Multi-object imaging spectroscopy with a multi-scan Fabry-Perot

这项研究表明，一台10多个不同波长范围的多扫描法布里-珀罗成像光谱仪可以用于天文观测。我们使用液晶标准具作为Fabry Perot的基本部件，而带有机械驱动的标准具在天文学中更受欢迎。与机械标准具相比，液晶标准具更稳定，特别是对温度变化和机械振动的影响。液晶标准具也很便宜。我们使用自己的评估仪器对标准具进行了评估，结果表明，我们的宽波长覆盖标准具具有12或更大的精确度，符合我们的技术指标，而标准具的透明度不是很高。我们还证实，标准具易于维护。透明度小的原因是我们只用了一个标准具来覆盖我们打算用两个标准具覆盖的波长范围。这主要是因为我们的预算有限。由于标准具的波长覆盖范围变大，很难使涂层在波长范围内具有恒定的反射率。但标准具足够有用，可以尝试制造多扫描法蒂-珀罗成像光谱仪。我们改装了一台二色镜相机，这样我们就可以将它与标准具一起使用。为了进行真正的天文观测，我们需要窄带滤光片。但过滤器的选择可以针对每个科学课题进行，我们可以在未来进行。

This research is to show that a multi-scanning Fabry-Perot imaging spectrograph for more than 10 different wavelength ranges can be used for astronomical observations. We used a liquid crystal etalon for the basic part of the Fabry Perot, while etalons with mechanical drives are more popular in astronomy. A liquid crystal etalon is more stable compared with a mechanical one especially against temperature variation and mechanical vibrations. A liquid crystal etalon is also inexpensive. We evaluated an etalon with our own evaluation apparatus, and showed that our wide-wavelength coverage etalon has finesse of 12 or larger which meets our specifications., while the transparency of the etalon is not very high. We also confirmed that the etalon is easy to maintain. The reason for small transparency is that we used only one etalon to cover the wavelength range which we intended to cover with two etalons. This is mainly because of our limited budget. Since the wavelength coverage for a etalon became large, it was difficult to make coating with constant reflectivity for the wavelength range. But the etalon was useful enough to try to make a multi-scanning Fabty-Perot imaging spectrograph. We modified a dichroic-mirror camera so that we can use it with the etalon. In order to carry out real astronomical observations, we need narrow-band filters. But The selection of the filters can be made for each scientific topic, which we can carry out in future.