Infrared Optics Design for the Japan National Large Telescope Project

日本国家大型望远镜项目的红外光学设计

• 批准号: 04044201
• 负责人: KODAIRA Keiichi
• 金额: --
• 依托单位: National Astronomical Observatory
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Survey.
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04044201/
• 关键词: Large Telescope; Infrared Optics; Mauna Kea Observatory; Chopping Secondary Mirror

National Astronomical Observatory of Japan (NAOJ) is constructing an 8m reflector at the summit of Mauna Kea in Hawaii which is known to be most suitable site for infrared observation. Dr. Nariai stayed in Hawaii and collaborated with staff members of University of Hawaii and of Mauna Kea Observatories in evaluating infrared data of existing telescopes and Mauna Kea sky, and in designing optical systems for the Japan National Large Telescope (JNLT).The design work resulted in an F/12.2 and a chopping F/35 IR mirror system, for the latter of which active deformation of the main mirror was introduced in order to secure defraction-limit resolution of direct images in mid-IR (-0."2) using quickly developing 2-D array detectors.A wide-field corrector for IR observation at the primary focus was also designed by adopting new glass material for the first time.In order to minimize the instrumental thermal noise background, various devices were recommended, but some crucial issues, such as depletion of radiation from structures supporting the secondary and the tertiary mirrors, remained to be investigated in follow-on tasks.

日本国家天文台（NAOJ）正在夏威夷莫纳克亚山顶建造一个8米高的反射器，那里被认为是最适合进行红外观测的地点。成井博士留在夏威夷，与夏威夷大学和莫纳克亚山天文台的工作人员合作，评估现有望远镜和莫纳克亚山天空的红外数据，并为日本国家大型望远镜（JNLT）设计光学系统。设计工作产生了F/12.2和截断F/35红外反射镜系统，其中后者引入了主反射镜的主动变形，以便使用快速开发的二维阵列探测器在中红外（-0. 2）中确保直接图像的偏转限制分辨率。首次采用新型玻璃材料设计了用于主焦红外观测的宽视场校正器。为了最小化仪器热噪声背景，推荐了各种设备，但一些关键问题，如支持二次和三级镜的结构的辐射损耗，仍有待在后续任务中研究。

项目成果

小平桂一: "Near-Infrared Imaging of Markarian 231" Publications of Astronomical Society of Japan. 44. L246-L251 (1993)

Keiichi Kodaira：“Markarian 231 的近红外成像”，日本天文学会出版物 44. L246-L251 (1993)。

Keiichi Kodaira: "Near-Infrared Imaging of Markarian 231" Publications of the Astronomical Society of Japan. 44. L246-L251 (1993)

Keiichi Kodaira：“Markarian 231 的近红外成像”，日本天文学会出版物。