中国科学院机构知识库网格系统: 检索

Pragmatic Implementation With Non-Gaussian Devices of Noise-Limited Weak Value Amplification 期刊论文 OAI收割
IEEE PHOTONICS JOURNAL, 2021, 卷号: 13, 期号: 2, 页码: 11
作者: Wu, Hao; Wu, Peng; Luo, Zheng-Chun; Xu, Li-Ping; Xie, Jia-Heng

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收藏 | 浏览/下载：34/0 | 提交时间：2021/04/06

Phase measurement Wave functions Measurement uncertainty Couplings Sensitivity Light sources Frequency measurement Weak measurement phase estimation precision optimization

Trc-based high-precision spot position detection in inter-satellite laser communication 期刊论文 OAI收割
Sensors, 2020, 卷号: 20, 期号: 19, 页码: 1-14
作者: Li, Qing; Guo, Hongyang; Xu, Shaoxiong; Xu, Yangjie; Wang, Qiang

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收藏 | 浏览/下载：45/0 | 提交时间：2021/05/11

inter-satellite laser communication system weak light-spot position detection four-quadrant detector time reversal convolution

Ultrasensitive negative photoresponse in 2D Cr2Ge2Te6 photodetector with light-induced carrier trapping 期刊论文 OAI收割
NANOTECHNOLOGY, 2018, 卷号: 29, 期号: 46
作者: Xie, Liu; Guo, Lei; Yu, Wenzhi; Kang, Tingting; Zheng, Ren-Kui

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收藏 | 浏览/下载：58/0 | 提交时间：2018/12/28

photodetector negative photoconductivity weak light 2D Cr2Ge2Te6

A non-derivative method for the quantitative analysis of isosteroidal alkaloids from Fritillaria by high performance liquid chromatography combined with charged aerosol detection 期刊论文 OAI收割
TALANTA, 2016, 卷号: 151, 页码: 239-244
作者: Long, Zhen; Guo, Zhimou; Acworth, Ian N.; Liu, Xiaoda; Jin, Yan

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收藏 | 浏览/下载：27/0 | 提交时间：2019/06/20

Isosteroidal Alkaloids Weak Uv Absorbance Compound Charged Aerosol Detector Evaporative Light Scattering Detector Quantitative

A comprehensive simulation of weak-light phase-locking for space-borne gravitational wave antenna 期刊论文 OAI收割
SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2016, 卷号: 59, 期号: 5, 页码: 730-737
作者: Dong YH(董玉辉); Liu HS(刘河山); Luo ZR(罗子人); Li YQ(李玉琼); Jin G(靳刚)

收藏 | 浏览/下载：40/0 | 提交时间：2016/07/15

weak-light phase-locking gravitational wave detection heterodyne laser interferometer

Efficient photocatalytic removal of aqueous NH4+-NH3 by palladium-modified nitrogen-doped titanium oxide nanoparticles under visible light illumination, even in weak alkaline solutions 期刊论文 OAI收割
Chemical Engineering Journal, 2015, 卷号: 264, 页码: 728-734
D. C.; Sun Sun, W. Z.; Yang, W. Y.; Li, Q.; Shang, J. K.

收藏 | 浏览/下载：28/0 | 提交时间：2015/05/08

Aqueous ammonium-ammonia Palladium-modified nitrogen-doped titanium oxide Photocatalytic removal Visible-light Weak alkaline environment azo-dye semiconductor photocatalysis catalyst concentration water-treatment porous nickel waste-water oxidation tio2 degradation ammonia

Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文 OAI收割
作者: Lin G.-Y.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution high spectral resolution and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating which make the anterior Wadsworth condition fulfilling each wavelength is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Wang S.-R.; Lin G.-Y.; Yu L.

收藏 | 浏览/下载：39/0 | 提交时间：2013/03/25

Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.

A design of beam shaping unit for 193nm lithography illumination system using angular spectrum theory (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Zhao Y.; Zhang W.; Zhang W.; Li S.; Gong Y.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

Off-axis illumination (OAI) technology is widely used to enhance resolution for deep ultraviolet lithography. The realizing methods of OAI include geometrical optics method and physical optics method. However the former has the disadvantage of weak intensity distribution controlling ability and the latter introduces simulation errors evidently when dealing with near field diffraction propagation. A diffractive optical element (DOE) designing method using plane wave angular spectrum theory is presented in this paper. Several kinds of OAI modes at near field away from DOE can be realized and simulation errors and the size of illuminator are also reduced. According to studying the relationships of the sampling point distance of DOE light beam propagation distance and the structure of the beam shaping unit a method of determining the designing parameters is discussed. Using this method several illumination modes are realized and simulation results show that all diffraction efficiencies reach up to 84%. The method of DOE manufacturing is analyzed at last and it is proven to be feasible. 2010 SPIE.

Space camera imaging gain in-orbit adjusting strategy (EI CONFERENCE) 会议论文 OAI收割
2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009, October 10, 2009 - October 11, 2009, Changsha, Hunan, China
作者: Wang J.; He X.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

A Multi-Step Gain Adjusting Strategy (MSGAS) of space camera was proposed which was used to get higher SNR (Signal-Noise Rate) image. When the space camera working in poor light condition the CCD signal was so weak that it's difficult to get a clear image to reduce the quantization noise and improve the SNR we must amplify the CCD signal first and then quantize. The MSGAS was achieved by adjusting the gain of the CCD (Charge Couple Device) signal processor step by step the upper limit and lower limit were set if the MDN (Mean Digital Number) of a fixed length image data was not between the lower and upper limit the gain was adjusted step by step. In the experiment the upper limit lower limit and the step were set and the result of the experiment showed that MSGAS was robust and SNR was improved from 28 to 39. 2009 IEEE.