Update on development of WFS cameras at ESO for the ELT
Update on development of WFS cameras at ESO for the ELT
复制标题
ESO 为 ELT 开发 WFS 相机的最新情况
DOI：
10.1117/12.2314489
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发表时间：
2018
期刊：
影响因子：
1.9
通讯作者：
M. Todorovic
中科院分区：
文献类型：
--
作者：
M. Downing;P. Amico;M. Brinkmann;M. Casali;R. Conzelmann;Christoph Geimer;E. Marchetti;I. Molina;L. Mehrgan;J. Reyes;M. Seidel;J. Stegmeier;M. Todorovic
用于20米以上级别光学望远镜的下一代仪器的成功将取决于通过利用复杂的自适应光学(AO)系统来提高图像质量。几年来，ESO一直非常积极地为ELT的望远镜和仪器的AO系统收集需求、规划和开发探测器和控制器/照相机。从这些要求中，已经确定了对三种不同类型相机的需求：1)爱丽丝(小型可见光相机)，用于真理/高阶自然导星/望远镜导引，使用24μm像素的240x240像素的Teledyne-e2v CCD220-DD；2)Lisa(大型可视相机)，用于夏克-哈特曼激光导星/望远镜波前传感，使用24μm像素的800x800的Teledyne-e2v LVSM；3)Sphira独立相机，用于低/高阶NGS WFS/FINE中心，使用24μm像素的莱昂纳多·萨菲拉320x256。本文介绍了这些摄像机及其探测器的最新发展。对于Alice和Lisa，遵循单一的摄像头设计方法，唯一的区别是可定制的前端，以支持不同类型的探测器。爱丽丝和丽莎是围绕一组共同的组件建造的，从外部看起来基本上是一样的。尽可能和实际地使用COTS模块，以减少开发工作和时间，并提高功能和可维护性。将对设计方法、常见组件和探测器专用前端进行描述。LISA相机探测器LVSM正在由Teledyne-e2v公司开发。将简要介绍这一进展的最新情况。对于萨菲拉独立相机来说，采用了与爱丽丝和丽莎不同的方法。C-RED One摄像机是从FLI采购的，ESO将对其进行修改，以符合ELT标准：与实时计算机(RTC)和NGC控制计算机的10GbE接口，以及精确时间协议(PTP)。PTP是ELT的时间基准系统，摄像机将使用它来安排帧和时间戳，并用于与其他摄像机或硬件设备同步。
The success of the next generation of instruments for 20m plus class optical telescopes will depend upon improving the image quality by exploiting sophisticated Adaptive Optics (AO) systems. For several years now, ESO has been very active in gathering requirements, planning, and developing detectors and controllers/cameras for the AO systems of the telescope and instruments of the ELT. From these requirements, the need for three different types of cameras have been identified: 1) ALICE (smALl vIsible CamEra) for Truth/High Order Natural Guide Star (NGS)/Telescope Guiding which uses the “sub-electron RON” Teledyne-e2v CCD220-DD of 240x240 of 24μm pixels; 2) LISA (Large vISble cAmera) for Shack-Hartmann Laser Guide Star (LGS)/Telescope Wavefront Sensing (WFS) which uses the Teledyne-e2v LVSM of 800x800 of 24μm pixels; 3) SAPHIRA Standalone Camera for Low-/High-Order NGS WFS/Fine Centering which uses the Leonardo SAPHIRA of 320x256 of 24μm pixels. This paper provides an update on the development of these cameras and their detectors. For ALICE and LISA, a single camera design approach is being followed with the only difference being the customizable front-ends to support the different type of detector. ALICE and LISA are being built around a common set of components and will look essentially identical from the exterior. COTS modules are being used wherever possible and practical to reduce the development effort and time, and improve functionality and maintainability. A description of the design approach, the common components and the detector specific front-ends will be presented. The LISA camera detector, the LVSM, is under development by Teledyne-e2v. A brief update on the progress of this development will be provided. For the SAPHIRA standalone camera, a different approach is being followed to that of ALICE and LISA. C-RED ONE cameras are being procured from FLI and will be modified by ESO to comply with ELT standards: 10GbE interfaces to the Real Time Computer (RTC) and NGC control computer, and Precision Time Protocol (PTP). PTP is the time reference system of the ELT and will be used by the cameras to schedule and time stamp frames and for synchronizing with other cameras or hardware devices.