng Qiang, Y. Yi, Zhang Lizhe","doi":"10.12086/OEE.2020.190523","DOIUrl":"https://doi.org/10.12086/OEE.2020.190523","url":null,"abstract":"Aiming at the application requirement of resonator fiber optic gyroscopes, a frequency tracking and locking control scheme based on laser temperature and PZT control is proposed in this paper. By taking advantages of the large range of laser temperature tuning as well as the high precision and high dynamicity of PZT tuning, tracking of the fiber laser’s central frequency to the fiber ring resonator’s resonance frequency is realized. Typical transmission resonant curve is simulated by mathematical methods. Hardware design, algorithm simulations of temperature and PZT control scheme are carried out. The influence of control parameters on tracking stability is analyzed. The development of laser frequency tracking systems is assembled. The high-precision and long-time tracking of laser’s central frequency to resonance frequency is realized successfully. The locking precision is low to 4.8×10-9 over one hour under room temperature. The locking precision is low to 9.74×10-8 over 5.5 hours under variable temperature. This work has laid an important foundation for improving the long-term performance of resonator fiber optic gyroscopes.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82930274","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

In-situ deflectometric measurement of optical surfaces for precision manufacturing 精密制造光学表面的原位偏转测量

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-09-01 DOI: 10.12086/OEE.2020.190581

Zhang Xiangchao, Xu Min

{"title":"In-situ deflectometric measurement of optical surfaces for precision manufacturing","authors":"Zhang Xiangchao, Xu Min","doi":"10.12086/OEE.2020.190581","DOIUrl":"https://doi.org/10.12086/OEE.2020.190581","url":null,"abstract":"The in-situ measurement of complex optical surfaces is a challenging task in precision engineering. The phase measuring deflectometry is a powerful measuring method for complex specular surfaces, and it has higher measuring efficiency, stability and dynamic range compared to interferometry. Consequently it is promising to widespread applications in various fields. Deflectometry is essentially a calibration problem, and the measuring accuracy is directly determined by the quality of geometrical calibration. An in-situ deflectometric measuring system is designed based on the single point diamond turning machine. A self-calibration method is developed to specify the relative positions of the camera and screen. Ray tracing is conducted at two positions of an auxiliary reflecting mirror, which is mounted on an air bearing spindle. The accuracy of the geometrical positions can be improved by an order of magnitude by minimizing the deviations of the traced points with respect to the true correspondences. According to the statistical properties of the deviations in reverse ray tracing, the form errors and the position errors can be separated, and the positioning error of the workpiece can be corrected accordingly. Henceforth, the nominal shape of the fabricated workpiece can be fully utilized, and the conventional one-way position-form mapping can be converted into a two-way mapping problem. As for the complex shapes, the whole surface can be covered by sub-aperture measurement. Precise localization of a local region under test is achieved by multi-position imaging, so that correct convergence of the iterative reconstruction process can be guaranteed. Several typical optical surfaces including an off-axis paraboloid mirror are measured, and the measuring accuracy of the proposed method is proved better than 150 nm RMS.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89956188","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

The research progress of surface interferometric measurement with higher accuracy 高精度表面干涉测量的研究进展

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-08-31 DOI: 10.12086/OEE.2020.200209

Hou Xi, Z. Shuai, Hu Xiaochuan, Quan Haiyang, Wu Gao-feng, Jiao Xin, He Yi-wei, Chengwen Qiang, Wu Fan

引用次数: 1

Current status of ultra-precision manufacturing of complex curved aluminum reflectors 复杂曲面铝反射器超精密制造现状

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-08-31 DOI: 10.12086/OEE.2020.200147

X. Chao, Peng Xiaoqiang, Dai Yifan

引用次数: 1

Preparation and environmental simulation tests of large-size silicon carbide brazed reflection mirrors 大型碳化硅钎焊反射镜的制备及环境模拟试验

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-08-31 DOI: 10.12086/OEE.2020.200088

Liu Yan, Zhang Hui, Liu Leimin, Yang Xiao, H. Jian, Liu Xue-jian, Chen Zhong-ming, Huang Zheng-ren

引用次数: 1

Shape measurement of stressed mirror based on stereoscopic phase measuring deflectometry 基于立体相位测量偏转法的应力反射镜形状测量

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-08-31 DOI: 10.12086/OEE.2020.190435

C. Zhenyi, Zhao Wen-chuan, Zhang Qican, Han Yu, Liu Yuankun

{"title":"Shape measurement of stressed mirror based on stereoscopic phase measuring deflectometry","authors":"C. Zhenyi, Zhao Wen-chuan, Zhang Qican, Han Yu, Liu Yuankun","doi":"10.12086/OEE.2020.190435","DOIUrl":"https://doi.org/10.12086/OEE.2020.190435","url":null,"abstract":"Stressed polishing technology transforms aspheric fabrication into spherical fabrication by applying pre-determined loads on the surface of the mirror. The key to achieve high precision of stressed polishing is to test the surface deformation with high precision. Stereoscopic phase measuring deflectometry was used to test the surface topography and the deformation of stressed mirror. After obtained unwrapped phase distribution, and combined with normal consistency constraint and gradient integral algorithm, the height distribution was finally obtained. Composition of systematic errors were simulated. Also, the errors were calibrated and removed by N-step averaging method in this system, which improved the measuring precision. In this paper, the surface topography and the deformation of a stressed mirror with a diameter of 320 mm, spherical radius of 5200 mm were measured. The measuring results were consistent with the corresponding result of CMM and finite element simulation, indicating that this proposed method is on the level of micron in terms of accuracy and more suitable for the test of stressed mirror compared with interferometer and CMM.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76794691","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

Research on flying cutting technology with micro pyramid array structure 微金字塔阵列飞切技术研究

Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2020-08-31 DOI: 10.12086/OEE.2020.190179

Du Dan, Huang Yuetian, Fan Bin

引用次数: 1

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