• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Advancements in Adaptive Optics pt.3 >Performance of PYRAMIR detector System
【24h】

Performance of PYRAMIR detector System

机译：PYRAMIR探测器系统的性能

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present in this paper the results of laboratory tests on the detector system for PYRAMIR, the infrared wavefront sensor for ALFA, the Adaptive Optics system at Calar Alto Observatory. PYRAMIR will use, at least in a first phase, a Hawaii-Ⅰ detector, with 4 512x512 pixels~2 quadrants which are read-out in parallel on 4 independent output channels. Since wavefront sensing in the infrared requires high frame rates and since the signal of the pyramid wavefront sensor is distributed on a small fraction of the detector area, the detector is operated in a windowed mode. Setting the pixel clock to the fastest speed supported by the chip without a significant increase in read noise and by addressing a 64x64 window, for instance, we are able to reach frame rates in excess of 150 Hz. We show our measurements of total read noise obtained at this relatively high read-out speed, as well as the results of our tests concerning linearity and sensitivity. The results show that the noise introduced by the read-out electronics itself is negligible compared with the intrinsic read-noise of the detector. In order to maximize the read-out efficiency we use differential measurements on a sequence of non destructive read-outs. We discuss the main characteristics of the detector when operating in this mode.
机译：我们在本文中介绍了PYRAMIR探测器系统，ALFA红外波前传感器，Calar Alto天文台的自适应光学系统的实验室测试结果。 PYRAMIR至少在第一阶段将使用Hawaii-Ⅰ检测器，该检测器具有4 512x512像素〜2个象限，可在4个独立的输出通道上并行读取。由于红外中的波前感测需要高帧频，并且由于金字塔波前传感器的信号分布在检测器区域的一小部分，因此检测器以窗口模式运行。例如，将像素时钟设置为芯片支持的最快速度，而不会显着增加读取噪声，并且通过寻址64x64窗口，我们能够达到超过150 Hz的帧速率。我们展示了在相对较高的读出速度下获得的总读取噪声的测量结果，以及有关线性和灵敏度的测试结果。结果表明，与检测器的固有读取噪声相比，读出电子设备本身引入的噪声可以忽略不计。为了最大化读出效率，我们对一系列非破坏性读出使用差分测量。我们讨论了在此模式下运行时检测器的主要特性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号