用于 CMB-S4 的自由曲面三镜方位大口径望远镜和接收器光学系统

IF 1.7 4区 工程技术 Q3 OPTICS Applied optics Pub Date : 2024-01-03 DOI:10.1364/ao.501744
Patricio A. Gallardo, Roberto Puddu, K. Harrington, Bradford Benson, J. Carlstrom, S. Dicker, Nick Emerson, Jon E. Gudmundsson, M. Limon, Jeff McMahon, J. Nagy, T. Natoli, M. Niemack, Stephen Padin, John Ruhl, Sara M. Simon, the CMB-S4 Collaboration
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引用次数: 2

摘要

CMB-S4 是下一代地基宇宙微波背景(CMB)观测站,它将提供毫米波长的 CMB 详细地图,从而极大地推动我们对宇宙起源和演化的了解。CMB-S4 将部署配备数十万个探测器的大口径和小口径望远镜,在毫米波长上以角分和度的分辨率观测 CMB。弧分分辨率的深度脱胶勘测能够在毫米波长下观测到大视场,这对膨胀科学大有裨益。这种巡天观测可以作为度角分辨率巡天观测的补充。脱镜巡天要求每个频段的照相机在整个焦平面上几乎均匀分布。我们提出了一种大吞吐量(9.4°视场)、大孔径(5 米直径)自由曲面三镜式偏心望远镜和由 85 台照相机组成的阵列,用于弧分分辨率的 CMB 观测,满足了 CMB-S4 脱镜巡天的需要。提供了这台三镜望远镜和照相机的详细说明,并通过一系列数值计算说明了预期的光学性能和机械公差。
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Freeform three-mirror anastigmatic large-aperture telescope and receiver optics for CMB-S4
CMB-S4, the next-generation ground-based cosmic microwave background (CMB) observatory, will provide detailed maps of the CMB at millimeter wavelengths to dramatically advance our understanding of the origin and evolution of the universe. CMB-S4 will deploy large- and small-aperture telescopes with hundreds of thousands of detectors to observe the CMB at arcminute and degree resolutions at millimeter wavelengths. Inflationary science benefits from a deep delensing survey at arcminute resolutions capable of observing a large field of view at millimeter wavelengths. This kind of survey acts as a complement to a degree angular resolution survey. The delensing survey requires a nearly uniform distribution of cameras per frequency band across the focal plane. We present a large-throughput (9.4° field of view), large-aperture (5-m diameter) freeform three-mirror anastigmatic telescope and an array of 85 cameras for CMB observations at arcminute resolutions, which meets the needs of the delensing survey of CMB-S4. A detailed prescription of this three-mirror telescope and cameras is provided, with a series of numerical calculations that indicates expected optical performance and mechanical tolerance.
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来源期刊
Applied optics
Applied optics OPTICS-
CiteScore
3.70
自引率
15.80%
发文量
2081
审稿时长
3 months
期刊介绍: A highly regarded, premium quality must read for everyone in the optics field that offers applications-centered research in optics, photonics, imaging, and sensing. Topics germane to the journal include optical technology, lasers, photonics, environmental optics, and information processing.
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