Focal plane wavefront sensing and control for ground-based imaging
Focal plane wavefront sensing and control for ground-based imaging
复制标题
用于地面成像的焦平面波前传感和控制
DOI：
10.1117/12.926353
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Hartung
中科院分区：
文献类型：
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作者：
D. Savransky;B. Macintosh;Sandrine Thomas;L. Poyneer;D. Palmer;R. D. de Rosa;M. Hartung
我们评估了现有波前传感和控制技术的性能，包括散斑消除和电场共轭，并讨论了它们在高对比度成像光谱仪（例如双子座行星成像仪（GPI））中的适用性。这些技术对于校正系统相位误差非常有用，并且可以通过与专用自适应光学 (AO) 波前传感器结合使用来潜在地提高仪器操作效率。我们讨论了 GPI 散斑抑制实施的细节，并进行了实验室演示，平均对比度从 5.7x10-6 提高到 1.03x10-6。
We evaluate the performance of existing wavefront sensing and control techniques, including speckle nulling and electric field conjugation, and discuss their applicability to high-contrast imaging spectrographs such as the Gemini Planet Imager (GPI). These techniques can be highly useful in correcting system phase errors, and can potentially improve instrument operating efficiency by working in conjunction with the dedicated adaptive optics (AO) wavefront sensor. We discuss the specifics of our implementation of speckle suppression for GPI and present lab demonstrations with average contrast improvements from 5.7x10-6 to 1.03x10-6.