Development of Silicon Immersion Grating Technology for Ground-based Infrared Astronomical Spectroscopy

地基红外天文光谱硅浸入式光栅技术的发展

• 批准号: 0138235
• 负责人: Jian Ge
• 金额: $ 60.4万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0138235&HistoricalAwards=false
• 关键词: Development; Silicon; Immersion; Grating; Technology

AST-0138235Ge, JianSilicon immersion gratings for astronomical applications in the infrared for wavelengths between 1 and 10-microns will be developed for telescope projects requiring spectral resolutions between 1,000 and 100,000. Immersing the grating in Silicon, which as an index of refraction of 3.4 in the infrared will enable much higher solid-angle throughput or etendu than is now possible for an instrument of smaller volume and mass. Spectrographs used on telescopes must be moved during the observations; either swinging through the sky at a Cassegrain or equivalent focus or rotating at a Nysmyth platform (to compensate for rotating field during exposure). Large heavy instruments present serious engineering challenges for cryogenic operation. Use of silicon immersion gratings will enable lighter-weight higher-performance instruments for cutting edge scientific research. The first astronomical observations will be on the Lick 3-meter telescope.***

AST-0138235 Ge，JianSilicon浸没式光栅，用于波长在1至10微米之间的红外天文应用，将开发用于光谱分辨率在1，000至100，000之间的望远镜项目。 将光栅浸入硅中，硅在红外线中的折射率为3.4，这将使立体角吞吐量或光学扩展量比现在体积和质量较小的仪器更高。 望远镜上使用的摄谱仪在观测期间必须移动;要么在卡塞格伦或等效焦点上在天空中摆动，要么在Nysmyth平台上旋转（以补偿曝光期间的旋转场）。 大型重型仪器对低温操作提出了严峻的工程挑战。硅浸没光栅的使用将使重量更轻，性能更高的仪器用于尖端科学研究。第一次天文观测将在利克3米望远镜上进行。