Abstract
We present a practical wide-field optical design for a 60 m aperture submillimeter telescope, which is currently under conceptual design study in China. The telescope is specified to operate over a wavelength range of 0.65–3 mm and provide a wide field of view (FOV) of 1° in diameter. We designed an F/6 Ritchey Chrétien (RC) system with a quasi-planar tertiary corrector, which cancels all spherical, coma, and astigmatism aberrations. It also achieves a good balance among the mirror sizes, central obscuration, and focal-plane curvature. The problems of focal surface curvature and nontelecentricity are treated in the subfield instrumental design, which employs a simple silicon wedge prism to obtain flat and telecentric focal planes for each subfield instrument module. Our studies show that by such a design, more than ${{10}^5}$ detector pixels can be efficiently and uniformly fed at the shortest wavelength band with Strehl ratios above 0.85 across the entire 1° FOV. Several practical issues related to the telescope optics are also discussed.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Shaul Hanany and Daniel P. Marrone
Appl. Opt. 41(22) 4666-4670 (2002)
Mehdi Bahrami and Alexander V. Goncharov
Appl. Opt. 49(30) 5705-5712 (2010)
Chao Wang, Hao-dong Shi, Zhuang Liu, Qiang Fu, Su Zhang, Jun-tong Zhan, Ying-chao Li, Lun Jiang, and Peng Zhang
Appl. Opt. 59(26) 7883-7892 (2020)