模块化天文CCD通用控制器

为满足大规模拼接CCD天文观测应用系统对控制器的特殊要求,开展可扩展的模块化天文CCD通用控制器技术研究,并成功研制了样机系统.该系统采用相关双采样技术及控制技术等手段获得极低的读出噪声,采用全数字化的结构实现系统的通用性以及实现远程观测、远程监控的功能.测试结果表明,该系统的系统噪声小于3e~-,动态范围为16bit,非线性优于1%,满足现阶段大部分天文观测的需要.作为应用实例,利用本系统制作的真空紫外CCD相机,成功获得了He和氘121.5nm、164、193、205、218.6、273.3和294.5nm谱线的光谱图像,完成了对空间天文观测的102nm~320nm光谱仪的检测工作.

Development of an Astronomical Modularized CCD Universal Controller

To meet the increasing demands of large mosaic CCD cameras from astronomical observation,an modularized CCD universal controller was developed.The modularization design is based on the principle that the system can be extended easily to drive multiple CCDs.Great efforts are exerted to reduce the system noise of the controller.A fully digital structure is chosen therefore the clocking and biasing can be tuned to control different kinds of CCDs and all the controlling data can be monitored remotely.With efforts,the system's readout noise reaches 2.61e-,dynamic range 16 bit,nonlinearity less than 1％,and these parameters meetthe criteria required for most of the astronomical observations for the-time-being.With this controller,a CCD camera is constructed to test a spectrogaph which is designed to work from 102 nm to 320 nm for space astronomical observation and the spectrums of helium and deuterium lines of the 121.5,164,193,205,218.6,273.3 and 294.5 nm are acquired.