Characterization of OCam and CCD220: the fastest and most sensitive camera to date for AO wavefront sensing

Recent progress in low light level superspeed EMCCD imaging

“…国外已有几十家如 Andor 等公司生产和研制 EMCCD 相机, 可实现光子级计数, 但普遍设计较为 保守, 不能满足某些特殊领域的应用需求 [21] . 针对 EMCCD 电子倍增的驱动方法, 美国纽约州立大学和 英国谢菲尔德大学等采用图腾柱实现 EMCCD 驱 动 [22~24] ; 部分单位采用变压器来产生正弦的电子倍 增驱动信号 [25,26] ; 为欧南天文台项目研制的 OCam 相 机中使用 DAC 和甲乙类放大器来实现任意波形驱动, 输出信号的稳定性达到 1 h 低于 1 mV 的漂移 [27] ; 加 拿大蒙特利尔大学也使用任意时钟发生器结合放大 器进行驱动 [28,29] .…”

OCAM2S: an integral shutter ultrafast and low noise wavefront sensor camera for laser guide stars adaptive optics systems

“…General structure CCD219 was the name chosen by e2v technologies for this detector. The CCD219 is a derivative of the CCD220 [2], [3], [4] (schematic in Figure 1) which is a 24 µm square 240x240 pixels split frame transfer back illuminated L3Vision CCD. The image and store area (store is optically shielded) are built with 2-phase metal-buttressed parallel clock structures to enable fast line shifts in excess of 7 Mlines/s for total transfer time from image to store of 18 µs and low smearing of under 2% at 1,200 fps.…”