Development of Cryogenic Far-Infrared Fourier Transform Spectrometer with High Spectral Resolution

高光谱分辨率低温远红外傅里叶变换光谱仪的研制

• 批准号: 11640233
• 负责人: KAWADA Mitsunobu
• 金额: $ 2.43万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640233/
• 关键词: Far-Infrared Radiation; Fourier Transform Spectrometer; Infrared Astronomy; Spectroscopy; 赤外線

Far-Infrared Fourier transform spectrometer should be operated at cryogenic temperature to avoid the thermal emission from itself. And the best way for far-infrared astronomy is the observation in space where is free from the atmospheric absorptions and emissions. The goal of this research is to develop the Fourier transform spectrometer with high spectral resolution under these unusual conditions.Since Fourier transform spectrometer is based on two beams interferometer, the precise displacement sensor is required to refer optical path difference. The displacement sensor for far-infrared Fourier transform spectrometer should be worked at cryogenic temperature. For example, required specification of a displacement sensor is 40 mm total displacement with a few micrometers accuracy. To achieve this requirement we adopt the optical scale with interferential scanning head. The commercial grade of this type of scale, of course, does not work under cryogenic temperature. We modify the part of the sensor head module and replace the sensor chips with cryogenic parts. Finally, we have developed the cryogenic displacement sensor for 40 mm displacement with 1 micrometer accuracy.We can take interferograms using our Fourier transform spectrometer with this displacement sensor at cryogenic temperature. The fundamental techniques to construct the cryogenic far-infrared Fourier transform spectrometer are established through this research.

远红外傅里叶变换光谱仪应在低温下工作，以避免自身的热发射。而远红外天文学最好的方法就是在没有大气吸收和排放的太空中进行观测。由于傅里叶变换光谱仪是基于双光束干涉仪，需要精密的位移传感器来测量光程差，因此本研究的目的是研制在这种特殊情况下具有高光谱分辨率的傅里叶变换光谱仪。远红外傅里叶变换光谱仪的位移传感器应工作在低温下。例如，位移传感器的要求规格是总位移量为40毫米，精度为几微米。为了达到这一要求，我们采用了带有干涉扫描头的光学标尺。当然，这种类型的商用鳞片在低温下是不能工作的。我们对传感头模块的部分进行了修改，并将传感器芯片更换为低温部件。最后，我们研制出了40 mm位移的低温位移传感器，其精度为1微米，可以在低温下用我们的傅里叶变换光谱仪拍摄干涉图。通过本研究，确定了构建低温远红外傅里叶变换光谱仪的基本技术。

项目成果

Kawada, M.: "FIS-Far-Infrared Surveyor onboard the ASTRO-F"The Institute of Space and Astronoutical Science Report. SP No.14. 273-280 (2000)

Kawada, M.：“ASTRO-F 上的 FIS-远红外测量员”空间与天文科学研究所报告。

Takahashi, H., Shibai, H., Kawada, M,, Hirao, T., Watabe, T., Tsuduku, Y., Nagata, H., Utsuno, H., Hibi, Y., Hirooka, S., Nakagawa, T., Kaneda, H., Matsuura, S., Kii, T., Makiuti, S., Okamura, Y., Doi, Y., Matsuo, H., Hiromoto, N., Fujiwara, M., Noda, M.:

高桥 H.、芝白 H.、川田 M、平尾 T.、渡部 T.、津都 Y.、永田 H.、宇津野 H.、日比 Y.、广冈 S.、

M.Kawada: "FIS-Far-Infrared Surveyor on board the ASTRO-F"Mid- and Far-Infrared Astronomy and Future Space Missions. ISAS Report SP-14. 273-280 (2000)

M.Kawada：“ASTRO-F 上的 FIS-远红外测量员”中远红外天文学和未来太空任务。