Ground-Based High Resolution Imaging in the Visible: The Cambridge Lucky Aperture Synthesis Instrument

可见光中的地基高分辨率成像：剑桥幸运孔径合成仪器

• 批准号: ST/F00379X/1
• 负责人: Craig Mackay
• 金额: $ 65.21万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FF00379X%2F1
• 关键词: Ground; Based; Resolution; Imaging; Visible

The Hubble Space Telescope has produced astonishing pictures for many years but it will only survive for a few more years at most. Already astronomers are striving to achieve high resolution on the ground but the methods being used such as adaptive optics and laser guide stars are still a long way from being able to deliver good image quality in the visible. The Cambridge Lucky Aperture Synthesis Instrument (CLASI) uses a combination of proven technologies to deliver the highest resolution images that the telescope would be capable of producing if it was above the atmosphere. Usually fluctuations in the atmosphere substantially degrade ground-based images. In this instrument we break up the aperture of the telescope into many sub apertures and then recombine them in a carefully controlled way that lets us check the quality of the images tens of times per second. By selecting those images which are truly of the best quality we can synthesise a telescope in the computer that gives the highest quality image possible using methods already widely used by radio astronomers. This instrument is designed to give a resolution three times better than that of the Hubble Space Telescope, on the ground and a moderate cost. There are still many things that a space telescope will be able to do better than one on the ground but until new space projects are started this is likely to be the only way we can observe the most distant parts of the universe efficiently and with the best image quality.

哈勃太空望远镜多年来一直在拍摄令人惊叹的照片，但它最多只能再存活几年。天文学家已经在努力实现地面上的高分辨率，但目前使用的自适应光学和激光导星等方法距离能够在可见光下提供良好的图像质量还有很长的路要走。剑桥幸运孔径合成仪器(Clasi)结合了成熟的技术，提供了望远镜在大气层上空时能够产生的最高分辨率图像。通常，大气中的波动会大大降低地面图像的质量。在这台仪器中，我们将望远镜的孔径分解成许多子孔径，然后以一种仔细控制的方式重新组合，使我们能够每秒数十次地检查图像的质量。通过选择那些真正质量最好的图像，我们可以利用射电天文学家已经广泛使用的方法，在计算机中合成出尽可能提供最高质量图像的望远镜。这台仪器的设计分辨率是地面哈勃太空望远镜的三倍，成本适中。太空望远镜仍有许多东西可以比地面望远镜做得更好，但在新的太空项目开始之前，这可能是我们能够有效地观察宇宙最遥远部分并具有最佳图像质量的唯一方法。

项目成果

High-resolution imaging with large ground-based telescopes

使用大型地面望远镜进行高分辨率成像

• DOI: 10.1117/2.1201403.005408
• 发表时间: 2014
• 期刊: SPIE Newsroom
• 作者: Mackay C

Wavefront phase retrieval with non-linear curvature sensors

使用非线性曲率传感器进行波前相位检索

• DOI: 10.1093/mnras/sts472
• 发表时间: 2013
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Aisher P

Perspective for optical high-angular resolution follow-up studies of X-raying AGNs

X射线活动星系核光学高角分辨率后续研究的展望

• DOI: 10.48550/arxiv.1403.1744
• 发表时间: 2014
• 期刊: arXiv e-prints
• 作者: Labadie Lucas

High-resolution imaging and spectroscopy in the visible from large ground-based telescopes with natural guide stars

具有自然导星的大型地面望远镜在可见光中的高分辨率成像和光谱

• DOI: 10.1117/12.855281
• 发表时间: 2010
• 作者: Mackay C

Lucky imaging and speckle discrimination for the detection of faint companions with adaptive optics

利用自适应光学器件检测微弱伴星的幸运成像和散斑辨别

• DOI: 10.1117/12.788442
• 发表时间: 2008
• 作者: Gladysz S