BA4-90/150接收机的光学系统与宽带增透涂层

Optics and broadband anti-reflection coatings for the BA4-90/150 receiver

A. R. Polish, P. A. R. Ade, Z. Ahmed, M. Amiri, D. Barkats, R. Basu Thakur, C. A. Bischoff, D. Beck, J. J. Bock, V. Buza, B. Cantrall, J. R. Cheshire, J. Connors, J. Cornelison, M. Crumrine, A. J. Cukierman, E. Denison, L. Duband, M. A. Echter, M. Eiben, B. D. Elwood, S. Fatigoni, J. P. Filippini, A. Fortes, M. Gao, C. Giannakopoulos, N. Goeckner-Wald, D. C. Goldfinger, S. Gratton, J. A. Grayson, A. Greathouse, P. K. Grimes, M. Halpern, S. Henderson, T. D. Hoang, J. Hubmayr, H. Hui, K. D. Irwin, M. Izquierdo Poza, J. H. Kang, K. S. Karkare, S. Kefeli, J. M. Kovac, C. Kuo, K. Lasko, K. Lau, M. Lautzenhiser, T. Liu, S. C. Mackey, N. Maher, K. G. Megerian, L. Minutolo, L. Moncelsi, Y. Nakato, H. T. Nguyen, R. O'Brient, S. N. Paine, A. Patel, M. A. Petroff, T. Prouve, C. Pryke, C. D. Reintsema, P. J. Rioles, T. Romand, M. Salatino, A. Schillaci, B. Schmitt, B. Singari, A. Soliman, T. St. Germaine, A. Steiger, B. Steinbach, R. Sudiwala, K. L. Thompson, C. Tucker, A. D. Turner, C. Vergès, A. G. Vieregg, A. Wandui, A. C. Weber, J. Willmert, W. L. K. Wu, H. Yang, C. Yu, L. Zeng, C. Zhang, S. Zhang

arXiv 2608.25014首次发表：2026-08-27更新：2026-08-27

AI 中文总结

该研究针对BA4-90/150接收机的宽频需求，研发适配HMPE窗口等部件的改进型增透涂层，升级光学链路以降低损耗，旨在打造低系统误差的小孔径天文仪器用于搜寻原初B模式偏振信号。

AI 中文摘要

BICEP阵列望远镜旨在搜寻来自暴胀引力波的原初B模式偏振信号，该信号极为微弱，要求极高的测绘深度与系统误差控制。新型BA4-90/150接收机引入了80-169GHz的宽频双色带，需对整个光学链路进行升级以降低损耗、反射与热负载。我们为HMPE窗口、HDPE透镜及尼龙红外滤光片研发了改进型增透（AR）涂层，将AR技术的带宽扩展至超过一个倍频程。热滤波方案及若干机械元件也已更新，以进一步抑制光学损耗、反射与光束截断。我们计划依托已部署的BICEP阵列（BA）望远镜的成功经验，打造一款新型小孔径仪器，实现迄今最低的光学系统误差。

英文摘要

The BICEP Array telescopes search for primordial B-mode polarization from inflationary gravitational waves. This signal is exceedingly faint, demanding excellent map depth and systematics control. The new BA4-90/150 receiver introduces a wide 80-169GHz dichroic band, requiring upgrades throughout the optics chain to reduce loss, reflections, and thermal loading. We developed improved anti-reflection (AR) coatings for our HMPE window, HDPE lenses, and nylon infrared filter, extending our AR technology to span more than an octave of bandwidth. The thermal filtering scheme and several mechanical elements were also updated to further suppress optical loss, reflections, and beam truncation. We aim to build on the proven success of deployed BICEP Array (BA) telescopes to produce a new small aperture instrument with the lowest optical systematics to date.

Comments10 pages, 9 figures, submitted to Proc. SPIE

论文原文

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