Astronomical polarimeter with 2-D detector arrays.
Astronomical polarimeter with 2-D detector arrays.
复制标题
带有二维探测器阵列的天文旋光计。
DOI：
10.1364/ao.24.003893
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发表时间：
1985
期刊：
影响因子：
1.9
通讯作者：
Hanspeter Povel
中科院分区：
文献类型：
--
作者：
J. O. Stenflo;Hanspeter Povel
它显示了如何快速（50-100 kHz）的全Stokes矢量的压电弹性调制可以与具有长积分时间的大型ccd型探测器阵列结合使用。该技术是使用光学解调系统（取代相应的单通道检测器系统中的锁定放大器）。这使得CCD探测器可以与积分时间和读出率在普通光度法中使用。在系统中加入一个光学相位开关，可以从记录的偏振图像中消除大的像素到像素灵敏度变化的影响。抑制大气噪声的分束器可以直接安装在探测器的前面，而不是作为偏振分析仪的一部分。
It is shown how fast (50–100 kHz) piezoelastic modulation of the full Stokes vector can be used in combination with large CCD-type detector arrays with long integration times. The technique is to use an optical demodulation system (replacing the lockin amplifiers in corresponding single-channel detector systems). This allows the CCD detectors to be used with integration times and readout rates as in ordinary photometry. Including an optical phase switch in the system, the effect of the large pixel-to-pixel sensitivity variations can be removed from the recorded polarization images. The beam splitter that suppresses atmospheric noise can be located immediately before the detectors instead of being part of the polarization analyzer.