High-resolution visible imaging with piezoelectric deformable secondary mirror: experimental results at the 1.8-m adaptive telescope

IF 15.3 1区 物理与天体物理 Q1 OPTICS
Youming Guo, Kele Chen, Jiahui Zhou, Zhengdai Li, Wenyu Han, Xuejun Rao, Hua Bao, Jinsheng Yang, Xinlong Fan, Changhui Rao
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引用次数: 0

Abstract

Integrating deformable mirrors within the optical train of an adaptive telescope was one of the major innovations in astronomical observation technology, distinguished by its high optical throughput, reduced optical surfaces, and the incorporation of the deformable mirror. Typically, voice-coil actuators are used, which require additional position sensors, internal control electronics, and cooling systems, leading to a very complex structure. Piezoelectric deformable secondary mirror technologies were proposed to overcome these problems. Recently, a high-order piezoelectric deformable secondary mirror has been developed and installed on the 1.8-m telescope at Lijiang Observatory in China to make it an adaptive telescope. The system consists of a 241-actuator piezoelectric deformable secondary mirror, a 192-sub-aperture Shack-Hartmann wavefront sensor, and a multi-core-based real-time controller. The actuator spacing of the PDSM measures 19.3 mm, equivalent to approximately 12.6 cm when mapped onto the primary mirror, significantly less than the voice-coil-based adaptive telescopes such as LBT, Magellan and VLT. As a result, stellar images with Strehl ratios above 0.49 in the R band have been obtained. To our knowledge, these are the highest R band images captured by an adaptive telescope with deformable secondary mirrors. Here, we report the system description and on-sky performance of this adaptive telescope.
压电变形副镜高分辨率可见光成像:1.8 m自适应望远镜实验结果
在自适应望远镜光学序列中集成可变形镜是天文观测技术的重大创新之一,其特点是光学吞吐量高、光学面小、可变形镜集成。通常使用音圈致动器,这需要额外的位置传感器、内部控制电子设备和冷却系统,导致结构非常复杂。为了克服这些问题,提出了压电变形二次镜技术。近日,中国丽江天文台1.8米望远镜研制并安装了一种高阶压电变形二次镜,使其成为一种自适应望远镜。该系统由一个具有241个致动器的压电变形副镜、一个192个子孔径的Shack-Hartmann波前传感器和一个多核实时控制器组成。PDSM的致动器间距为19.3 mm,在映射到主镜上时相当于约12.6 cm,明显小于基于语音线圈的自适应望远镜,如LBT,麦哲伦和VLT。得到了R波段Strehl比值大于0.49的恒星图像。据我们所知,这些是由带有可变形副镜的自适应望远镜捕捉到的最高R波段图像。本文报道了该自适应望远镜的系统描述和星上性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
19.30
自引率
7.10%
发文量
128
期刊介绍: Opto-Electronic Advances (OEA) is a distinguished scientific journal that has made significant strides since its inception in March 2018. Here's a collated summary of its key features and accomplishments: Impact Factor and Ranking: OEA boasts an impressive Impact Factor of 14.1, which positions it within the Q1 quartiles of the Optics category. This high ranking indicates that the journal is among the top 25% of its field in terms of citation impact. Open Access and Peer Review: As an open access journal, OEA ensures that research findings are freely available to the global scientific community, promoting wider dissemination and collaboration. It upholds rigorous academic standards through a peer review process, ensuring the quality and integrity of the published research. Database Indexing: OEA's content is indexed in several prestigious databases, including the Science Citation Index (SCI), Engineering Index (EI), Scopus, Chemical Abstracts (CA), and the Index to Chinese Periodical Articles (ICI). This broad indexing facilitates easy access to the journal's articles by researchers worldwide.
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