中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共5条，第1-5条

帮助

条数/页：排序方式：
	Auto-Alignment Non-Contact Optical Measurement Method for Quantifying Wobble Error of a Theodolite on a Vehicle-Mounted Platform 期刊论文 OAI收割 Tehnicki Vjesnik, 2024, 卷号: 31, 期号: 2, 页码: 449-459 作者: Li, Xiangyu; Hao, Wei; Xie, Meilin; Liu, Bo; Jiang, Bo \| 收藏 \| 浏览/下载：13/0 \| 提交时间：2024/05/22 autocollimator dual-axis inclinometer electro-optical theodolite optical measurement vehicle-mounted platform wobble error
	Embedded Measurement System of Two-dimensional Autocollimator based on FPGA 会议论文 OAI收割 Chongqing, PEOPLES R CHINA, 2017-10-03 作者: Gao, Xiang; Hu, Xiaodong; Yang, Donglai; Zhang, Jian; Gao, X (reprint author), Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian, Shaanxi, Peoples R China. \| 收藏 \| 浏览/下载：28/0 \| 提交时间：2018/03/06 Two-dimensional Autocollimator Miniaturization Embedded Fpga
	Design of the real-time autofocusing system for collimator with long focus length and large aperture (EI CONFERENCE) 会议论文 OAI收割 2011 International Academic Conference on Numbers, Intelligence, Manufacturing Technology and Machinery Automation, MAMT 2011, December 24, 2011 - December 25, 2011, Wuhan, China 作者: Zhang X.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：42/0 \| 提交时间：2013/03/25 Large aperture collimator which has been widely used for calibrating and testing various optical devices plays an essential role in correlative laboratories. As being the basic testing and calibration equipment the large aperture collimator's accuracy should be much higher than the device under testing in order to ensure the accuracy of the measurement. However the process of adjusting the collimator is extremely complicated due to the collimator's large aperture and long focal length. So it is difficult to ensure the measurement's quality and easy to cause the system being vulnerable to the surrounding environment. One of the most common problems is defocus. In order to solve the problem above this issue presents a new type of autocollimator autofocusing system which uses pentaprism instead of using large-aperture plane mirror semiconductor lasers as light source and CCD sensor as receiver. The system is smaller lighter and more convenient when using. The computer simulation shows that the autofocusing system's resolution could reach the accuracy of 40m. If we use the relevant algorithms to execute the sub-pixel scanning the resolution could reach the accuracy of 10m. It shows that the system could satisfy the required testing precision of testing large aperture optical device.
	Small roll angle measurement based on auto-collimation and moire fringe (EI CONFERENCE) 会议论文 OAI收割 2009 International Conference on Optical Instruments and Technology - Optoelectronic Measurement Technology and Systems, October 19, 2009 - October 22, 2009, Shanghai, China Bai X.-G.; Cai S.; Qiao Y.-F.; Dai M. 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/03/25 A novel method for small roll angle measurement based on auto-collimation and moire fringe is presented. A right-angle prism is used as an indicator of small roll angle around the optical axis and a CCD is used to collect moire fringes that are generated by scale grating image which is reflected by prism and index grating. Any small roll angle of the prism will change the include angle of the grating pair and meanwhile induce a change in the moire fringe period. The relationship between roll angle and period of moire fringes is established. The period data is obtained by image processing. The experimental result certifies that the principle of small angle measurement method based on auto-collimation and moire fringe is correct and feasible. The measuring error is smaller than 0.2 within 7 range compared with 0.2 autocollimator. 2009 SPIE.
	A high precision dynamic autocollimator 期刊论文 OAI收割 MEASUREMENT TECHNOLOGY AND INTELLIGENT INSTRUMENTS VI, 2005, 卷号: 295-296, 页码: 337-342 作者: Shen, MZ; Liao, S 收藏 \| 浏览/下载：23/0 \| 提交时间：2015/09/21 non-contact measurement optical measurement angular measurement dynamic autocollimator