论文标题
用波长扫和Zernike相对比传感器测量分段镜的cophasing状态
Measuring the cophasing state of a segmented mirror with a wavelength sweep and a Zernike phase contrast sensor
论文作者
论文摘要
对高分辨率望远镜的需求导致分段的主要镜子，需要分阶段进行操作。应用波长扫描技术的相位传感器可提供较大的捕获范围，而无需调节各个镜像段的位置。该技术提供了与科学观测并平行监测分段望远镜的分阶段状态的潜力。我们使用Zernike相位造影剂传感器来评估波长扫描技术的性能。专用台上的测试结果显示112 nm RMS精度。在模拟的帮助下，我们解释了该方法的已知错误，并建议改进方法。
The demand for higher resolution telescopes leads to segmented primary mirrors which need to be phased for operation. A phasing sensor applying a wavelength sweep technique provides a large capture range without modulating the position of individual mirror segments. This technique offers the potential to monitor the phasing state of a segmented telescope in parallel to the science observations. We evaluate the performance of the wavelength sweep technique using a Zernike phase contrast sensor for coarse phasing. Tests results on a dedicated bench show 112 nm rms precision. With the help of a simulation, we explain a known error of the method and we suggest ways for improvements.
