中国科学院机构知识库网格系统: 检索

A New Design of Large-format Streak Tube with Single-lens Focusing System 期刊论文 OAI收割
MEASUREMENT SCIENCE REVIEW, 2021, 卷号: 21, 期号: 6, 页码: 191-196
作者: Tian, Liping; Shen, Lingbin; Chen, Lin; Li, Lili; Tian, Jinshou

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收藏 | 浏览/下载：83/0 | 提交时间：2021/11/12

Ultrafast detector Streak tube single-lens focusing system large format

Design of secondary lens focusing mechanism for multispectral camera 会议论文 OAI收割
Xi'an, China, 2021-05-28
作者: Rui, Wang; Xiuqin, Su; Yongming, Qiao; Tao, Lv; Xuan, Wang

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收藏 | 浏览/下载：41/0 | 提交时间：2021/07/20

Secondary lens focusing mechanism Rhomboid amplifier large PZT actuator Flexible hinge Focusing speed Tilt error

Analysis of tilted multilayer Laue lens with stochastic layer thickness error 期刊论文 OAI收割
OPTICS COMMUNICATIONS, 2014, 卷号: 325, 页码: 111-115
作者: Liao KL(廖可梁); Hong YL(洪友丽); Wang QS(王秋实); Chang GC(常广才); 盛伟繁;Liao, K

收藏 | 浏览/下载：48/0 | 提交时间：2016/04/08

Multilayer Laue lens Nano-focusing X-ray optics

Polycapillary X-ray lens for the secondary focusing Beijing synchrotron radiation source 期刊论文 OAI收割
Chinese Physics B, 2013, 期号: 4, 页码: 248-252
作者: Li YD(李玉德); Lin XY(林晓燕); Liu SG(刘世岗); He JL(何金龙); Guo F(郭非)

收藏 | 浏览/下载：14/0 | 提交时间：2015/12/25

Beijing synchrotron radiation facility polycapillary X-ray lens secondary focusing

Hard X-ray one dimensional nano-focusing at the SSRF using a WSi2/Si multilayer Laue lens 期刊论文 OAI收割
CHINESE PHYSICS C, 2013, 卷号: 37, 期号: 2, 页码: 28002
作者: Huang, QS; Li, HC; Song, ZQ; Zhu, JT; Wang, ZS

收藏 | 浏览/下载：28/0 | 提交时间：2016/04/08

nano-focusing hard X-ray multilayer Laue lens synchrotron radiation diffraction

Design and analysis of auto-focus assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者: Chen W.; Gao X.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

Spaceborne remote sensing camera may be out of focus when the environment and photographic distance changes. In order to get higher ground sampled distance for the camera based on the experience gained from the development of a remote sensing camera working principle of auto-focus assembly control system was discussed. Time of waveform extraction was reduced. It sets force an auto-focus assembly that uses cam and line guide rail in order to move the lens group. The motion error of the auto-focus assembly was difficult to be eliminated and would affect on the focusing accuracy of the spaceborne remote sensing camera directly. So it was analyzed at both ends of the focusing structure. The CCD detector can keep stable when the remote sensing camera is imaging. The motion error was tested to verify the validity of the simulation result and it is less than 0.01mm. Its accuracy meets using demand. The focusing method of moving focal plane is suitable for spaceborne remote sensing camera. 2011 IEEE.

Polarization Effect on Superfocusing of a Plasmonic Lens Structured with Radialized and Chirped Elliptical Nanopinholes 期刊论文 OAI收割
PLASMONICS, 2010, 卷号: 5, 期号: 2, 页码: 175-182
作者: Shi, Zhenkui; Fu, Yongqi; Zhou, Xiuli; Zhu, Shaoli

收藏 | 浏览/下载：25/0 | 提交时间：2015/09/21

Polarization effect Plasmonic lens Elliptical nanopinholes Focusing

Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者: Zhao S.; Tian Y.-Z.; Liu L.-S.; Guo J.; Zhang H.-Y.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

In order to lead the laser beam transmit in the atmosphere convergently an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly the laser was collimated by a beam expander then the near-parallel laser beam was transmitted with a Galileo telescope system and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform so the focus of the system changed due to the tiny displacement of the concave lens. Secondly the average power of the laser spot can be measured using power meter the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm it is 10.43% of the total diameter of the laser spot. At last the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit attenuation in the atmosphere geometrical aberration of optical system and the diffraction limit and the geometrical aberration are significant in the three factors above so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.

Theoretical and experimental results of focusing performance for the parabolic compound X-ray refractive lenses 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2010, 卷号: 59, 期号: 3, 页码: 1977-1984
作者: Le, ZC; Dong, W; Liu, W; Zhang, M; Liang, JQ

收藏 | 浏览/下载：29/0 | 提交时间：2016/06/29

X-ray optics compound X-ray refractive lens X-ray focusing synchrontron radiation

Modeling and analysis of dialyte-lens auto-focusing technology for theodolite (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Wu L.-T.; Qiao Y.-F.; Wu D.-K.; Cai S.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In order to realize real-time auto-focusing for theodolite lens-apart method was designed with the corresponding math model built and analyzed. An Object beam splitted after the first image surface of the theodolite traveled through two dialyte lens and then was imaged on CCD. The distance between two spots when exactly focused was set as the calibration value and the relationship between defocus distance and spot offset was given. The influence of tracking center shift and divergence angle etc. on focusing accuracy was analyzed. Compared with the traditional focusing method this scheme has a higher accuracy faster calculation higher tolerance for environment temperature and a simpler construction. The experiment result exhibited a resolution higher than 0.056mm which shows a bright engineering application prospect for this method. 2009 SPIE.