The optical design of the six-meter CCAT-prime and Simons Observatory telescopes
The optical design of the six-meter CCAT-prime and Simons Observatory telescopes
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六米 CCAT 定焦望远镜和西蒙斯天文台望远镜的光学设计
DOI：
10.1117/12.2314073
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
他15名
中科院分区：
文献类型：
--
作者：
Stephen C Parshley;他15名
CCAT天文台的CCAT主望远镜和Simons天文台的大口径望远镜采用了一种通用的彗差校正6米口径十字形龙式望远镜光学设计。两者都将建在智利高海拔的阿塔卡马沙漠，分别用于亚毫米和毫米波长的观测。该设计提供了高吞吐量，相对平坦的焦平面，在3毫米波长下的视场直径为7.8度，并且能够在< 1毫米波长下照亮>100k衍射受限光束。该光学元件由偏移反射的主、次表面组成，其排列方式满足Mizuguchi-Dragone准则，抑制一阶像散并保持高偏振纯度。为了纠正彗差，表面形状被从标准的圆锥形状中扰动。我们讨论了光学设计、性能和容差灵敏度。更多关于CCAT-prime的信息可以在ccatobservatory.org和simmonsoobservatory.org上找到。
A common optical design for a coma-corrected, 6-meter aperture, crossed-Dragone telescope has been adopted for the CCAT-prime telescope of CCAT Observatory, Inc., and for the Large Aperture Telescope of the Simons Observatory. Both are to be built in the high altitude Atacama Desert in Chile for submillimeter and millimeter wavelength observations, respectively. The design delivers a high throughput, relatively flat focal plane, with a field of view 7.8 degrees in diameter for 3 mm wavelengths, and the ability to illuminate >100k diffraction-limited beams for < 1 mm wavelengths. The optics consist of offset reflecting primary and secondary surfaces arranged in such a way as to satisfy the Mizuguchi-Dragone criterion, suppressing first-order astigmatism and maintaining high polarization purity. The surface shapes are perturbed from their standard conic forms in order to correct coma aberrations. We discuss the optical design, performance, and tolerancing sensitivity. More information about CCAT-prime can be found at ccatobservatory.org and about Simons Observatory at simonsobservatory.org.