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	Research on spatial positioning technology of large size anomalous off-Axis optical element 会议论文 OAI收割 Shenzhen, China, 2023-08-04 作者: Peng, Wang; Fan, Yang; Bin-Dong, Ji; Wang-Tao, Ren; Xing, Song \| 收藏 \| 浏览/下载：4/0 \| 提交时间：2024/02/28 Irregular shape Off-axis Optical element Spatial positioning Computer aided installation and adjustment
	Fastening torque simulation method of pressure-ring based on finite element simulation analysis and experimental verification 会议论文 OAI收割 Shanghai, China, 2021-10-28 作者: Zhao, Yue; Kang, Shifa; Fu, Xihong; Zhang, Gaopeng \| 收藏 \| 浏览/下载：50/0 \| 提交时间：2022/03/18 Optical adjustment Tightening moment Connection strength Simulation modeling Finite element analysis
	基于附加参数光束法平差的非量测型数码相机检校研究/Calibration of a Nonmetric Camera Based on Bundle Adjustment with Additional Parameters[J] 期刊论文 OAI收割遥感信息, 2014, 卷号: 29, 期号: 3, 页码: 14-18 作者: 曹良中; 杨辽; 李欣; 张伟阁; 贾洋 \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2017/12/29 附加参数光束法平差非量测型数码相机室内三维检校场光学畸变差内方位元素 Bundle Adjustment With Additional Parameters Nonmetric Camera Three-dimensional Indoor Calibration Field Lens Optical Distortion Element Of Interior Orientation
	MAC protocol with dynamic priority adjustment for light trail networks (EI CONFERENCE) 会议论文 OAI收割 Network Architectures, Management, and Applications VIII, December 8, 2010 - December 12, 2010, Shanghai, China 作者: Fang W.; Li S. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 In order to improve the wavelength utilization as well as the fairness of the light trail networks we modified the FP MAC from the view point of weight balance by introducing a weight mode. The weight mode is composed of two factors real-time factor and node activity ratio. Moreover the weight mode is used as a bid by each LT node to compute the priority. Hence the priority of the LT node is adjusted dynamically in every round and the MAC protocol with dynamic priority adjustment is entitled as DPA MAC. Simulation results show that the performances of DPA MAC protocol are much better than that of FP MAC protocol in terms of packet loss rate and activity percentile. 2011 Copyright SPIE - The International Society for Optical Engineering.
	Dynamic closed-loop test for real-time drift angle adjustment of space camera on the Earth (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者: Xu S.; Wang D. 收藏 \| 浏览/下载：36/0 \| 提交时间：2013/03/25 In order to eliminate the influence of aircraft attitude angle to the image quality of space camera and assure that the drift angle of space camera could be accurately adjusted at the orbit a novel closed-loop test method is provided for real-time drift angle adjustment of space camera on the Earth. A long focal length dynamic aim generator is applied to simulate the image motion and the variety drift angle and to detect the precision of the image motion compensation machinery and the capability of the drift angle control system. The computer system is used to control the dynamic aim generator accomplish the data processing transmit and receive the data information. The seamless connection and the data transmission between the aim generator and the aircraft simulation devices are constituted. The command parameter and drift angle data transmitted by the simulation devices are received by the space camera at the real time then the photos are taken and the draft angle is adjusted simultaneously. It is shown that the drift angle can be accurately tracked by the space camera at the real time and the detective method satisfies the test requirement. 2010 Copyright SPIE - The International Society for Optical Engineering.
	扩散光学断层成像研究及其应用学位论文 OAI收割工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2007 作者: 赵青收藏 \| 浏览/下载：55/0 \| 提交时间：2015/09/02 扩散光学断层成像多中心光纤排布模式 LSA算法基于反S型的光子密度调整深度分辨率大脑成像乳腺成像 diffuse optical tomography multicentered mode layer-based sigmoid adjustment depth resolution brain imaging breast imaging image quality
	Support technique of ultra thin mirror in space optics (EI CONFERENCE) 会议论文 OAI收割 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 2, 2005 - November 5, 2005, Xian, China 作者: Ren J.-Y.; Gao M.-H. 收藏 \| 浏览/下载：34/0 \| 提交时间：2013/03/25 With the development of space optical system the technique of ultra thin mirror come forth and is paid more attention because of less difficulty in machining low cost lightweight no disassembly during detecting and maintaining. The key technique takes advantage of deformation of ultra thin mirror as the influence of environment to adjust the surface figure. Its accuracy meets requirement. An analysis method is based on finite element analysis (FEA) and many items including the amount of support points the way of arrangement the optimum design of support component are studied. The finite element method was used to analyze the mirror and some different mirror support schemes. The principal aim of the mirror analysis is to get numbers of support points and the ways of the support. There are three schemes including 12-6-1 12-8-1 and 16-8-1 models. Deformation of deadweight is calculated under the three conditions. The way of 16-8-1 is more suitable than the designs of other two. The support subassembly is amended to meet with the mirror surface RMS in the range of 30m. Deformation of the mirror with support structure has been calculated. The result is 16.52nm lower than a quarter of the wavelength which indicates the feasibility of the support scheme applied to mirror. Theoretical result for the best way of support is presented. The result of analysis shows that requirement surface figure could be met through adjusting support points. It predicts feasibility of the support technique and provides theoretical value for active adjustment in the laboratory. At present support and adjusting experiment of ultra thin mirror is being carried on.
	Self Imaging technique for refocusing an aerospace camera (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China 作者: Li W.; Li W.; Wang X.; Wang X.; Wang X. 收藏 \| 浏览/下载：34/0 \| 提交时间：2013/03/25 A novel auto-focusing technique using a self imaging approach is developed for an aerospace camera having large aperture and long focus. Its optical system consists of an emitting system receiving system and two penta-prisms. Emitting system has three parts: a light source beamsplitter and aim slit. The receiving system includes a field lens two separate lenses and CCD. Using two little penta-prisms instead of a large planar mirror makes the autofocus system simple and compact. CCD was used as photoelectric converting device. A defocused signal is acquired by measuring the change of the two slit self-images position imaged on the CCD. A simple and compact construction of the auto-focusing system was proposed. The algorithm to calculate the moving of the slit-self images position was analyzed in order to achieve subpixel position estimation. The results of the experiments show a 10m focusing precision. The system demonstrates high resolution easy adjustment and high reliability.