The LSST camera overview
The LSST camera overview
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LSST 相机概述
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
R. Schindler
中科院分区：
文献类型：
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作者：
K. Gilmore;S. Kahn;M. Nordby;D. Burke;P. O'connor;J. Oliver;V. Radeka;T. Schalk;R. Schindler
LSST相机是一种广域光学(0.35-1um)成像器，旨在提供3.5度视野和优于0.2角秒的采样。探测器的格式将是圆形马赛克，每幅图像提供大约3.2千兆像素。该相机包括滤镜机构和快门功能。它位于望远镜的中间，横截面面积受到光学晕动的限制，必须控制散热，以限制光束中的温度梯度。快速的f/1.2波束将需要焦面机械组件上的严格公差。焦平面阵列在大约-100℃的温度下工作，以实现所需的探测器性能。焦平面阵列包含在真空低温恒温器中，该低温恒温器结合了探测器前端电子设备和热控制。低温恒温器透镜用作低温恒温器的入口窗口和真空密封。类似地，相机主体镜头用作相机外壳的入口窗口和气封，其中填充了合适的气体，为快门和滤镜更换机构提供操作环境。过滤器传送带可容纳5个过滤器，每个过滤器的直径为75厘米，无需外部干预即可快速交换。
The LSST camera is a wide-field optical (0.35-1um) imager designed to provide a 3.5 degree FOV with better than 0.2 arcsecond sampling. The detector format will be a circular mosaic providing approximately 3.2 Gigapixels per image. The camera includes a filter mechanism and, shuttering capability. It is positioned in the middle of the telescope where cross-sectional area is constrained by optical vignetting and heat dissipation must be controlled to limit thermal gradients in the optical beam. The fast, f/1.2 beam will require tight tolerances on the focal plane mechanical assembly. The focal plane array operates at a temperature of approximately -100 C to achieve desired detector performance. The focal plane array is contained within an evacuated cryostat, which incorporates detector front-end electronics and thermal control. The cryostat lens serves as an entrance window and vacuum seal for the cryostat. Similarly, the camera body lens serves as an entrance window and gas seal for the camera housing, which is filled with a suitable gas to provide the operating environment for the shutter and filter change mechanisms. The filter carousel can accommodate 5 filters, each 75 cm in diameter, for rapid exchange without external intervention.