多抽头EMCCD相机时序控制及像元合并技术  

Timing Control and Pixel Merger Technology of Multi-tap EMCCD Camera

作　　者：刘玲钰 王明富[1,3] 刘恩海 LIU Lingyu;WANG Mingfu;LIU Enhai(Institute of Optics and Electronics of the Chinese Academy of Sciences,Chengdu 610209,CHN;University of Chinese Academy of Sciences,Beijing 100049,CHN;Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement,Chinese Academy of Sciences,Chengdu 610209,CHN)

机构地区：[1]中国科学院光电技术研究所,成都610209 [2]中国科学院大学,北京100049 [3]中国科学院空间光电精密测量技术重点实验室,成都610209

出　　处：《半导体光电》2020年第3期420-425,共6页Semiconductor Optoelectronics

摘　　要：高速、高灵敏度相机在自适应光学系统中可以对波前误差进行实时测量,为大型地基望远镜提供接近衍射极限的目标图像。多抽头电子倍增电荷耦合器件(EMCCD)相机是自适应光学波前探测的最佳选择之一,基于8抽头的CCD220设计了2000f/s级高速、高精度、多路同步时序发生器,并通过时序控制的方法在CCD器件上实现了多种像元合并,进一步将相机帧频提高到3500f/s(2×2合并)和5700f/s(4×4合并),并能对相机感兴趣区域进行控制。时序发生器的步进精度可达到2.5ns,输出的各路驱动信号的相位抖动可达200ps以下。The adaptive optical system of a large ground-based telescope needs to use a highspeed and high-sensitivity camera to measure the wavefront error in real time to obtain a target image close to the diffraction limit.The multi-tap electron-multiplying charge coupled device(EMCCD)camera is one of the best choices for adaptive optical wavefront detection.Based on the8-tap CCD220,a high-speed(2000 f/s),high-precision and multi-channel synchronous timing generator is designed.A variety of pixel combinations have been implemented on the device,thus the camera frame rate is increased to 3500 f/s(2×2 merge)and 5700 f/s(4×4 merge),and the area of interest of the camera can be controlled.The stepping accuracy of the timing generator can reach 2.5 ns,and the phase jitter of each driving signal output can reach below 200 ps.

关 键 词：电子倍增 电荷耦合器件 高精度时序控制 像元合并 自适应光学 

分 类 号：TN386.5[电子电信—物理电子学]