中国科学院机构知识库网格系统: 检索

High-power operation and lateral divergence angle reduction of broad-area laser diodes at 976 nm 期刊论文 OAI收割
Optics and Laser Technology, 2021, 卷号: 141
作者: Liu, Yuxian; Yang, Guowen; Wang, Zhenfu; Li, Te; Tang, Song

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收藏 | 浏览/下载：54/0 | 提交时间：2021/05/08

Semiconductor laser Diode laser High power High efficiency Low divergence angle High brightness 976 nm

Detection of high flux synchrotron radiation based on diamond detector for heps 期刊论文 iSwitch采集
Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment, 2019, 卷号: 924, 页码: 305-308
作者: Li Zhenjie; Wang Bingjie; Chang Guangcai; Li Qiuju; Zhou Yangfan

收藏 | 浏览/下载：112/0 | 提交时间：2019/04/22

Diamond detector Heps High brightness synchrotron radiation Beam position

Detection of high flux synchrotron radiation based on diamond detector for heps 期刊论文 iSwitch采集
Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment, 2019, 卷号: 924, 页码: 305-308
作者: Li Zhenjie; Wang Bingjie; Chang Guangcai; Li Qiuju; Zhou Yangfan

收藏 | 浏览/下载：112/0 | 提交时间：2019/04/22

Diamond detector Heps High brightness synchrotron radiation Beam position

Dynamic nonlinear transformation algorithm in LED display panel (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Computational Intelligence and Natural Computing, CINC 2010, September 13, 2010 - September 14, 2010, Wuhan, China
Chang F.; Zheng X.-F.; Wang R.-G.; Ding T.-F.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In order to ensure high quality display results of LED display panel in all kinds of ambient brightness a dynamic nonlinear transformation algorithm is proposed. First the implementation processes of the method of lock-up table nonlinear transformation are described which is the traditional method of nonlinear transformation. Second an algorithm model of dynamic nonlinear transformation is constructed Third the algorithm realization steps are discussed on the basis of the constructed algorithm model. Finally the relationship between the coefficient of nonlinear transformation and ambient brightness is analyzed. Experimental results indicate regardless of ambient brightness this algorithm is able to ensure that the contrast of LED display panel does not decrease so the display results of LED display panel is good. 2010 IEEE.

Driving and image enhancement for CCD sensing image system (EI CONFERENCE) 会议论文 OAI收割
2010 3rd IEEE International Conference on Computer Science and Information Technology, ICCSIT 2010, July 9, 2010 - July 11, 2010, Chengdu, China
Zhang M.; Ren J.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

The paper designs a driving circuit of high sensitive wide dynamic for CCD sensing imaging system which adopts a Dalsa-made high resolution full-frame 33-mega pixels area CCD FTF5066M. Field Programmable Gate Array (FPGA) is used as the main device to accomplish the timing design of the circuits and power driver control of the sensor. By using the Correlated Double Sampling (CDS) technique the video noise is reduced and the SNR of the system is increased. The output rate of the imaging system designed with integrated chip can reach to 1.3 frames per second through bi-channel output. We use the histogram specification to adjust the brightness of the captured image. And then use the median filtering to suppress the noise. The traditional gray mean gradient (GMG) and the objective evaluation method based on Human Visual System (HVS) used to verify the effect of image enhancement. 2010 IEEE.

The PLATO Dome A Site-Testing Observatory: Instrumentation and First Results 期刊论文 OAI收割
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2009, 卷号: 121, 期号: 876, 页码: 174-184
作者: Yang, H.; Allen, G.; Ashley, M. C. B.; Bonner, C. S.; Bradley, S.

收藏 | 浏览/下载：55/0 | 提交时间：2011/12/08

HIGH-ANTARCTIC PLATEAU SOUTH-POLE SKY BRIGHTNESS ATMOSPHERIC-TURBULENCE ASTRONOMY TELESCOPE ARRAY

Micro-motion exposure method based on PZT piezoelectric ceramics (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, June 17, 2009 - June 19, 2009, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：103/0 | 提交时间：2013/03/25

There mainly is laser digital photofinishing technique and digital photofinishing technique based on LCD consisting of TFT and LCOS in the digital photofinishing field at the present time. The former have a good many merit such as wide color gamut high processing rate large output size and high brightness but his cost is very high his maintain technique being comparatively complex that result in difficult use for people. The utilization ratio of the latter is low because of lower resolution and lower aperture ratio for LCD but the digital photofinishing based on LCD have lower cost and higher utilization ration being suitable for people's current standard of living. Considering above mentioned problem a micro-motion exposure method based on PZT piezoelectric ceramics used in digital image photofinishing is presented. The two-dimension micro-motion exposure system consisting of PZT piezoelectric ceramics LCD panel polarizing film and spring strip is designed. By means of PZT piezoelectric ceramics the LCD panel is removed about the one half of the pixel size of the LCD panel for four times from the original place at the same time imaging system is exposed four times at the printing paper. The software is used to control the time synchronization the exposure time and motion range of the LCD panel. The system has advantages such as shorter response time than 0.1seconds lesser motion error than 0.01 microns high stability and repeatability. Experimental results show that the proposed micro-motion exposure method improve the picture brightness and enlarge output size at the meantime reducing the cost of the system. 2009 SPIE.

High power diode laser with beam coupling (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China
作者: Wang L.; Liu Y.; Wang L.; Liu Y.; Liu Y.

收藏 | 浏览/下载：61/0 | 提交时间：2013/03/25

As the increasing applications of the semiconductor lasers in the laser processing the single 2-D stack optic-power density has not satisfied the actual requirements. It demands to couple several diode laser stack beams to one to improve the brightness and it becomes the central issue to adopt the appropriate beam coupling technology which would offer high quality and high efficiency. In this paper it mainly introduces the beam shaping and the technology of spatial coupling polarization coupling and wavelength coupling. The coupling key elements are presented and indicated. Finally the development of the diode laser on beam coupling in our country fell behind through analyzing the statement of the world. Our lab is studying on polarization coupling and wavelength coupling. We gain some results by phase which the polarization coupling efficiency can achieve 90% for two LD stacks with seven bars whose luminous wavelength is 975nm and980nm.By two 808nm diode laser coupling the efficiency of 60% can be achieved after focusing to the beam size of 22mm2. 2008 SPIE.

新一代大功率固体板条激光器的技术进展 期刊论文 OAI收割
激光与光电子学进展, 2007, 卷号: 44, 期号: 2, 页码: 48, 53
王志敏; 徐剑秋; 陈卫标

收藏 | 浏览/下载：1752/222 | 提交时间：2009/09/18

激光器 laser 板条激光器 slab laser 大功率 high power 高光束质量 high beam quality 亮度 brightness

Highly efficient electroluminescence from green-light-emitting electrochemical cells based on Cu-I complexes 期刊论文 OAI收割
advanced functional materials, 2006, 卷号: 16, 期号: 9, 页码: 1203-1208
Zhang QS; Zhou QG; Cheng YX; Wang LX; Ma DG; Jing XB; Wang FS

收藏 | 浏览/下载：29/0 | 提交时间：2010/08/17

CHELATED RUTHENIUM(II) COMPLEX TRIS(2 HIGH-BRIGHTNESS SINGLE-LAYER DEVICES DIODES LIGAND CU(I) 2'-BIPYRIDINE)RUTHENIUM(II) COMPLEXES